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Liang R, Li Y, Yan Z, Bai X, Lai W, Du L, Phillips DL. Exploring Solvent Effects on the Proton Transfer Processes of Selected Benzoxazole Derivatives by Femtosecond Time-Resolved Fluorescence and Transient Absorption Spectroscopies. ACS PHYSICAL CHEMISTRY AU 2022; 3:181-189. [PMID: 36968447 PMCID: PMC10037457 DOI: 10.1021/acsphyschemau.2c00036] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022]
Abstract
Excited-state intramolecular proton transfer (ESIPT) is of great importance due to the large Stokes shift emission that can be observed in some ESIPT molecules. Although steady-state spectroscopies have been employed to study the properties of some ESIPT molecules, their excited-state dynamics have not been examined directly with time-resolved spectroscopy methods yet for a number of systems. Here, an in-depth investigation of the solvent effects on the excited-state dynamics of two prototypical ESIPT molecules, 2-(2'-hydroxyphenyl)-benzoxazole (HBO) and 2-(2'-hydroxynaphthalenyl)-benzoxazole (NAP), have been accomplished by using femtosecond time-resolved fluorescence and transient absorption spectroscopies. Solvent effects affect the excited-state dynamics of HBO more significantly than that of NAP. Particularly in the presence of water, the photodynamics pathways of HBO are changed, while only small changes can be found in NAP. An ultrafast ESIPT process that occurs within our instrumental response is observed for HBO, and this is followed by an isomerization process in ACN solution. However, in aqueous solution, the obtained syn-keto* after ESIPT can be solvated by water in about 3.0 ps, and the isomerization process is totally inhibited for HBO. The mechanism of NAP is different from HBO and is determined to be a two-step excited-state proton transfer process. Upon photoexcitation, NAP is deprotonated first in the excited state to generate the anion*, which can transfer to the syn-keto* form followed by an isomerization process.
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Affiliation(s)
- Runhui Liang
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, P.R. China
- Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P.R. China
| | - Yuanchun Li
- Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P.R. China
| | - Zhiping Yan
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech), Nanjing 211816, P.R. China
| | - Xueqin Bai
- Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P.R. China
| | - Wenquan Lai
- Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P.R. China
| | - Lili Du
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, P.R. China
- Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P.R. China
| | - David Lee Phillips
- Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P.R. China
- Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, Hong Kong 999077, P.R. China
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2
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Yang D, Yang W, Tian Y, Zheng R. Regulating the excited state behaviors of 2-benzooxazol-2-yl-4,6-di-tert-butyl-phenol fluorophore by solvent polarity: a theoretical simulation. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111513] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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3
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Suzuki N, Kubota T, Ando N, Yamaguchi S. Photobase-Driven Excited-State Intramolecular Proton Transfer (ESIPT) in a Strapped π-Electron System. Chemistry 2021; 28:e202103584. [PMID: 34841575 DOI: 10.1002/chem.202103584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Indexed: 11/09/2022]
Abstract
We report a new design strategy for an excited-state intramolecular proton transfer (ESIPT) fluorophore that can be used in acidic media. A photobasic pyridine-centered donor-acceptor-donor-type fluorophore is combined with a basic trialkylamine "strap". In the presence of an acid, protonation occurs predominantly at the amine moiety in the ground state. A single-crystal X-ray diffraction analysis confirmed the formation of a pre-organized intramolecular hydrogen-bonded structure between the resulting ammonium moiety and the pyridine ring. Upon excitation, the intramolecular charge-transfer transition increases the basicity of the pyridine moiety in the excited state, resulting in proton transfer from the amine to the pyridine moiety. Consequently, the fluorophore takes on a polymethine-dye character in the ESIPT state, which gives rise to significantly red-shifted emission with an increased fluorescence quantum yield.
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Affiliation(s)
- Naoya Suzuki
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan
| | - Tomoya Kubota
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan
| | - Naoki Ando
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya, 464-8601, Japan
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Abstract
Organophosphorus compounds are organic compounds widely employed in agriculture as well as in chemical weapons. The use in agriculture is due to their insecticidal properties. However, in chemical warfare, the use of organophosphorus is associated with acetylcholinesterase inhibition, which promotes the cholinergic syndromes. In this line, the fast detection of this class of compound is crucial for the determination of environmental exposure. This improved detection will naturally allow for more prompt courses of treatment depending on the contaminant findings. In this perspective, the dipyrrinone oxime (1) was employed for the detection of organophosphorus compounds that are employed as nerve agents, such as cyclosarin, sarin, soman, diethyl chlorophosphate, diisopropylfluorophosphate, 2-(dimethylamino)ethyl N,N-dimethylphosphoramidofluoridate, O-ethyl-S-[2-(diethylamino)ethyl]methylphosphonothioate, O-ethyl-S-[2(diisopropylamino)ethyl] methylphosphonothioate, and O,O-diethyl-S-[2-(diethylamino)ethyl] phosphorothioate, through fluorescent emission. The thermodynamics and kinetic parameters as well as spectroscopic properties of the complexes formed for 1 and all organophosphorus compounds previously cited were investigated by means of theoretical calculations. From our findings, only the diethyl chlorophosphate, 2-(dimethylamino)ethyl N,N-dimethylphosphoramidofluoridate, and O,O-diethyl-S-[2-(diethylamino)ethyl] phosphorothioate emitted fluorescence in the hexane, toluene, chloroform, dichloromethane, methanol, acetonitrile, water, and dimethyl sulfoxide solvents. The study of the absorption wavelength with the most polar solvent showed higher values compared to apolar solvents. In the same solvent, for instance, soman in hexane showed the lowest absorption wavelength value, 324.5 nm, and DCP the highest value, 330.8 nm. This behavior was observed in other tested solvents. The thermodynamic parameters indicate negative Gibbs free energy (ΔG) values for the O-ethyl-S-[2(diisopropylamino)ethyl] methylphosphonothioate with 1 reaction. On the other hand, the sarin and cyclosarin revealed the lowest Gibbs free energy (ΔG‡) values, being kinetically favorable and presenting more reactivity.
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Roohi H, Rostami T. Mechanism of the photo triggered ring-opening reaction of spiropyran derivatives (SP-X1-7; X1-7 = H, NO2, CF3, CN, OH, OMe and NMe2) in the gas phase and various solvent media: A GD3-TD-DFT approach. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Yang G, Jin X, Chen K, Yang D. Uncovering the excited state trends and ESIPT mechanism for 2-(hydroxy-3-dimethyl-phenyl)-benzooxazole-6-carboxylicacid. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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7
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Wiethaus G, Toldo JM, da Silveira Santos F, da Costa Duarte R, Gonçalves PFB, Rodembusch FS. Experimental and theoretical investigation of long-wavelength fluorescence emission in push–pull benzazoles: intramolecular proton transfer or charge transfer in the excited state? Phys Chem Chem Phys 2019; 21:4408-4420. [DOI: 10.1039/c8cp05186k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ESIPT is disfavoured and charge-transfer emission, prior to ESIPT, seems to be responsible for long-emission wavelengths.
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Affiliation(s)
- Guilherme Wiethaus
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Josene Maria Toldo
- Grupo de Química Teórica e Computacional
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Fabiano da Silveira Santos
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Rodrigo da Costa Duarte
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Paulo Fernando Bruno Gonçalves
- Grupo de Química Teórica e Computacional
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Fabiano Severo Rodembusch
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
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Lampkin BJ, Nguyen YH, Karadakov PB, VanVeller B. Demonstration of Baird's rule complementarity in the singlet state with implications for excited-state intramolecular proton transfer. Phys Chem Chem Phys 2019; 21:11608-11614. [DOI: 10.1039/c9cp02050k] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Greater aromaticity in the ground state leads to greater antiaromaticity in the excited state (and vice versa) which helps rationalize previously unexplained behavior of ESIPT fluorophores.
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9
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Mohan M, Satyanarayan MN, Trivedi DR. Photophysics of proton transfer in hydrazides: a combined theoretical and experimental analysis towards OLED device application. NEW J CHEM 2019. [DOI: 10.1039/c9nj01503e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Effect of conjugation to support ESIPT with impossible double proton transfer in structurally favored species.
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Affiliation(s)
- Makesh Mohan
- Optoelectronics Laboratory
- Department of Physics
- National Institute of Technology Karnataka (NITK) Surathkal
- Mangalore – 575025
- India
| | - M. N. Satyanarayan
- Optoelectronics Laboratory
- Department of Physics
- National Institute of Technology Karnataka (NITK) Surathkal
- Mangalore – 575025
- India
| | - Darshak R. Trivedi
- Supramolecular Chemistry Laboratory
- Department of Chemistry
- National Institute of Technology Karnataka (NITK) Surathkal
- Mangalore – 575025
- India
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10
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Kroetz T, dos Santos MC, Beal R, Zanotto GM, Santos FS, Giacomelli FC, Gonçalves PFB, de Lima VR, Dal-Bó AG, Rodembusch FS. Proton transfer in fluorescent secondary amines: synthesis, photophysics, theoretical calculation and preparation of photoactive phosphatidylcholine-based liposomes. Photochem Photobiol Sci 2019; 18:1171-1184. [DOI: 10.1039/c9pp00017h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New proton-transfer lipophilic based benzazoles.
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Affiliation(s)
- Thais Kroetz
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- CEP 91501-970 Porto Alegre-RS
- Brazil
| | | | - Roiney Beal
- Grupo de Química Teórica
- Instituto de Química
- Universidade Federal do Rio Grande do Sul
- Porto Alegre-RS
- Brazil
| | - Gabriel Modernell Zanotto
- Grupo de Química Teórica
- Instituto de Química
- Universidade Federal do Rio Grande do Sul
- Porto Alegre-RS
- Brazil
| | | | | | - Paulo F. B. Gonçalves
- Grupo de Química Teórica
- Instituto de Química
- Universidade Federal do Rio Grande do Sul
- Porto Alegre-RS
- Brazil
| | | | | | - Fabiano S. Rodembusch
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- CEP 91501-970 Porto Alegre-RS
- Brazil
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11
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Shang Y, Zheng S, Tsakama M, Wang M, Chen W. A water-soluble, small molecular fluorescence probe based on 2-(2′-hydroxyphenyl) benzoxazole for Zn2+ in plants. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.09.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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12
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Density Functional Theory Applied to Excited State Intramolecular Proton Transfer in Imidazole-, Oxazole-, and Thiazole-Based Systems. Molecules 2018; 23:molecules23051231. [PMID: 29883373 PMCID: PMC6100175 DOI: 10.3390/molecules23051231] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/15/2018] [Accepted: 05/17/2018] [Indexed: 01/28/2023] Open
Abstract
Excited state intramolecular proton transfer (ESIPT) is a photoinduced process strongly associated to hydrogen bonding within a molecular framework. In this manuscript, we computed potential energy data using Time Dependent Density Functional Theory (TDDFT) for triphenyl-substituted heterocycles, which evidenced an energetically favorable proton transfer on the excited state (i.e., ESIPT) but not on the ground state. Moreover, we describe how changes on heterocyclic functionalities, based on imidazole, oxazole, and thiazole systems, affect the ESIPT process that converts an enolic species to a ketonic one through photon-induced proton transfer. Structural and photophysical data were obtained theoretically by means of density functional theory (DFT) calculations and contrasted for the three heterocyclics. Different functionals were used, but B3LYP was the one that adequately predicted absorption data. It was observed that the intramolecular hydrogen bond is strengthened in the excited state, supporting the occurrence of ESIPT. Finally, it was observed that, with the formation of the excited state, there is a decrease in electronic density at the oxygen atom that acts as proton donor, while there is a substantial increase in the corresponding density at the nitrogen atom that serves as proton acceptor, thus, indicating that proton transfer is indeed favored after photon absorption.
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13
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Roohi H, Alizadeh P. Fine tuning the emission wavelengths of the 7-hydroxy-1-indanone based nano-structure dyes: Near-infrared (NIR) dual emission generation with large stokes shifts. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 196:83-102. [PMID: 29444499 DOI: 10.1016/j.saa.2018.01.081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 12/31/2017] [Accepted: 01/30/2018] [Indexed: 06/08/2023]
Abstract
Near-infrared (NIR) fluorescent dyes have recently gained special attention due to their applications to use as molecular probes for imaging of biological targets and sensitive determination. In this study, photophysical properties of the 7-hydroxy-1-indanone based fluorophors A1, A2, A3, B1, B2 and 3R-B2 (R=CF3, NH2, NO2 and OMe) in the gas and three solution phases were probed using TD-DFT method at PBE0/6-311++G(d,p) and M06-2X/6-311++G(d,p) levels of theory. In addition to structural and photophysical properties as well as ESIPT mechanism of all mentioned molecules, the FC and relaxed potential energy surfaces of B2 and 3R-B2 (R=CF3 and NH2) molecules were explored in gas phase and acetonitrile, cyclohexane and water solvents. It is predicted that the A1, A3 and 3R-B2 chromophores afford normal (615-670nm) and NIR fluorescence emissions (770-940nm; biological window) with the large Stokes shifts of >160 and >300nm, respectively. A good aggrement was found between theoretical and experimental results. In sum, these new types of dyes may render the new approaches for the development of the most efficient NIR fluorescent probes for enhanced image contrast and optimal apparent brightness in biological applications.
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Affiliation(s)
- Hossein Roohi
- Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran.
| | - Parvaneh Alizadeh
- Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran
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Suzuki N, Suda K, Yokogawa D, Kitoh-Nishioka H, Irle S, Ando A, Abegão LMG, Kamada K, Fukazawa A, Yamaguchi S. Near infrared two-photon-excited and -emissive dyes based on a strapped excited-state intramolecular proton-transfer (ESIPT) scaffold. Chem Sci 2018; 9:2666-2673. [PMID: 29719675 PMCID: PMC5897875 DOI: 10.1039/c8sc00066b] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 01/26/2018] [Indexed: 12/21/2022] Open
Abstract
Strapped acceptor–π–donor–π–acceptor type fluorophores exhibit intense near infrared emission, together with near infrared two-photon absorption.
Fluorophores that can undergo excited-state intramolecular proton transfer (ESIPT) represent promising scaffolds for the design of compounds that show red-shifted fluorescence. Herein, we disclose new near infrared-emissive materials based on a dialkylamine-strapped 2,5-dithienylpyrrole as an ESIPT scaffold. The introduction of electron-accepting units to the terminal positions of this scaffold generates acceptor–π–donor–π–acceptor (A–π–D–π–A) type π-conjugated compounds. Following the ESIPT, the electron-donating ability of the core scaffold increases, which results in a substantially red-shifted emission in the NIR region, while increasing the oscillator strength. The electron-accepting units play a vital role to achieve intense and red-shifted emission from the ESIPT state. The strapped dialkylamine chain that forms an intramolecular hydrogen bond is also essential to induce the ESIPT. Moreover, an extended A–π–D–π–A skeleton enables two-photon excitation with the NIR light. One of the derivatives that satisfy these features, i.e., borylethenyl-substituted 5, exhibited an intense NIR emission in polar solvents such as acetone (λem = 708 nm, ΦF = 0.55) with a strong two-photon-absorption band in the NIR region.
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Affiliation(s)
- Naoya Suzuki
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan
| | - Kayo Suda
- Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya , 464-8602 , Japan
| | - Daisuke Yokogawa
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya , 464-8602 , Japan
| | - Hirotaka Kitoh-Nishioka
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan
| | - Stephan Irle
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya , 464-8602 , Japan
| | - Akihiro Ando
- IFMRI , National Institute of Advanced Industrial Science and Technology (AIST) , 1-8-31 Midorigaoka, Ikeda , Osaka , 563-8577 , Japan
| | - Luis M G Abegão
- IFMRI , National Institute of Advanced Industrial Science and Technology (AIST) , 1-8-31 Midorigaoka, Ikeda , Osaka , 563-8577 , Japan.,Departamento de Física , Universidade Federal de Sergipe , 49100-000 São Cristovão , SE , Brazil
| | - Kenji Kamada
- IFMRI , National Institute of Advanced Industrial Science and Technology (AIST) , 1-8-31 Midorigaoka, Ikeda , Osaka , 563-8577 , Japan
| | - Aiko Fukazawa
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan
| | - Shigehiro Yamaguchi
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya , 464-8602 , Japan
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15
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Khan MFS, Wu J, Liu B, Cheng C, Akbar M, Chai Y, Memon A. Fluorescence and photophysical properties of xylene isomers in water: with experimental and theoretical approaches. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171719. [PMID: 29515881 PMCID: PMC5830770 DOI: 10.1098/rsos.171719] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 01/04/2018] [Indexed: 06/13/2023]
Abstract
A thorough analysis of the photophysical properties involved in electronic transitions in excitation-emission spectra of xylene isomers has been carried out using the time-dependent density functional theory (PBEPBE/6-31 + G(d,p)) method. For the first time a structural and spectroscopic investigation to distinguish isomers of xylene, a widespread priority pollutant, was conducted experimentally and theoretically. The fluorescence properties of xylene isomers (sole and mixture (binary and ternary)) in water were studied. The fluorescence peak intensities of xylenes were linearly correlated to concentration, in the order of p-xylene > o-xylene > m-xylene at an excitation/emission wavelength (ex/em) of 260 nm/285 nm for o-, m-xylene and ex/em 265 nm/290 nm for p-xylene at the same concentration. The theoretical excitation/emission wavelengths were at ex/em 247 nm/267 nm, 248 nm/269 nm and 251 nm/307 nm for o-, m- and p-xylene, respectively. The vertical excitation and emission state energies of p-xylene (ex/em 4.94 eV/4.03 eV) were lower and the internal conversion energy difference (0.90 eV) was higher than those of m-xylene (ex/em 5.00 eV/4.60 eV) (0.4 eV) and o-xylene (ex/em 5.02 eV/4.64 eV) (0.377 eV). The order of theoretical emission and oscillator strength (0.0187 > 0.0175 > 0.0339) for p-xylene > o-xylene > m-xylene was observed to be in agreement with the experimental fluorescence intensities. These findings provide a novel fast method to distinguish isomers based on their photophysical properties.
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Affiliation(s)
| | - Jing Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, People's Republic of China
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16
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An B, Yuan H, Zhu Q, Li Y, Guo X, Zhang J. Theoretical insight into the excited-state intramolecular proton transfer mechanisms of three amino-type hydrogen-bonding molecules. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 175:36-42. [PMID: 28012390 DOI: 10.1016/j.saa.2016.12.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 12/12/2016] [Accepted: 12/14/2016] [Indexed: 06/06/2023]
Abstract
Excited-state intramolecular proton transfer (ESIPT) dynamics of the amino-type hydrogen-bonding compound 2-(2'-aminophenyl)benzothiazole (PBT-NH2) as well as its two derivatives 2-(5'-cyano-2'-aminophenyl)benzothiazole (CN-PBT-NH2) and 2-(5'-cyano-2'-tosylaminophenyl)benzothiazole (CN-PBT-NHTs) were studied by the time-dependent density functional theory (TD-DFT) approach with the B3LYP density functional, and their absorption and emission spectra were also explored at the same level of theory. A good agreement is observed between the theoretical simulations and experimental spectra, indicating that the present calculations are reasonably reliable. In addition, it is also found that the energy barriers of the first excited singlet state of the three targeted molecules along the ESIPT reaction are computed to be 0.38, 0.34 and 0.12eV, respectively, showing the trend of gradual decrease, which implies that the introduction of the electron-withdrawing cyano or tosyl group can facilitate the occurrence of the ESIPT reaction of these amino-type H-bonding systems. Following the ESIPT, both CN-PBT-NH2 and CN-PBT-NHTs dye molecules can undergo the cis-trans isomerization reactions in the ground-state and excited-state potential energy curves along the C2-C3 bond between benzothiazole and phenyl moieties, where the energy barriers of the trans-tautomer→cis-tautomer isomerizations in the ground states are calculated to be 0.83 and 0.34eV, respectively. According to our calculations, it is plausible that there may exist the long-lived trans-tautomer species in the ground states of CN-PBT-NH2 and CN-PBT-NHTs.
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Affiliation(s)
- Beibei An
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Huijuan Yuan
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Qiuling Zhu
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Yuanyuan Li
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Xugeng Guo
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China.
| | - Jinglai Zhang
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China.
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Carayon C, Fery-Forgues S. 2-Phenylbenzoxazole derivatives: a family of robust emitters of solid-state fluorescence. Photochem Photobiol Sci 2017; 16:1020-1035. [DOI: 10.1039/c7pp00112f] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In addition to thermal, chemical and photochemical stability, the 2-phenylbenzoxazole fragment exhibits attractive emission properties in the solid state, thus leading to highly photoluminescent materials and sensors.
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Affiliation(s)
- Chantal Carayon
- SPCMIB
- UMR5068
- CNRS-Université de Toulouse III Paul Sabatier
- Toulouse
- France
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18
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Monçalves M, Zanotto GM, Toldo JM, Rampon DS, Schneider PH, Gonçalves PFB, Rodembusch FS, Silveira CC. Dipolar vinyl sulfur fluorescent dyes. Synthesis and photophysics of sulfide, sulfoxide and sulfone based D–π–A compounds. RSC Adv 2017. [DOI: 10.1039/c6ra27989a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
New vinyl sulfides and sulfoxides were obtained in good yields using the Horner–Wadsworth–Emmons (HWE) reaction.
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Affiliation(s)
- Matias Monçalves
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria-RS
- Brazil
| | - Gabriel M. Zanotto
- Grupo de Química Teórica
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Josene M. Toldo
- Grupo de Química Teórica
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Daniel S. Rampon
- Universidade Federal do Paraná
- Departamento de Química
- Laboratório de Polímeros e Catálise
- Curitiba
- Brazil
| | - Paulo H. Schneider
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Paulo F. B. Gonçalves
- Grupo de Química Teórica
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Fabiano S. Rodembusch
- Grupo de Pesquisa em Fotoquímica Orgânica Aplicada
- Universidade Federal do Rio Grande do Sul – Instituto de Química
- Porto Alegre-RS
- Brazil
| | - Claudio C. Silveira
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria-RS
- Brazil
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19
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Ma C, Liu Y, Li C, Yang Y. The fluorescence quenching phenomenon in newly synthesized blue fluorescence protein molecule caused by anchoring group substitution: a DFT and TD-DFT study. RSC Adv 2017. [DOI: 10.1039/c6ra26470k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The newly synthesized blue fluorescence protein (BFP) molecule combined with its derivatives were fully investigated using DFT and TD-DFT methods.
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Affiliation(s)
- Chi Ma
- College of Physics and Material Science
- Henan Normal University
- Xinxiang 453007
- China
| | - Yufang Liu
- College of Physics and Material Science
- Henan Normal University
- Xinxiang 453007
- China
| | - Chaozheng Li
- College of Physics and Material Science
- Henan Normal University
- Xinxiang 453007
- China
| | - Yonggang Yang
- College of Physics and Material Science
- Henan Normal University
- Xinxiang 453007
- China
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20
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Kluczyk D, Matwijczuk A, Górecki A, Karpińska MM, Szymanek M, Niewiadomy A, Gagoś M. Molecular Organization of Dipalmitoylphosphatidylcholine Bilayers Containing Bioactive Compounds 4-(5-Heptyl-1,3,4-thiadiazol-2-yl) Benzene-1,3-diol and 4-(5-Methyl-1,3,4-thiadiazol-2-yl) Benzene-1,3-diols. J Phys Chem B 2016; 120:12047-12063. [PMID: 27798830 DOI: 10.1021/acs.jpcb.6b09371] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This article presents the results of spectroscopic studies of two compounds from the 1,3,4-thiadiazole group, that is, 4-(5-methyl-1,3,4-thiadiazole-2-yl)benzene-1,3-diol (C1) and 4-(5-heptyl-1,3,4-thiadiazole-2-yl)benzene-1,3-diol (C7), present at different molar concentrations in 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC) liposome systems. In the case of both investigated compounds, fluorescence measurements revealed the presence of several emission bands, whose appearance is related to the molecular organization induced by changes in the phase transition in DPPC. On the basis of the interpretation of Fourier transform infrared spectra, we determined the molecular organization of the analyzed compounds in multilayers formed from DPPC and the 1,3,4-thiadiazoles. It was found that the compound with a longer alkyl substituent both occupied the lipid polar head region in the lipid multilayer and interacted with lipid hydrocarbon chains. In turn, the compound with a shorter alkyl substituent interacted more strongly with the membrane polar region. On the basis of the knowledge from previous investigations conducted using different solvents, the fluorescence effects observed were related to the phenomenon of molecular aggregation. The effects were strongly influenced by the structure of the compound and, primarily, by the type of the alkyl substituent used in the molecule. The substantial shortening of fluorescence lifetimes associated with the effect of long-wave emission (with a maximum at 505 nm) decay also confirms the model of aggregation effects in the analyzed systems. Similar effects can be very easily distinguished and associated with respective forms of the compounds in biologically relevant samples.
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Affiliation(s)
- Dariusz Kluczyk
- Department of Cell Biology, Institute of Biology and Biochemistry, Maria Curie-Skłodowska University , 20-033 Lublin, Poland
| | | | - Andrzej Górecki
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology of the Jagiellonian University , Gronostajowa 7, 30-387 Krakow, Poland
| | - Monika M Karpińska
- Institute of Industrial Organic Chemistry , Annopol 6, 03-236 Warsaw, Poland
| | | | - Andrzej Niewiadomy
- Institute of Industrial Organic Chemistry , Annopol 6, 03-236 Warsaw, Poland
| | - Mariusz Gagoś
- Department of Cell Biology, Institute of Biology and Biochemistry, Maria Curie-Skłodowska University , 20-033 Lublin, Poland
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21
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Zhao J, Chen J, Liu J, Hoffmann MR. Competitive excited-state single or double proton transfer mechanisms for bis-2,5-(2-benzoxazolyl)-hydroquinone and its derivatives. Phys Chem Chem Phys 2016; 17:11990-9. [PMID: 25872615 DOI: 10.1039/c4cp05651e] [Citation(s) in RCA: 221] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The excited state intramolecular proton transfer (ESIPT) mechanisms of 2-(2-hydroxyphenyl)benzoxazole (HBO), bis-2,5-(2-benzoxazolyl)-hydroquinone (BBHQ) and 2,5-bis(5'-tert-butyl-benzoxazol-2'-yl)hydroquinone (DHBO) have been investigated using time-dependent density functional theory (TDDFT). The calculated vertical excitation energies based on the TDDFT method reproduced the experimental absorption and emission spectra well. Three kinds of stable structures were found on the S1 state potential energy surface (PES). A new ESIPT mechanism that differs from the one proposed previously (Mordzinski et al., Chem. Phys. Lett., 1983, 101, 291. and Lim et al., J. Am. Chem. Soc., 2006, 128, 14542.) is proposed. The new mechanism includes the possibility of simultaneous double proton transfer, or successive single transfers, in addition to the accepted single proton transfer mechanism. Hydrogen bond strengthening in the excited state was based on primary bond lengths, angles, IR vibrational spectra and hydrogen bond energy. Intramolecular charge transfer based on the frontier molecular orbitals (MOs) also supports the proposed mechanism of the ESIPT reaction. To further elucidate the proposed mechanism, reduced dimensionality PESs of the S0 and S1 states were constructed by keeping the O-H distance fixed at a series of values. The potential barrier heights among the local minima on the S1 surface imply competitive single and double proton transfer branches in the mechanism. Based on the new ESIPT mechanism, the observed fluorescence quenching can be satisfactorily explained.
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Affiliation(s)
- Jinfeng Zhao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, China.
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22
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Azarias C, Budzák Š, Laurent AD, Ulrich G, Jacquemin D. Tuning ESIPT fluorophores into dual emitters. Chem Sci 2016; 7:3763-3774. [PMID: 29997864 PMCID: PMC6008603 DOI: 10.1039/c5sc04826e] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 02/23/2016] [Indexed: 12/24/2022] Open
Abstract
Using first-principle approaches, we show how ESIPT can be controlled by fine-tuning of substituents, hence leading to new dual emitters.
Dyes undergoing excited-state intramolecular proton transfer (ESIPT) are known to present large Stokes shifts as a result of the important geometrical reorganisation following photon absorption. When the ESIPT process is not quantitative, one can obtain dual emitters characterised by two distinct fluorescence bands, observed due to emissions from both the canonical and ESIPT isomers. However, dual emission generally requires to maintain a very specific balance, as the relative excited-state free energies of the two tautomers have to be within a narrow window to observe the phenomenon. Consequently, simple chemical intuition is insufficient to optimise dual emission. In the present contribution, we investigate, with the help of quantum-mechanical tools and more precisely, time-dependent density functional theory (TD-DFT) and algebraic diagrammatic construction (ADC), a wide panel of possible ESIPT/dual emitters with various substituents. The selected protocol is first shown to be very robust on a series of structures with known experimental behaviour, and next is applied to novel derivatives with various substituents located at different positions. This work encompasses the largest chemical library of potential ESIPT compounds studied to date. We pinpoint the most promising combinations for building dual emitters, highlight unexpected combination effects and rationalise the impact of the different auxochromes.
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Affiliation(s)
- Cloé Azarias
- CEISAM , UMR CNRS 6230 , Université de Nantes , BP 92208, 2, Rue de la Houssinière , 44322 Nantes, Cedex 3 , France . ; Tel: +33-2-51-12-55-64
| | - Šimon Budzák
- CEISAM , UMR CNRS 6230 , Université de Nantes , BP 92208, 2, Rue de la Houssinière , 44322 Nantes, Cedex 3 , France . ; Tel: +33-2-51-12-55-64
| | - Adèle D Laurent
- CEISAM , UMR CNRS 6230 , Université de Nantes , BP 92208, 2, Rue de la Houssinière , 44322 Nantes, Cedex 3 , France . ; Tel: +33-2-51-12-55-64
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l'Energie , l'Environnement et la Santé (ICPEES) UMR7515 CNRS Université de Strasbourg , 25 rue Becquerel , 67087 Strasbourg Cedex 02 , France
| | - Denis Jacquemin
- CEISAM , UMR CNRS 6230 , Université de Nantes , BP 92208, 2, Rue de la Houssinière , 44322 Nantes, Cedex 3 , France . ; Tel: +33-2-51-12-55-64.,Institut Universitaire de France , 1, rue Descartes , F-75005 Paris Cedex 05 , France
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23
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Chai S, Wang J, Zhu SY, Cong SL. Hydrogen-bonding dynamics of photoexcited coumarin 138 and 339 in protic methanol solution: Time-dependent density functional theory study. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Laurent AD, Adamo C, Jacquemin D. Dye chemistry with time-dependent density functional theory. Phys Chem Chem Phys 2015; 16:14334-56. [PMID: 24548975 DOI: 10.1039/c3cp55336a] [Citation(s) in RCA: 233] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this perspective, we present an overview of the determination of excited-state properties of "real-life" dyes, and notably of their optical absorption and emission spectra, performed during the last decade with time-dependent density functional theory (TD-DFT). We discuss the results obtained with both vertical and adiabatic (vibronic) approximations, choosing relevant examples for several series of dyes. These examples include reproducing absorption wavelengths of numerous families of coloured molecules, understanding the specific band shape of amino-anthraquinones, optimising the properties of dyes used in solar cells, mimicking the fluorescence wavelengths of fluorescent brighteners and BODIPY dyes, studying optically active biomolecules and photo-induced proton transfer, as well as improving the properties of photochromes.
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Affiliation(s)
- Adèle D Laurent
- Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation (CEISAM), UMR CNRS no. 6230, BP 92208, Université de Nantes, 2, Rue de la Houssinière, 44322 Nantes, Cedex 3, France.
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25
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Wang Y, Shi Y, Cong L, Li H. TDDFT study of twisted intramolecular charge transfer and intermolecular double proton transfer in the excited state of 4'-dimethylaminoflavonol in ethanol solvent. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:913-918. [PMID: 25282020 DOI: 10.1016/j.saa.2014.09.024] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/24/2014] [Accepted: 09/11/2014] [Indexed: 06/03/2023]
Abstract
Time-dependent density functional theory method at the def-TZVP/B3LYP level was employed to investigate the intramolecular and intermolecular hydrogen bonding dynamics in the first excited (S1) state of 4'-dimethylaminoflavonol (DMAF) monomer and in ethanol solution. In the DMAF monomer, we demonstrated that the intramolecular charge transfer (ICT) takes place in the S1 state. This excited state ICT process was followed by intramolecular proton transfer. Our calculated results are in good agreement with the mechanism proposed in experimental work. For the hydrogen-bonded DMAF-EtOH complex, it was demonstrated that the intermolecular hydrogen bonds can induce the formation of the twisted intramolecular charge transfer (TICT) state and the conformational twisting is along the C3-C4 bond. Moreover, the intermolecular hydrogen bonds can also facilitate the intermolecular double proton transfer in the TICT state. A stepwise intermolecular double proton transfer process was revealed. Therefore, the intermolecular hydrogen bonds can alter the mechanism of intramolecular charge transfer and proton transfer in the excited state for the DMAF molecule.
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Affiliation(s)
- Ye Wang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Ying Shi
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China.
| | - Lin Cong
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Hui Li
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
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26
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Electrochemistry and electrogenerated chemiluminescence of benzoxazole derivatives in nonaqueous media. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2014.12.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Rauf MA, Hisaindee S, Saleh N. Spectroscopic studies of keto–enol tautomeric equilibrium of azo dyes. RSC Adv 2015. [DOI: 10.1039/c4ra16184j] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Keto–enol tautomeric equilibrium of an azo dye is shifted to the keto form as the solvent polarity is increased.
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Affiliation(s)
- M. A. Rauf
- Chemistry Department
- UAE University
- Al-Ain
- United Arab Emirates
| | - S. Hisaindee
- Chemistry Department
- UAE University
- Al-Ain
- United Arab Emirates
| | - N. Saleh
- Chemistry Department
- UAE University
- Al-Ain
- United Arab Emirates
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28
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Wang Y, Li H, Shi Y. Evidence for hydrogen-bonded ammonia wire influencing the ESMPT process of the 7-hydroxy-4-methylcoumarin·(NH3)3 cluster. NEW J CHEM 2015. [DOI: 10.1039/c5nj01079a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The different types of excited-state hydrogen-bonded dynamics mechanisms orderly provide two driving forces for the excited-state multiple proton transfer (ESMPT) reaction of the 7H4MC·(NH3)3 cluster.
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Affiliation(s)
- Ye Wang
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Hui Li
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Ying Shi
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
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29
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Houari Y, Chibani S, Jacquemin D, Laurent AD. TD-DFT Assessment of the Excited State Intramolecular Proton Transfer in Hydroxyphenylbenzimidazole (HBI) Dyes. J Phys Chem B 2014; 119:2180-92. [DOI: 10.1021/jp505036d] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ymène Houari
- Laboratoire
CEISAM - UMR CNR 6230, Université de Nantes, 2 Rue de la
Houssinière, BP 92208, 44322 Nantes Cedex 3, France
| | - Siwar Chibani
- Laboratoire
CEISAM - UMR CNR 6230, Université de Nantes, 2 Rue de la
Houssinière, BP 92208, 44322 Nantes Cedex 3, France
| | - Denis Jacquemin
- Laboratoire
CEISAM - UMR CNR 6230, Université de Nantes, 2 Rue de la
Houssinière, BP 92208, 44322 Nantes Cedex 3, France
- Institut Universitaire
de France, 103, bd Saint-Michel, F-75005 Paris Cedex 05, France
| | - Adèle D. Laurent
- Laboratoire
CEISAM - UMR CNR 6230, Université de Nantes, 2 Rue de la
Houssinière, BP 92208, 44322 Nantes Cedex 3, France
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30
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Roohi H, Mohtamedifar N, Hejazi F. Intramolecular photoinduced proton transfer in 2-(2′-hydroxyphenyl)benzazole family: A TD-DFT quantum chemical study. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.10.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Houari Y, Charaf-Eddin A, Laurent AD, Massue J, Ziessel R, Ulrich G, Jacquemin D. Modeling optical signatures and excited-state reactivities of substituted hydroxyphenylbenzoxazole (HBO) ESIPT dyes. Phys Chem Chem Phys 2014; 16:1319-21. [PMID: 24309560 DOI: 10.1039/c3cp54703e] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The potential energy surfaces of dyes displaying strong excited-state intramolecular proton transfer (ESIPT) are investigated with the help of ab initio tools. It allows us to rationalize the interplay between the excited-state transition free energies and the observed optical signatures.
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Affiliation(s)
- Ymène Houari
- CEISAM, UMR CNRS 6230, Université de Nantes, 2, Rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France.
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32
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Laurent AD, Jacquemin D. Analyzing excited-state processes and optical signatures of a ratiomeric fluorine anion sensor: a quantum look. Sci China Chem 2014. [DOI: 10.1007/s11426-014-5156-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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33
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Daengngern R, Kungwan N. Dynamics simulations of photoinduced proton transfer reactions of 2-(2′-hydroxyphenyl)benzoxazole in the gas phase and its hydrated clusters. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.06.041] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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34
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Chai S, Cong SL. Intermolecular hydrogen bond and twisted intramolecular charge transfer in excited state of fast violet B (FVB) in methanol solution. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 125:67-72. [PMID: 24531106 DOI: 10.1016/j.saa.2014.01.092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 01/13/2014] [Accepted: 01/19/2014] [Indexed: 06/03/2023]
Abstract
The excited state hydrogen bonding dynamics and corresponding photophysical processes of fast violet B (FVB) in hydrogen-donating methanol (MeOH) solution are investigated by using time-dependent density functional theory (TDDFT) method. In the FVB molecule, there are -C=O, -N-H groups which could act as hydrogen acceptor and donor. It is demonstrated that both the intramolecular hydrogen bond O⋯H-N in FVB and intermolecular hydrogen bond C=O⋯H-O between FVB and MeOH are formed in the ground state S0 and strengthened in the excited state S1. The absorption spectra are obviously red shifted for the hydrogen-bonded complex in comparison with FVB monomer in the low energy range. The theoretical investigation demonstrates that the twisted intramolecular charge transfer takes place in the excited states for both isolated FVB and hydrogen-bonded complex, and the dominant twisting is along N2-C3 bond. The potential energy curve is investigated to understand the photophysics process of FVB and hydrogen-bonded complex.
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Affiliation(s)
- Shuo Chai
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China; State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Shu-Lin Cong
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
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35
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Chai S, Cong SL. Excited state intramolecular proton transfer and substituent effect of 10-hydroxybenzo[h]quinoline: A time-dependent density functional theory study. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.02.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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