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Hayashi K, Hirata S. High-Resolution Afterglow Patterning Using Cooperative Vapo- and Photo-Stimulation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308103. [PMID: 38018335 DOI: 10.1002/smll.202308103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/28/2023] [Indexed: 11/30/2023]
Abstract
Bright afterglow room-temperature phosphorescence (RTP) soon after ceasing excitation is a promising technique for greatly increasing anti-counterfeiting capabilities. The development of a process for rapid high-resolution afterglow patterning of crystalline materials can improve both high-speed fabrication of anti-counterfeiting afterglow media and stable afterglow readout compared with those achieved with amorphous materials. Here, the high-resolution afterglow patterning of crystalline materials via cooperative organic vapo- and photo-stimulation is reported. A single crystal of (S)-(-)-2,2'-bis(diphenylphosphino)-5,5',6,6',7,7'8,8'-octahydro-1,1'-binaphthyl [(S)-H8-BINAP] doped with (S)-(-)-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl [(S)-BINAP] shows green afterglow RTP. Crystals of (S)-BINAP-doped (S)-H8-BINAP changed to an amorphous state with no afterglow capability on weak continuous photoirradiation under dichloromethane (DCM) vapor. Photoirradiation induced oxidation of the (S)-H8-BINAP host molecule in the crystal. The oxidized (S)-H8-BINAP forms on the crystal surface strongly interacted with DCM molecules, which induces melting of the (S)-BINAP-doped (S)-H8-BINAP crystal and trigger formation of an amorphous state without an afterglow capability. High-resolution afterglow patterning of the crystalline film is rapidly achieved by using cooperative organic vapo- and photo-stimulation. In addition to the benefit of rapid afterglow patterning, the formed afterglow images of the crystalline film can be repeatedly read out under ambient conditions without DCM vapor.
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Affiliation(s)
- Kikuya Hayashi
- Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
| | - Shuzo Hirata
- Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
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2
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Badriyah EH, Hayashi K, Sk B, Takano R, Ishida T, Hirata S. Continuous Condensed Triplet Accumulation for Irradiance-Induced Anticounterfeit Afterglow. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304374. [PMID: 37897314 PMCID: PMC10754144 DOI: 10.1002/advs.202304374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/25/2023] [Indexed: 10/30/2023]
Abstract
Afterglow room-temperature emission that is independent of autofluorescence after ceasing excitation is a promising technology for state-of-the-art bioimaging and security devices. However, the low brightness of the afterglow emission is a current limitation for using such materials in a variety of applications. Herein, the continuous formation of condensed triplet excitons for brighter afterglow room-temperature phosphorescence is reported. (S)-(-)-2,2'-Bis(diphenylphosphino)-1,1'-binaphthyl ((S)-BINAP) incorporated in a crystalline host lattice showed bright green afterglow room-temperature phosphorescence under strong excitation. The small triplet-triplet absorption cross-section of (S)-BINAP in the whole range of visible wavelengths greatly suppressed the deactivation caused by Förster resonance energy transfer from excited states of (S)-BINAP to the accumulated triplet excitons of (S)-BINAP under strong continuous excitation. The steady-state concentration of the triplet excitons for (S)-BINAP reached 2.3 × 10-2 M, producing a bright afterglow. Owing to the brighter afterglow, afterglow detection using individual particles with sizes approaching the diffraction limit in aqueous conditions and irradiance-dependent anticounterfeiting can be achieved.
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Affiliation(s)
- Ende Hopsah Badriyah
- Department of Engineering ScienceThe University of Electro‐Communications1‐5‐1 ChofugaokaChofuTokyo182–8585Japan
| | - Kikuya Hayashi
- Department of Engineering ScienceThe University of Electro‐Communications1‐5‐1 ChofugaokaChofuTokyo182–8585Japan
| | - Bahadur Sk
- Department of Engineering ScienceThe University of Electro‐Communications1‐5‐1 ChofugaokaChofuTokyo182–8585Japan
| | - Rina Takano
- Department of Engineering ScienceThe University of Electro‐Communications1‐5‐1 ChofugaokaChofuTokyo182–8585Japan
| | - Takayuki Ishida
- Department of Engineering ScienceThe University of Electro‐Communications1‐5‐1 ChofugaokaChofuTokyo182–8585Japan
| | - Shuzo Hirata
- Department of Engineering ScienceThe University of Electro‐Communications1‐5‐1 ChofugaokaChofuTokyo182–8585Japan
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3
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Sk B, Hirata S. Förster resonance energy transfer involving the triplet state. Chem Commun (Camb) 2023; 59:6643-6659. [PMID: 37139987 DOI: 10.1039/d3cc00748k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Triplet harvesting is important for high-efficiency optoelectronics devices, time-resolved bioimaging, sensing, and anti-counterfeiting devices. Förster resonance energy transfer (FRET) from the donor (D) to the acceptor (A) is important to efficiently harvest the triplet excitons after a variety of excitations. However, general explanations of the key factors of FRET from the singlet state (FRETS-S) via reverse intersystem crossing and FRET from the triplet state (FRETT-S) have not been reported beyond spectral overlap between emission of the D and absorption of the A. This feature article gives an overview of FRET involving the triplet state. After discussing the contribution of the radiation yield from the state of the D considering spin-forbidden factors of FRET, a variety of schemes involving triplet states, such as FRETS-Svia reverse intersystem crossing from the triplet state, dual FRETS-S and FRETT-S, and selective FRETT-S, are introduced. Representative examples, including the chemical structure and FRET for triplet harvesting, are highlighted using emerging applications in optoelectronics and afterglow imaging. Finally, recent developments of using FRET involving triplet states for high-efficiency optoelectronic devices and time-resolved bioimaging are discussed. This article provides crucial information for controlling state-of-the-art properties using FRET involving the triplet state.
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Affiliation(s)
- Bahadur Sk
- Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
| | - Shuzo Hirata
- Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
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Khrebtov AA, Fedorenko EV, Beloliptsev AY, Mirochnik AG. Polymer films doped with boron difluoride ortho-hydroxydibenzoylmethanates: Solvatochromism and solvent-induced exciplex formation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 267:120548. [PMID: 34742150 DOI: 10.1016/j.saa.2021.120548] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 09/23/2021] [Accepted: 10/24/2021] [Indexed: 06/13/2023]
Abstract
The spectral properties and solvatochromic behavior of boron difluoride ortho-hydroxydibenzoylmethanates in polymer matrices with different polarity (polystyrene, polyvinyl chloride, polycarbonate, poly(methyl methacrylate)) were investigated. The specific interaction of polystyrene, polycarbonate and poly(methyl methacrylate) with the investigated fluorophores was revealed. It was shown that the dyes are capable to form exciplexes with phenyl rings of polystyrene. The spectral properties of polystyrene films doped with boron difluoride ortho-hydroxydibenzoylmethanates, which were obtained by the pouring method, significantly depend on the solvent from which they were formed. This makes it possible to control the luminescence color of the films at the manufacturing stage.
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Affiliation(s)
- Aleksandr A Khrebtov
- Institute of Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russian Federation; Far Eastern Federal University, Vladivostok 690091, Russian Federation.
| | - Elena V Fedorenko
- Institute of Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russian Federation.
| | - Anton Yu Beloliptsev
- Institute of Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russian Federation.
| | - Anatolii G Mirochnik
- Institute of Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russian Federation.
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Wang X, Wang G, Li J, Li X, Zhang K. A simple and straightforward polymer post-modification method for wearable difluoroboron β-diketonate luminescent sensors. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124449] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Gao Y, Di X, Wang F, Sun P. Room temperature tunable multicolor phosphorescent polymers for humidity detection and information encryption. RSC Adv 2022; 12:8145-8153. [PMID: 35424729 PMCID: PMC8982396 DOI: 10.1039/d2ra00294a] [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: 01/15/2022] [Accepted: 03/04/2022] [Indexed: 11/21/2022] Open
Abstract
Amorphous polymer-based room temperature phosphorescence (RTP) materials exhibiting tunable emission colors have received tremendous attention and are extremely challenging to prepare. Herein, polyacrylamide-based RTP materials with tunable multicolor emission were prepared via copolymerizing phosphor with concentration dependent luminescence colors and acrylamide with different molar ratios. The hydrogen bonding interactions and chemically crosslinked structures in these polymers effectively restrict the mobility of phosphors and activate efficient RTP emission. The molar ratio of phosphor and acrylamide has a significant influence on the photophysical properties of these polymers, which can be used to fabricate multicolor materials. In addition, the RTP intensity decreases with increasing humidity due to the disassociation of hydrogen bonding by adsorption of water, manifesting as a humidity sensor. Benefiting from the distinguishable RTP lifetimes and the responsiveness to humidity, triple encoding for information encryption is successfully realized. A polymer with tunable multicolor was prepared via copolymerizing a phosphor with concentration dependent luminescence and acrylamide based on chemical crosslinking and hydrogen bonding interactions for humidity detection and information encryption.![]()
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Affiliation(s)
- Yulei Gao
- Key Laboratory of Functional Polymer Materials of Ministry of Education and College of Chemistry, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, P. R. China
| | - Xiang Di
- Key Laboratory of Functional Polymer Materials of Ministry of Education and College of Chemistry, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, P. R. China
| | - Fenfen Wang
- Key Laboratory of Functional Polymer Materials of Ministry of Education and College of Chemistry, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, P. R. China
| | - Pingchuan Sun
- Key Laboratory of Functional Polymer Materials of Ministry of Education and College of Chemistry, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, P. R. China
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Highly sensitive and quantitative biodetection with lipid-polymer hybrid nanoparticles having organic room-temperature phosphorescence. Biosens Bioelectron 2021; 199:113889. [PMID: 34968954 DOI: 10.1016/j.bios.2021.113889] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 02/07/2023]
Abstract
A versatile organic room-temperature phosphorescence (RTP)-based "turn on" biosensor platform has been devised with high sensitivity by combining oxygen-sensitive lipid-polymer hybrid RTP nanoparticles with a signal-amplifying enzymatic oxygen scavenging reaction in aqueous solutions. When integrated with a sandwich-DNA hybridization assay on 96-well plates, our phosphorimetric sensor demonstrates sequence-specific detection of a cell-free cancer biomarker, a TP53 gene fragment, with a sub-picomolar (0.5 p.m.) detection limit. This assay is compatible with detecting cell-free nucleic acids in human urine samples. Simply by re-programming the detection probe, our unique methodology can be adapted to a broad range of biosensor applications for biomarkers of great clinical importance but difficult to detect due to their low abundance in vivo.
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Aguirre-Macías YP, Sánchez-Vergara ME, Monzón-González CR, Cosme I, Corona-Sánchez R, Álvarez-Bada JR, Álvarez-Toledano C. Deposition and post-treatment of promising poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate composite films for electronic applications. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02842-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Bhattacharjee I, Hayashi K, Hirata S. Key of Suppressed Triplet Nonradiative Transition-Dependent Chemical Backbone for Spatial Self-Tunable Afterglow. JACS AU 2021; 1:945-954. [PMID: 34467341 PMCID: PMC8395709 DOI: 10.1021/jacsau.1c00132] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Indexed: 05/21/2023]
Abstract
Highly efficient persistent (lifetime > 0.1 s) room-temperature phosphorescence (pRTP) chromophores are important for futuristic high-resolution afterglow imaging for state-of-the-art security, analytical, and bioimaging applications. Suppression of the radiationless transition from the lowest triplet excited state (T1) of the chromophores is a critical factor to access the high RTP yield and RTP lifetime for desirable pRTP. Logical explanations for factor suppression based on chemical structures have not been reported. Here we clarify a strategy to reduce the radiationless transition from T1 based on chemical backbones and yield a simultaneous high RTP yield and high RTP lifetime. Yellow phosphorescence chromophores that contain a coronene backbone were synthesized and compared with yellow phosphorescent naphthalene. One of the designed coronene derivatives reached a RTP yield of 35%, which is the best value for chromophores with a RTP lifetime of 2 s. The optically measured rate constant of a radiationless transition from T1 was correlated precisely with a multiplication of vibrational spin-orbit coupling (SOC) at a T1 geometry and with the Franck-Condon chromophore factor. The agreement between the experimental and theoretical results confirmed that the extended two-dimensional fused structure in the coronene backbone contributes to a decrease in vibrational SOC and Franck-Condon factor between T1 and the ground state to decrease the radiationless transition. A resolution-tunable afterglow that depends on excitation intensity for anticounterfeit technology was demonstrated, and the resultant chromophores with a high RTP yield and high RTP lifetime were ideal for largely changing the resolution using weak excitation light.
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10
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Phosphorescence-based ratiometric probes: Design, preparation and applications in sensing, imaging and biomedicine therapy. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213694] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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11
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Collot M. Recent advances in dioxaborine-based fluorescent materials for bioimaging applications. MATERIALS HORIZONS 2021; 8:501-514. [PMID: 34821266 DOI: 10.1039/d0mh01186j] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Fluorescent materials are continuously contributing to important advances in the field of bioimaging. Among these materials, dioxaborine-based fluorescent materials (DBFM) are arousing growing interest. Due to their rigid structures conferred by a cyclic boron complex, DBFM possess appealing photophysical properties including high extinction coefficients and quantum yields as well as emission in the near infrared, enhanced photostability and high two-photon absorption. We herein discuss the recent advances of DBFM that found use in bioimaging applications. This review covers the development of fluorescent molecular probes for biomolecules (DNA, proteins), small molecules (cysteine, H2O2, oxygen), ions and the environment (polarity, viscosity) as well as polymers and nanomaterials used in bioimaging. This review aims at providing a comprehensive and critical insight on DBFM by highlighting the assets of these promising materials in bioimaging but also by pointing out their limitations that would require further developments.
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Affiliation(s)
- Mayeul Collot
- Laboratoire de Bioimagerie et Pathologies, UMR 7021, CNRS/Université de Strasbourg, 74 route du Rhin, 67401 Illkirch-Graffenstaden, France.
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Bhattacharjee I, Hirata S. Highly Efficient Persistent Room-Temperature Phosphorescence from Heavy Atom-Free Molecules Triggered by Hidden Long Phosphorescent Antenna. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001348. [PMID: 32596857 DOI: 10.1002/adma.202001348] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/01/2020] [Indexed: 05/27/2023]
Abstract
Persistent (lifetime > 100 ms) room-temperature phosphorescence (pRTP) is important for state-of-the-art security and bioimaging applications. An unclear relationship between chromophores and physical parameters relating to pRTP has prevented obtaining an RTP yield of over 50% and a lifetime over 1 s. Here highly efficient pRTP is reported under ambient conditions from heavy atom-free chromophores. A heavy atom-free aromatic core substituted with a long-conjugated amino group considerably accelerates the phosphorescence rate independent of the intramolecular vibration-based nonradiative rate from the lowest excited triplet state. One of the designed heavy atom-free dopant chromophores presents an RTP yield of 50% with a lifetime of 1 s under ambient conditions. The afterglow brightness under strong excitation is at least 104 times stronger than that of conventional long-persistent luminescence emitters. Here it is shown that highly efficient pRTP materials allow for high-resolution gated emission with a size of the diffraction limit using small-scale and low-cost photodetectors.
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Affiliation(s)
- Indranil Bhattacharjee
- Department of Engineering Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
| | - Shuzo Hirata
- Department of Engineering Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
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14
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Modeling of cationic and excited states of γ-substituted boron difluoride acetylacetonates. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Hirata S. Roles of Localized Electronic Structures Caused by π Degeneracy Due to Highly Symmetric Heavy Atom-Free Conjugated Molecular Crystals Leading to Efficient Persistent Room-Temperature Phosphorescence. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019. [PMID: 31380211 PMCID: PMC6661930 DOI: 10.1002/advs.201970085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Conjugated molecular crystals with persistent room-temperature phosphorescence (RTP) are promising materials for sensing, security, and bioimaging applications. However, the electronic structures that lead to efficient persistent RTP are still unclear. Here, the electronic structures of tetraphenylmethane (C(C6H5)4), tetraphenylsilane (Si(C6H5)4), and tetraphenylgermane (Ge(C6H5)4) showing blue-green persistent RTP under ambient conditions are investigated. The persistent RTP of the crystals originates from minimization of triplet exciton quenching at room temperature not suppression of molecular vibrations. Localization of the highest occupied molecular orbitals (HOMOs) of the steric and highly symmetric conjugated crystal structures decreases the overlap of intermolecular HOMOs, minimizing triplet exciton migration, which accelerates defect quenching of triplet excitons. The localization of the HOMOs over the highly symmetric conjugated structures also induces moderate charge-transfer characteristics between high-order singlet excited states (S m ) and the ground state (S0). The combination of the moderate charge-transfer characteristics of the S m -S0 transition and local-excited state characteristics between the lowest excited triplet state and S0 accelerates the phosphorescence rate independent of the vibration-based nonradiative decay rate from the triplet state at room temperature. Thus, the decrease of triplet quenching and increase of phosphorescence rate caused by the HOMO localization contribute to the efficient persistent RTP of Ge(C6H5)4 crystals.
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Affiliation(s)
- Shuzo Hirata
- Department of Engineering Science University of Electro-Communications 1-5-1 Chofugaoka Chofu Tokyo 182-8585 Japan
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16
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Hirata S. Roles of Localized Electronic Structures Caused by π Degeneracy Due to Highly Symmetric Heavy Atom-Free Conjugated Molecular Crystals Leading to Efficient Persistent Room-Temperature Phosphorescence. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900410. [PMID: 31380211 PMCID: PMC6661950 DOI: 10.1002/advs.201900410] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 03/21/2019] [Indexed: 05/05/2023]
Abstract
Conjugated molecular crystals with persistent room-temperature phosphorescence (RTP) are promising materials for sensing, security, and bioimaging applications. However, the electronic structures that lead to efficient persistent RTP are still unclear. Here, the electronic structures of tetraphenylmethane (C(C6H5)4), tetraphenylsilane (Si(C6H5)4), and tetraphenylgermane (Ge(C6H5)4) showing blue-green persistent RTP under ambient conditions are investigated. The persistent RTP of the crystals originates from minimization of triplet exciton quenching at room temperature not suppression of molecular vibrations. Localization of the highest occupied molecular orbitals (HOMOs) of the steric and highly symmetric conjugated crystal structures decreases the overlap of intermolecular HOMOs, minimizing triplet exciton migration, which accelerates defect quenching of triplet excitons. The localization of the HOMOs over the highly symmetric conjugated structures also induces moderate charge-transfer characteristics between high-order singlet excited states (S m ) and the ground state (S0). The combination of the moderate charge-transfer characteristics of the S m -S0 transition and local-excited state characteristics between the lowest excited triplet state and S0 accelerates the phosphorescence rate independent of the vibration-based nonradiative decay rate from the triplet state at room temperature. Thus, the decrease of triplet quenching and increase of phosphorescence rate caused by the HOMO localization contribute to the efficient persistent RTP of Ge(C6H5)4 crystals.
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Affiliation(s)
- Shuzo Hirata
- Department of Engineering ScienceUniversity of Electro‐Communications1‐5‐1 ChofugaokaChofuTokyo182‐8585Japan
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Gelfand N, Freidzon A, Vovna V. Theoretical insights into UV-Vis absorption spectra of difluoroboron β-diketonates with an extended π system: An analysis based on DFT and TD-DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 216:161-172. [PMID: 30897377 DOI: 10.1016/j.saa.2019.02.064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/26/2018] [Accepted: 02/17/2019] [Indexed: 06/09/2023]
Abstract
The UV-Vis absorption spectra of difluoroboron β-diketonates with aromatic substituents at the β-carbon are studied thoroughly using DFT and TD-DFT with the CAM-B3LYP functional. The complicated experimental spectra of these dyes can be correctly interpreted by considering their structural features. A closer look at the calculated data shows that the conformational flexibility of these compounds markedly influences their spectral shape. For the complexes with an extended π system, several conformers with significantly different absorption spectra are present in the equilibrium mixture in solution. Introducing a donor group alters the electronic structure of the complexes, so the charge distribution asymmetry in the molecules increases and the nature of the electronic transitions changes. Thus, both types of substituents, aromatic and donor ones, affect the spectral shape. Understanding their roles may help one to explain the absorption spectra of these and similar compounds and predict their response to analytes and other factors.
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Affiliation(s)
- Natalia Gelfand
- School of Natural Sciences, Far Eastern Federal University, ul. Sukhanova 8, Vladivostok 690091, Russia.
| | - Alexandra Freidzon
- Photochemistry Center of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, ul. Novatorov 7a, Moscow 119421, Russia; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye shosse 31, Moscow 115409, Russia
| | - Vitaliy Vovna
- School of Natural Sciences, Far Eastern Federal University, ul. Sukhanova 8, Vladivostok 690091, Russia
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Zhang H, Yan Y, Qiao G, Li J. Multi-emissive room temperature phosphorescence of a two-dimensional metal-organic framework. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.03.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Tikhonov SA, Fedorenko EV, Mirochnik AG, Osmushko IS, Skitnevskaya AD, Trofimov AB, Vovna VI. Spectroscopic and quantum chemical study of difluoroboron β-diketonate luminophores: Isomeric acetylnaphtholate chelates. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 214:67-78. [PMID: 30769153 DOI: 10.1016/j.saa.2019.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/23/2019] [Accepted: 02/02/2019] [Indexed: 06/09/2023]
Abstract
The electronic structure and optical properties of the isomeric difluoroboron β-diketonates, 2,2-difluoro-4-methylnaphtho-[2,1-e]-1,3,2-dioxaborin (I) and 2,2-difluoro-4-methylnaphtho-[1,2-e]-1,3,2-dioxaborin (II), were studied by means of X-ray photoelectron, absorption and luminescence spectroscopies. The experimental results were interpreted using high-level ab initio quantum chemical computations, including the algebraic-diagrammatic construction method for the polarization propagator of the second and third orders (ADC(2) and ADC(3)), the outer-valence Green's function (OVGF) method, and the time-dependent density functional (TDDFT) approach. The X-ray photoelectron measurements were assigned in the entire energy range using the results of the Kohn-Sham orbital calculations which employed the B3LYP functional. Pronounced hypsochromic shift of crystal-state fluorescence was observed in I upon the lowering of temperature, which can be explained by the deterioration of the conditions for excimers formation. According to our results, remarkable feature of II, absent in I, is its phosphorescence at room temperature. Basing on our calculations, a decay mechanism for the S1 state was proposed, explaining the observed differences in the phosphorescence of I and II.
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Affiliation(s)
- Sergey A Tikhonov
- Far Eastern Federal University, School of Natural Sciences, Vladivostok 690950, Russian Federation.
| | - Elena V Fedorenko
- Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russian Federation
| | - Anatolii G Mirochnik
- Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russian Federation
| | - Ivan S Osmushko
- Far Eastern Federal University, School of Natural Sciences, Vladivostok 690950, Russian Federation
| | - Anna D Skitnevskaya
- Irkutsk State University, Laboratory of Quantum Chemistry, Irkutsk 664003, Russian Federation
| | - Alexander B Trofimov
- Irkutsk State University, Laboratory of Quantum Chemistry, Irkutsk 664003, Russian Federation; Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk 664033, Russian Federation
| | - Vitaliy I Vovna
- Far Eastern Federal University, School of Natural Sciences, Vladivostok 690950, Russian Federation
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20
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Narushima K, Kiyota Y, Mori T, Hirata S, Vacha M. Suppressed Triplet Exciton Diffusion Due to Small Orbital Overlap as a Key Design Factor for Ultralong-Lived Room-Temperature Phosphorescence in Molecular Crystals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1807268. [PMID: 30633401 DOI: 10.1002/adma.201807268] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/18/2018] [Indexed: 06/09/2023]
Abstract
Persistent room-temperature phosphorescence (RTP) under ambient conditions is attracting attention due to its strong potential for applications in bioimaging, sensing, or optical recording. Molecular packing leading to a rigid crystalline structure that minimizes nonradiative pathways from triplet state is often investigated for efficient RTP. However, for complex conjugated systems a key strategy to suppress the nonradiative deactivation is not found yet. Here, the origin of small rates of a nonradiative decay process from triplet states of conjugated molecular crystals showing RTP is reported. Optical microscopy analysis showed that, despite a favorable molecular stacking, an aromatic crystal with strong RTP is characterized by small diffusion length and small values of the diffusion coefficient of triplet excitons. Quantum chemical calculations reveal a large overlap between the lowest unoccupied molecular orbitals but very small overlap between the highest occupied molecular orbitals (HOMOs). Inefficient electron exchange caused by the small overlap of HOMOs prevents triplet excitons from diffusing over long distances and consequently from quenching at defect sites inside the crystal or at the crystal surface. These results will allow design of comprehensive molecular structures to obtain molecular solids with more efficient RTP.
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Affiliation(s)
- Kaishi Narushima
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-S8-44, Meguro-ku, Tokyo, 152-8552, Japan
| | - Yasuhiro Kiyota
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-S8-44, Meguro-ku, Tokyo, 152-8552, Japan
| | - Takehiko Mori
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-S8-44, Meguro-ku, Tokyo, 152-8552, Japan
| | - Shuzo Hirata
- Department of Engineering Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
| | - Martin Vacha
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-S8-44, Meguro-ku, Tokyo, 152-8552, Japan
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21
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Shi H, Song L, Ma H, Sun C, Huang K, Lv A, Ye W, Wang H, Cai S, Yao W, Zhang Y, Zheng R, An Z, Huang W. Highly Efficient Ultralong Organic Phosphorescence through Intramolecular-Space Heavy-Atom Effect. J Phys Chem Lett 2019; 10:595-600. [PMID: 30672299 DOI: 10.1021/acs.jpclett.8b03712] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Metal-free organic phosphorescent materials have attracted considerable attention in the fields of organic electronics and bioelectronics. However, it remains a great challenge to achieve organic phosphors with high quantum efficiency in a single-component system. We designed and synthesized two organic phosphors (PDCz and PDBCz) with an ultralong organic phosphorescence (UOP) feature. Both molecules showed ultralong emission lifetime of >200 ms. For PDBCz crystal, it was found that the absolute phosphorescence quantum efficiency reaches up to 38.1%. Combining the experimental and theoretical studies, the highly efficient UOP was mainly attributed to the intramolecular space heavy-metal effect, which facilitates the spin-orbit coupling between singlet and triplet excited states to effectively promote the intersystem crossing. This study will provide a new platform to rationally design highly efficient UOP materials and show its potential in the field of flexible electronics.
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Affiliation(s)
- Huifang Shi
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Lulu Song
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Huili Ma
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Chen Sun
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Kaiwei Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Anqi Lv
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Wenpeng Ye
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - He Wang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Suzhi Cai
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Wei Yao
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Yujian Zhang
- Department of Materials Chemistry , Huzhou University , East 2nd Ring Road, No. 759 , Huzhou 313000 , China
| | - Ruilin Zheng
- College of Electronic and Optical Engineering , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , China
| | - Zhongfu An
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
- Shaanxi Institute of Flexible Electronics (SIFE) , Northwestern Polytechnical University (NPU) , 127 West Youyi Road , Xi'an 710072 , China
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22
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Huang W, Zhang X, Chen B, Miao H, Trindle CO, Wang Y, Luo Y, Zhang G. Boosting the triplet activity of heavy-atom-free difluoroboron dibenzoylmethane via sp3 oxygen-bridged electron donors. Chem Commun (Camb) 2019; 55:67-70. [DOI: 10.1039/c8cc08346k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Boosting triplet activity by introducing an electron donor in BF2dbm proved the charge-transfer mediated ISC process in the oxygen-bridged donor-sp3-acceptor systems.
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Affiliation(s)
- Wenhuan Huang
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- China
| | - Xuepeng Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- China
| | - Biao Chen
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- China
| | - Hui Miao
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- China
| | - Carl O. Trindle
- Department of Chemistry
- University of Virginia
- Charlottesville
- USA
| | - Yucai Wang
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- China
| | - Yi Luo
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- China
| | - Guoqing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- China
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23
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Huang L, Chen B, Zhang X, Trindle CO, Liao F, Wang Y, Miao H, Luo Y, Zhang G. Proton‐Activated “Off–On” Room‐Temperature Phosphorescence from Purely Organic Thioethers. Angew Chem Int Ed Engl 2018; 57:16046-16050. [DOI: 10.1002/anie.201808861] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 10/16/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Linkun Huang
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Biao Chen
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Xuepeng Zhang
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Carl O. Trindle
- Department of ChemistryUniversity of Virginia Charlottesville VA 22903 USA
| | - Fan Liao
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Yucai Wang
- School of Life ScienceUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Hui Miao
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Yi Luo
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Guoqing Zhang
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
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24
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Huang L, Chen B, Zhang X, Trindle CO, Liao F, Wang Y, Miao H, Luo Y, Zhang G. Proton‐Activated “Off–On” Room‐Temperature Phosphorescence from Purely Organic Thioethers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808861] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Linkun Huang
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Biao Chen
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Xuepeng Zhang
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Carl O. Trindle
- Department of ChemistryUniversity of Virginia Charlottesville VA 22903 USA
| | - Fan Liao
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Yucai Wang
- School of Life ScienceUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Hui Miao
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Yi Luo
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
| | - Guoqing Zhang
- Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China 96 Jinzhai Rd Hefei Anhui 230026 China
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25
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Hirata S. Intrinsic Analysis of Radiative and Room-Temperature Nonradiative Processes Based on Triplet State Intramolecular Vibrations of Heavy Atom-Free Conjugated Molecules toward Efficient Persistent Room-Temperature Phosphorescence. J Phys Chem Lett 2018; 9:4251-4259. [PMID: 29979876 DOI: 10.1021/acs.jpclett.8b01711] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The radiative rate ( kp) of the lowest triplet excited state (T1) and the nonradiative rate based on intramolecular vibrations at room temperature [ knr(RT)] from T1 for heavy atom-free conjugated structures are determined by considering the triplet yield and quenching rate from T1. Donor substitution did not strongly influence knr(RT) but greatly enhanced kp. The knr(RT) values were comparable between donor-substituted molecules and nonsubstituted molecules, which we explain by similar vibrational spin-orbit coupling (SOC) related to the transition from T1 to the ground state (S0). We attribute the enhancement of kp induced by donor substitution to the appearance of a large SOC between high-order singlet excited states (Sm) and T1 together with the large transition dipole moments of the Sm-S0 transitions. Knowledge of this mechanism is important for developing future efficient persistent room-temperature phosphorescence from doped aromatic materials and aromatic crystals.
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Affiliation(s)
- Shuzo Hirata
- Department of Engineering Science and Engineering , The University of Electro-Communications , 1-5-1 Chofugaoka , Chofu , Tokyo 182-8585 , Japan
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26
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Tikhonov SA, Vovna VI. Boron chelate complexes: X-ray and UV photoelectron spectra and electronic structure. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2196-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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27
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Tikhonov SA, Svistunova IV, Samoilov IS, Osmushko IS, Borisenko AV, Vovna VI. Electronic structure of binuclear acetylacetonates of boron difluoride. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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28
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Sun C, Ran X, Wang X, Cheng Z, Wu Q, Cai S, Gu L, Gan N, Shi H, An Z, Shi H, Huang W. Twisted Molecular Structure on Tuning Ultralong Organic Phosphorescence. J Phys Chem Lett 2018; 9:335-339. [PMID: 29298070 DOI: 10.1021/acs.jpclett.7b02953] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Compared to planar carbazole, the molecular conjugation of iminodibenzyl (Id) was destroyed by a C-C bond and a twisted structure was formed, which exhibited blue-shifted ultralong phosphorescence with a lifetime of 402 ms in a crystal under ambient conditions. For the presence of an oscillating C-C bond between the two benzene rings in Id, more than one molecular configuration in the crystal was discovered by X-ray single-crystal analysis. Moreover, its ultralong phosphorescence color changed from blue to green by varying the excitation wavelength in solution at 77 K. Theoretical calculations also confirmed that different molecular configurations had certain impact on the phosphorescent photophysical properties. This result will allow a major step forward in expanding the scope of ultralong organic phosphorescent (UOP) materials, building a bridge to realize the relationship between molecular structure and UOP property.
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Affiliation(s)
- Chen Sun
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Xueqin Ran
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Xuan Wang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Zhichao Cheng
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Qi Wu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Suzhi Cai
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Long Gu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Nan Gan
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Huixian Shi
- School of Materials Science and Engineering, Taiyuan University of Technology , Taiyuan 030024, China
| | - Zhongfu An
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
| | - Huifang Shi
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
- Key Laboratory for Organic Electronics & Information Displays (KLOEID), and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications , Wenyuan Road 9, Nanjing 210023, China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, People's Republic of China
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU) , 127 West Youyi Road, Xi'an 710072, China
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29
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Tikhonov SA, Vovna VI, Osmushko IS, Fedorenko EV, Mirochnik AG. Boron difluoride dibenzoylmethane derivatives: Electronic structure and luminescence. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 189:563-570. [PMID: 28866412 DOI: 10.1016/j.saa.2017.08.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 08/06/2017] [Accepted: 08/19/2017] [Indexed: 06/07/2023]
Abstract
Electronic structure and optical properties of boron difluoride dibenzoylmethanate and four of its derivatives have been studied by X-ray photoelectron spectroscopy, absorption and luminescence spectroscopy and quantum chemistry (DFT, TDDFT). The relative quantum luminescence yields have been revealed to correlate with charge transfers of HOMO-LUMO transitions, energy barriers of aromatic substituents rotation and the lifetime of excited states in the investigated complexes. The bathochromic shift of intensive bands in the optical spectra has been observed to occur when the functional groups are introduced into p-positions of phenyl cycles due to destabilizing HOMO levels. Calculated energy intervals between electronic levels correlate well with XPS spectra structure of valence and core electrons.
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Affiliation(s)
| | | | | | - Elena V Fedorenko
- Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russia
| | - Anatoliy G Mirochnik
- Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russia
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30
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Liu T, Zhang G, Evans RE, Trindle CO, Altun Z, DeRosa CA, Wang F, Zhuang M, Fraser CL. Phosphorescence Tuning through Heavy Atom Placement in Unsymmetrical Difluoroboron β‐Diketonate Materials. Chemistry 2018; 24:1859-1869. [DOI: 10.1002/chem.201703513] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Tiandong Liu
- Department of Chemistry University of Virginia McCormick Road Charlottesville VA 22904 USA
| | - Guoqing Zhang
- Department of Chemistry University of Virginia McCormick Road Charlottesville VA 22904 USA
- Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei, Anhui 230026 P. R. China
| | - Ruffin E. Evans
- Department of Chemistry University of Virginia McCormick Road Charlottesville VA 22904 USA
- Department of Physics Harvard University Cambridge MA 02138 USA
| | - Carl O. Trindle
- Department of Chemistry University of Virginia McCormick Road Charlottesville VA 22904 USA
| | - Zikri Altun
- Department of Physics Marmara University Göztepe Kampus Istanbul 34772 Turkey
| | - Christopher A. DeRosa
- Department of Chemistry University of Virginia McCormick Road Charlottesville VA 22904 USA
| | - Fang Wang
- Department of Chemistry University of Virginia McCormick Road Charlottesville VA 22904 USA
| | - Meng Zhuang
- Department of Chemistry University of Virginia McCormick Road Charlottesville VA 22904 USA
| | - Cassandra L. Fraser
- Department of Chemistry University of Virginia McCormick Road Charlottesville VA 22904 USA
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31
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32
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Ohtani S, Gon M, Tanaka K, Chujo Y. A Flexible, Fused, Azomethine-Boron Complex: Thermochromic Luminescence and Thermosalient Behavior in Structural Transitions between Crystalline Polymorphs. Chemistry 2017. [DOI: 10.1002/chem.201702309] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Shunsuke Ohtani
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Masayuki Gon
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
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33
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Suenaga K, Tanaka K, Chujo Y. Design and Luminescence Chromism of Fused Boron Complexes Having Constant Emission Efficiencies in Solution and in the Amorphous and Crystalline States. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700704] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Kazumasa Suenaga
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku 615-8510 Kyoto Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku 615-8510 Kyoto Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku 615-8510 Kyoto Japan
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34
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Butler T, Mathew AS, Sabat M, Fraser CL. Camera Method for Monitoring a Mechanochromic Luminescent β-Diketone Dye with Rapid Recovery. ACS APPLIED MATERIALS & INTERFACES 2017; 9:17603-17612. [PMID: 28485954 DOI: 10.1021/acsami.7b01985] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mechanochromic luminescent (ML) materials, which show a change in emission due to an applied mechanical stimulus, are useful components in a variety of applications, including organic light-emitting diodes, force sensors, optical memory storage, and next-generation lighting materials. While there are many different ML active derivatives, few show room temperature self-erasing. Thin films of the methoxy substituted β-diketone, gbmOMe, initially exhibited blue (428 nm) emission; however, green (478 nm) emission was observed after smearing. The mechanically generated smeared state recovered so rapidly that characterization of its emission was difficult at room temperature using traditional luminescence techniques. Thus, a new complementary metal oxide semiconductor camera imaging method was developed and used to calculate the decay time of the mechanically generated smeared state (i.e., smeared-state decay; τSM) for gbmOMe thin films. Additionally, this method was used to evaluate substrate and film thickness effects on ML recovery for glass and weighing paper films. The recovery behavior of gbmOMe was largely substrate-independent for the indicated matrixes; however, thickness effects were observed. Thus, film thickness may be the main factor in determining ML recovery behavior and must be accounted for when comparing the recovery dynamics of different ML materials. Moreover, when heated above the melting point (Tm = 119 °C), bulk gbmOMe powders assumed a metastable state that eventually crystallized after a few minutes at room temperature. However, melted thin films remained in an amorphous state indefinitely despite annealing at different temperatures (50-110 °C). The amorphous phase was identified as a supercooled liquid via changing the rate of cooling in differential scanning calorimetry thermograms.
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Affiliation(s)
| | | | - Michal Sabat
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
- Department of Materials Science and Engineering, University of Virginia , 395 McCormick Road, Charlottesville, Virginia 22904, United States
| | - Cassandra L Fraser
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
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Kerr C, DeRosa CA, Daly ML, Zhang H, Palmer GM, Fraser CL. Luminescent Difluoroboron β-Diketonate PLA-PEG Nanoparticle. Biomacromolecules 2017; 18:551-561. [PMID: 28150934 DOI: 10.1021/acs.biomac.6b01708] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Luminescent difluoroboron β-diketonate poly(lactic acid) (BF2bdkPLA) materials serve as biological imaging agents. In this study, dye structures were modified to achieve emission colors that span the visible region with potential for multiplexing applications. Four dyes with varying π-conjugation (phenyl, naphthyl) and donor groups (-OMe, -NMe2) were coupled to PLLA-PEG block copolymers (∼11 kDa) by a postpolymerization Mitsunobu reaction. The resulting dye-polymer conjugates were fabricated as nanoparticles (∼55 nm diameter) to produce nanomaterials with a range of emission colors (420-640 nm). For increased stability, dye-PLLA-PEG conjugates were also blended with dye-free PDLA-PEG to form stereocomplex nanoparticles of smaller size (∼45 nm diameter). The decreased dye loading in the stereoblocks blue-shifted the emission, generating a broader range of fluorescence colors (410-620 nm). Tumor accumulation was confirmed in a murine model through biodistribution studies with a red emitting dimethyl amino-substituted dye-polymer analogue. The synthesis, optical properties, oxygen-sensing capabilities, and stability of these block copolymer nanoparticles are presented.
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Affiliation(s)
- Caroline Kerr
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Christopher A DeRosa
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Margaret L Daly
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Hengtao Zhang
- Department of Radiation Oncology, Duke University , Durham, North Carolina 27710, United States
| | - Gregory M Palmer
- Department of Radiation Oncology, Duke University , Durham, North Carolina 27710, United States
| | - Cassandra L Fraser
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
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DeRosa CA, Kolpaczynska M, Kerr C, Daly ML, Morris WA, Fraser CL. Oxygen-Sensing Difluoroboron Thienyl Phenyl β-Diketonate Polylactides. Chempluschem 2016; 82:399-406. [DOI: 10.1002/cplu.201600520] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/17/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Christopher A. DeRosa
- Department of Chemistry; University of Virginia; McCormick Road Charlottesville VA 22904 USA
| | - Milena Kolpaczynska
- Department of Chemistry; University of Virginia; McCormick Road Charlottesville VA 22904 USA
| | - Caroline Kerr
- Department of Chemistry; University of Virginia; McCormick Road Charlottesville VA 22904 USA
| | - Margaret L. Daly
- Department of Chemistry; University of Virginia; McCormick Road Charlottesville VA 22904 USA
| | - William A. Morris
- Department of Chemistry; University of Virginia; McCormick Road Charlottesville VA 22904 USA
| | - Cassandra L. Fraser
- Department of Chemistry; University of Virginia; McCormick Road Charlottesville VA 22904 USA
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Xu S, Chen R, Zheng C, Huang W. Excited State Modulation for Organic Afterglow: Materials and Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:9920-9940. [PMID: 27634285 DOI: 10.1002/adma.201602604] [Citation(s) in RCA: 365] [Impact Index Per Article: 45.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 06/15/2016] [Indexed: 05/23/2023]
Abstract
Organic afterglow materials, developed recently by breaking through the difficulties in modulating ultrafast-decayed excited states, exhibit ultralong-lived emission for persistent luminescence with lifetimes of several orders of magnitude longer than traditional fluorescent and phosphorescent emissions at room temperature. Their exceptional properties, namely ultralong luminescent lifetime, large Stokes shifts, facile excited state transformation, and environmentally sensitive emission, have led to a diverse range of advanced optoelectronic applications. Here, the organic afterglow is reviewed from the perspective of fundamental concepts on both phenomenon and mechanism, examining the technical challenges in relation to excited state tuning and lifetime elongation. In particular, the advances in material design strategies that afford a large variety of organic afterglow materials for a broad utility in optoelectronics including lighting and displays, anti-counterfeiting, optical recording, chemical sensors and bio-imaging are highlighted.
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Affiliation(s)
- Shen Xu
- 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 and Telecommunications (NUPT), Nanjing, 210023, P. R. China
| | - Runfeng Chen
- 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 and Telecommunications (NUPT), Nanjing, 210023, P. R. China
| | - Chao Zheng
- 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 and Telecommunications (NUPT), Nanjing, 210023, P. R. China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, 211816, P. R. China
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DeRosa CA, Seaman SA, Mathew AS, Gorick CM, Fan Z, Demas JN, Peirce SM, Fraser CL. Oxygen Sensing Difluoroboron β-Diketonate Polylactide Materials with Tunable Dynamic Ranges for Wound Imaging. ACS Sens 2016; 1:1366-1373. [PMID: 28042606 DOI: 10.1021/acssensors.6b00533] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Difluoroboron β-diketonate poly(lactic acid) materials exhibit both fluorescence (F) and oxygen sensitive room-temperature phosphorescence (RTP). Introduction of halide heavy atoms (Br and I) is an effective strategy to control the oxygen sensitivity in these materials. A series of naphthyl-phenyl (nbm) dye derivatives with hydrogen, bromide and iodide substituents were prepared for comparison. As nanoparticles, the hydrogen derivative was hypersensitive to oxygen (0-0.3%), while the bromide analogue was suited for hypoxia detection (0-3% O2). The iodo derivative, BF2nbm(I)PLA, showed excellent F to RTP peak separation and an 0-100% oxygen sensitivity range unprecedented for metal-free RTP emitting materials. Due to the dual emission and unconventionally long RTP lifetimes of these O2 sensing materials, a portable, cost-effective camera was used to quantify oxygen levels via lifetime and red/green/blue (RGB) ratiometry. The hypersensitive H dye was well matched to lifetime detection, simultaneous lifetime and ratiometric imaging was possible for the bromide analogue, whereas the iodide material, with intense RTP emission and a shorter lifetime, was suited for RGB ratiometry. To demonstrate the prospects of this camera/material design combination for bioimaging, iodide boron dye-PLA nanoparticles were applied to a murine wound model to detect oxygen levels. Surprisingly, wound oxygen imaging was achieved without covering (i.e. without isolating from ambient conditions, air). Additionally, would healing was monitored via wound size reduction and associated oxygen recovery, from hypoxic to normoxic. These single-component materials provide a simple tunable platform for biological oxygen sensing that can be deployed to spatially resolve oxygen in a variety of environments.
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Affiliation(s)
- Christopher A. DeRosa
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Scott A. Seaman
- Department
of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22908, United States
| | - Alexander S. Mathew
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Catherine M. Gorick
- Department
of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22908, United States
| | - Ziyi Fan
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - James N. Demas
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Shayn M. Peirce
- Department
of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22908, United States
| | - Cassandra L. Fraser
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
- Department
of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22908, United States
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Liu C, Zhang H, Zhao J. Synthesis, characterization and properties of furan-containing difluoroboron complexes. RSC Adv 2016. [DOI: 10.1039/c6ra20489a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
New β-diketonate difluoroboron complexes (F1–F4) containing a furan ring have been developed, and their luminescence properties have been investigated systematically.
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Affiliation(s)
- Chun Liu
- State Key Laboratory of Fine Chemicals
- Dalian Univeristry of Technology
- Dalian 116024
- China
| | - Hao Zhang
- State Key Laboratory of Fine Chemicals
- Dalian Univeristry of Technology
- Dalian 116024
- China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals
- Dalian Univeristry of Technology
- Dalian 116024
- China
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