1
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Li G, Liu Y, Lei D, Li J, Dou X. Amination and Protonation Facilitated Novel Isoxazole Derivative for Highly Efficient Electron and Hole Separation. J Phys Chem A 2024. [PMID: 38656182 DOI: 10.1021/acs.jpca.4c01324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
It is of great importance to understand the intrinsic relationship between phototautomerization and photoelectric properties for the exploration of novel organic materials. Here, in order to chemically control the protonation process, the aminated isoxazole derivative (2,2'-(isoxazolo[5,4-d]isoxazole-3,6-diyl)dibenzenaminium, DP-DA-DPIxz) with -N═ as the proton acceptor was designed to achieve the twisted intramolecular charge transfer (TICT) state which was triggered by an excited-state intramolecular proton transfer (ESIPT) process. This kind of protonation enhanced the intramolecular hydrogen bonding, conjugative effect, and steric hindrance effects, ensuring a barrierless spontaneous TICT process. Through the intramolecular proton transfer, the configuration torsion and conjugation dissociation of the DP-DA-DPIxz molecule was favored, which led to efficient charge separation and remarkable variations in light-emitting properties. We hope the present investigation will provide a new approach to design novel optoelectronic organic materials and shine light on the understanding of the charge transfer and separation process in molecular science.
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Affiliation(s)
- Gaosheng Li
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Yali Liu
- Xinjiang Key Laboratory of Trace Chemical Substances Sensing, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Da Lei
- Xinjiang Key Laboratory of Trace Chemical Substances Sensing, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Jiguang Li
- Xinjiang Key Laboratory of Trace Chemical Substances Sensing, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Xincun Dou
- School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China
- Xinjiang Key Laboratory of Trace Chemical Substances Sensing, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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2
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The suppression of intramolecular charge transfer emission by tautomerism in 2-(4′-amino-2′-hydroxyphenyl)-1H-imidazo-[4,5-c]pyridine: Intramolecular proton transfer versus intermolecular proton transfer. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3
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Das M, Brahma M, Krishnamoorthy G. Light-Driven Switching between Intramolecular Proton-Transfer and Charge-Transfer States. J Phys Chem B 2021; 125:2339-2350. [PMID: 33646785 DOI: 10.1021/acs.jpcb.0c09705] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A molecular photoswitch, 2-(4'-diethylamino-2'-hydroxyphenyl)-1H-imidazo-[4,5-b]pyridine (DHP), with mutually independent paths of excited-state intramolecular proton transfer (ESIPT) and twisted intramolecular charge transfer (TICT) was developed. Control over these processes was attained by switching the solvents. Depending on the solvent's hydrogen-bond capacity and polarity, either one of the photoprocesses (ESIPT or TICT) or both can be triggered. Accordingly, normal and tautomer emissions, normal and TICT emissions, or triple emission of normal, tautomer, and TICT were obtained from the molecule. The emissions were resolved by fluorescence lifetime. The conclusions were established by synthesizing and studying the methoxy derivative of the molecule.
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Affiliation(s)
- Minati Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Mongoli Brahma
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - G Krishnamoorthy
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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4
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Sun S, Qin C, Liu H, Jiang C. Excitation wavelength dependent ICT character and ISC efficiency in a photocleavage agent of 1-aminoanthraquinone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 234:118200. [PMID: 32172187 DOI: 10.1016/j.saa.2020.118200] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 02/12/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
Anthraquinone derivatives have been widely used as photocleavage agents and dyes. Here, photoinduced excited state intramolecular charge transfer (ICT) dynamics of 1-aminoanthraquinone in ethanol are studied by femtosecond transient absorption (fs-TA) spectroscopy and quantum chemical (QC) calculations. Four decay associated difference spectra and corresponding lifetime components were obtained by singular value decomposition and global fitting analysis from the fs-TA spectra. The QC calculations prove that the S1 state has obvious ICT character. Planar ICT (PICT) and twisted ICT (TICT) reaction coordinates are observed. On the PICT coordinate, vibrational relaxation (VR) and intersystem crossing (ISC) processes are observed. The ISC efficiency is dependent on excitation wavelength, which elucidates that T'2 state participates in the ISC process on a higher-level than the S'1 state. On the TICT coordinate, the TICT process is dependent on excitation wavelength, which elucidates a direct experimental evidence of an energy barrier in excited state TICT potential energy.
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Affiliation(s)
- Simei Sun
- School of Physics, Henan Normal University, Xinxiang 453007, China; Huangshi Key Laboratory of Photoelectric Technology and Materials, College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, China
| | - Chaochao Qin
- School of Physics, Henan Normal University, Xinxiang 453007, China; Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, Henan Normal University, Xinxiang 453007, China.
| | - Hua Liu
- School of Physics, Henan Normal University, Xinxiang 453007, China; Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, Henan Normal University, Xinxiang 453007, China
| | - Chao Jiang
- Huangshi Key Laboratory of Photoelectric Technology and Materials, College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, China
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5
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Bhattacharyya A, Makhal SC, Guchhait N. Simple chloro substituted HBT derivative portraying coupling of AIE and ESIPT phenomenon: Ratiometric detection of S2- and CN- in 100% aqueous medium. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112177] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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6
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Oger S, Schapman D, Mougeot R, Leleu S, Lascoux N, Baldeck P, Bénard M, Gallavardin T, Galas L, Franck X. Two-Photon Absorption and Cell Imaging of Fluorene-Functionalized Epicocconone Analogues. Chemistry 2019; 25:10954-10964. [PMID: 31215691 DOI: 10.1002/chem.201902731] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Indexed: 12/13/2022]
Abstract
Epicocconone 1 is a natural chromophore isolated from the fungus Epicoccum nigrum that has shown applications in proteomics and fluorescent microscopy thanks to its unique pro-fluorescence properties. The modification of the skeleton of the natural product by replacing the triene side chain by a fluorenyl scaffold can noticeably increase the fluorophore's absorption coefficient. The synthesis of the analogues of the natural product has been made possible by the use of a palladium-catalyzed carbonylation reaction, allowing the construction of the β-keto-dioxinone key intermediate. Two-photon absorption cross-section measurements of the fluorenyl epicocconone analogues show a structure dependency with values ranging from 60 to 280 GM and live cell imaging show intense staining of intracellular vesicle-like structures around the nucleus.
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Affiliation(s)
- Samuel Oger
- COBRA (UMR 6014 and FR 3038), Normandie Univ, CNRS, INSA Rouen, UNIROUEN, 76000, Rouen, France
| | - Damien Schapman
- PRIMACEN, Cell Imaging Platform of Normandy, Institute for Research and Innovation in Biomedicine (IRIB), Normandie Univ, Inserm, UNIROUEN, 76000, Rouen, France
| | - Romain Mougeot
- COBRA (UMR 6014 and FR 3038), Normandie Univ, CNRS, INSA Rouen, UNIROUEN, 76000, Rouen, France
| | - Stéphane Leleu
- COBRA (UMR 6014 and FR 3038), Normandie Univ, CNRS, INSA Rouen, UNIROUEN, 76000, Rouen, France
| | - Noëlle Lascoux
- Laboratoire de Chimie UMR 5182, Ecole Normale Supérieure de Lyon,CNRS, Université Lyon 1, 46, allée d'Italie, 69364, Lyon Cedex 07, France
| | - Patrice Baldeck
- Laboratoire de Chimie UMR 5182, Ecole Normale Supérieure de Lyon,CNRS, Université Lyon 1, 46, allée d'Italie, 69364, Lyon Cedex 07, France
| | - Magalie Bénard
- PRIMACEN, Cell Imaging Platform of Normandy, Institute for Research and Innovation in Biomedicine (IRIB), Normandie Univ, Inserm, UNIROUEN, 76000, Rouen, France
| | - Thibault Gallavardin
- COBRA (UMR 6014 and FR 3038), Normandie Univ, CNRS, INSA Rouen, UNIROUEN, 76000, Rouen, France
| | - Ludovic Galas
- PRIMACEN, Cell Imaging Platform of Normandy, Institute for Research and Innovation in Biomedicine (IRIB), Normandie Univ, Inserm, UNIROUEN, 76000, Rouen, France
| | - Xavier Franck
- COBRA (UMR 6014 and FR 3038), Normandie Univ, CNRS, INSA Rouen, UNIROUEN, 76000, Rouen, France
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7
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Song H, Wang K, Kuang Z, Zhao YS, Guo Q, Xia A. Solvent modulated excited state processes of push-pull molecule with hybridized local excitation and intramolecular charge transfer character. Phys Chem Chem Phys 2019; 21:3894-3902. [PMID: 30702103 DOI: 10.1039/c8cp06459h] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Recently, a type of synthetic highly efficient OLED molecule based on a hybridized local excitation and charge transfer (HLCT) character has received much attention as a potential high-efficiency fluorescent OLED material. In this article, we report the relaxation dynamics of the excited states of cyano-substituted oligo α-phenylenevinylene-1,4-bis(R-cyano-4-diphenylaminostyryl)-2,5-diphenylbenzene (CNDPASDB) with HLCT character using steady-state and time-resolved spectroscopy as well as quantum chemical calculations. The dramatic dependence of the fluorescence quantum yield, radiative and non-radiative rate, as well as the excited state relaxation pathways on solvent polarity reveals that the solvation process controls the energy levels of two closely spaced electronic excited states. By employing femtosecond transient absorption spectra, the gradual transition from the LE state to the intramolecular CT state with an increase in solvent polarity is clearly resolved. In low-polarity solvents the fluorescence of CNDPASDB is mainly emission from the LE state, whereas in high-polarity solvents non-radiative decay from the CT state dominates. And in medium-polarity solvents, because of the relatively weaker solvation-induced stabilization of the CT state, its energy could be equal to or slightly lower than that of the LE state, leading to a smaller driving force for LE → CT interconversion; therefore complete LE → CT interconversion cannot take place. In this situation, LE ↔ CT intercrossed equilibration is established and the equilibrium constant is further estimated to be about 4 according to the obtained kinetics, and the equilibrium population of the CT state is about 80%. DFT/TDDFT analysis also confirmed an efficient intercrossing of LE and CT states with an increase in solvent polarity. It is found that upon increasing the solvent polarity, the hole and electron on a molecule are entirely separated, suggesting a complete CT character. These results provide guidance for understanding the relationship between solvent polarity and the HLCT process, as well as for designing and synthesizing advanced OLED materials.
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Affiliation(s)
- Hongwei Song
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
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8
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Zhou M, Wang L, Zhang S, Zhang B. Ultrafast spectroscopy of the primary charge transfer and ISC processes in 9-anthraldehyde. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.12.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9
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Liu LY, Wu SS, Yu J, Chai S, Cong SL. Theoretical insights into excited-state intramolecular and multiple intermolecular hydrogen bonds in 2-(2-Hydroxy-phenyl)-4(3H)-quinazolinone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 207:61-67. [PMID: 30195187 DOI: 10.1016/j.saa.2018.08.054] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 08/12/2018] [Accepted: 08/26/2018] [Indexed: 06/08/2023]
Abstract
The photophysical properties and photochemistry reactions of 2-(2-Hydroxy-phenyl)-4(3H)-quinazolinone (HPQ) system in different solutions are studied by using density functional theory (DFT) and time-dependent density functional theory (TDDFT) methods. Our theoretical investigation explores that an ultrafast barrier-free excited state intramolecular proton transfer (ESIPT) process occurs and the configuration twisting is found in the electronic excited state. In the polar protic methanol solution, the hydrogen-bonded complex composed by HPQ and two methanol molecules (HPQ-2M) could exist stably in the ground state. Upon photoexcitation the isolated HPQ is initially excited to the first excited state, while the HPQ-2M system is firstly excited to the S3 state and undergoes internal conversion (IC) to the S1 state. The intermolecular hydrogen bonds are strengthened in the excited state. The simulated electronic spectra agree well with the experimental results. The strengthening of the intermolecular hydrogen bonds is also confirmed by the calculated vibrational spectra. In addition, the intramolecular charge transfer happens in both HPQ and HPQ-2M systems from the frontier molecular orbital analysis.
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Affiliation(s)
- Li-Yan Liu
- School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Shuai-Shuai Wu
- School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Jie Yu
- School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Shuo Chai
- School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China; State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China.
| | - Shu-Lin Cong
- School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China
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10
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Anandhan K, Cerón M, Perumal V, Ceballos P, Gordillo-Guerra P, Pérez-Gutiérrez E, Castillo AE, Thamotharan S, Percino MJ. Solvatochromism and pH effect on the emission of a triphenylimidazole-phenylacrylonitrile derivative: experimental and DFT studies. RSC Adv 2019; 9:12085-12096. [PMID: 35517007 PMCID: PMC9063490 DOI: 10.1039/c9ra01275c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/09/2019] [Indexed: 12/26/2022] Open
Abstract
In this work, a study of the photophysical properties in different solvents and at different pH values of a luminogenic compound with a donor–π–acceptor (D–π–A) structure was carried out. The compound (Z)-3-(4-(4,5-diphenyl-1H-imidazol-2-yl)phenyl)-2-phenylacrylonitrile (2) was synthesized and characterized by SCXRD, FT-IR, 1H NMR, 13C NMR, EIMS, UV-Vis absorption and fluorescence. The SCXRD characterization reveals a monoclinic system, P21/c, with Z = 4 and an imidazole core having hydrogen bonding with respect to water molecules present in the asymmetric unit. It leads to a strong π–π-interaction in the solid state. The fluorescence λmax emission of the powder and thin film was observed at 563 nm and 540 nm respectively. Several degrees of positive solvatochromic fluorescence were observed due to different molecular conformations in various solvents. When the pH of the compound was changed with HCl or NaOH, a shift in the wavelength of emission was observed in a reversible manner. At pH 2, the λmax of emission was at 541 nm whereas at pH 14 there were two emissions at 561 nm and 671 nm. Due to their good emission in the solid state, compound 2 was tested as an emitting layer in OLEDs; the devices showed an acceptable performance with a luminance average of 450 cd m−2. The band gap was analyzed by optical absorption, cyclic voltammetry measurement and DFT calculations. The optical properties of an imidazole derivative were studied at various pH values and in solvents and the solid-state through experimental and DFT calculation.![]()
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Affiliation(s)
- Karnambaram Anandhan
- Unidad de Polímeros y Electrónica Orgánica
- ICUAP
- Benemérita Universidad Autónoma de Puebla
- Pue
- Mexico 72960
| | - Margarita Cerón
- Unidad de Polímeros y Electrónica Orgánica
- ICUAP
- Benemérita Universidad Autónoma de Puebla
- Pue
- Mexico 72960
| | - Venkatesan Perumal
- Unidad de Polímeros y Electrónica Orgánica
- ICUAP
- Benemérita Universidad Autónoma de Puebla
- Pue
- Mexico 72960
| | - Paulina Ceballos
- Unidad de Polímeros y Electrónica Orgánica
- ICUAP
- Benemérita Universidad Autónoma de Puebla
- Pue
- Mexico 72960
| | - Paola Gordillo-Guerra
- Unidad de Polímeros y Electrónica Orgánica
- ICUAP
- Benemérita Universidad Autónoma de Puebla
- Pue
- Mexico 72960
| | - Enrique Pérez-Gutiérrez
- Unidad de Polímeros y Electrónica Orgánica
- ICUAP
- Benemérita Universidad Autónoma de Puebla
- Pue
- Mexico 72960
| | - Armando E. Castillo
- Unidad de Polímeros y Electrónica Orgánica
- ICUAP
- Benemérita Universidad Autónoma de Puebla
- Pue
- Mexico 72960
| | - Subbiah Thamotharan
- Biomolecular Crystallography Laboratory
- Department of Bioinformatics
- School of Chemical and Biotechnology
- SASTRA Deemed University
- Thanjavur 613 401
| | - M. Judith Percino
- Unidad de Polímeros y Electrónica Orgánica
- ICUAP
- Benemérita Universidad Autónoma de Puebla
- Pue
- Mexico 72960
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11
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Marefat Khah A, Grimmelsmann L, Knorr J, Nuernberger P, Hättig C. How a linear triazene photoisomerizes in a volume-conserving fashion. Phys Chem Chem Phys 2018; 20:28075-28087. [PMID: 30383059 DOI: 10.1039/c8cp05208e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding deactivation mechanisms of functional groups is a key step to design novel photo-active devices and molecular imaging agents. Here, we elucidate the photochemistry of linear triazenes, an extended analogue of the photo-switchable azo group, exemplarily for the widely used DNA-minor-groove binder berenil. Combining ultrafast spectroscopy and ab initio calculations unveils that the E-azo,s-trans structure of berenil predominates in the gas phase and in aqueous solution, and ADC(2) intrinsic reaction coordinate calculations disclose that the excited-state relaxation to the S1 minima/conical intersections follows a two-step mechanism: N[double bond, length as m-dash]N bond stretching followed by a bicycle-pedal rotation in the triazene bridge. Furthermore, studying the ground-state pathways shows that a fraction of the molecules relaxes back to the E-azo,s-trans isomer while the other part photoisomerizes to the Z-azo,s-trans via a hula-twist motion, as evidenced by experimental quantum yields of Φ ≈ 0.5 found for berenil in water, ethylene glycol, or bound to β-trypsin. Moreover, our studies show that while the excited-state relaxation is insensitive to the environment, the ground-state dynamics depend on biomolecular binding partners.
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12
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Kitagawa Y, Yachi R, Nakanishi T, Fushimi K, Hasegawa Y. Asymmetric Color-Changeable Luminophore with Donor-Acceptor-Donor Structure for Solvent and Temperature Sensitive Properties. ChemistrySelect 2018. [DOI: 10.1002/slct.201801902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuichi Kitagawa
- Faculty of Engineering; Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo; Hokkaido 060-8628 Japan. E-mail
| | - Ryuto Yachi
- Faculty of Engineering; Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo; Hokkaido 060-8628 Japan. E-mail
| | - Takayuki Nakanishi
- Faculty of Industrial Science and Technology; Tokyo University of Science, 6-3-1, Niijuku, Katsushika-ku; Tokyo 125-8585 Japan
| | - Koji Fushimi
- Faculty of Engineering; Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo; Hokkaido 060-8628 Japan. E-mail
| | - Yasuchika Hasegawa
- Faculty of Engineering; Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo; Hokkaido 060-8628 Japan. E-mail
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13
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Wu K, Zhang T, Wang Z, Wang L, Zhan L, Gong S, Zhong C, Lu ZH, Zhang S, Yang C. De Novo Design of Excited-State Intramolecular Proton Transfer Emitters via a Thermally Activated Delayed Fluorescence Channel. J Am Chem Soc 2018; 140:8877-8886. [DOI: 10.1021/jacs.8b04795] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Kailong Wu
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People’s Republic of China
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, People’s Republic of China
| | - Tao Zhang
- Department of Physics, Yunnan Key Laboratory for Micro/Nano Materials and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Zian Wang
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People’s Republic of China
| | - Lian Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
| | - Lisi Zhan
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People’s Republic of China
| | - Shaolong Gong
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People’s Republic of China
| | - Cheng Zhong
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People’s Republic of China
| | - Zheng-Hong Lu
- Department of Physics, Yunnan Key Laboratory for Micro/Nano Materials and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Song Zhang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
| | - Chuluo Yang
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People’s Republic of China
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, People’s Republic of China
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14
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Babu SS, Shanmugam S. Metal-Free γ,δ
-Unsaturated β
-Ketothiolester: Solvatochromism, AIEE and Detection of Picric Acid. ChemistrySelect 2018. [DOI: 10.1002/slct.201702805] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Sivakumar Shanmugam
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625021 India
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15
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Mukherjee P, Das A, Faizi MSH, Sen P. Solvent Relaxation Accompanied Ultrafast Excited State Proton Transfer Dynamics Revealed in a Salicylideneaniline Derivative. ChemistrySelect 2018. [DOI: 10.1002/slct.201800380] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Puspal Mukherjee
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208 016 India
| | - Aritra Das
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208 016 India
| | - Md. Serajul Haque Faizi
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208 016 India
- Present address: Department of Chemistry, Langat Singh College; B. R. A. Bihar University, Muzaffarpur; Bihar - 842001 India
| | - Pratik Sen
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208 016 India
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16
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Alarcos N, Cohen B, Ziółek M, Douhal A. Photochemistry and Photophysics in Silica-Based Materials: Ultrafast and Single Molecule Spectroscopy Observation. Chem Rev 2017; 117:13639-13720. [PMID: 29068670 DOI: 10.1021/acs.chemrev.7b00422] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Silica-based materials (SBMs) are widely used in catalysis, photonics, and drug delivery. Their pores and cavities act as hosts of diverse guests ranging from classical dyes to drugs and quantum dots, allowing changes in the photochemical behavior of the confined guests. The heterogeneity of the guest populations as well as the confinement provided by these hosts affect the behavior of the formed hybrid materials. As a consequence, the observed reaction dynamics becomes significantly different and complex. Studying their photobehavior requires advanced laser-based spectroscopy and microscopy techniques as well as computational methods. Thanks to the development of ultrafast (spectroscopy and imaging) tools, we are witnessing an increasing interest of the scientific community to explore the intimate photobehavior of these composites. Here, we review the recent theoretical and ultrafast experimental studies of their photodynamics and discuss the results in comparison to those in homogeneous media. The discussion of the confined dynamics includes solvation and intra- and intermolecular proton-, electron-, and energy transfer events of the guest within the SBMs. Several examples of applications in photocatalysis, (photo)sensors, photonics, photovoltaics, and drug delivery demonstrate the vast potential of the SBMs in modern science and technology.
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Affiliation(s)
- Noemí Alarcos
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
| | - Boiko Cohen
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
| | - Marcin Ziółek
- Quantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University , Umultowska 85, 61-614 Poznań, Poland
| | - Abderrazzak Douhal
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
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17
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Kothavale S, Sekar N. A New Series of Highly Fluorescent Blue-Green Emitting, Imidazole-Based ICT-ESIPT Compounds: Detail Experimental and DFT Study of Structural and Donating Group Effects on Fluorescence Properties. ChemistrySelect 2017. [DOI: 10.1002/slct.201700537] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shantaram Kothavale
- Department of Dyestuff Technology; Institute of Chemical Technology, Matunga; Mumbai India
| | - Nagaiyan Sekar
- Department of Dyestuff Technology; Institute of Chemical Technology, Matunga; Mumbai India
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18
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Wang F, DeRosa CA, Daly ML, Song D, Fraser CL. Multi-stimuli responsive luminescent azepane-substituted β-diketones and difluoroboron complexes. MATERIALS CHEMISTRY FRONTIERS 2017; 1:1866-1874. [PMID: 29774165 PMCID: PMC5951180 DOI: 10.1039/c7qm00137a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Difluoroboron β-diketonate (BF2bdk) compounds show environment-sensitive optical properties in solution, aggregation-induced emission (AIE) and multi-stimuli responsive fluorescence switching in the solid state. Here, a series of 4-azepane-substituted β-diketone (bdk) ligands (L-H, L-OMe, L-Br) and their corresponding difluoroboron dyes (D-H, D-OMe, D-Br) were synthesized, and various responsive fluorescence properties of the compounds were studied, including solvatochromism, viscochromism, AIE, mechanochromic luminescence (ML) and halochromism. Compared to the β-diketones, the boron complexes exhibited higher extinction coefficients but lower quantum yields, and red-shifted absorption and emission in CH2Cl2. Computational studies showed that intramolecular charge transfer (ICT) dominated rather than π-π* transitions in all the compounds regardless of boron coordination. In solution, all the bdk ligands and boron dyes showed red-shifted emission in more polar solvents and increased fluorescence intensity in more viscous media. Upon aggregation, the emission of the β-diketones was quenched, however, the boronated dyes showed increased emission, indicative of AIE. Solid-state emission properties, ML and halochromism, were investigated on spin cast films. For ML, smearing caused a bathochromic emission shift for L-Br, and powder X-ray diffraction (XRD) patterns showed that the "as spun" and thermally annealed states were more crystalline and the smeared state was amorphous. No obvious ML emission shift was observed for L-H or L-OMe, and the boronated dyes were not mechano-active. Trifluoroacetic acid (TFA) and triethylamine (TEA) vapors were used to study halochromism. Large hypsochromic emission shifts were observed for all the compounds after TFA vapor was applied, and reversible fluorescence switching was achieved using the acid/base pair.
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Affiliation(s)
- Fang Wang
- Department of Chemistry, University of Virginia, Charlottesville,
Virginia 22904
| | | | - Margaret L. Daly
- Department of Chemistry, University of Virginia, Charlottesville,
Virginia 22904
| | - Daniel Song
- Department of Chemistry, University of Virginia, Charlottesville,
Virginia 22904
| | - Cassandra L. Fraser
- Department of Chemistry, University of Virginia, Charlottesville,
Virginia 22904
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19
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Ultrafast investigation of photoinduced charge transfer in aminoanthraquinone pharmaceutical product. Sci Rep 2017; 7:43419. [PMID: 28233835 PMCID: PMC5324068 DOI: 10.1038/srep43419] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 01/24/2017] [Indexed: 01/03/2023] Open
Abstract
We investigated the mechanism of intramolecular charge transfer and the following radiationless dynamics of the excited states of 1-aminoanthraquinone using steady state and time-resolved absorption spectroscopy combined with quantum chemical calculations. Following photoexcitation with 460 nm, conformational relaxation via twisting of the amino group, charge transfer and the intersystem crossing (ISC) processes have been established to be the major relaxation pathways responsible for the ultrafast nonradiative of the excited S1 state. Intramolecular proton transfer, which could be induced by intramolecular hydrogen bonding is inspected and excluded. Time-dependent density functional theory (TDDFT) calculations reveal the change of the dipole moments of the S0 and S1 states along the twisted coordinate of the amino group, indicating the mechanism of twisted intra-molecular charge transfer (TICT). The timescale of TICT is measured to be 5 ps due to the conformational relaxation and a barrier on the S1 potential surface. The ISC from the S1 state to the triplet manifold is a main deactivation pathway with the decay time of 28 ps. Our results observed here have yield a physically intuitive and complete picture of the photoinduced charge transfer and radiationless dynamics in anthraquinone pharmaceutial products.
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20
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Kieda RD, Dunkelberger AD, Case AS, Crim FF. Solvent Dependent Dynamics of Salicylidene Aniline in Binary Mixtures of Supercritical CO2 with 1-Propanol or Cyclohexane. J Phys Chem B 2017; 121:835-842. [DOI: 10.1021/acs.jpcb.6b05959] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryan D. Kieda
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Adam D. Dunkelberger
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Amanda S. Case
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - F. Fleming Crim
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
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21
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Ghosh R, Manna B. Comparative photophysics and ultrafast dynamics of dimethylaminochalcone and a structurally rigid derivative: experimental identification of TICT coordinate. Phys Chem Chem Phys 2017; 19:23078-23084. [DOI: 10.1039/c7cp03461j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Restriction of torsional relaxation and solvent dependent competing photophysical dynamics of free and rigid dimethylaminochalcones were investigated by time resolved spectroscopy.
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Affiliation(s)
- Rajib Ghosh
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
| | - Biswajit Manna
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
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22
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Chen YA, Meng FY, Hsu YH, Hung CH, Chen CL, Chung KY, Tang WF, Hung WY, Chou PT. N−H-Type Excited-State Proton Transfer in Compounds Possessing a Seven-Membered-Ring Intramolecular Hydrogen Bond. Chemistry 2016; 22:14688-95. [DOI: 10.1002/chem.201602425] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Yi-An Chen
- Department of Chemistry; Center for Emerging Material and Advanced Devices; National Taiwan University; Taipei 10617 Taiwan R.O.C
| | - Fan-Yi Meng
- Department of Chemistry; Center for Emerging Material and Advanced Devices; National Taiwan University; Taipei 10617 Taiwan R.O.C
| | - Yen-Hao Hsu
- Department of Chemistry; Center for Emerging Material and Advanced Devices; National Taiwan University; Taipei 10617 Taiwan R.O.C
| | - Cheng-Hsien Hung
- Department of Chemistry; Center for Emerging Material and Advanced Devices; National Taiwan University; Taipei 10617 Taiwan R.O.C
| | - Chi-Lin Chen
- Department of Chemistry; Center for Emerging Material and Advanced Devices; National Taiwan University; Taipei 10617 Taiwan R.O.C
| | - Kun-You Chung
- Department of Chemistry; Center for Emerging Material and Advanced Devices; National Taiwan University; Taipei 10617 Taiwan R.O.C
| | - Wei-Feng Tang
- Institute of Optoelectronic Sciences; National Taiwan Ocean University; Keelung 20224 Taiwan R.O.C
| | - Wen-Yi Hung
- Institute of Optoelectronic Sciences; National Taiwan Ocean University; Keelung 20224 Taiwan R.O.C
| | - Pi-Tai Chou
- Department of Chemistry; Center for Emerging Material and Advanced Devices; National Taiwan University; Taipei 10617 Taiwan R.O.C
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23
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Zhao J, Yang Y. Excited state proton transfer coupled with twisted intermolecular charge transfer for N,N-dimethylanilino-1,3-diketone in high polar acetonitrile solvent. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.05.029] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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24
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Nandi A, Ghosh R, Palit DK. Excited state relaxation pathways of 4-dimethylamino-β-nitrostyrene: Effect of solvent polarity and donor–acceptor conjugation. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.02.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Savarese M, Brémond É, Adamo C, Rega N, Ciofini I. Excited-State Proton Transfer and Intramolecular Charge Transfer in 1,3-Diketone Molecules. Chemphyschem 2016; 17:1530-8. [DOI: 10.1002/cphc.201500908] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Marika Savarese
- CompuNet; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
| | - Éric Brémond
- CompuNet; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
| | - Carlo Adamo
- CompuNet; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
- Institut de Recherche de Chimie Paris IRCP; CNRS-Chimie ParisTech, PSL Research University; 11 rue Pierre et Marie Curie 75005 Paris France
- Institut Universitaire de France; 103 Boulevard Saint Michel 75005 Paris France
| | - Nadia Rega
- Dipartimento di Scienze Chimiche; Università di Napoli 'Federico II', Complesso Universitario di M.S.Angelo; via Cintia 80126 Napoli Italy
- Italian Institute of Technology; IIT@CRIB Center for Advanced Biomaterials for Healthcare; Largo Barsanti e Matteucci 80125 Napoli Italy
| | - Ilaria Ciofini
- Institut de Recherche de Chimie Paris IRCP; CNRS-Chimie ParisTech, PSL Research University; 11 rue Pierre et Marie Curie 75005 Paris France
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26
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Vester M, Grueter A, Finkler B, Becker R, Jung G. Biexponential photon antibunching: recombination kinetics within the Förster-cycle in DMSO. Phys Chem Chem Phys 2016; 18:10281-8. [PMID: 27020473 DOI: 10.1039/c6cp00718j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Time-resolved experiments with pulsed-laser excitation are the standard approach to map the dynamic evolution of excited states, but ground-state kinetics remain hidden or require pump-dump-probe schemes. Here, we exploit the so-called photon antibunching, a purely quantum-optical effect related to single molecule detection to assess the rate constants for a chemical reaction in the electronic ground state. The measurement of the second-order correlation function g((2)), i.e. the evaluation of inter-photon arrival times, is applied to the reprotonation in a Förster-cycle. We find that the antibunching of three different photoacids in the aprotic solvent DMSO significantly differs from the behavior in water. The longer decay constant of the biexponential antibunching tl is linked to the bimolecular reprotonation kinetics of the fully separated ion-pair, independent of the acidic additives. The value of the corresponding bimolecular rate constant, kp = 4 × 10(9) M(-1) s(-1), indicates diffusion-controlled reprotonation. The analysis of tl also allows for the extraction of the separation yield of proton and the conjugated base after excitation and amounts to approximately 15%. The shorter time component ts is connected to the decay of the solvent-separated ion pair. The associated time constant for geminate reprotonation is approximately 3 ± 1 ns in agreement with independent tcspc experiments. These experiments verify that the transfer of quantum-optical experiments to problems in chemistry enables mechanistic conclusions which are hardly accessible by other methods.
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Affiliation(s)
- Michael Vester
- Biophysical Chemistry, Saarland University, 66123 Saarbrücken, Germany.
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27
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Two Sensitive Fluorescent BOPIM Probes with Tunable TICT Character for Low-Level Water Detection in Organic Solvents. J Fluoresc 2015; 26:363-9. [DOI: 10.1007/s10895-015-1722-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 11/02/2015] [Indexed: 11/27/2022]
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28
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Liu YH, Lan SC, Zhu C, Lin SH. Intersystem Crossing Pathway in Quinoline–Pyrazole Isomerism: A Time-Dependent Density Functional Theory Study on Excited-State Intramolecular Proton Transfer. J Phys Chem A 2015; 119:6269-74. [DOI: 10.1021/acs.jpca.5b03557] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Yu-Hui Liu
- Department
of Physics, College of Mathematics and Physics, Bohai University, Jinzhou 121013, China
- Department
of Applied Chemistry, Institute of Molecular Science and Center for
Interdisciplinary Molecular Science, National Chiao-Tung University, Hsinchu 30050, Taiwan
| | - Sheng-Cheng Lan
- Department
of Physics, College of Mathematics and Physics, Bohai University, Jinzhou 121013, China
| | - Chaoyuan Zhu
- Department
of Applied Chemistry, Institute of Molecular Science and Center for
Interdisciplinary Molecular Science, National Chiao-Tung University, Hsinchu 30050, Taiwan
| | - Sheng-Hsien Lin
- Department
of Applied Chemistry, Institute of Molecular Science and Center for
Interdisciplinary Molecular Science, National Chiao-Tung University, Hsinchu 30050, Taiwan
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29
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Chatterjee S, Karuso P, Boulangé A, Franck X, Datta A. Excited State Dynamics of Brightly Fluorescent Second Generation Epicocconone Analogues. J Phys Chem B 2015; 119:6295-303. [DOI: 10.1021/acs.jpcb.5b02190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Soumit Chatterjee
- Department of Chemistry & Biomolecular Sciences, Macquarie University, Sydney 2109, Australia
| | - Peter Karuso
- Department of Chemistry & Biomolecular Sciences, Macquarie University, Sydney 2109, Australia
| | - Agathe Boulangé
- Normandie Univ,
COBRA, UMR 6014 et FR 3038, CNRS, Univ Rouen, INSA Rouen, 1 rue Tesnières, 76821 Mont-Saint-Aignan, Cedex, France
| | - Xavier Franck
- Normandie Univ,
COBRA, UMR 6014 et FR 3038, CNRS, Univ Rouen, INSA Rouen, 1 rue Tesnières, 76821 Mont-Saint-Aignan, Cedex, France
| | - Anindya Datta
- Department
of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
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30
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Solvent Dependency in the Quantum Efficiency of 4-[(4-Aminophenyl)-(4-imino-1-cyclohexa-2, 5- dienylidene) methyl] Aniline Hydrochloride. J Fluoresc 2015; 25:739-44. [PMID: 25820872 DOI: 10.1007/s10895-015-1560-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 03/16/2015] [Indexed: 10/23/2022]
Abstract
In the present work dual beam thermal lens technique is used for studying the solvent dependency on the quantum efficiency of a novel dye used for biomedical applications. The role of solvent in the absolute fluorescence quantum yield of 4-[(4-Aminophenyl)-(4-imino-1-cyclohexa-2, 5- dienylidene) methyl] aniline hydrochloride is studied using thermal lens technique. It is observed that the variation in solvents and its concentration results considerable variations in the fluorescence quantum yield. These variations are due to the non-radiative relaxation of the absorbed energy and because of the different solvent properties. The highest quantum yield of the dye is observed in the polar protic solvent-water.
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31
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Gutierrez M, Alarcos N, Liras M, Sánchez F, Douhal A. Switching to a Reversible Proton Motion in a Charge-Transferred Dye. J Phys Chem B 2015; 119:552-62. [DOI: 10.1021/jp511345z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mario Gutierrez
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S.N., 45071 Toledo, Spain
| | - Noemí Alarcos
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S.N., 45071 Toledo, Spain
| | - Marta Liras
- Instituto
de Química Orgánica General, IQOG-CSIC, Juan de la
Cierva, 3, 28006 Madrid, Spain
| | - Félix Sánchez
- Instituto
de Química Orgánica General, IQOG-CSIC, Juan de la
Cierva, 3, 28006 Madrid, Spain
| | - Abderrazzak Douhal
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S.N., 45071 Toledo, Spain
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32
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Verma PK, Steinbacher A, Koch F, Nuernberger P, Brixner T. Monitoring ultrafast intramolecular proton transfer processes in an unsymmetric β-diketone. Phys Chem Chem Phys 2015; 17:8459-66. [DOI: 10.1039/c4cp05811a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Electronic excitation of a UV-absorbing unsymmetric β-diketone discloses intramolecular proton transfer among electronic ground as well as excited states.
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Affiliation(s)
- Pramod Kumar Verma
- Institut für Physikalische und Theoretische Chemie
- Universität Würzburg
- Am Hubland
- Germany
| | - Andreas Steinbacher
- Institut für Physikalische und Theoretische Chemie
- Universität Würzburg
- Am Hubland
- Germany
| | - Federico Koch
- Institut für Physikalische und Theoretische Chemie
- Universität Würzburg
- Am Hubland
- Germany
| | - Patrick Nuernberger
- Institut für Physikalische und Theoretische Chemie
- Universität Würzburg
- Am Hubland
- Germany
- Physikalische Chemie II
| | - Tobias Brixner
- Institut für Physikalische und Theoretische Chemie
- Universität Würzburg
- Am Hubland
- Germany
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33
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Behera SK, Karak A, Krishnamoorthy G. Photophysics of 2-(4'-amino-2'-hydroxyphenyl)-1H-imidazo-[4,5-c]pyridine and its analogues: intramolecular proton transfer versus intramolecular charge transfer. J Phys Chem B 2014; 119:2330-44. [PMID: 25337987 DOI: 10.1021/jp5064808] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photophysical characteristics of 2-(4'-amino-2'-hydroxyphenyl)-1H-imidazo-[4,5-c]pyridine (AHPIP-c) have been studied in various aprotic and protic solvents using UV-visible, steady state fluorescence and time-resolved fluorescence spectroscopic techniques. To comprehend the competition between the intramolecular charge transfer (ICT) and the excited state intramolecular proton transfer (ESIPT) processes, the photophysical properties of 2-(4'-amino-2'-methoxyphenyl)-1H-imidazo-[4,5-c]pyridine (AMPIP-c) and 2-(4'-aminophenyl)-1H-imidazo-[4,5-c]pyridine (APIP-c) were also investigated. Though APIP-c displays twisted ICT (TICT) emission in protic solvents, AHPIP-c exhibits normal and tautomer emissions in aprotic as well as in protic solvents due to ESIPT. However, the methoxy derivative, AMPIP-c, emits weak TICT fluorescence in methanol.
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Affiliation(s)
- Santosh Kumar Behera
- Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781039, India
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34
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Verma PK, Koch F, Steinbacher A, Nuernberger P, Brixner T. Ultrafast UV-Induced Photoisomerization of Intramolecularly H-Bonded Symmetric β-Diketones. J Am Chem Soc 2014; 136:14981-9. [DOI: 10.1021/ja508059p] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Pramod Kumar Verma
- Institut für Physikalische
und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Federico Koch
- Institut für Physikalische
und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Andreas Steinbacher
- Institut für Physikalische
und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Patrick Nuernberger
- Institut für Physikalische
und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Tobias Brixner
- Institut für Physikalische
und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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35
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Abdelhameed M, Langlois A, Fortin D, Karsenti PL, Harvey PD. A drastic substituent effect on the emission properties of quinone diimine models and valuable insight into the excited states of emeraldine. Chem Commun (Camb) 2014; 50:11214-7. [DOI: 10.1039/c4cc05178e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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36
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Erez Y, Simkovitch R, Shomer S, Gepshtein R, Huppert D. Effect of Acid on the Ultraviolet–Visible Absorption and Emission Properties of Curcumin. J Phys Chem A 2014; 118:872-84. [DOI: 10.1021/jp411686d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Yuval Erez
- Department
of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ron Simkovitch
- Raymond
and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
| | - Shay Shomer
- Raymond
and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
| | - Rinat Gepshtein
- Raymond
and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
| | - Dan Huppert
- Raymond
and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
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37
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Cornago P, Cabildo P, Sanz D, Claramunt RM, Torralba MC, Torres MR, Elguero J. Structures of Hemi-Curcuminoids in the Solid State and in Solution. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300488] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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