1
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Saha R, Maharana SK, Jana NC, Bagh B. Copper-catalyzed C(sp 3)-H alkylation of fluorene with primary and secondary alcohols using a borrowing hydrogen method. Chem Commun (Camb) 2024; 60:10144-10147. [PMID: 39189332 DOI: 10.1039/d4cc03310h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
Despite the limited success of copper-catalyzed alkylations, (NNS)CuCl proved to be an effective catalyst for the sp3 C-H alkylation of fluorene with alcohols. Various primary alcohols and challenging secondary alcohols were successfully used. The practical applicability of the method was effectively tested with several post-functionalization reactions. This copper-catalyzed alkylation of fluorene involved a borrowing hydrogen mechanism.
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Affiliation(s)
- Ratnakar Saha
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, 752050, India.
| | - Suraj Kumar Maharana
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, 752050, India.
| | - Narayan Ch Jana
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, 752050, India.
| | - Bidraha Bagh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, 752050, India.
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2
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Saha R, Hembram BC, Panda S, Ghosh R, Bagh B. Iron-Catalyzed sp 3 C-H Alkylation of Fluorene with Primary and Secondary Alcohols: A Borrowing Hydrogen Approach. J Org Chem 2024. [PMID: 39175426 DOI: 10.1021/acs.joc.4c00819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
The utilization of earth-abundant, cheap, and nontoxic transition metals in important catalytic transformations is essential for sustainable development, and iron has gained significant attention as the most abundant transition metal. A mixture of FeCl2 (3 mol %), phenanthroline (6 mol %), and KOtBu (0.4 eqivalent) was used as an effective catalyst for the sp3 C-H alkylation of fluorene using alcohol as a nonhazardous alkylating partner, and eco-friendly water was formed as the only byproduct. The substrate scope includes a wide range of substituted fluorenes and substituted benzyl alcohols. The reaction is equally effective with challenging secondary alcohols and unactivated aliphatic alcohols. Selective mono-C9-alkylation of fluorenes with alcohols yielded the corresponding products in good isolated yields. Various postfunctionalizations of C-9 alkylated fluorene products were performed to establish the practical utility of this catalytic alkylation. Control experiments suggested a homogeneous reaction path involving borrowing hydrogen mechanism with the formation and subsequent reduction of 9-alkylidene fluorene intermediate.
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Affiliation(s)
- Ratnakar Saha
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha, PIN 752050, India
| | - Bhairab Chand Hembram
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha, PIN 752050, India
| | - Surajit Panda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha, PIN 752050, India
| | - Rahul Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha, PIN 752050, India
| | - Bidraha Bagh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha, PIN 752050, India
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3
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Blue light-emitting fluorene–dendron hybridized polymers: optophysical features. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04571-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
AbstractIn this manuscript, we have demonstrated an efficient and rapid synthetic strategy for preparation of new fluorene–dendron-hybridized blue light-emitting polymers P1–P7 by the reaction of 9,9 long-chain dialkylated fluorenes M2–M8 with dendronized monomer (M1) under microwave-assisted reaction condition. These fluorene–dendron-hybridized polymers P1–P7 were characterized using different spectroscopic techniques. Furthermore, the optophysical properties of these polymers P1–P7 were studied which revealed that these synthesized polymers P1–P7 have potential to emerge as capable materials in the development of diodes, particularly for blue light emission. In the future, similar approaches would be utilized for preparation of light-emitting polymer composite.
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4
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Wei D, Lv S, Zuo J, Zhang S, Liang S. Recent advances research and application of lignin-based fluorescent probes. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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5
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Wei J, Yang Y, Liu X, Li R, Li S. 2,3‐Disubstituted Fluorene Scaffold for Efficient Green Phosphorescent Organic Light‐Emitting Diodes. Chemistry 2022; 28:e202200756. [DOI: 10.1002/chem.202200756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Jia‐Jia Wei
- School of Environment and Chemical Engineering Jiangsu Ocean University 59 Cangwu Road, Haizhou District Lianyungang 222005 P. R. China
| | - Yong‐Jian Yang
- School of Environment and Chemical Engineering Jiangsu Ocean University 59 Cangwu Road, Haizhou District Lianyungang 222005 P. R. China
| | - Xiang‐Yang Liu
- WISPO Advanced Materials (Suzhou) Co., Ltd. 200 Xingpu Road, Shengpu Street, Suzhou Industrial Park (SIP) Suzhou 215126 P. R. China
| | - Runlai Li
- College of Polymer Science & Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China
| | - Shu‐an Li
- School of Environment and Chemical Engineering Jiangsu Ocean University 59 Cangwu Road, Haizhou District Lianyungang 222005 P. R. China
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6
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Rananaware MM, Ghase VD, Hasija D, Patil VR. Benzo crown ether functionalized conjugated polyfluorenes with anthracene fragment for sustainable light-emitting device technology. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03617-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Cruz-Hernández C, García-Espinosa DA, Guadarrama P. Click synthesis of novel dendronized curcumin and analogs. Strengthening of physicochemical properties toward biological applications. Org Biomol Chem 2022; 20:2643-2650. [PMID: 35285845 DOI: 10.1039/d2ob00284a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Curcumin and its analogs, chalcones, and C5-monocarbonyl are molecules of great therapeutic potential, but their poor stability and hydrophobicity have hampered their extensive use in clinical trials. Therefore, significant efforts have been made in materials science to improve their physicochemical properties. In this study, we propose dendronization as a synthetic strategy to strengthen some physicochemical properties such as solubility and stability of curcumin and analogs, taking advantage of the click chemistry (CuAAC) to attach second-generation polyester dendrons to the unsaturated cores. The dendronization, with the subsequent formation of aromatic triazole groups as linkers, not only modified the solubility and stability of the molecular systems but also favored the diketo tautomeric form of curcumin, as demonstrated spectroscopically. This result is significant since the diketo tautomer, which preserves the antioxidant properties of curcumin, is the most biologically active form. The hydrophobic/hydrophilic balance, achieved after dendronization, allowed the solubilization of the chromophoric molecules in buffered solutions at relevant pH values (7.4 and 6.4). Furthermore, the stability of all molecules was also upgraded since UV-vis absorption spectra did not exhibit modified profiles after 7 days at physiologic pH. From photochemical stability experiments irradiating at 415 nm, the dendritic derivatives containing triazole linkers were more susceptible to being degraded. All derivatives exhibited emission properties according to the length of each conjugate fragment. Fluorescence experiments evidenced the role of dendrons in preventing emission quenching by aggregation and exhibited differentiated emission behavior depending on the linker type (triazole or ester) between the chromophoric core and the polyester dendrons.
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Affiliation(s)
- Carlos Cruz-Hernández
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
| | | | - Patricia Guadarrama
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
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8
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Mei LJ, Li C, Zhao PJ, Chen T, Tian R, Guo J, Zhu MQ. Cationic Conjugated Polyelectrolytes with Aggregation-Induced Ratiometric Fluorescence. Macromol Rapid Commun 2022; 43:e2100899. [PMID: 35247010 DOI: 10.1002/marc.202100899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/11/2022] [Indexed: 11/11/2022]
Abstract
The molecular diversity of aggregation-induced emission remains to be challenging due to the limitation of conventional synthesis methods. Here, a series of novel neutral and cationic conjugated polymers composed with various ratios of tetraarylethylene (TAE) containing a bridged oxygen (O) and fluorene (F) units are designed and synthesized via the geminal cross-coupling (GCC) of 1,1-dibromoolefins. The incorporation of TAE segments into the conjugated backbone of polyfluorene produces pronounced aggregation-induced ratiometric fluorescence (AIRF), i.e., aggregation-induced emission (AIE) at 520-600 nm grows synergistically with aggregations-caused quenching (ACQ) at 400-450 nm. The content of fluorene unit in the polymer backbones determines the intensity of the initial fluorescence at blue light region. The huge distinction (about 150 nm) in dual emission wavelengths caused by the environment change makes these conjugated polyelectrolytes particularly suitable for ratiometric fluorescence sensing. Based on electrostatic interaction mechanism, the gradual addition of heparin into the cationic conjugated polymers aqueous solutions could induce dual-color fluorescence changes with a detection limit of 9 nM. This work exhibits the great facility of using GCC reaction to synthesis the conjugated TAE polymers with superior AIE properties and special functions. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Li-Jun Mei
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Chong Li
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Peng-Ju Zhao
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Tao Chen
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Rui Tian
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Jing Guo
- Optics Valley Truwin, Wuhan Institute of Biotechnology, Wuhan, 430075, P. R. China
| | - Ming-Qiang Zhu
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
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9
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Biswas A, Bains AK, Adhikari D. Ligand-assisted nickel catalysis enabling sp 3 C–H alkylation of 9 H-fluorene with alcohols. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00638c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A nickel catalysed chemoselective sp3 C–H alkylation of 9H-fluorene with alcohols is reported which follows a radical pathway employing the borrowing hydrogen route.
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Affiliation(s)
- Ayanangshu Biswas
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Knowledge City, Manauli-140306, India
| | - Amreen K. Bains
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Knowledge City, Manauli-140306, India
| | - Debashis Adhikari
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Knowledge City, Manauli-140306, India
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10
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Cruz-Hernández C, López-Méndez LJ, Guadarrama P. Dendronization: A practical strategy to improve the performance of molecular systems used in biomedical applications. Eur J Med Chem 2021; 229:113988. [PMID: 34801269 DOI: 10.1016/j.ejmech.2021.113988] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 11/06/2021] [Accepted: 11/08/2021] [Indexed: 01/05/2023]
Abstract
Nanomedicine is an emerging area that largely influences the efficacy of various therapies through the rational design of new materials exhibiting more targeted behavior. The synthetic effort, the amount of used material, and the cost are critical parameters to bear in mind if the production of the designed material is intended to be scaled for their widespread use. Even though materials science offers diverse options for different types of therapies, it is a difficult task to meet all the parameters mentioned above. The dendronization appears as an insightful approach to incorporate all the known benefits of the dendritic architecture by the attachment of dendrons to therapeutic agents, but in a much more affordable manner in terms of synthetic effort, amount of material, and cost. As will be presented, the most common dendrons used for biomedical applications are polyamide, polyester, carbosilane, polyether, and glycol-type, which are bonded to biological active molecules (BAMs), or molecular nanoplatforms (MPs) by hydrolysable bonds. Also relevant is the fact that the incorporation of dendrons not larger than third generation (G3) is sufficient to improve essential properties of these molecular systems, such as aqueous solubility, stability, and cellular internalization, among others. The type of dendron and its location on the BAMs or MPs, similar to placing a Lego piece on a model, will be decisive for obtaining the desired properties.
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Affiliation(s)
- Carlos Cruz-Hernández
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico.
| | - Luis José López-Méndez
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
| | - Patricia Guadarrama
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico.
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11
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Chang Y, Cao H, Feng Q, Wei Y, Bian L, Ling H, Lin D, Xie L, Huang W. Organic semiconductors based on complex diarylfluorenes via Friedel-Crafts protocols of fluorenols. CHINESE SCIENCE BULLETIN-CHINESE 2021. [DOI: 10.1360/tb-2021-0163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Xu H, Xie F, Lu Y, Wei P, Cai J. Fluorescent Amphiphilic Quaternized β-Chitin: Antibacterial Mechanism and Cell Imaging. ACS APPLIED BIO MATERIALS 2021; 4:5461-5470. [PMID: 35006718 DOI: 10.1021/acsabm.1c00179] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fluorescent materials span multiple applications from biological probes and chemical sensing to optoelectronic systems. Although great efforts have been made toward developing classes of fluorescent materials, 100,000+ traditional fluorescent dyes still suffer from the obstacle of aggregation-caused quenching (ACQ). Thus, designing fluorescent materials with excellent optical performance from ACQ luminogens remains challenging. In this work, we prepared fluorescent amphiphilic quaternized β-chitin (QC-F) via nucleophilic addition between the amino groups of QC and isothiocyanate groups of fluorescein isothiocyanate (FITC). Due to the covalent anchoring of the QC backbone, steric hindrance of the bulky acetamido groups, electrostatic repulsion of the quaternary ammonium groups, and homogeneous distribution of FITC units, the FITC units were spatially and electronically isolated, and the QC-F series exhibited unique fluorescent behaviors. The QC-F series could be used to observe their interactions with microbial cells through fluorescence imaging to gain insights into the QC antibacterial mechanism. Moreover, with their favorable cytocompatibility, the QC-F series are also suitable for cell imaging. Thus, the present work will broaden the applications of chitin and conventional ACQ luminogens.
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Affiliation(s)
- Huan Xu
- Hubei Engineering Center of Natural Polymers-Based Medical Materials, College of Chemistry & Molecular Sciences, Wuhan University, Wuhan 430072, China.,Key Laboratory of Coal Conversion and New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Fang Xie
- Hubei Engineering Center of Natural Polymers-Based Medical Materials, College of Chemistry & Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Yiwen Lu
- Hubei Engineering Center of Natural Polymers-Based Medical Materials, College of Chemistry & Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Pingdong Wei
- Hubei Engineering Center of Natural Polymers-Based Medical Materials, College of Chemistry & Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Jie Cai
- Hubei Engineering Center of Natural Polymers-Based Medical Materials, College of Chemistry & Molecular Sciences, Wuhan University, Wuhan 430072, China.,Research Institute of Shenzhen, Wuhan University, Shenzhen 518057, China
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13
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Yan ZC, Li Y, Guo Z, Shinohara A, Nakanishi T, Chen G, Pan C, Stadler FJ. Rheology of Conjugated Polymers with Bulky and Flexible Side Chains. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhi-Chao Yan
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Yanan Li
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Zhenfeng Guo
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Akira Shinohara
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
| | - Takashi Nakanishi
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
| | - Guangming Chen
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Chengjun Pan
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Florian J. Stadler
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
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14
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Fujiwara E, Orita R, Vyšniauskas A, Franckevičius M, Ishige R, Gulbinas V, Ando S. Ultrafast Spectroscopic Analysis of Pressure-Induced Variations of Excited-State Energy and Intramolecular Proton Transfer in Semi-Aliphatic Polyimide Films. J Phys Chem B 2021; 125:2425-2434. [PMID: 33629863 DOI: 10.1021/acs.jpcb.0c11500] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The relationship between the photoexcitation dynamics and the structures of semi-aliphatic polyimides (3H-PIs) was investigated using ultrafast fluorescent emission spectroscopy at atmospheric and increased pressures of up to 4 GPa. The 3H-PI films exhibited prominent fluorescence with extremely large Stokes shifts (Δν > 10 000 cm-1) through an excited-state intramolecular proton transfer (ESIPT) induced by keto-enol tautomerism at the isolated dianhydride moiety. The incorporation of bulky -CH3 and -CF3 side groups at the diamine moiety of the PIs increased the quantum yields of the ESIPT fluorescence owing to an enhanced interchain free volume. In addition, 3H-PI films emitted another fluorescence at shorter wavelengths originating from closely packed polyimide (PI) chains (in aggregated forms), which was mediated through a Förster resonance energy transfer (FRET) from an isolated enol form into aggregated forms. The FRET process became more dominant than the ESIPT process at higher pressures owing to an enhancement of the FRET efficiency caused by the increased dipole-dipole interactions associated with a densification of the PI chain packing. The efficiency of the FRET rapidly increased by applying pressure up to 1 GPa owing to an effective compression of the interchain free volume and additionally gradually increased at higher pressures owing to structural and/or conformational changes in the main chains.
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Affiliation(s)
- Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryoji Orita
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Aurimas Vyšniauskas
- Center for Physical Sciences and Technology, Sauletekio av. 3, Vilnius 10257, Lithuania
| | - Marius Franckevičius
- Center for Physical Sciences and Technology, Sauletekio av. 3, Vilnius 10257, Lithuania
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Vidmantas Gulbinas
- Center for Physical Sciences and Technology, Sauletekio av. 3, Vilnius 10257, Lithuania
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
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15
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Zhang M, Chen J, Wang M, Yuan M, Li R, Feng X, He Y, Mao X, Li Y, Xiong Z, Xing Z, Hu J, Wu G. Pyrene-Based Nonwoven Fabric with Tunable Fluorescence Properties by Employing the Aggregation-Caused Quenching Effect. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9036-9042. [PMID: 33587604 DOI: 10.1021/acsami.0c23132] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Conventional aromatic compounds tend to exhibit the formation of sandwich-shaped excimers and exciplexes between their excited and ground states at high concentrations or in their aggregated states, causing their fluorescence to weaken or disappear due to the aggregation-caused quenching (ACQ) effect. This limits their applications in concentrated solutions or solid materials. Herein, for the first time, ACQ-based pyrene (Py) units are covalently connected to the surface of polyethylene/polypropylene nonwoven fabric (PE/PP NWF) via electron beam preradiation-induced graft polymerization followed by chemical modification. The matrix can be considered a solid solvent and Py units as a solid solute, such that the amount of Py units can be controlled by varying the reaction time. The obtained fluorescent fabric not only exhibits remarkable fluorescence properties with high fluorescence intensity, high quantum yield (>90%), and excellent fluorescence stability after laundering or in harsh chemical environments, but the fluorescence color and intensity, quantum yield, and lifetime can also be regulated by employing the ACQ effect. Additionally, the as-prepared fluorescent fabric can effectively distinguish common monocyclic aromatic hydrocarbons via a simple fluorescence response test.
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Affiliation(s)
- Mingxing Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Junchang Chen
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Minglei Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
| | - Mengjia Yuan
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Rong Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
| | - Xinxin Feng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yulong He
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuanzhi Mao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
| | - Yulong Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
| | - Zhi Xiong
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
| | - Zhe Xing
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
| | - Jiangtao Hu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
| | - Guozhong Wu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District Shanghai 201800, China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai, 200031, China
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16
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Abdulkarim A, Nathusius M, Bäuerle R, Strunk KP, Beck S, Räder HJ, Pucci A, Melzer C, Jänsch D, Freudenberg J, Bunz UHF, Müllen K. Beyond p-Hexaphenylenes: Synthesis of Unsubstituted p-Nonaphenylene by a Precursor Protocol. Chemistry 2021; 27:281-288. [PMID: 32786130 PMCID: PMC7839583 DOI: 10.1002/chem.202001531] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 08/11/2020] [Indexed: 11/12/2022]
Abstract
The synthesis of unsubstituted oligo‐para‐phenylenes (OPP) exceeding para‐hexaphenylene—in the literature often referred to as p‐sexiphenyl—has long remained elusive due to their insolubility. We report the first preparation of unsubstituted para‐nonaphenylenes (9PPs) by extending our precursor route to poly‐para‐phenylenes (PPP) to a discrete oligomer. Two geometric isomers of methoxylated syn‐ and anti‐cyclohexadienylenes were synthesized, from which 9PP was obtained via thermal aromatization in thin films. 9PP was characterized via optical, infrared and solid‐state 13C NMR spectroscopy as well as atomic force microscopy and mass spectrometry, and compared to polymeric analogues. Due to the lack of substitution, para‐nonaphenylene, irrespective of the precursor isomer employed, displays pronounced aggregation in the solid state. Intermolecular excitonic coupling leads to formation of H‐type aggregates, red‐shifting emission of the films to greenish. 9PP allows to study the structure–property relationship of para‐phenylene oligomers and polymers, especially since the optical properties of PPP depend on the molecular shape of the precursor.
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Affiliation(s)
- Ali Abdulkarim
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany
| | - Marvin Nathusius
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Rainer Bäuerle
- InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany
| | - Karl-Philipp Strunk
- Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany.,Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Sebastian Beck
- InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany
| | - Hans Joachim Räder
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Annemarie Pucci
- InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany.,Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Christian Melzer
- InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany.,Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Daniel Jänsch
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany
| | - Jan Freudenberg
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany
| | - Uwe H F Bunz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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17
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Congrave DG, Drummond BH, Gray V, Bond AD, Rao A, Friend RH, Bronstein H. Suppressing aggregation induced quenching in anthracene based conjugated polymers. Polym Chem 2021. [DOI: 10.1039/d1py00118c] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate an anthracene based conjugated polymer with a solid state PLQY that is effectively unchanged compared to solution measurements, alongside an identical PL 0–0 transition wavelength in solution and thin film.
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Affiliation(s)
| | | | - Victor Gray
- Cavendish Laboratory
- University of Cambridge
- Cambridge
- UK
- Department of Chemistry – Ångström Laboratory
| | - Andrew D. Bond
- Department of Chemistry
- University of Cambridge
- Cambridge
- UK
| | - Akshay Rao
- Cavendish Laboratory
- University of Cambridge
- Cambridge
- UK
| | | | - Hugo Bronstein
- Department of Chemistry
- University of Cambridge
- Cambridge
- UK
- Cavendish Laboratory
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18
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Ando R, Jin M, Ito H. Charge-transfer crystal with segregated packing structure constructed with hexaarylbenzene and tetracyanoquinodimethane. CrystEngComm 2021. [DOI: 10.1039/d1ce00726b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Charge-transfer (CT) crystals bearing segregated domains between the hexaarylbenzene and TCNQ are a promising platform for developing new organic functional solid-state materials.
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Affiliation(s)
- Rempei Ando
- Division of Applied Chemistry and Frontier Chemistry Center (FCC), Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Mingoo Jin
- Division of Applied Chemistry and Frontier Chemistry Center (FCC), Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
| | - Hajime Ito
- Division of Applied Chemistry and Frontier Chemistry Center (FCC), Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
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19
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Brunner PLM, Laliberté D, Dang MT, Wantz G, Wuest JD. Dependence of the performance of light-emitting diodes on the molecular weight of the electroluminescent polymer PFO-MEH-PPV. CAN J CHEM 2020. [DOI: 10.1139/cjc-2020-0095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Controlled synthesis of the electroluminescent polymer PFO-MEH-PPV (poly[(9,9-dioctyl-2,7-divinylenefluorenylene)-alt-co-(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene)]) provided samples of varying molecular weight (Mw) in the range 20–360 kDa, as determined by gel-permeation chromatography and light scattering. The samples were used as the active layers in organic light-emitting diodes (OLEDs), and the performance of the devices was examined as a function of Mw. Turn-on voltages fell in the range 1.92–2.78 V, luminances varied from 231 to 5826 cd/m2, and luminous efficacies ranged from 0.06 to 0.90 lm/W. The emitted colour was found to vary from green to yellow as Mw increases. Optimal performance was attained by using PFO-MEH-PPV with Mw = 100 kDa. To help reveal how Mw determines the performance of OLEDs, relative quantum yields of photoluminescence in solutions and films were measured, and films were characterized by atomic force microscopy and transmission electron microscopy.
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Affiliation(s)
| | | | - Minh Trung Dang
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Guillaume Wantz
- CNRS, IMS, UMR 5218, Talence F-33400, France
- Bordeaux INP, IMS, UMR 5218, Talence F-33400, France
| | - James D. Wuest
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
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20
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An embedded lipid in the multidrug transporter LmrP suggests a mechanism for polyspecificity. Nat Struct Mol Biol 2020; 27:829-835. [PMID: 32719456 DOI: 10.1038/s41594-020-0464-y] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 06/17/2020] [Indexed: 12/17/2022]
Abstract
Multidrug efflux pumps present a challenge to the treatment of bacterial infections, making it vitally important to understand their mechanism of action. Here, we investigate the nature of substrate binding within Lactococcus lactis LmrP, a prototypical multidrug transporter of the major facilitator superfamily. We determined the crystal structure of LmrP in a ligand-bound outward-open state and observed an embedded lipid in the binding cavity of LmrP, an observation supported by native mass spectrometry analyses. Molecular dynamics simulations suggest that the anionic lipid stabilizes the observed ligand-bound structure. Mutants engineered to disrupt binding of the embedded lipid display reduced transport of some, but not all, antibiotic substrates. Our results suggest that a lipid within the binding cavity could provide a malleable hydrophobic component that allows adaptation to the presence of different substrates, helping to explain the broad specificity of this protein and possibly other multidrug transporters.
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21
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Shaikh MA, Agalave SG, Ubale AS, Gnanaprakasam B. Ligand-Free Ru-Catalyzed Direct sp 3 C-H Alkylation of Fluorene Using Alcohols. J Org Chem 2020; 85:2277-2290. [PMID: 31905282 DOI: 10.1021/acs.joc.9b02913] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The sp3 C-H alkylation of 9H-fluorene using alcohol and a Ru catalyst via the borrowing hydrogen concept has been described. This reaction was catalyzed by the [Ru(p-cymene)Cl2]2 complex (3 mol %) and exhibited a broad reaction scope with different alcohols, allowing primary and secondary alcohols to be employed as nonhazardous and greener alkylating agents with the formation of environmentally benign water as a byproduct. A variety of 9H-fluorene underwent selective and exclusive mono-C9-alkylation with primary alcohols in good to excellent isolated yield (26 examples, 50-92% yield), whereas this reaction with secondary alcohols in the absence of any external oxidants furnished the tetrasubstituted alkene as the major product. Furthermore, a base-mediated C-H hydroxylation of the synthesized 9H-fluorene derivatives afforded 9H-hydroxy-functionalized quaternary fluorene derivatives in excellent yield.
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Affiliation(s)
- Moseen A Shaikh
- Department of Chemistry , Indian Institute of Science Education and Research , Pune 411008 , India
| | - Sandip G Agalave
- Department of Chemistry , Indian Institute of Science Education and Research , Pune 411008 , India
| | - Akash S Ubale
- Department of Chemistry , Indian Institute of Science Education and Research , Pune 411008 , India
| | - Boopathy Gnanaprakasam
- Department of Chemistry , Indian Institute of Science Education and Research , Pune 411008 , India
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22
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Deep Blue Light Amplification from a Novel Triphenylamine Functionalized Fluorene Thin Film. Molecules 2019; 25:molecules25010079. [PMID: 31878329 PMCID: PMC6983032 DOI: 10.3390/molecules25010079] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/19/2019] [Accepted: 12/21/2019] [Indexed: 11/16/2022] Open
Abstract
The development of high performance optically pumped organic lasers operating in the deep blue still remains a big challenge. In this paper, we have investigated the photophysics and the optical gain characteristics of a novel fluorene oligomer functionalized by four triphenylamine (TPA) groups. By ultrafast spectroscopy we found a large gain spectral region from 420 to 500 nm with a maximum gain cross-section of 1.5 × 10−16 cm2 which makes this molecule a good candidate for photonic applications. Amplified Spontaneous Emission measurements (ASE) under 150 fs and 3 ns pump pulses have revealed a narrow emission at 450 nm with a threshold of 5.5 μJcm−2 and 21 μJcm−2 respectively. Our results evidence that this new fluorene molecule is an interesting material for photonic applications, indeed the inclusion of TPA as a lateral substituent leads to a high gain and consequently to a low threshold blue organic ASE.
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23
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Oakley JV, Stanley TJ, Jesse KA, Melanese AK, Alvarez AA, Prince AL, Cain SE, Wenzel AG, Iafe RG. Gold-Catalyzed Friedel-Crafts-Like Reaction of Benzylic Alcohols to Afford 1,1-Diarylalkanes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- James V. Oakley
- Department of Chemistry and Biochemistry; California State University San Marcos; 333 S. Twin Oaks Valley Rd 92096 San Marcos CA USA
| | - Tyler J. Stanley
- Department of Chemistry and Biochemistry; California State University San Marcos; 333 S. Twin Oaks Valley Rd 92096 San Marcos CA USA
| | - Kate A. Jesse
- Keck Science Department; Claremont McKenna, Pitzer, and Scripps Colleges; 925 N. Mills Ave 91711 Claremont CA USA
| | - Amanda K. Melanese
- Department of Chemistry and Biochemistry; California State University San Marcos; 333 S. Twin Oaks Valley Rd 92096 San Marcos CA USA
| | - Araceli A. Alvarez
- Department of Chemistry and Biochemistry; California State University San Marcos; 333 S. Twin Oaks Valley Rd 92096 San Marcos CA USA
| | - Aloha L. Prince
- Department of Chemistry and Biochemistry; California State University San Marcos; 333 S. Twin Oaks Valley Rd 92096 San Marcos CA USA
| | - Stephanie E. Cain
- Department of Chemistry and Biochemistry; California State University San Marcos; 333 S. Twin Oaks Valley Rd 92096 San Marcos CA USA
| | - Anna G. Wenzel
- Keck Science Department; Claremont McKenna, Pitzer, and Scripps Colleges; 925 N. Mills Ave 91711 Claremont CA USA
| | - Robert G. Iafe
- Department of Chemistry and Biochemistry; California State University San Marcos; 333 S. Twin Oaks Valley Rd 92096 San Marcos CA USA
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24
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Tan WS, Lee T, Tseng S, Hsu Y, Ebina M, Taketsugu T, Huang S, Yang J. Additive‐dependent iptycene incorporation in polyanilines: Insights into the pentiptycene clipping effect and the polymerization mechanism. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201900194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wei Shyang Tan
- Department of ChemistryNational Taiwan University Taipei Taiwan
| | - Ting‐Yin Lee
- Department of ChemistryNational Taiwan University Taipei Taiwan
| | | | - Ying‐Feng Hsu
- Department of ChemistryNational Taiwan University Taipei Taiwan
| | - Masanori Ebina
- Department of Chemistry, Faculty of ScienceHokkaido University Sapporo Japan
| | - Tetsuya Taketsugu
- Department of Chemistry, Faculty of ScienceHokkaido University Sapporo Japan
- Institute for Chemical Reaction Design and Discovery (WPI‐ICReDD)Hokkaido University Sapporo Japan
| | | | - Jye‐Shane Yang
- Department of ChemistryNational Taiwan University Taipei Taiwan
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25
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Shinohara A, Pan C, Guo Z, Zhou L, Liu Z, Du L, Yan Z, Stadler FJ, Wang L, Nakanishi T. Viskoelastische konjugierte polymere Fluide. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903148] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Akira Shinohara
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic EngineeringShenzhen University Nanhai Avenue 3688, Nanshan Shenzhen 518060 China
| | - Chengjun Pan
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Zhenfeng Guo
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Liyang Zhou
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Zhonghua Liu
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Lei Du
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Zhichao Yan
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Florian J. Stadler
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Lei Wang
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic EngineeringShenzhen University Nanhai Avenue 3688, Nanshan Shenzhen 518060 China
| | - Takashi Nakanishi
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
- International Center for Materials Nanoarchitectonics (WPI-MANA)National Institute for Materials Science (NIMS) Namiki 1-1 Tsukuba 305-0044 Japan
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26
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Watanabe S, Yamanishi K, Tsuji H. Conformational Control and Photophysical Properties of Methylene‐Tethered Bis[(naphthalene‐2‐yl)vinyl]benzenes. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shoya Watanabe
- Department of Chemistry, Faculty of ScienceKanagawa University 2946 Tsuchiya Hiratsuka 259-1293 Japan
| | - Katsunori Yamanishi
- Department of Chemistry, Faculty of ScienceKanagawa University 2946 Tsuchiya Hiratsuka 259-1293 Japan
| | - Hayato Tsuji
- Department of Chemistry, Faculty of ScienceKanagawa University 2946 Tsuchiya Hiratsuka 259-1293 Japan
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27
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Shinohara A, Pan C, Guo Z, Zhou L, Liu Z, Du L, Yan Z, Stadler FJ, Wang L, Nakanishi T. Viscoelastic Conjugated Polymer Fluids. Angew Chem Int Ed Engl 2019; 58:9581-9585. [PMID: 31034736 DOI: 10.1002/anie.201903148] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/16/2019] [Indexed: 12/24/2022]
Abstract
The introduction of optoelectronic functions into viscoelastic polymers can yield highly sophisticated soft materials for biomedical devices and autonomous robotics. However, viscoelasticity and excellent optoelectronic properties are difficult to achieve because the presence of a large number of π-conjugated moieties drastically stiffens a polymer. Here, we report a variation of additive-free viscoelastic conjugated polymers (VE-CPs) at room temperature by using an intact π-conjugated backbone and bulky, yet flexible, alkyl side chains as "internal plasticizers." Some of these polymers exhibit gel- and elastomer-like rheological behaviors without cross-linking or entanglement. Furthermore, binary blends of these VE-CPs exhibit a never-seen-before dynamic miscibility with self-restorable and mechanically induced fluorescence color changes.
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Affiliation(s)
- Akira Shinohara
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China.,Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Nanhai Avenue 3688, Nanshan, Shenzhen, 518060, China
| | - Chengjun Pan
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Zhenfeng Guo
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Liyang Zhou
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Zhonghua Liu
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Lei Du
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Zhichao Yan
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Florian J Stadler
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Lei Wang
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China.,Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Nanhai Avenue 3688, Nanshan, Shenzhen, 518060, China
| | - Takashi Nakanishi
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China.,International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, 305-0044, Japan
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28
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Qi J, Hu X, Dong X, Lu Y, Lu H, Zhao W, Wu W. Towards more accurate bioimaging of drug nanocarriers: turning aggregation-caused quenching into a useful tool. Adv Drug Deliv Rev 2019; 143:206-225. [PMID: 31158405 DOI: 10.1016/j.addr.2019.05.009] [Citation(s) in RCA: 148] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 05/04/2019] [Accepted: 05/29/2019] [Indexed: 01/12/2023]
Abstract
One of the current challenges in the monitoring of drug nanocarriers lies in the difficulties in discriminating the carrier-bound signals from the bulk signals of probes. Environment-responsive probes that enable signal switching are making steps towards a solution to this problem. Aggregation-caused quenching (ACQ), a phenomenon generally regarded as unfavorable in bioimaging, has turned out to be a promising characteristic for achieving environment-responsiveness and eliminating free-probe interference. So-called ACQ probes emit fluorescence when dispersed molecularly within the carrier matrix but quench immediately and absolutely once they are released into the ambient aqueous environment upon the degradation of the nanocarriers. Therefore, the fluorescence observed represents integral nanocarriers. Based on this rationale, the in vivo fates of various nanocarriers have been explored using live imaging equipment, with very interesting findings revealing the role of the particles. The current applications are however restricted to nanocarriers with highly hydrophobic matrices (lipid or polyester nanoparticles) or with a hydrophobic core-hydrophilic shell structure (micelles). The ACQ-based bioimaging strategy is emerging as a promising tool to achieve more accurate bioimaging of drug nanocarriers. This review article provides an overview of the ACQ phenomenon and the rationale for and examples of applications, as well as the limitations of the ACQ-based strategy, with a focus on improving the accuracy of bioimaging of nanoparticles.
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29
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Kadu RK, Thakur PB, Patil VR. Photophysical properties of new fluorene-based conjugated polymers containing polyphenylene-substituted dendronized core. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-018-2401-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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30
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Yu L, Li SS, Li W, Yu S, Liu Q, Xiao J. Fluorinated Alcohol-Promoted Reaction of Chlorohydrocarbons with Diverse Nucleophiles for the Synthesis of Triarylmethanes and Tetraarylmethanes. J Org Chem 2018; 83:15277-15283. [PMID: 30450905 DOI: 10.1021/acs.joc.8b02549] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This article reports an efficient synthesis of triarylmethanes and tetraarylmethanes from chlorohydrocarbons with miscellaneous nucleophiles in fluorinated alcohols, featuring metal-free, wide substrate scope, excellent functional group tolerance, and mild reaction conditions.
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Affiliation(s)
- Liping Yu
- College of Chemical Engineering , Qingdao University of Science and Technology , Qingdao 266042 , China
| | - Shuai-Shuai Li
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China
| | - Weina Li
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China
| | - Shitao Yu
- College of Chemical Engineering , Qingdao University of Science and Technology , Qingdao 266042 , China
| | - Qing Liu
- College of Chemical and Environmental Engineering , Shandong University of Science and Technology , Qingdao 266590 , China
| | - Jian Xiao
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China
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31
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Das P, Kumar A, Chowdhury A, Mukherjee PS. Aggregation-Induced Emission and White Luminescence from a Combination of π-Conjugated Donor-Acceptor Organic Luminogens. ACS OMEGA 2018; 3:13757-13771. [PMID: 31458076 PMCID: PMC6645036 DOI: 10.1021/acsomega.8b01706] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 10/05/2018] [Indexed: 05/19/2023]
Abstract
Two new star-shaped phenyl- and triazine-core based donor-acceptor (D-A) type conjugated molecules bearing triphenylamine end-capped arms were synthesized and characterized as imminent organic optoelectronic materials. Photophysical properties of the compounds were explored systematically via spectroscopic and theoretical methods. Because of the presence of donor-acceptor interactions, these luminogens display multifunctional properties, for instance, high extinction coefficient, large stokes shift, and pronounced solvatochromic effect. The compounds also exhibited phenomenon known as aggregation-induced emission on formation of nano-aggregates in the tetrahydrofuran-water mixture. The aggregate formation was confirmed by transmission electron microscopy, scanning electron microscopy, and dynamic light scattering analyses. Moreover, by controlling the electron withdrawing ability of the acceptor, complementary emissive fluorophores (blue and yellow) were achieved. These two complementary colors together span the entire range of visible spectrum (400-800 nm) and therefore when mixed in a requisite proportion generate white light in solution phase. These findings have potential for the progress of new organic white light radiating materials for applications in lighting and display devices.
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Affiliation(s)
- Paramita Das
- Department of Inorganic
and Physical Chemistry, Indian Institute
of Science, Bangalore 560012, India
- Department
of Chemistry, Asutosh College, 92, S. P. Mukherjee Road, Kolkata 700026, India
| | - Atul Kumar
- Department of Inorganic
and Physical Chemistry, Indian Institute
of Science, Bangalore 560012, India
| | - Aniket Chowdhury
- Department of Inorganic
and Physical Chemistry, Indian Institute
of Science, Bangalore 560012, India
| | - Partha Sarathi Mukherjee
- Department of Inorganic
and Physical Chemistry, Indian Institute
of Science, Bangalore 560012, India
- E-mail:
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32
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Adil LR, Gopikrishna P, Krishnan Iyer P. Receptor-Free Detection of Picric Acid: A New Structural Approach for Designing Aggregation-Induced Emission Probes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:27260-27268. [PMID: 30022660 DOI: 10.1021/acsami.8b07019] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A pristine aggregation-induced enhanced emission (AIEE) active monomer 2,5-bis(( E)-4-bromostyryl)-3,4-diphenylthiophene (TPBZ) and its copolymer (PFTPBZ) with 9,9-dioctylfluorene-2,7-diboronic acid bis(1,3-propandiol) ester have been synthesized via Suzuki coupling polymerization. PFTPBZ that is devoid of any receptor showed AIEE property and demonstrated excellent and selective fluorometric recognition of 2,4,6-trinitrotoluene (TNT) in aggregated state (aqueous medium) and picric acid (PA) in aggregated state and solution state (organic solvent) as well as in vapor phase via PFTPBZ dip-coated Whatman filter paper on a solid-phase platform in 1.86 ng level (naked eye). Limit of detection (LOD) for TNT in 95% water fraction ( fw) was 53.74 × 10-6 M, and at 40% fw, it was 14.26 × 10-7 M. PA detection in tetrahydrofuran solution was possible with a LOD of 28.16 × 10-7 M, 95% fw with LOD of 10.47 × 10-6 M, and in 40% fw with LOD of 47.39 × 10-8 M. As a unique example of structural design, the probe PFTPBZ surprisingly possesses no receptor, yet remarkably high selectivity was achieved via Förster resonance energy transfer (FRET) and photoinduced electron transfer from the copolymer PFTPBZ to PA and TNT. Detection of PA in the presence of various metal analytes and inorganic acids in real water samples (lakes, rivers, and sea water) was also demonstrated using this concept of receptor-free conjugated polymer probe.
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33
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Peterson GI, Bang KT, Choi TL. Mechanochemical Degradation of Denpols: Synthesis and Ultrasound-Induced Chain Scission of Polyphenylene-Based Dendronized Polymers. J Am Chem Soc 2018; 140:8599-8608. [DOI: 10.1021/jacs.8b05110] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gregory I. Peterson
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Ki-Taek Bang
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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34
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Yoon K, Dong G. Modular In Situ Functionalization Strategy: Multicomponent Polymerization by Palladium/Norbornene Cooperative Catalysis. Angew Chem Int Ed Engl 2018; 57:8592-8596. [DOI: 10.1002/anie.201804116] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/14/2018] [Indexed: 02/04/2023]
Affiliation(s)
- Ki‐Young Yoon
- Department of Chemistry University of Chicago Chicago IL 60637 USA
| | - Guangbin Dong
- Department of Chemistry University of Chicago Chicago IL 60637 USA
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35
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Yoon K, Dong G. Modular In Situ Functionalization Strategy: Multicomponent Polymerization by Palladium/Norbornene Cooperative Catalysis. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804116] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ki‐Young Yoon
- Department of Chemistry University of Chicago Chicago IL 60637 USA
| | - Guangbin Dong
- Department of Chemistry University of Chicago Chicago IL 60637 USA
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36
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Feng QY, Li B, Zuo ZY, Xie SL, Yu MN, Liu B, Wei Y, Xie LH, Xia RD, Huang W. A Comparison Study of Physicochemical Properties and Stabilities of H-Shaped Molecule and the Corresponding Polymer. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-018-2152-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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37
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Cho SR, Porte Y, Kim YC, Myoung JM. Effect of Nonionic Surfactant Additive in PEDOT:PSS on PFO Emission Layer in Organic-Inorganic Hybrid Light-Emitting Diode. ACS APPLIED MATERIALS & INTERFACES 2018; 10:9612-9619. [PMID: 29480008 DOI: 10.1021/acsami.7b19267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Poly(9,9-dioctylfluorene) (PFO) has attracted significant interests owing to its versatility in electronic devices. However, changes in its optical properties caused by its various phases and the formation of oxidation defects limit the application of PFO in light-emitting diodes (LEDs). We investigated the effects of the addition of Triton X-100 (hereinafter shortened as TX) in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) to induce interlayer diffusion between PEDOT:PSS and PFO to enhance the stability of the PFO phase and suppress its oxidation. Photoluminescence (PL) measurement on PFO/TX-mixed PEDOT:PSS layers revealed that, upon increasing the concentration of TX in the PEDOT:PSS layer, the β phase of PFO could be suppressed in favor of the glassy phase and the wide PL emission centered at 535 nm caused by ketone defects formed by oxidation was decreased considerably. LEDs were then fabricated using PFO as an emission layer, TX-mixed PEDOT:PSS as hole-transport layer, and zinc oxide (ZnO) nanorods as electron-transport layer. As the TX concentration reached 3 wt %, the devices exhibited dramatic increases in current densities, which were attributed to the enhanced hole injection due to TX addition, along with a shift in the dominant emission wavelength from a green electroluminescence (EL) emission centered at 518 nm to a blue EL emission centered at 448 nm. The addition of TX in PEDOT:PSS induced a better hole injection in the PFO layer, and through interlayer diffusion, stabilized the glassy phase of PFO and limited the formation of oxidation defects.
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Affiliation(s)
- Seong Rae Cho
- Department of Materials Science and Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| | - Yoann Porte
- Department of Materials Science and Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| | - Yun Cheol Kim
- Department of Materials Science and Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| | - Jae-Min Myoung
- Department of Materials Science and Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
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38
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Huang SH, Shih YW, Lin YL, Yang TF. Synthesis and Fluorescent Properties of Tetra-Biphenyl N
-Substituted Phthalimides. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sheng-Han Huang
- Department of Applied Chemistry; National Chi Nan University; Puli 545 Nantou, Taiwan
| | - Yu-Wei Shih
- Department of Applied Chemistry; National Chi Nan University; Puli 545 Nantou, Taiwan
| | - Yan-Liang Lin
- Department of Applied Chemistry; National Chi Nan University; Puli 545 Nantou, Taiwan
| | - Te-Fang Yang
- Department of Applied Chemistry; National Chi Nan University; Puli 545 Nantou, Taiwan
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39
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Chen L, Wu L, Yu J, Kuo CT, Jian T, Wu IC, Rong Y, Chiu DT. Highly photostable wide-dynamic-range pH sensitive semiconducting polymer dots enabled by dendronizing the near-IR emitters. Chem Sci 2017; 8:7236-7245. [PMID: 29081956 PMCID: PMC5633788 DOI: 10.1039/c7sc03448b] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 09/02/2017] [Indexed: 12/15/2022] Open
Abstract
One constraint of semiconducting polymer dots (Pdots), especially those with near-IR emission, is their low effective emitter ratio (∼1.5 mole percent), which limits their pH sensing performance. The other critical issue of existing Pdot-based pH sensors is their poor photostability. To address these issues, we developed a series of Pdots by dendronizing the squaraine-based pH responsive near-IR emitter, which is covalently incorporated into the polyfluorene (PFO) backbone. The fluorescence self-quenching of the NIR squaraine emitter was effectively suppressed at a high emitter concentration of 5 mole percent. Through controlling the individually incomplete energy transfer from the amorphous PFO donor to the blue β-phase PFO and NIR squaraine emitter, we obtained a ratiometric pH sensor with simultaneously improved pH sensitivity, brightness, and photostability. The Pdots showed a fast and reversible pH response over the whole biological pH range of 4.7 to 8.5. Intracellular pH mapping was successfully demonstrated using this ultra-bright and photostable Pdot-based pH indicator.
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Affiliation(s)
- L Chen
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , USA .
| | - L Wu
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , USA .
| | - J Yu
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , USA .
| | - C-T Kuo
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , USA .
| | - T Jian
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , USA .
| | - I-C Wu
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , USA .
| | - Y Rong
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , USA .
| | - D T Chiu
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , USA .
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40
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Chalke RM, Patil VR. Novel methoxy spirobifluorene and alkyl substituted diphenylacene based organic blue light emitting polymers for application in organic electronics. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.07.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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41
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Stobe C, Pyka I, Linke A, Müller S, Schnakenburg G, Waldvogel SR, Lützen A. Synthesis of 9,9'-Spirobifluorenes and 4,5-Diaza-9,9'-spirobifluorenes and Their Application as Affinity Materials for Quartz Crystal Microbalances. Chempluschem 2017; 82:758-769. [PMID: 31961518 DOI: 10.1002/cplu.201700105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Indexed: 12/23/2022]
Abstract
Two different classes of aza analogues of 9,9'-spirobifluorenes have been synthesized. These were obtained by either furnishing the spirobifluorene with additional pyridyl moieties or by installing the aza function directly into the spirobifluorene core. These structurally rigid compounds were then evaluated as affinity materials for quartz crystal microbalances and proved to be highly potent for the detection of volatile organic compounds.
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Affiliation(s)
- Caroline Stobe
- Rheinische Friedrich-Wilhelms-Universität Bonn, Kekulé-Institut für Organische Chemie und Biochemie, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Isabella Pyka
- Johannes Gutenberg-Universität Mainz, Institut für Organische Chemie, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Alexander Linke
- Johannes Gutenberg-Universität Mainz, Institut für Organische Chemie, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Sarah Müller
- Rheinische Friedrich-Wilhelms-Universität Bonn, Kekulé-Institut für Organische Chemie und Biochemie, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Gregor Schnakenburg
- Rheinische Friedrich-Wilhelms-Universität Bonn, Institut für Anorganische Chemie, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Siegfried R Waldvogel
- Johannes Gutenberg-Universität Mainz, Institut für Organische Chemie, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Arne Lützen
- Rheinische Friedrich-Wilhelms-Universität Bonn, Kekulé-Institut für Organische Chemie und Biochemie, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
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42
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Syntheses and characterizations of high refractive index and low birefringence polyimides containing spirobifluorene in the side chain. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.04.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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43
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An Efficient Violet Amplified Spontaneous Emission (ASE) from a Conjugated Polymer (PFO-co-pX) in Solution. MATERIALS 2017; 10:ma10030265. [PMID: 28772625 PMCID: PMC5503314 DOI: 10.3390/ma10030265] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 02/18/2017] [Accepted: 02/24/2017] [Indexed: 11/17/2022]
Abstract
The optical of conjugated polymer poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(2,5-p-xylene)] also known as [(PFO-co-pX), ADS145UV], dissolved in a few solvents, has been measured. The absorption, emission spectra, and quantum yield have been investigated by using a spectrophotometer and spectrofluorometer, respectively. The properties of Amplified Spontaneous Emission (ASE) of conjugated PFO-co-pX polymer under different conditions such as solvent type, concentration, and pumping energy have been examined by using the tripled frequency of a Nd:YAG laser as a source of pumping. The relation between output energy and pumping energy for the samples with different concentrations in three solvents has been studied. In addition, efficiency and optical gain from the ASE were measured. Additionally, the stability of this polymer as a laser material was investigated. Among the host of conjugated polymer lasers obtained by optical pumping, this conjugated polymer has exhibited only one ASE band under a wide range of concentrations and pump power values. This is most likely due to the steric hindrance by the copolymer segment pX (2,5-p-xylene). This investigation has provided new insights into the excited state dynamics of conjugated polymer materials and has shown that this new conjugated polymer is quite efficient in the violet region.
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44
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Srinivasan V, Jhonsi MA, Dhenadhayalan N, Lin KC, Jaccob M, Kathiravan A. AIE Nanodots Obtained from a Pyrene Schiff Base and Their Applications. ChemistrySelect 2017. [DOI: 10.1002/slct.201601824] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Venkatesan Srinivasan
- Department of Chemistry; B. S. Abdur Rahman University, Vandalur; Chennai- 600 048 India
| | - Mariadoss Asha Jhonsi
- Department of Chemistry; B. S. Abdur Rahman University, Vandalur; Chennai- 600 048 India
| | - Namasivayam Dhenadhayalan
- Department of Chemistry; National Taiwan University and Institute of Atomic and Molecular, Sciences Academia Sinica; Taipei 106 Taiwan
| | - King-Chuen Lin
- Department of Chemistry; National Taiwan University and Institute of Atomic and Molecular, Sciences Academia Sinica; Taipei 106 Taiwan
| | - Madhavan Jaccob
- Department of Chemistry & Computational Chemistry Laboratory; Loyola Institute of Frontier Energy (LIFE), Loyola College; Chennai - 600 034, Tamil Nadu India
| | - Arunkumar Kathiravan
- National Centre for Ultrafast Processes; University of Madras, Taramani Campus; Chennai - 600 113, Tamil Nadu India
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45
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Hempe M, Reggelin M. Molecular packing and morphological stability of dihydro-indeno[1,2-b]fluorenes in the context of their substitution pattern. RSC Adv 2017. [DOI: 10.1039/c7ra09401a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The synthesis and structural characterization of a series of dihydroindeno[1,2-b]fluorene (IF) derivatives with various side chain substituents is reported.
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Affiliation(s)
- M. Hempe
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie
- Technische Universität Darmstadt
- 64287 Darmstadt
- Germany
| | - M. Reggelin
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie
- Technische Universität Darmstadt
- 64287 Darmstadt
- Germany
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46
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Yu MN, Ou CJ, Liu B, Lin DQ, Liu YY, Xue W, Lin ZQ, Lin JY, Qian Y, Wang SS, Cao HT, Bian LY, Xie LH, Huang W. Progress in fluorene-based wide-bandgap steric semiconductors. CHINESE JOURNAL OF POLYMER SCIENCE 2016. [DOI: 10.1007/s10118-017-1897-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Muthuraj B, Mukherjee S, Patra CR, Iyer PK. Amplified Fluorescence from Polyfluorene Nanoparticles with Dual State Emission and Aggregation Caused Red Shifted Emission for Live Cell Imaging and Cancer Theranostics. ACS APPLIED MATERIALS & INTERFACES 2016; 8:32220-32229. [PMID: 27933822 DOI: 10.1021/acsami.6b11373] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A newly synthesized polyfluorene derivative with pendant di(2-picolyl)amine (PF-DPA) shows dual state emission and aggregation caused red shifted emission that was utilized for cell imaging and cancer theranostics. PF-DPA was nontoxic to normal cells but showed cytotoxicity against cancer cells, suggesting its utility for cancer therapy. PF-DPA exhibits a large and unique red shifted emission at 556 nm at higher water ratio of THF:H2O (10:90) due to the formation of polymer nanoparticles or PDots spontaneously by intra- and intermolecular self-assembly induced aggregation. Dual state emission and aggregation caused red shifted emission (>100 nm) in PF-DPA homopolymer nanoparticles is very unique and attributed to the combined effect of intramolecular planarization and J-type aggregate formation in the PDots (25 ± 5 nm). The PF-DPA PDots exhibit bright green and orange fluorescence with exceptional live cell imaging properties and potential applications in cancer theranostics due to their selective cytotoxic nature toward cancer cells.
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Affiliation(s)
- Balakrishnan Muthuraj
- Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781039, India
| | - Sudip Mukherjee
- Biomaterials Group, CSIR-Indian Institute of Chemical Technology , Uppal Road, Tarnaka, Hyderabad 500007, Telangana State, India
- Academy of Scientific and Innovative Research (AcSIR) , Taramani, Chennai 600 113, India
| | - Chitta Ranjan Patra
- Biomaterials Group, CSIR-Indian Institute of Chemical Technology , Uppal Road, Tarnaka, Hyderabad 500007, Telangana State, India
- Academy of Scientific and Innovative Research (AcSIR) , Taramani, Chennai 600 113, India
| | - Parameswar Krishnan Iyer
- Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati 781039, India
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48
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Tsuchiya Y, Noguchi T, Yoshihara D, Roy B, Yamamoto T, Shinkai S. Conformation Control of a Conjugated Polymer through Complexation with Bile Acids Generates Its Novel Spectral and Morphological Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12403-12412. [PMID: 27327101 DOI: 10.1021/acs.langmuir.6b01639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Control of higher-order polymer structures attracts a great deal of interest for many researchers when they lead to the development of materials having various advanced functions. Among them, conjugated polymers that are useful as starting materials in the design of molecular wires are particularly attractive. However, an equilibrium existing between isolated chains and bundled aggregates is inevitable and has made their physical properties very complicated. As an attempt to simplify this situation, we previously reported that a polymer chain of a water-soluble polythiophene could be isolated through complexation with a helix-forming polysaccharide. More recently, a covalently self-threading polythiophene was reported, the main chain of which was physically protected from self-folding and chain-chain π-stacking. In this report, we wish to report a new strategy to isolate a water-soluble polythiophene and to control its higher-order structure by a supramolecular approach: that is, among a few bile acids, lithocholate can form stoichiometric complexes with cationic polythiophene to isolate the polymer chain, and the higher-order structure is changeable by the molar ratio. The optical and morphological studies have been thoroughly performed, and the resultant complex has been applied to the selective recognition of two AMP structural isomers.
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Affiliation(s)
- Youichi Tsuchiya
- Nanotechnology Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), Kyudaishinmachi 4-1, Nishi-ku, Fukuoka 819-0388, Japan
| | | | - Daisuke Yoshihara
- Nanotechnology Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), Kyudaishinmachi 4-1, Nishi-ku, Fukuoka 819-0388, Japan
| | | | - Tatsuhiro Yamamoto
- Nanotechnology Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), Kyudaishinmachi 4-1, Nishi-ku, Fukuoka 819-0388, Japan
| | - Seiji Shinkai
- Nanotechnology Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), Kyudaishinmachi 4-1, Nishi-ku, Fukuoka 819-0388, Japan
- Department of Nanoscience, Faculty of Engineering, Sojo University , Ikeda 4-22-1, Nishi-ku, Kumamoto 860-0082, Japan
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49
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Liu B, Lin J, Liu F, Yu M, Zhang X, Xia R, Yang T, Fang Y, Xie L, Huang W. A Highly Crystalline and Wide-Bandgap Polydiarylfluorene with β-Phase Conformation toward Stable Electroluminescence and Dual Amplified Spontaneous Emission. ACS APPLIED MATERIALS & INTERFACES 2016; 8:21648-21655. [PMID: 27480142 DOI: 10.1021/acsami.6b05247] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Bulky conjugated polymers with high crystallinity is the prerequisite for the overall improvement of performance in wide-bandgap semiconductors, including charge transport, photoluminescence quantum yield, processing reliability, and stability. Herein, we report a stable β-phase film of bulky polydiarylfluorene (PODPF) preparing by thermal annealing at ∼220 °C. The β-phase conformation and regular molecular packing are confirmed by UV-vis, photoluminescence (PL), Raman spectra, and grazing incidence X-ray diffraction (GIXD), respectively. Polymer light-emitting diodes (PLEDs) with crystalline and β-phase film serving as the active layer exhibit higher current efficiency of 1.8 cd/A (6.0 V) and more stable electroluminescence over the amorphous one. Surprisingly, mixed conformations in PODPF film produce dually tunable amplified spontaneous emission (ASE) at 463 and 482 nm. Polydiarylfluorenes with quasi-planar conformation will be a promising candidate for the next-generation gain medium toward a broadly tunable lasing and dual-wavelength laser.
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Affiliation(s)
- Bin Liu
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
| | - Jinyi Lin
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211816, China
| | - Feng Liu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211816, China
| | - Mengna Yu
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
| | - Xinwen Zhang
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
| | - Ruidong Xia
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
| | - Tao Yang
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
| | - Yueting Fang
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
| | - Linghai Xie
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
| | - Wei Huang
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211816, China
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50
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Vij V, Bhalla V, Kumar M. Hexaarylbenzene: Evolution of Properties and Applications of Multitalented Scaffold. Chem Rev 2016; 116:9565-627. [DOI: 10.1021/acs.chemrev.6b00144] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Varun Vij
- Department of Chemistry,
UGC Centre for Advanced Studies, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | - Vandana Bhalla
- Department of Chemistry,
UGC Centre for Advanced Studies, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | - Manoj Kumar
- Department of Chemistry,
UGC Centre for Advanced Studies, Guru Nanak Dev University, Amritsar, Punjab 143005, India
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