1
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Lamas I, Montero R, Martínez-Martínez V, Longarte A. Photodynamics of azaindoles in polar media: the influence of the environment. Phys Chem Chem Phys 2024; 26:3240-3252. [PMID: 38193884 DOI: 10.1039/d3cp03412g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
We have studied the relaxation dynamics of a family of azaindole (AI) structural isomers, 4-, 5-, 6- and 7-AI, by steady-state and time-resolved methods (fs-transient absorption and fluorescence up-conversion), in solvents of different polarity. The measurements in aprotic solvents show distinctive fluorescence yields and excited state lifetimes among the isomers, which are tuned by the polarity of the medium. Guided by simple TD-DFT calculations and based on the behavior observed in the isolated species, it has been possible to address the influence of the environment polarity on the relaxation route. According to the obtained picture, the energy of the nπ* state, which is strongly dependent on the position of the pyridinic nitrogen, controls the rate of the internal conversion channel that accounts for the distinctive photophysical behavior of the isomers. On the other hand, preliminary measurements in protic media (methanol) show a very different photodynamical behavior, in which the anomalous measured fluorescent patterns are very likely the result of reactive channels (proton transfer) triggered by the electronic excitation.
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Affiliation(s)
- Iker Lamas
- Departamento de Química-Física Facultad de Ciencia y Tecnología. Universidad del País Vasco (UPV/EHU) Apart. 644, 48080 Bilbao, Spain.
| | - Raúl Montero
- SGIKER Laser Facility Facultad de Ciencia y Tecnología. Universidad del País Vasco (UPV/EHU) 48940, Leioa, Spain.
| | - Virginia Martínez-Martínez
- Departamento de Química-Física Facultad de Ciencia y Tecnología. Universidad del País Vasco (UPV/EHU) Apart. 644, 48080 Bilbao, Spain.
| | - Asier Longarte
- Departamento de Química-Física Facultad de Ciencia y Tecnología. Universidad del País Vasco (UPV/EHU) Apart. 644, 48080 Bilbao, Spain.
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2
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A combined theoretical and experimental study of photo-induced intramolecular hydrogen transfer of 2,4,6-trinitrotoluene. FIREPHYSCHEM 2022. [DOI: 10.1016/j.fpc.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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3
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Mansour R, Mukherjee S, Pinheiro M, Noble JA, Jouvet C, Barbatti M. Pre-Dewar structure modulates protonated azaindole photodynamics. Phys Chem Chem Phys 2022; 24:12346-12353. [PMID: 35546500 DOI: 10.1039/d2cp01056a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Recent experimental work revealed that the lifetime of the S3 state of protonated 7-azaindole is about ten times longer than that of protonated 6-azaindole. We simulated the nonradiative decay pathways of these molecules using trajectory surface hopping dynamics after photoexcitation into S3 to elucidate the reason for this difference. Both isomers mainly follow a common ππ* relaxation pathway involving multiple state crossings while coming down from S3 to S1 in the subpicosecond time scale. However, the simulations reveal that the excited-state topographies are such that while the 6-isomer can easily access the region of nonadiabatic transitions, the internal conversion of the 7-isomer is delayed by a pre-Dewar bond formation with a boat conformation.
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Affiliation(s)
- Ritam Mansour
- Aix Marseille University, CNRS, ICR, Marseille, France.
| | | | - Max Pinheiro
- Aix Marseille University, CNRS, ICR, Marseille, France.
| | | | | | - Mario Barbatti
- Aix Marseille University, CNRS, ICR, Marseille, France. .,Institut Universitaire de France, 75231 Paris, France.
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4
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Fu CB, Qu JJ, Yu XF, Cheng JB, Li Q. Triple proton transfer after water rearrangement in (2,6-aza)Ind·(H2O)2. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Danilkina NA, Andrievskaya EV, Vasileva AV, Lyapunova AG, Rumyantsev AM, Kuzmin AA, Bessonova EA, Balova IA. 4-Azidocinnoline-Cinnoline-4-amine Pair as a New Fluorogenic and Fluorochromic Environment-Sensitive Probe. Molecules 2021; 26:7460. [PMID: 34946541 PMCID: PMC8704291 DOI: 10.3390/molecules26247460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 12/01/2021] [Accepted: 12/06/2021] [Indexed: 12/03/2022] Open
Abstract
A new type of fluorogenic and fluorochromic probe based on the reduction of weakly fluorescent 4-azido-6-(4-cyanophenyl)cinnoline to the corresponding fluorescent cinnoline-4-amine was developed. We found that the fluorescence of 6-(4-cyanophenyl)cinnoline-4-amine is strongly affected by the nature of the solvent. The fluorogenic effect for the amine was detected in polar solvents with the strongest fluorescence increase in water. The environment-sensitive fluorogenic properties of cinnoline-4-amine in water were explained as a combination of two types of fluorescence mechanisms: aggregation-induced emission (AIE) and excited state intermolecular proton transfer (ESPT). The suitability of an azide-amine pair as a fluorogenic probe was tested using a HepG2 hepatic cancer cell line with detection by fluorescent microscopy, flow cytometry, and HPLC analysis of cells lysates. The results obtained confirm the possibility of the transformation of the azide to amine in cells and the potential applicability of the discovered fluorogenic and fluorochromic probe for different analytical and biological applications in aqueous medium.
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Affiliation(s)
- Natalia A. Danilkina
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia; (N.A.D.); (A.V.V.); (A.G.L.); (E.A.B.)
| | | | - Anna V. Vasileva
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia; (N.A.D.); (A.V.V.); (A.G.L.); (E.A.B.)
| | - Anna G. Lyapunova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia; (N.A.D.); (A.V.V.); (A.G.L.); (E.A.B.)
| | - Andrey M. Rumyantsev
- Department of Genetics and Biotechnology, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia;
| | - Andrey A. Kuzmin
- Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Tikhoretsky Avenue 4, 194064 Saint Petersburg, Russia;
| | - Elena A. Bessonova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia; (N.A.D.); (A.V.V.); (A.G.L.); (E.A.B.)
| | - Irina A. Balova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia; (N.A.D.); (A.V.V.); (A.G.L.); (E.A.B.)
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6
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Ullah N, Chen S, Zhang R. Adenine ultrafast photorelaxation via electron-driven proton transfer. Phys Chem Chem Phys 2021; 23:23090-23095. [PMID: 34617085 DOI: 10.1039/d1cp03162g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photorelaxation of adenine in water was reported to be ultrafast (within 180 fs) primarily due to radiationless relaxation. However, in the last two decades, several experimental and theoretical investigations on photoexcitation of adenine have revealed diverse types of decay mechanisms. Using time-dependent density functional excited-state nonadiabatic dynamics simulations we show that it is the water to adenine electron-driven proton transfer (EDPT) barrierless reaction responsible for the ultrafast component of the adenine relaxation, which, however, occurred only in the case of the 7H isomer of adenine with five water molecules. This result reveals a known reaction pathway, however not found in previous simulations, with inference for the ultrafast relaxation mechanisms of adenine reported in experiments. The 9H isomer of adenine with six water molecules relaxing in a water cluster followed the previously known structural distortion (C2) decay pathway. The observations of the adenine EDPT reaction with water provide the origin of the experimental ultrafast adenine decay component and present a possible method to tackle future computational challenges in molecular-level biological processes.
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Affiliation(s)
- Naeem Ullah
- Department of Physics, City University of Hong Kong, Hong Kong SAR, China.
| | - Shunwei Chen
- School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Ruiqin Zhang
- Department of Physics, City University of Hong Kong, Hong Kong SAR, China. .,Beijing Computational Science Research Center, Beijing 100193, China
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7
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Chaihan K, Bui TT, Goubard F, Kungwan N. Tunable keto emission of 2-(2′-hydroxyphenyl)benzothiazole derivatives with π-expansion, substitution and additional proton transfer site for excited-state proton transfer-based fluorescent probes: Theoretical insights. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113450] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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8
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Chansen W, Kungwan N. Theoretical Insights into Excited-State Intermolecular Proton Transfers of 2,7-Diazaindole in Water Using a Microsolvation Approach. J Phys Chem A 2021; 125:5314-5325. [PMID: 34125551 DOI: 10.1021/acs.jpca.1c03120] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The detailed excited-state intermolecular proton transfer (ESInterPT) mechanism of 2,7-diazaindole with water wires consisting of either one or two shells [2,7-DAI(H2O)n; n = 1-5] has been theoretically explored by time-dependent density functional theory using microsolvation with an implicit solvent model. On the basis of the excited-state potential energy surfaces along the proton transfer (PT) coordinates, among all 2,7-DAI(H2O)n, the multiple ESInterPT of 2,7-DAI(H2O)2+3 through the first hydration shell (inner circuit) is the most easy process to occur with the lowest PT barrier and a highly exothermic reaction. The lowest PT barrier resulted from the outer three waters pushing the inner circuit waters to be much closer to 2,7-DAI, leading to the enhanced intermolecular hydrogen-bonding strength of the inner two waters. Moreover, on-the-fly dynamic simulations show that the multiple ESInterPT mechanism of 2,7-DAI(H2O)2+3 is the triple PT in a stepwise mechanism with the highest PT probability. This solvation effect using microsolvation and dynamic simulation is a cost-effect approach to reveal the solvent-assisted multiple proton relay of chromophores based on excited-state proton transfer.
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Affiliation(s)
- Warinthon Chansen
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Graduate School, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Nawee Kungwan
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Center of Excellence in Material Science and Technology, Chiang Mai University, Chiang Mai 50200, Thailand
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9
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Mawa I, Panda AN. Insights into the Excited-State Processes in 1-Hydroxy-2-acetonaphthone at ADC(2) and CASSCF Levels. J Phys Chem A 2021; 125:3015-3024. [PMID: 33818112 DOI: 10.1021/acs.jpca.1c02349] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
1-Hydroxy-2-acetonaphthone (HAN) has been extensively studied both experimentally and computationally to ascertain the existence of the excited-state proton transfer process. However, the process of full photocycle including the nonradiative relaxation pathways is yet to be proposed. Therefore, in the present study, we aim at providing a comprehensive picture of the excited-state processes in HAN including the proton transfer and relaxation processes through electronic structure calculations at second-order algebraic diagrammatic construction (ADC(2)) and complete active space second-order perturbation theory (CASPT2)//complete active space self-consistent field (CASSCF) and dynamics simulations at ADC(2) levels. Our studies show that the proton transfer process in the S1 state is barrierless and produces a stable keto form, which is in accordance with previous experimental and computational studies. Adiabatic dynamics simulations at the ADC(2) level confirmed the ultrafast process with an average proton transfer time of 43 fs. The resultant keto conformer then undergoes torsional rotation, leading to a conical intersection that mediates the internal conversion process to the ground state. Our dynamics simulation predicted that this deactivation process occurs at a time scale beyond 600 fs of simulation time. We also explored nonradiative relaxation from the enol Franck-Condon region, and this process was found to be improbable from the static point of view at both the ADC(2) and CASPT2 levels of theory due to a high energy barrier along the torsional coordinate.
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Affiliation(s)
- Ibanrishisha Mawa
- Department of Chemistry, Indian Institute of Technology, Guwahati 781039, India
| | - Aditya N Panda
- Department of Chemistry, Indian Institute of Technology, Guwahati 781039, India
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10
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Yi J, Fang H. Effect of water on excited‐state double proton transfer in 7‐azaindole‐H
2
O complex: A theoretical study. J PHYS ORG CHEM 2020. [DOI: 10.1002/poc.4060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jiacheng Yi
- Department of Chemistry and Material Science, College of ScienceNanjing Forestry University Nanjing China
| | - Hua Fang
- Department of Chemistry and Material Science, College of ScienceNanjing Forestry University Nanjing China
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11
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Sarkar A, Pyne DK, Biswas T, Das R, Kar GK, Halder A. Tunable luminescence of a synthesized furophenanthraquinone derivative: interactions with different solvents. LUMINESCENCE 2020; 35:709-720. [PMID: 32000298 DOI: 10.1002/bio.3776] [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: 07/16/2019] [Revised: 11/21/2019] [Accepted: 01/02/2020] [Indexed: 11/07/2022]
Abstract
The synthesis is described of a luminescent furophenanthraquinone derivative, 9-methoxyphenanthro[4,3-b]furan-4,5-dione (MPFD). The biological importance of tetracyclic furophenanthraquinones was considered and the tunable luminescence of MPFD in different solvents was studied to explore the nature of the specific interactions between MPFD and solvents. Observation of dual emission bands and identical nature of the fluorescence excitation spectra of MPFD monitored at the emission wavelength in polar solvents indicated the formation of two different types of species in the excited state, probably due to proton transfer from the solvent to MPFD. Luminescence intensity due to anionic species was found to be increased and the corresponding peak was red shifted with increase in the proton-donating ability of the solvents, acting as an acid with respect to MPFD. Availability of more acidic protons in the solvent facilitated this phenomenon occurring in the excited state. MPFD also interacted with halogen-containing solvents by forming electron donor-acceptor charge transfer (CT) complexes. This CT complex formation was dependent on the number of chlorine atoms; the position of the corresponding luminescence band varied with the polarity of the solvent. Extent of the CT increased with increase in the number of chlorine atoms in the dichloro, trichloro and tetrachloro solvents, whereas the luminescence peak due to the CT complex was found to be blue shifted with decrease in solvent polarity. Interaction of the synthesized bioactive MPFD with different solvents deserves biological importance as proton transfer and CT play pivotal roles in biology.
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Affiliation(s)
- Aparna Sarkar
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata, India
| | - Dinesh Kumar Pyne
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata, India
| | - Tuyan Biswas
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata, India
| | - Rumpa Das
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata, India
| | - Gandhi K Kar
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata, India
| | - Arnab Halder
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata, India
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12
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Daengngern R, Salaeh R, Saelee T, Kerdpol K, Kungwan N. Excited-state intramolecular proton transfer reactions of 2,5-bis(2′-benzoxazolyl)hydroquinone and its water cluster exhibiting single and double proton transfer: A TD-DFT dynamics simulation. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.110889] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Fang H. Halogen substituent effect on the water-assisted excited-state tautomerization of 2, 7-diazaindole-H 2O complex in aqueous solution: A theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 214:152-160. [PMID: 30776716 DOI: 10.1016/j.saa.2019.02.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 01/18/2019] [Accepted: 02/10/2019] [Indexed: 06/09/2023]
Abstract
We studied the ESPT process in the 2-DAI-H2O complex theoretically for the first time, and compared the kinetics of 2-DAI-H2O with those features of 7-DAI-H2O. The substituted effect on the dynamics of excited-state double proton transfer in 2-DAI-H2O and 7-DAI-H2O clusters in water were also investigated at the TD-M06-2X/6-311+G(d, p) level. In this work, 2,7-DAI-H2O is also expressed as 2-DAI-H2O and 7-DAI-H2O, in which correspond to different ESPT reactions and generate two tautomers (N2H form and N7H form). In both the 2-DAI-H2O and 7-DAI-H2O complexes, ESPT processes happened in a concertedly but asynchronously protolysis pathway. The ESPT process preferred to occur in the 7-DAI-H2O complex due to its lower barrier height. For the 3-X-2-DAI-H2O and 3-X-7-DAI-H2O (X = H, F, Cl, Br) complexes, the replacement of halogen atom did not influence the ESPT mechanism. However, the replacement of halogen atom changed the structural parameters evidently, reduced the barrier height up to 4-5 kcal/mol, and enlarged the asynchronicity of ESPT apparently. ∆(R1+R2) values in the 3X-2-DAI-H2O and 3X-7-DAI-H2O complexes have linear correlation to the ZPE-corrected ESPT barrier height linearly.
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Affiliation(s)
- Hua Fang
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
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14
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Concurrent ground and excited state proton transfer of (E)-2-((napthalen-2-ylimino)-methyl)phenol: Modulation in micellar media. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.11.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Yi J, Fang H. Effect of different alkyl groups on excited-state tautomerization of 7AI-azaindole-H 2O: A theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 202:58-64. [PMID: 29777935 DOI: 10.1016/j.saa.2018.05.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 04/21/2018] [Accepted: 05/09/2018] [Indexed: 06/08/2023]
Abstract
The effect of substituted alkyl groups at different substituted position on the first excited-state proton transfer of nR7AI-H2O (n = 2-6; R = CH3, C2H5, CF3) complexes were theoretically investigated at the TD-M06-2X/6-31 + G(d, p) level. Here n value denoted the substituted position Cn of R group. The replacement of alkyl R group had no effect on the features of HOMO and LUMO, but influenced the S0 → S1 adiabatic transition energies of the nR7AI-H2O complex. Through computation, we found that the double proton transfer took place in a concerted but asynchronous protolysis pattern regardless of substituted group R and substituted position in the nR7AI-H2O complex. The vibrational-mode specific nature of ESPT was verified. The alkyl group R changed the geometrical parameters of TS, and resulted in enlarging/narrowing the asynchronousity of ESPT. The ESPT barrier height was also affected by the substituted group and position.
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Affiliation(s)
- Jiacheng Yi
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Hua Fang
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
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16
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Theoretical study on the substituent effect of halogen atom at different position of 7-azaindole-water derivatives: relative stability and excited-state proton-transfer mechanism. Struct Chem 2018. [DOI: 10.1007/s11224-018-1119-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Tang Z, Qi Y, Wang Y, Zhou P, Tian J, Fei X. Excited-State Proton Transfer Mechanism of 2,6-Diazaindoles·(H2O)n (n = 2–4) Clusters. J Phys Chem B 2018. [DOI: 10.1021/acs.jpcb.7b10207] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhe Tang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
| | | | | | - Panwang Zhou
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
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18
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The effect of protic solvents on the excited state proton transfer of 3-hydroxyflavone: A TD-DFT static and molecular dynamics study. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.148] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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19
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Yi J, Fang H. Theoretical Study on the Substituent Effect on the Excited-State Proton Transfer in the 7-Azaindole-Water Derivatives. Photochem Photobiol 2017; 94:27-35. [DOI: 10.1111/php.12839] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 08/21/2017] [Indexed: 11/27/2022]
Affiliation(s)
- Jiacheng Yi
- Department of Chemistry and Material Science; College of Science; Nanjing Forestry University; Nanjing Jiangsu China
| | - Hua Fang
- Department of Chemistry and Material Science; College of Science; Nanjing Forestry University; Nanjing Jiangsu China
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20
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Yi J, Fang H. Theoretical investigation on the water-assisted excited-state proton transfer of 7-azaindole derivatives: substituent effect. J Mol Model 2017; 23:312. [DOI: 10.1007/s00894-017-3487-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 09/25/2017] [Indexed: 11/28/2022]
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21
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Kanlayakan N, Kerdpol K, Prommin C, Salaeh R, Chansen W, Sattayanon C, Kungwan N. Effects of different proton donor and acceptor groups on excited-state intramolecular proton transfers of amino-type and hydroxy-type hydrogen-bonding molecules: theoretical insights. NEW J CHEM 2017. [DOI: 10.1039/c7nj00984d] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The effect of proton donors (NH and OH) on ESIPT was investigated using DFT and TD-DFT.
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Affiliation(s)
- Narissa Kanlayakan
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
| | - Khanittha Kerdpol
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
| | - Chanatkran Prommin
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
| | - Rusrina Salaeh
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
| | - Warinthon Chansen
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
| | - Chanchai Sattayanon
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
| | - Nawee Kungwan
- Department of Chemistry
- Faculty of Science
- Chiang Mai University
- Chiang Mai 50200
- Thailand
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22
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Methanol-mediated excited-state double proton transfer in 1 H -pyrrolo[3,2- h ]quinoline: Concerted or Sequential Mechanism? COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.09.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Yamamoto K, Takatsuka K. Dynamical mechanism of charge separation by photoexcited generation of proton–electron pairs in organic molecular systems. A nonadiabatic electron wavepacket dynamics study. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.05.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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24
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Xu C, Yu L, Zhu C, Yu J, Cao Z. Intersystem crossing-branched excited-state intramolecular proton transfer for o-nitrophenol: An ab initio on-the-fly nonadiabatic molecular dynamic simulation. Sci Rep 2016; 6:26768. [PMID: 27221650 PMCID: PMC4879701 DOI: 10.1038/srep26768] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/09/2016] [Indexed: 12/26/2022] Open
Abstract
The 6SA-CASSCF(10, 10)/6-31G (d, p) quantum chemistry method has been applied to perform on-the-fly trajectory surface hopping simulation with global switching algorithm and to explore excited-state intramolecular proton transfer reactions for the o-nitrophenol molecule within low-lying electronic singlet states (S0 and S1) and triplet states (T1 and T2). The decisive photoisomerization mechanisms of o-nitrophenol upon S1 excitation are found by three intersystem crossings and one conical intersection between two triplet states, in which T1 state plays an essential role. The present simulation shows branch ratios and timescales of three key processes via T1 state, non-hydrogen transfer with ratio 48% and timescale 300 fs, the tunneling hydrogen transfer with ratios 36% and timescale 10 ps, and the direct hydrogen transfer with ratios 13% and timescale 40 fs. The present simulated timescales might be close to low limit of the recent experiment results.
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Affiliation(s)
- Chao Xu
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Le Yu
- Institute of Molecular Science, Department of Applied Chemistry and Center for Interdisciplinary Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, The College of Chemistry & Materials Science, Shaanxi key Laboratory of Physico-Inorganic Chemistry, Northwest University, Xi’an 710069, P. R. China
| | - Chaoyuan Zhu
- Institute of Molecular Science, Department of Applied Chemistry and Center for Interdisciplinary Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
- State Key Laboratory for Physical Chemistry of Solid Surfaces and Fujian Provincial Key Lab of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Jianguo Yu
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Zexing Cao
- State Key Laboratory for Physical Chemistry of Solid Surfaces and Fujian Provincial Key Lab of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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25
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Lee YM, Park SY, Kim H, Kim TG, Kwon OH. Photoinduced strong acid–weak base reactions in a polar aprotic solvent. Methods Appl Fluoresc 2016; 4:024004. [DOI: 10.1088/2050-6120/4/2/024004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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26
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Liu XY, Chang XP, Xia SH, Cui G, Thiel W. Excited-State Proton-Transfer-Induced Trapping Enhances the Fluorescence Emission of a Locked GFP Chromophore. J Chem Theory Comput 2016; 12:753-64. [PMID: 26744782 PMCID: PMC4750082 DOI: 10.1021/acs.jctc.5b00894] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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The chemical locking of the central
single bond in core chromophores
of green fluorescent proteins (GFPs) influences their excited-state
behavior in a distinct manner. Experimentally, it significantly enhances
the fluorescence quantum yield of GFP chromophores with an ortho-hydroxyl
group, while it has almost no effect on the photophysics of GFP chromophores
with a para-hydroxyl group. To unravel the underlying physical reasons
for this different behavior, we report static electronic structure
calculations and nonadiabatic dynamics simulations on excited-state
intramolecular proton transfer, cis–trans isomerization, and
excited-state deactivation in a locked ortho-substituted GFP model
chromophore (o-LHBI). On the basis of our previous and present results,
we find that the S1 keto species is responsible for the
fluorescence emission of the unlocked o-HBI and the locked o-LHBI
species. Chemical locking does not change the parts of the S1 and S0 potential energy surfaces relevant to enol–keto
tautomerization; hence, in both chromophores, there is an ultrafast
excited-state intramolecular proton transfer that takes only 35 fs
on average. However, the locking effectively hinders the S1 keto species from approaching the keto S1/S0 conical intersections so that most of trajectories are trapped in
the S1 keto region for the entire 2 ps simulation time.
Therefore, the fluorescence quantum yield of o-LHBI is enhanced compared
with that of unlocked o-HBI, in which the S1 excited-state
decay is efficient and ultrafast. In the case of the para-substituted
GFP model chromophores p-HBI and p-LHBI, chemical locking hardly affects
their efficient excited-state deactivation via cis–trans isomerization;
thus, the fluorescence quantum yields in these chromophores remain
very low. The insights gained from the present work may help to guide
the design of new GFP chromophores with improved fluorescence emission
and brightness.
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Affiliation(s)
- Xiang-Yang Liu
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, China and
| | - Xue-Ping Chang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, China and
| | - Shu-Hua Xia
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, China and
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, China and
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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27
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Zhang YJ, Zhao JF, Li YQ. The investigation of excited state proton transfer mechanism in water-bridged 7-azaindole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 153:147-151. [PMID: 26301539 DOI: 10.1016/j.saa.2015.08.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Revised: 07/22/2015] [Accepted: 08/12/2015] [Indexed: 06/04/2023]
Abstract
Based on the time-dependent density functional theory (TDDFT), the excited-state intermolecular proton transfer (ESIPT) mechanism of water-bridged 7-azaindole has been investigated theoretically. The calculations of primary bond lengths and the IR vibrational spectra between the S0 state and the S1 state that verified the intramolecular hydrogen bond were strengthened. The fact that reproduced experimental absorbance and fluorescence emission spectra well theoretically demonstrate that the TDDFT theory we adopted is reasonable and effective. In addition, intramolecular charge transfer based on the frontier molecular orbitals demonstrated the indication of the ESIPT reaction. The constructed potential energy curves of ground state and the first excited state based on keeping the H2···O3 and H6···N7 distances fixed at a series of values have been used to illustrate the ESIPT process. A relative lower barrier of 5.94 kcal/mol in the S1 state potential energy curve for type II (lower than that of 9.82 kcal/mol in the S1 state for type I) demonstrates that type II ESIPT process occurs firstly in 7Al-2H2O complex.
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Affiliation(s)
- Yong-Jia Zhang
- Department of Physics, Liaoning University, Shenyang 110036, PR China
| | - Jin-Feng Zhao
- Department of Physics, Liaoning University, Shenyang 110036, PR China; State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China
| | - Yong-Qing Li
- Department of Physics, Liaoning University, Shenyang 110036, PR China; State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China.
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28
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Omidyan R, Omidyan M, Mohammadzadeh A. Electronically excited state of neutral/protonated, indole/5-hydroxyinodole–water clusters: a theoretical study. RSC Adv 2016. [DOI: 10.1039/c6ra06716f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Simulated IR-spectra of neutral, protonated indole–water clusters calculated at the RI-MP2, RI-CC2/aug-cc-pVDZ level of theory at the ground and S1 excited states.
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Affiliation(s)
- Reza Omidyan
- Department of Chemistry
- University of Isfahan
- Isfahan
- Iran
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29
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Chaiwongwattana S, Sapunar M, Ponzi A, Decleva P, Došlić N. Exploration of Excited State Deactivation Pathways of Adenine Monohydrates. J Phys Chem A 2015; 119:10637-44. [DOI: 10.1021/acs.jpca.5b07496] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | - Marin Sapunar
- Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Aurora Ponzi
- Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Piero Decleva
- Dipartimento di
Scienze Chimiche, Università di Trieste, 34127 Trieste, Italy
| | - Nađa Došlić
- Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
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30
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Esboui M. Stepwise vs concerted excited state tautomerization of 2-hydroxypyridine: Ammonia dimer wire mediated hydrogen/proton transfer. J Chem Phys 2015. [PMID: 26203026 DOI: 10.1063/1.4926812] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The stepwise and concerted excited state intermolecular proton transfer (PT) and hydrogen transfer (HT) reactions in 2-hydroxypyridine-(NH3)2 complex in the gas phase under Cs symmetry constraint and without any symmetry constraints were performed using quantum chemical calculations. It shows that upon excitation, the hydrogen bonded in 2HP-(NH3)2 cluster facilitates the releasing of both hydrogen and proton transfer reactions along ammonia wire leading to the formation of the 2-pyridone tautomer. For the stepwise mechanism, it has been found that the proton and the hydrogen may transfer consecutively. These processes are distinguished from each other through charge translocation analysis and the coupling between the motion of the proton and the electron density distribution along ammonia wire. For the complex under Cs symmetry, the excited state HT occurs on the A″((1)πσ*) and A'((1)nσ*) states over two accessible energy barriers along reaction coordinates, and excited state PT proceeds mainly through the A'((1)ππ*) and A″((1)nπ*) potential energy surfaces. For the unconstrained complex, potential energy profiles show two (1)ππ*-(1)πσ* conical intersections along enol → keto reaction path indicating that proton and H atom are localized, respectively, on the first and second ammonia of the wire. Moreover, the concerted excited state PT is competitive to take place with the stepwise process, because it proceeds over low barriers of 0.14 eV and 0.11 eV with respect to the Franck-Condon excitation of enol tautomer, respectively, under Cs symmetry and without any symmetry constraints. These barriers can be probably overcome through tunneling effect.
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Affiliation(s)
- Mounir Esboui
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications, Département de Physique, Faculté des Sciences de Tunis, 2092 Tunis, Tunisia
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31
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Yamamoto K, Takatsuka K. An Electron Dynamics Mechanism of Charge Separation in the Initial-Stage Dynamics of Photoinduced Water Splitting in XMnWater (X=OH, OCaH) and Electron-Proton Acceptors. Chemphyschem 2015; 16:2534-7. [DOI: 10.1002/cphc.201500416] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Indexed: 11/11/2022]
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32
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Omidyan R, Salehi M, Azimi G. A theoretical exploration of the nonradiative deactivation of hydrogen-bond complexes: isoindole–pyridine and quinoline–pyrrole. RSC Adv 2015. [DOI: 10.1039/c5ra18950k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CC2 potential energy profiles of the ground and excited states of the isoindole–pyridine complex along the proton transfer reaction coordinate are studied.
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Affiliation(s)
- Reza Omidyan
- Department of Chemistry
- University of Isfahan
- 81746-73441 Isfahan
- Iran
| | - Mohammad Salehi
- Department of Chemistry
- University of Isfahan
- 81746-73441 Isfahan
- Iran
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33
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Kerdpol K, Daengngern R, Kungwan N. Excited-state proton-transfer reactions of 7-azaindole with water, ammonia and mixed water–ammonia: microsolvated dynamics simulation. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2014.958485] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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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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35
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Kungwan N, Kerdpol K, Daengngern R, Hannongbua S, Barbatti M. Effects of the second hydration shell on excited-state multiple proton transfer: dynamics simulations of 7-azaindole:(H2O)1–5 clusters in the gas phase. Theor Chem Acc 2014. [DOI: 10.1007/s00214-014-1480-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Kungwan N, Daengngern R, Piansawan T, Hannongbua S, Barbatti M. Theoretical study on excited-state intermolecular proton transfer reactions of 1H-pyrrolo[3,2-h]quinoline with water and methanol. Theor Chem Acc 2013. [DOI: 10.1007/s00214-013-1397-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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37
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Daengngern R, Kerdpol K, Kungwan N, Hannongbua S, Barbatti M. Dynamics simulations of excited-state triple proton transfer in 7-azaindole complexes with water, water–methanol and methanol. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2013.05.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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38
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Fang H, Kim Y. Excited-State Tautomerization of 7-Azaindole in Nonpolar Solution: A Theoretical Study Based on Liquid-Phase Potential Surfaces of Mean Force. J Chem Theory Comput 2013; 9:3557-66. [DOI: 10.1021/ct3010694] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hua Fang
- Department of Applied Chemistry, Kyung Hee University, 1 Seochun-Dong,
Giheung-Gu, Yongin-Si, Gyeonggi-Do, 446-701, Republic of Korea
| | - Yongho Kim
- Department of Applied Chemistry, Kyung Hee University, 1 Seochun-Dong,
Giheung-Gu, Yongin-Si, Gyeonggi-Do, 446-701, Republic of Korea
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39
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Yu XF, Yamazaki S, Taketsugu T. Theoretical Study on Water-Mediated Excited-State Multiple Proton Transfer in 7-Azaindole: Significance of Hydrogen Bond Rearrangement. J Phys Chem A 2012; 116:10566-73. [DOI: 10.1021/jp308535h] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xue-fang Yu
- Department of Chemistry, Faculty
of Science, Hokkaido University, Sapporo
060-0810, Japan
| | - Shohei Yamazaki
- Department of Chemistry, Faculty
of Science, Hokkaido University, Sapporo
060-0810, Japan
| | - Tetsuya Taketsugu
- Department of Chemistry, Faculty
of Science, Hokkaido University, Sapporo
060-0810, Japan
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40
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Cerón-Carrasco JP, Jacquemin D, Cauët E. Cisplatin cytotoxicity: a theoretical study of induced mutations. Phys Chem Chem Phys 2012; 14:12457-64. [DOI: 10.1039/c2cp40515f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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41
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Kungwan N, Plasser F, Aquino AJA, Barbatti M, Wolschann P, Lischka H. The effect of hydrogen bonding on the excited-state proton transfer in 2-(2′-hydroxyphenyl)benzothiazole: a TDDFT molecular dynamics study. Phys Chem Chem Phys 2012; 14:9016-25. [DOI: 10.1039/c2cp23905a] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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