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Zhou X, Wang X, Cui X, Zhao Y, Zhang C, Meng X, Wang Q, Zhou J, Meng Q. Theoretical Insights into the Effect of Different Numbers of Thiophene Groups on Hydrogen Bond Interaction and Excited-State Intramolecular Proton-Transfer Process for Flavonoid Derivatives. J Phys Chem A 2024; 128:4020-4029. [PMID: 38743255 DOI: 10.1021/acs.jpca.4c02029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
In this study, we systematically explored the impact of varying the number of thiophene groups on the hydrogen bond interaction and excited-state intramolecular proton-transfer (ESIPT) processes in flavonoid derivatives (STF, DTF, and TTF) using the density functional theory and time-dependent density functional theory methods. Initially, a thorough analysis of the optimized geometric structures revealed that the intramolecular hydrogen bond in the S1 state is enhanced and gradually weakened as the number of thiophene groups increases. To gain a deeper understanding of the hydrogen bond interaction, topological analysis, interaction region indicator scatter plots, and isosurface plots were employed. These images provide further insights that align with the structural analysis. Additionally, we observed a red-shift in the electronic spectra (absorption and fluorescence spectra), which is primarily attributed to the narrowing of the energy gap between the highest occupied molecular orbital and the lowest unoccupied molecular orbital, as elucidated by the frontier molecular orbitals. Furthermore, a combined analysis between the hole-electron distribution and the transition density matrix heat map shows that electron excitation involves the unidirectional charge-transfer mechanism. In the end, by conducting relaxed potential energy curve scans, we found that an increase in the number of thiophene groups elevates the energy barrier for ESIPT, making it more challenging for the reaction. In summary, our study underscores the vital effect of thiophene-substituted numbers in modulating the ESIPT process, which is able to provide valuable insights for the design and synthesis of desired organic fluorescent probes in the future.
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Affiliation(s)
- Xucong Zhou
- School of Basic Medical Sciences, School of Public Health, School of Pharmacy, Shandong Second Medical University, Weifang 261053, China
| | - Xin Wang
- School of Basic Medical Sciences, School of Public Health, School of Pharmacy, Shandong Second Medical University, Weifang 261053, China
| | - Xixi Cui
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Yu Zhao
- College of Physical Science and Technology, Bohai University, Jinzhou 121013, China
| | - Changzhe Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Xiangguo Meng
- School of Basic Medical Sciences, School of Public Health, School of Pharmacy, Shandong Second Medical University, Weifang 261053, China
| | - Qinghua Wang
- School of Basic Medical Sciences, School of Public Health, School of Pharmacy, Shandong Second Medical University, Weifang 261053, China
| | - Jin Zhou
- School of Basic Medical Sciences, School of Public Health, School of Pharmacy, Shandong Second Medical University, Weifang 261053, China
| | - Qingtian Meng
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
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Colín M, Aguilar MÁ, Martín ME. A Theoretical Study of Solvent Effects on the Structure and UV-vis Spectroscopy of 3-Hydroxyflavone (3-HF) and Some Simplified Molecular Models. ACS OMEGA 2023; 8:19939-19949. [PMID: 37305262 PMCID: PMC10249394 DOI: 10.1021/acsomega.3c01906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/10/2023] [Indexed: 06/13/2023]
Abstract
Solvent effects on the UV-vis spectra of 3-hydroxyflavone and other structurally related molecules (3-hydroxychromen-4-one, 3-hydroxy-4-pyrone, and 4-pyrone) have been studied by combining time-dependent density functional theory (TDDFT) and the polarizable continuum method (PCM). Among the first five excited states of the four considered molecules, electronic states of n → π* and π → π* nature appear. In general, the stability of the n → π* states decreases as the π space becomes larger in such a way that only for 4-pyrone and 3-hydroxy-4-pyrone are they the first excited states. In addition, they become less stabilized in ethanol solution than the ground state, and this causes blueshift transitions in solution. The opposite trend is found for the π → π* excited states. They are less energetic with the π-system size and when passing from gas phase to solution. The solvent shift also depends strongly on the size of the π systems and on the formation of an intramolecular hydrogen bond; thus, it decreases when going from 4-pyrone to 3-hydroxyflavone. The performance of the three versions (cLR, cLR2, and IBSF) of the specific-state PCM method in predicting transition energies are compared.
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Affiliation(s)
- María
Jesús Colín
- Área
de Química-Física, Facultad de Ciencias, Universidad de Extremadura, Avda. de Elvas, 06006 Badajoz, Spain
| | - Manuel Ángel Aguilar
- Área
de Química-Física, Facultad de Ciencias, Universidad de Extremadura, Avda. de Elvas, 06006 Badajoz, Spain
- Instituto
de Computación Científica Avanzada (ICCAEx), Universidad
de Extremadura, Avda.
de Elvas, 06006 Badajoz, Spain
| | - M. Elena Martín
- Área
de Química-Física, Facultad de Ciencias, Universidad de Extremadura, Avda. de Elvas, 06006 Badajoz, Spain
- Instituto
de Computación Científica Avanzada (ICCAEx), Universidad
de Extremadura, Avda.
de Elvas, 06006 Badajoz, Spain
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Lin MY, Li Y, Fu CB, Yu XF. Modulating the ESIPT dynamics of 3HF derivatives via substitution and solvent effect: A theoretical study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Feng W, Xie Q, Li W, Gao J, Liang J, Jiang M. Ultraviolet resistance modification of poly(1,3,4‐oxadiazole) fibers by dihydroxyterephthalic acid. J Appl Polym Sci 2022. [DOI: 10.1002/app.52427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wenjie Feng
- College of Polymer Science and Engineering Sichuan University Chengdu China
| | - Qibao Xie
- College of Polymer Science and Engineering Sichuan University Chengdu China
| | - Wentao Li
- College of Polymer Science and Engineering Sichuan University Chengdu China
| | - Jian Gao
- College of Polymer Science and Engineering Sichuan University Chengdu China
| | - Jinsong Liang
- College of Polymer Science and Engineering Sichuan University Chengdu China
| | - Mengjin Jiang
- College of Polymer Science and Engineering Sichuan University Chengdu China
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Hao J, Yang Y. Unveiling the effect of solvent polarity on the excited state intramolecular proton transfer mechanism of new 3-hydroxy-4-pyridylisoquinoline compound. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 232:118082. [PMID: 32086041 DOI: 10.1016/j.saa.2020.118082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/18/2020] [Accepted: 01/18/2020] [Indexed: 06/10/2023]
Abstract
The new 3-hydroxy-4-pyridylisoquinoline compound is attractive and promising lead structure in drug discovery. The pronounced sensitivity of its emission property toward solvent polarity effect was presented in experiment (J. Org. Chem, 2019, 84, 3011). Nevertheless, the experiment was lack of solvent polarity effect on the excited state intramolecular proton transfer (ESIPT) mechanism in detail. In this study, the ESIPT process of this molecule in different polarity solvents were comprehensively expounded by density functional theory (DFT) and time-dependent DFT (TDDFT) methods. In order to ensure the accuracy of the experiment and roundly explore in theoretical level, two ESIPT pathways (1 and 2) based on the N1 and N2 forms of studied molecule were proposed, among which the ESIPT pathway 1 was derived from experiment. The calculated electronic spectrum of both N1 and N2 forms were rather comparable with the experiment. The calculated intramolecular hydrogen bond (IHB) parameters and infrared (IR) vibration spectra determined the enhancement of IHBs at the S1 state under different solvents for both N1 and N2 forms. The frontier molecular orbitals (FMOs) analysis proved that the intramolecular charge transfer (ICT) taken place during photoexcitation. The potential energy curves (PECs) at the S0 and S1 states were constructed to illustrate the solvent polarity effect on ESIPT mechanism. According to potential energy barriers (PEBs) on the PECs at S1 state, it is concluded that the ESIPT pathway 1 was forbidden with exceedingly high PEBs (24.585-25.322 kcal/mol), while the ESIPT pathway 2 was feasible with enough low PEBs (0.100-0.510 kcal/mol), which suggested the inconsequence of the experiment. Based on the PEBs of ESIPT pathway 2 in different solvent, the effect of solvent polarity on ESIPT mechanism was depicted. The results are as follows: the S1 state IHB intensity was enhanced with increasing solvent polarity; the extent of ICT was decreased with the increment of solvent polarity; the S1 state PEB was decreased as the solvent polarity increased. Indeed in short, the ESIPT reaction became more and more likely as the solvent polarity enhanced. We believe that this investigation will be useful to the utilization and development of property for such photochemical substances.
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Affiliation(s)
- Jiaojiao Hao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yang Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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Anand N, Nag P, Kanaparthi RK, Vennapusa SR. O-H vibrational motions promote sub-50 fs nonadiabatic dynamics in 3-hydroxypyran-4-one: interplay between internal conversion and ESIPT. Phys Chem Chem Phys 2020; 22:8745-8756. [PMID: 32282004 DOI: 10.1039/d0cp00741b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theoretical study is used to explore the involvement of O-H vibrational motions in the S0 → S2 photoinduced dynamics of 3-hydroxypyran-4-one (3-HOX). Two transitions, S0 → S1 and S0 → S2, are attributed to the experimentally observed electronic absorption spectral features in the range of 3.5-5.5 eV. We compute model potential energy surfaces of vibronically coupled S1 (nπ*) and S2 (ππ*) states with the aid of extensive electronic structure calculations. The S1-S2 conical intersection is characterized in the O-H bend and O-H stretch vibrational coordinate space. Quantum wavepacket dynamics simulations reveal an ultrafast S2 → S1 internal conversion decay, where about 90% of the S2 population disappears within the first 50 fs of the propagation time. The participation of O-H vibrational motions in the early events of nonadiabatic dynamics is analyzed based on the time evolution of nuclear densities on S2. We discuss the implications of these observations to provide fundamental insights into the nonadiabatic excited-state intramolecular proton transfer in 3-HOX and its derivatives.
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Affiliation(s)
- Neethu Anand
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram (IISER TVM), Maruthamala P.O, Vithura, Thiruvananthapuram-695551, Kerala, India.
| | - Probal Nag
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram (IISER TVM), Maruthamala P.O, Vithura, Thiruvananthapuram-695551, Kerala, India.
| | - Ravi Kumar Kanaparthi
- Department Of Chemistry, School Of Physical Sciences, Central University of Kerala, Tejaswini Hills, Periya, Kerala - 671320, India.
| | - Sivaranjana Reddy Vennapusa
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram (IISER TVM), Maruthamala P.O, Vithura, Thiruvananthapuram-695551, Kerala, India.
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Ingeniously regulating the antioxidant activities of hydroxyanthraquinone-based compounds via ESIPT reaction: Combining experiment and theory methods. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111937] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Sun C, Su X, Zhou Q, Shi Y. Regular tuning of the ESIPT reaction of 3-hydroxychromone-based derivatives by substitution of functional groups. Org Chem Front 2019. [DOI: 10.1039/c9qo00722a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The electron-withdrawing ability of an atom and length of substitution groups would affect the ESIPT reaction and photophysical properties of 3-hydroxychromone-based derivatives.
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Affiliation(s)
- Chaofan Sun
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Xing Su
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Qiao Zhou
- 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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