A detailed insight behind the structure of absorption bands of the photochromic couple dimethyldihydropyrene (DHP)/metacyclophanediene (CPD) is studied employing vibronic coupling theory. Two separate model molecular Hamiltonians, including a maximum of four electronic states and 18 vibrational modes for DHP and five electronic states and 20 vibrational modes for CPD, are constructed in a diabatic electronic representation. The parameters of the Hamiltonians are estimated from the electronic energies obtained from extensive density functional theory (DFT) and time-dependent DFT calculations. Based on these Hamiltonians’ parameters, a detailed analysis of potential energy curves is performed in conjunction with positional and energetic locations of several stationary points in multi-dimensional potential energy surfaces. Based on the results of electronic structure calculations, quantum nuclear dynamics studies on the electronic excited states of DHP and CPD are performed to understand the impact of non-adiabatic effects on the formation of vibronic structures of absorption bands of these photo-isomers.
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14 December 2022
Research Article|
December 09 2022
Absorption band structure of the photochromic dimethyldihydropyrene/metacyclophanediene couple. Insight from vibronic coupling theory Available to Purchase
Rudraditya Sarkar
;
Rudraditya Sarkar
a)
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Laboratoire de Chimie et Physique Quantiques (UMR 5626), CNRS et Université de Toulouse 3
, 31062 Toulouse, France
2
Institut de Química Computacional i Catàlisi and Department de Química, Universitat de Girona
, 17003 Girona, Catalonia, Spain
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Marie-Catherine Heitz
;
Marie-Catherine Heitz
(Data curation, Formal analysis, Methodology, Resources, Validation, Visualization, Writing – review & editing)
1
Laboratoire de Chimie et Physique Quantiques (UMR 5626), CNRS et Université de Toulouse 3
, 31062 Toulouse, France
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Martial Boggio-Pasqua
Martial Boggio-Pasqua
a)
(Data curation, Formal analysis, Funding acquisition, Investigation, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – review & editing)
1
Laboratoire de Chimie et Physique Quantiques (UMR 5626), CNRS et Université de Toulouse 3
, 31062 Toulouse, France
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Rudraditya Sarkar
1,2,a)
Marie-Catherine Heitz
1
Martial Boggio-Pasqua
1,a)
1
Laboratoire de Chimie et Physique Quantiques (UMR 5626), CNRS et Université de Toulouse 3
, 31062 Toulouse, France
2
Institut de Química Computacional i Catàlisi and Department de Química, Universitat de Girona
, 17003 Girona, Catalonia, Spain
J. Chem. Phys. 157, 224303 (2022)
Article history
Received:
September 09 2022
Accepted:
November 18 2022
Citation
Rudraditya Sarkar, Marie-Catherine Heitz, Martial Boggio-Pasqua; Absorption band structure of the photochromic dimethyldihydropyrene/metacyclophanediene couple. Insight from vibronic coupling theory. J. Chem. Phys. 14 December 2022; 157 (22): 224303. https://doi.org/10.1063/5.0125114
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