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Zhao YY, Li ZQ, Gong ZL, Bernhard S, Zhong YW. Endowing Metal-Organic Coordination Materials with Chiroptical Activity by a Chiral Anion Strategy. Chemistry 2024; 30:e202400685. [PMID: 38469986 DOI: 10.1002/chem.202400685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 03/07/2024] [Accepted: 03/12/2024] [Indexed: 03/13/2024]
Abstract
Recently, chiral metal-organic coordination materials have emerged as promising candidates for a wide range of applications in chiroptoelectronics, chiral catalysis, and information encryption, etc. Notably, the chiroptical effect of coordination chromophores makes them appealing for applications such as photodetectors, OLEDs, 3D displays, and bioimaging. The direct synthesis of chiral coordination materials using chiral organic ligands or complexes with metal-centered chirality is very often tedious and costly. In the case of ionic coordination materials, the combination of chiral anions with cationic, achiral coordination compounds through noncovalent interactions may endow molecular materials with desirable chiroptical properties. The use of such a simple chiral strategy has been proven effective in inducing promising circular dichroism and/or circularly polarized luminescence signals. This concept article mainly delves into the latest advances in exploring the efficacy of such a chiral anion strategy for transforming achiral coordination materials into chromophores with superb photo- or electro-chiroptical properties. In particular, ionic small-molecular metal complexes, metal clusters, coordination supramolecular assemblies, and metal-organic frameworks containing chiral anions are discussed. A perspective on the future opportunities on the preparation of chiroptical materials with the chiral anion strategy is also presented.
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Affiliation(s)
- Yuan-Yuan Zhao
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhong-Qiu Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zhong-Liang Gong
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Stefan Bernhard
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania, 15213, United States of America
| | - Yu-Wu Zhong
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
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2
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Zhang T, Zhang Y, He Z, Yang T, Hu X, Zhu T, Zhang Y, Tang Y, Jiao J. Recent Advances of Chiral Isolated and Small Organic Molecules: Structure and Properties for Circularly Polarized Luminescence. Chem Asian J 2024; 19:e202400049. [PMID: 38450996 DOI: 10.1002/asia.202400049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/08/2024]
Abstract
This paper explores recent advancements in the field of circularly polarized luminescence (CPL) exhibited by small and isolated organic molecules. The development and application of small CPL molecule are systematically reviewed through eight different chiral skeleton sections. Investigating the intricate interplay between molecular structure and CPL properties, the paper aims at providing and enlighting novel strategies for CPL-based applications.
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Affiliation(s)
- Tingwei Zhang
- School of Chemistry and Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Yue Zhang
- School of Chemistry and Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Zhiyuan He
- School of Chemistry and Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Tingjun Yang
- School of Chemistry and Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Xu Hu
- School of Chemistry and Chemical Engineering at, Shaanxi Normal University, Xi'an, 710062, P.R. China
| | - Tengfei Zhu
- Engineering Research Center of Oil and Gas Field Chemistry, Xi'an Shiyou University, Xi'an, 710065, China
| | - Yanfeng Zhang
- School of Chemistry and Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Yuhai Tang
- School of Chemistry and Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Jiao Jiao
- School of Chemistry and Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
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3
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Saleh N, Sucre-Rosales E, Zinna F, Besnard C, Vauthey E, Lacour J. Axially-chiral boramidine for detailed (chir)optical studies. Chem Sci 2024; 15:6530-6535. [PMID: 38699281 PMCID: PMC11062121 DOI: 10.1039/d4sc00870g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 03/25/2024] [Indexed: 05/05/2024] Open
Abstract
The inclusion of boron atoms into chiral π-conjugated systems is an effective strategy to unlock unique chiroptical properties. Herein, the preparation and characterization of a configurationally stable axially-chiral boramidine are reported, showcasing absorption in the UV domain, deep-blue fluorescence (Φ up to 94%), and ca. |10-3| gabs and glum values. Detailed photophysical studies and quantum-chemical calculations clearly elucidate the deactivation pathways of the emissive state to triplet excited states, involving increased spin-orbit coupling between the lowest singlet excited state and an upper triplet state.
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Affiliation(s)
- Nidal Saleh
- Department of Organic Chemistry, University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Estefanía Sucre-Rosales
- Department of Physical Chemistry, University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Francesco Zinna
- Dipartimento di Chimica e Chimica Industriale, University of Pisa Via G. Moruzzi 13 56124 Pisa Italy
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva Quai Ernest Ansermet 24 1211 Geneva 4 Switzerland
| | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
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4
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Kobayashi K, Sakai KI, Suzuki S, Imai Y, Tsushima T, Akutagawa T. Supramolecular Chirality Achieved by Assembly of Small π-Molecules of Octahydrobinaphtols with Axial Chirality. J Phys Chem B 2024. [PMID: 38685887 DOI: 10.1021/acs.jpcb.3c08464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
5,5',6,6',7,7',8,8'-Octahydro-1,1'-bi-2-naphthol (hbNaph) is an axially chiral molecule consisting of a smaller π-electronic system than that for 1,1'-bi-2-naphthol (BINOL). The absorption and circular dichroism (CD) bands of hbNaph appear in a shorter wavelength region below 310 nm, compared to those of BINOL, and its fluorescence is in the invisible UV region. However, increasing the concentration of hbNaph in solution up to 0.1 M results in its absorption edge gradually extending to longer wavelength, with a shoulder around 330 nm, and finally increasing to about 450 nm. At the same time, blue fluorescence is clearly observed, as well as a new CD band with the sign of the Cotton signals reversed from those obtained for dilute solutions. These results suggest that, at high concentrations, hbNaph forms chiral aggregates, in which π-electrons are delocalized over multiple molecules. To further understand how molecular axial chirality is transformed to supramolecular chirality, we attempted to construct aggregate models by simulating CD spectra using a time-dependent density functional theory. The only reasonable model obtained was that involving the counterclockwise R-enantiomer forming a clockwise helix, while the clockwise S-enantiomer forms a counterclockwise helix. We conclude, however, that, for such helixes, the most plausible model is densely packed and forms when the dihedral angle between the two phenol rings of hbNaph is acute, at around 75°, which reproduces the aggregate-induced CD sign inversion.
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Affiliation(s)
- Kei Kobayashi
- Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology (CIST), Chitose 066-8655, Japan
| | - Ken-Ichi Sakai
- Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology (CIST), Chitose 066-8655, Japan
| | - Seika Suzuki
- Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
| | - Toshitaka Tsushima
- Polymer Hybrid Materials Research Center, Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Tomoyuki Akutagawa
- Polymer Hybrid Materials Research Center, Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
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5
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Sun T, Guo L, Li Q, Cao ZC. Nickel-Catalyzed Chemoselective Carbomagnesiation for Atroposelective Ring-Opening Difunctionalization. Angew Chem Int Ed Engl 2024:e202401756. [PMID: 38651647 DOI: 10.1002/anie.202401756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/15/2024] [Accepted: 04/23/2024] [Indexed: 04/25/2024]
Abstract
There is a pressing need for methods that can connect enantioenriched organic compounds with readily accessible building blocks via asymmetric functionalization of unreactive chemical bonds in organic synthesis and medicinal chemistry. Herein, the asymmetric chemoselective cleavage of two unactivated C(Ar)-O bonds in the same molecule is disclosed for the first time through an unusual nickel-catalyzed carbomagnesiation. This reaction facilitates the evolution of a novel atroposelective ring-opening difunctionalization. Utilizing readily available dibenzo bicyclic substrates, diverse valuable axially chiral biaryls are furnished with high efficiencies. Synthetic elaborations showcase the application potential of this method. The features of this method include good atom-economy, multiple roles of the nucleophile, and a simple catalytic system that enables the precise magnesiation of an α-C(Ar)-O bond and arylation of a β-C(Ar)-O bond.
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Affiliation(s)
- Tingting Sun
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, Anhui Agricultural University, No. 130, Changjiangxilu, Hefei, Anhui, China, 230036
| | - Linchao Guo
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, Anhui Agricultural University, No. 130, Changjiangxilu, Hefei, Anhui, China, 230036
| | - Qi Li
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, Anhui Agricultural University, No. 130, Changjiangxilu, Hefei, Anhui, China, 230036
| | - Zhi-Chao Cao
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, Anhui Agricultural University, No. 130, Changjiangxilu, Hefei, Anhui, China, 230036
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6
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Xu Q, Jia J, Fan H, Ma Z, Wu Y, Zhang Y, Su P, Gao W, Wang Y, Li D. Catalytic Atroposelective Synthesis of Axially Chiral Heterobiaryl Oxime Ethers via the One-Step Dynamic Kinetic Condensation Reaction. Org Lett 2024. [PMID: 38502802 DOI: 10.1021/acs.orglett.4c00479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
The catalytic atroposelective synthesis of axially chiral heterobiaryls was first developed through the direct one-step dynamic kinetic condensation reaction with the simple transformation of the C═O bond to the C═N bond, delivering a series of novel axially chiral heterobiaryl oxime ethers.
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Affiliation(s)
- Qianqian Xu
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Jifan Jia
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Haitong Fan
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Zhifeng Ma
- School of Chemistry and Environment, Yunnan Minzu University, Kunming, Yunnan 650500, China
| | - Yuqing Wu
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Yifeng Zhang
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, National Resource Center for Chi-nese Materia Medica, China Academy of Chinese Medical Science, Beijng 100700, China
| | - Ping Su
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, National Resource Center for Chi-nese Materia Medica, China Academy of Chinese Medical Science, Beijng 100700, China
| | - Wei Gao
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Yuji Wang
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Dan Li
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
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7
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He B, Zhong Q, Dong Q, Yang X, Cowling SJ, Qiao W, Bruce DW, Zhu W, Duan P, Wang Y. Liquid-crystalline circularly polarised TADF emitters for high-efficiency, solution-processable organic light-emitting diodes. MATERIALS HORIZONS 2024; 11:1251-1260. [PMID: 38131645 DOI: 10.1039/d3mh01736b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Achieving a high emission efficiency and a large luminescence asymmetry factor (glum) in a single molecule exhibiting circularly polarised thermally activated delayed fluorescence (CP-TADF) remains a formidable challenge. In this work, a proof-of-concept, liquid-crystalline CP-TADF molecule is proposed to realise high glum by taking advantage of the order inherent in liquid crystals. Employing a chiral dinaphthol-based CP-TADF molecule as the emissive unit, a pair of liquid-crystalline CP-TADF molecules (R/S-4) is synthesised via the introduction of six mesogenic moieties. The enantiomers show intense emission at about 520 nm which has clear TADF and liquid-crystalline characteristics. Both enantiomers display symmetrical electronic circular dichroism (CD) and circular polarisation luminescence (CPL) signals as thin films. Impressively, relatively large glum values of 0.11 are realised for the films. Solution-processed devices were fabricated using R/S-4 as the dopants, with the TADF molecule CzAcSF as the sensitiser. The OLEDs so prepared show a very high maximum external quantum efficiency of 21.2%, revealing a novel strategy for realising large glum values in CP-TADF.
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Affiliation(s)
- Binghong He
- School of Materials Science & Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Changzhou University, Changzhou 213164, P. R. China.
| | - Qihang Zhong
- School of Materials Science & Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Changzhou University, Changzhou 213164, P. R. China.
| | - Qiwei Dong
- School of Materials Science & Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Changzhou University, Changzhou 213164, P. R. China.
| | - Xuefeng Yang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, P. R. China.
| | - Stephen J Cowling
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - Wenjian Qiao
- School of Materials Science & Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Changzhou University, Changzhou 213164, P. R. China.
- Zaozhuang Reinno Optoelectronic Information Co., Ltd., China
| | - Duncan W Bruce
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - Weiguo Zhu
- School of Materials Science & Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Changzhou University, Changzhou 213164, P. R. China.
| | - Pengfei Duan
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, P. R. China.
| | - Yafei Wang
- School of Materials Science & Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Changzhou University, Changzhou 213164, P. R. China.
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8
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Jiang A, Cui H, Zhang L, Cao C, Dai H, Lu C, Ge C, Lu H, Wu ZG. Functionalization of the Octahydro-Binaphthol Skeleton: A Universal Strategy for Directly Constructing D-A Type Axially Chiral Biphenyl Luminescent Molecules. J Org Chem 2024; 89:3605-3611. [PMID: 38364322 DOI: 10.1021/acs.joc.3c02600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
D-A type axially chiral biphenyl luminescent molecules are directly constructed through ingenious functionalization of the octahydro-binaphthol skeleton without optical resolution. The circularly polarized organic light-emitting diodes based on them display remarkable circularly polarized electroluminescence emission, a high luminance of >10 000 cd m-2, a maximum external quantum efficiency of 6.6%, and an extremely low-efficiency roll-off. This work provides a universal strategy for developing efficient and diverse axially chiral biphenyl emitters.
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Affiliation(s)
- Aiwei Jiang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, P. R. China
| | - Huihui Cui
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, P. R. China
| | - Li Zhang
- Nantong Cellulose Fibers Company, Ltd., Nantong, Jiangsu 226007, P. R. China
| | - Chenhui Cao
- Anhui Sholon New Material Technology Company, Ltd., Chuzhou, Anhui 239500, P. R. China
| | - Hong Dai
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, P. R. China
| | - Chaowu Lu
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, P. R. China
| | - Cunwang Ge
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, P. R. China
| | - Hongbin Lu
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, P. R. China
| | - Zheng-Guang Wu
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, P. R. China
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9
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Yan H, Yin X, Wang D, Han T, Tang BZ. Synergistically Boosting the Circularly Polarized Luminescence of Functionalized Pillar[5]arenes by Polymerization and Aggregation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2305149. [PMID: 37867209 PMCID: PMC10724438 DOI: 10.1002/advs.202305149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/03/2023] [Indexed: 10/24/2023]
Abstract
Supramolecular polymers based on chiral macrocycles have attracted increasing attention in the field of circularly polarized luminescence (CPL) owing to their unique properties. However, the construction of macrocyclic supramolecular polymers with highly efficient CPL properties in aggregate states still remains challenging. Herein, w e constructed a class of macrocycle-based coordination polymers by combining the planar chiral properties of pillar[5]arene with the excellent fluorescence properties of aggregation-induced emission luminogens. The formation of polymers enhances both the fluorescence and chiral properties, resulting in chiral supramolecular polymers with remarkable CPL properties. Increasing the aggregation degree of the polymers can further improve their CPL properties, as evidenced by a 21-fold increase in the dissymmetry factor and an over 25-fold increase in the fluorescence quantum yield in the aggregate state compared to the solution state. Such a synergistic effect of polymerization- and aggregation-enhanced CPL can be explained by the restriction of intramolecular motions and aggregation-induced conformation confinement. This work provides a promising method for developing highly efficient CPL supramolecular polymers.
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Affiliation(s)
- Hewei Yan
- Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and EngineeringShenzhen UniversityShenzhenGuangdong518060China
- College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China
| | - Xiaojun Yin
- Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and EngineeringShenzhen UniversityShenzhenGuangdong518060China
| | - Dong Wang
- Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and EngineeringShenzhen UniversityShenzhenGuangdong518060China
| | - Ting Han
- Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and EngineeringShenzhen UniversityShenzhenGuangdong518060China
| | - Ben Zhong Tang
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen (CUHK‐Shenzhen)Guangdong518172China
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10
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Liu R, Li JQ, Liu YY, He X. Structural diversity and luminescence of zinc coordination polymers constructed by flexible ligands. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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11
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Takaishi K, Maeda C, Ema T. Circularly polarized luminescence in molecular recognition systems: Recent achievements. Chirality 2023; 35:92-103. [PMID: 36477924 DOI: 10.1002/chir.23522] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/21/2022] [Accepted: 11/24/2022] [Indexed: 12/12/2022]
Abstract
Circularly polarized luminescence (CPL) dyes are recognized to be new generation materials and have been actively developed. Molecular recognition systems provide nice approaches to novel CPL materials, such as stimuli-responsive switches and chemical sensing materials. CPL may be induced simply by mixing chiral or achiral, luminescent or nonluminescent host and guest; there are several combinations. Molecular recognition can potentially save time and effort to construct well-ordered chiral structures with noncovalent attractive interactions as compared with the multi-step synthesis of covalently bonded dyes. It is a challenging subject to engage molecular recognition events with CPL, and it is important and interesting to see how it is achieved. In fact, simple molecular recognition systems can even enable the fine adjustment of CPL performance and detailed conformational/configurational analysis of the excited state. Here we overview the recent achievements of simple host-guest complexes capable of exhibiting CPL, summarizing concisely the host/guest structures, CPL intensities, and characteristics.
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Affiliation(s)
- Kazuto Takaishi
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Chihiro Maeda
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Tadashi Ema
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
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12
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Hu R, Yuan Y, Gu M, Zou YQ. Recent advances in chiral aggregation-induced emission fluorogens. ENGINEERED REGENERATION 2022. [DOI: 10.1016/j.engreg.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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13
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Nakano K, Takase K, Noguchi K. Furan-Containing Chiral Spiro-Fused Polycyclic Aromatic Compounds: Synthesis and Photophysical Properties. Molecules 2022; 27:molecules27165103. [PMID: 36014343 PMCID: PMC9415352 DOI: 10.3390/molecules27165103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 11/16/2022] Open
Abstract
Spiro-fused polycyclic aromatic compounds (PACs) have received growing interest as rigid chiral scaffolds. However, furan-containing spiro-fused PACs have been quite limited. Here, we design spiro[indeno[1,2-b][1]benzofuran-10,10′-indeno[1,2-b][1]benzothiophene] as a new family of spiro-fused PACs that contains a furan unit. The compound was successfully synthesized in enantiopure form and also transformed to its S,S-dioxide derivative and the pyrrole-containing analog via aromatic metamorphosis. The absorption and emission properties of the obtained furan-containing chiral spiro-fused PACs are apparently different from those of their thiophene analogs that have been reported, owing to the increased electron-richness of furan compared to thiophene. All of the furan-containing chiral spiro-fused PACs were found to be circularly polarized luminescent materials.
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Affiliation(s)
- Koji Nakano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
- Correspondence: ; Tel.: +81-42-388-7162
| | - Ko Takase
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Keiichi Noguchi
- Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
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14
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Omasa K, Ito M, Kubo Y. Zn( ii)-coordination-driven chiroptical and emissive sensing for chiral amines using a quaterphenyl-5′-carbaldehyde. NEW J CHEM 2022. [DOI: 10.1039/d2nj04781k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The formation of an imine between 1 and chiral amine analyte enabled Zn(ii)-assisted CD response, fluorescence and CPL signals.
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Affiliation(s)
- Koichiro Omasa
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Masato Ito
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Yuji Kubo
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan
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Freytag E, Holzapfel M, Swain A, Bringmann G, Stolte M, Würthner F, Lambert C. Axially chiral indolenine derived chromophore dimers and their chiroptical absorption and emission properties. Chem Sci 2022; 13:12229-12238. [PMID: 36349102 PMCID: PMC9601394 DOI: 10.1039/d2sc04600h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/05/2022] [Indexed: 11/23/2022] Open
Abstract
Yamamoto homocoupling of two chiral oxindoles led to the atropo-diastereoselective formation of an axially chiral oxindole dimer. This building block served as the starting material for the syntheses of axially chiral squaraine and merocyanine chromophore dimers. These dimers show pronounced chiroptical properties, this is, outstandingly high ECD signals (Δε up to ca. 1500 M−1 cm−1) as a couplet with positive Cotton effect for the P-configuration around the biaryl axis and a negative Cotton effect for the M-configuration. All investigated dimers also exhibit pronounced circularly polarised emission with anisotropy values of ca. 10−3 cgs. Time-dependent density functional calculations were used to analyse the three contributions (local one electron, electric–magnetic coupling, and exciton coupling) to the rotational strength applying the Rosenfeld equation to excitonically coupled chromophores. While the exciton coupling term proves to be the dominant one, the electric–magnetic coupling possesses the same sign and adds significantly to the total rotational strength owing to a favourable geometric arrangement of the two chromophores within the dimer. From an axially chiral oxindole, squaraine and merocyanine chromophore dimers with pronounced chiroptical properties were prepared.![]()
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Affiliation(s)
- Emely Freytag
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Marco Holzapfel
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Asim Swain
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Gerhard Bringmann
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Matthias Stolte
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
- Center for Nanosystems Chemistry, Universität Würzburg, Theodor-Boveri-Weg, Würzburg 97074, Germany
| | - Frank Würthner
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
- Center for Nanosystems Chemistry, Universität Würzburg, Theodor-Boveri-Weg, Würzburg 97074, Germany
| | - Christoph Lambert
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
- Center for Nanosystems Chemistry, Universität Würzburg, Theodor-Boveri-Weg, Würzburg 97074, Germany
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