1
|
Yang M, Mu H, Gao J, Zhen Q, Wang X, Guan X, Li H, Li B. Screening the Optimal Probe by Expounding the ESIPT Mechanism and Photophysical Properties in Bis-HBX with Multimodal Substitutions. Molecules 2024; 29:2692. [PMID: 38893566 PMCID: PMC11173473 DOI: 10.3390/molecules29112692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 05/31/2024] [Accepted: 06/04/2024] [Indexed: 06/21/2024] Open
Abstract
DFT and TD-DFT were used in this article to investigate the effects of different substitutions at multiple sites on the photophysical mechanism of bis-HBX in the gas phase. Four different substitution modes were selected, denoted as A1 (X=Me, Y=S), A2 (X=OMe, Y=S), B1 (X=Me, Y=NH), and C1 (X=Me, Y=O). The geometric parameters proved that the IHBs enhanced after photoexcitation, which was conducive to promote the ESIPT process. Combining the analysis of the PECs, it was revealed that the bis-HBX molecule underwent the ESIPT process, and the ease of the ESIPT process was in the order of A1 > A2> B1 > C1. In particular, the TICT process in A1 and B1 promoted the occurrence of the ESIPT process. In addition, the IC process was identified, particularly in C1. Meanwhile, the calculation of fluorescence lifetime and fluorescence rate further confirmed that A1 was the most effective fluorescent probe molecule. This theoretical research provides an innovative theoretical reference for regulating ESIPT reactions and optimizing fluorescent probe molecules.
Collapse
Affiliation(s)
- Min Yang
- Jilin Key Laboratory of Solid-State Laser Technology and Application, School of Physics, Changchun University of Science and Technology, Changchun 130022, China; (M.Y.); (H.M.); (J.G.); (X.W.); (X.G.)
| | - Hongyan Mu
- Jilin Key Laboratory of Solid-State Laser Technology and Application, School of Physics, Changchun University of Science and Technology, Changchun 130022, China; (M.Y.); (H.M.); (J.G.); (X.W.); (X.G.)
| | - Jiaan Gao
- Jilin Key Laboratory of Solid-State Laser Technology and Application, School of Physics, Changchun University of Science and Technology, Changchun 130022, China; (M.Y.); (H.M.); (J.G.); (X.W.); (X.G.)
| | - Qi Zhen
- School of Civil Engineering, Changchun Institute of Technology, Changchun 130012, China;
| | - Xiaonan Wang
- Jilin Key Laboratory of Solid-State Laser Technology and Application, School of Physics, Changchun University of Science and Technology, Changchun 130022, China; (M.Y.); (H.M.); (J.G.); (X.W.); (X.G.)
| | - Xiaotong Guan
- Jilin Key Laboratory of Solid-State Laser Technology and Application, School of Physics, Changchun University of Science and Technology, Changchun 130022, China; (M.Y.); (H.M.); (J.G.); (X.W.); (X.G.)
| | - Hui Li
- Jilin Key Laboratory of Solid-State Laser Technology and Application, School of Physics, Changchun University of Science and Technology, Changchun 130022, China; (M.Y.); (H.M.); (J.G.); (X.W.); (X.G.)
| | - Bo Li
- State Key Laboratory of High Power Semiconductor Lasers, School of Physics, Changchun University of Science and Technology, Changchun 130022, China
| |
Collapse
|
2
|
Makhov DV, Armstrong G, Chuang HH, Ambalampitiya H, Lemishko K, Mohr S, Nelson A, Tennyson J, Shalashilin D. Dissociation of Hydrofluorocarbon Molecules after Electron Impact in Plasma. J Phys Chem Lett 2024; 15:3404-3411. [PMID: 38502942 PMCID: PMC10983062 DOI: 10.1021/acs.jpclett.4c00348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/08/2024] [Accepted: 03/12/2024] [Indexed: 03/21/2024]
Abstract
The process of dissociation for two hydrofluorocarbon molecules in low triplet states excited by electron impact in plasma is investigated by ab initio molecular dynamics (AIMD). The interest in the dissociation of hydrofluorocarbons in plasma is motivated by their role in plasma etching in microelectronic technologies. Dissociation of triplet states is very fast, and the reaction products can be predicted. In this work, it was found that higher triplet states relax into the lowest triplet state within a few femtoseconds due to nonadiabatic dynamics, such that the simplest ab initio MD on the lowest triplet state seems to give a reasonable estimate of the reaction channels branching ratios. We provide evidence of the existence of simple rules for the dissociation of hydrofluorocarbon molecules in triplet states. For molecules with a double bond, the bonds adjacent to the double bond dissociate faster than the other bonds.
Collapse
Affiliation(s)
- Dmitry V. Makhov
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
- School
of Mathematics, University of Bristol, Fry Building, Woodland Road, Bristol BS8 1UG, United Kingdom
| | - Gregory Armstrong
- Quantemol
Ltd., 320 City Road,
The Angel, London EC1V
2NZ, United Kingdom
| | - Hsiao-Han Chuang
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
- School
of Mathematics, University of Bristol, Fry Building, Woodland Road, Bristol BS8 1UG, United Kingdom
| | | | - Kateryna Lemishko
- Quantemol
Ltd., 320 City Road,
The Angel, London EC1V
2NZ, United Kingdom
| | - Sebastian Mohr
- Quantemol
Ltd., 320 City Road,
The Angel, London EC1V
2NZ, United Kingdom
| | - Anna Nelson
- Quantemol
Ltd., 320 City Road,
The Angel, London EC1V
2NZ, United Kingdom
| | - Jonathan Tennyson
- Quantemol
Ltd., 320 City Road,
The Angel, London EC1V
2NZ, United Kingdom
- Department
of Physics and Astronomy, University College
London, London WC1E 6BT, United
Kingdom
| | | |
Collapse
|
3
|
Tang D, Jia L, Shen L, Fang WH. Fewest-Switches Surface Hopping with Long Short-Term Memory Networks. J Phys Chem Lett 2022; 13:10377-10387. [PMID: 36317657 DOI: 10.1021/acs.jpclett.2c02299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The mixed quantum-classical dynamical simulation is essential for studying nonadiabatic phenomena in photophysics and photochemistry. In recent years, many machine learning models have been developed to accelerate the time evolution of the nuclear subsystem. Herein, we implement long short-term memory (LSTM) networks as a propagator to accelerate the time evolution of the electronic subsystem during the fewest-switches surface hopping (FSSH) simulations. A small number of reference trajectories are generated using the original FSSH method, and then the LSTM networks can be built, accompanied by careful examination of typical LSTM-FSSH trajectories that employ the same initial condition and random numbers as the corresponding reference. The constructed network is applied to FSSH to further produce a trajectory ensemble to reveal the mechanism of nonadiabatic processes. Taking Tully's three models as test systems, we qualitatively reproduced the collective results. This work demonstrates that LSTM can be applied to the most popular surface hopping simulations.
Collapse
Affiliation(s)
- Diandong Tang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Luyang Jia
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Lin Shen
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
- Yantai-Jingshi Institute of Material Genome Engineering, Yantai 265505, Shandong, China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
- Yantai-Jingshi Institute of Material Genome Engineering, Yantai 265505, Shandong, China
| |
Collapse
|
4
|
Tsutsumi T, Ono Y, Taketsugu T. Reaction Space Projector (ReSPer) for Visualizing Dynamic Reaction Routes Based on Reduced-Dimension Space. Top Curr Chem (Cham) 2022; 380:19. [PMID: 35266073 DOI: 10.1007/s41061-022-00377-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 02/21/2022] [Indexed: 11/26/2022]
Abstract
To analyze chemical reaction dynamics based on a reaction path network, we have developed the "Reaction Space Projector" (ReSPer) method with the aid of the dimensionality reduction method. This program has two functions: the construction of a reduced-dimensionality reaction space from a molecular structure dataset, and the projection of dynamic trajectories into the low-dimensional reaction space. In this paper, we apply ReSPer to isomerization and bifurcation reactions of the Au5 cluster and succeed in analyzing dynamic reaction routes involved in multiple elementary reaction processes, constructing complicated networks (called "closed islands") of nuclear permutation-inversion (NPI) isomerization reactions, and elucidating dynamic behaviors in bifurcation reactions with reference to bundles of trajectories. Interestingly, in the second application, we find a correspondence between the contribution ratios in the ability to visualize and the symmetry of the morphology of closed islands. In addition, the third application suggests the existence of boundaries that determine the selectivity in bifurcation reactions, which was discussed in the phase space. The ReSPer program is a versatile and robust tool to clarify dynamic reaction mechanisms based on the reduced-dimensionality reaction space without prior knowledge of target reactions.
Collapse
Affiliation(s)
- Takuro Tsutsumi
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Yuriko Ono
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, 001-0021, Japan
| | - Tetsuya Taketsugu
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, 001-0021, Japan.
| |
Collapse
|