Publicado

2025-01-29

Simulation of electronic structure and excited states of a chlorophyll-A system

Simulación de estructura electrónica y estados excitados del sistema molecular clorofila-A

Simulação da estrutura eletrônica e estados excitados do sistema molecular da clorofila-A

DOI:

https://doi.org/10.15446/rev.colomb.quim.v53n1.116612

Palabras clave:

Chlorophyll-A, density functional theory, Optical spectroscopy, electronic structure, atomic nuclei (en)
Clorofila-A, teoría funcional de densidad, Espectroscopia óptica, Estructura electrónica, Núcleos atómicos (es)
Clorofila-A, teoria do funcional da densidade, Espectroscopia óptica, Estrutura eletrônica, Núcleos atômicos (pt)

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A system of six chlorophyll-A molecules (Ch-A-6) was studied by quantum chemical modeling methods using density functional theory and its non-local approximations. Theoretical modeling of the spatial structure, electronic levels, distribution of effective charges on atoms and excited states was carried out simultaneously with interpretation of experimental optical absorption spectra of chlorophyll-A in solution with diethyl ether. Analysis of electronic structure and atomic nuclei by Mulliken methods allowed to establish the nature of the bond between chlorophyll-A molecules within the system. The effect of Mg coordinate position in the formation of bands in calculated absorption spectra was studied. According to the calculations, excited states are caused by transitions from within each chlorophyll fragment. Transitions of mixed molecular orbitals can also be detected. A final analysis of non-covalent interactions showed the presence of a high degree of hydrogen bonds and strong Van der Waals interactions.

Un sistema compuesto por seis moléculas de clorofila-A (Ch-A-6) fue estudiado a partir de métodos de simulación de química cuántica mediante la teoría funcional de la densidad y su aproximación de forma no local. La simulación teórica de la estructura espacial, la configuración electrónica y la distribución de cargas efectivas en átomos y en estados excitados se llevaron a cabo simultáneamente con la interpretación de espectros ópticos de clorofila-A en solución con etoxietano. El análisis de la estructura electrónica y de los núcleos atómicos mediante métodos Mulliken permitió establecer la naturaleza del enlace entre las moléculas de clorofila-A dentro del sistema. Se estudió el efecto de la posición del magnesio (Mg) en espectros de absorción simulados. Según los cálculos, los estados excitados son causados por transiciones dentro de cada fragmento de clorofila. También se detectaron otras transiciones entre orbitales moleculares. El análisis de interacciones no covalentes mostró la presencia de un alto grado de enlaces de hidrógeno y fuertes interacciones de Van der Waals.

Um sistema composto por seis moléculas de clorofila-A (Ch-A-6) foi caracterizado em simulação física quântica usando a teoria do funcional da densidade e sua aproximação não local. A simulação da estrutura espacial, da configuração eletrônica e da distribuição de cargas efetivas nos átomos e nos estados excitados foi realizada simultaneamente, com interpretação dos espectros ópticos da clorofila-A em solução em etoxietano. A análise da estrutura eletrônica e dos núcleos atômicos usando métodos Mulliken permitiu estabelecer a natureza da ligação entre as moléculas de clorofila-A dentro do sistema. O efeito da posição do magnésio (Mg) nos espectros de absorção simulados foi estudado. De acordo com os cálculos, os estados excitados são causados ​​por transições dentro dos fragmentos, outras transições entre orbitais moleculares também foram detectadas. A análise das interações não covalentes mostrou a presença de um alto grau de ligações de hidrogênio e fortes interações de Van der Waals.

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Cómo citar

IEEE

[1]
D. A. Rivas Velasquez y A. Shurygin Vladimirovich, «Simulation of electronic structure and excited states of a chlorophyll-A system», Rev. Colomb. Quim., vol. 53, n.º 1, pp. 29–36, ene. 2025.

ACM

[1]
Rivas Velasquez, D.A. y Shurygin Vladimirovich, A. 2025. Simulation of electronic structure and excited states of a chlorophyll-A system. Revista Colombiana de Química. 53, 1 (ene. 2025), 29–36. DOI:https://doi.org/10.15446/rev.colomb.quim.v53n1.116612.

ACS

(1)
Rivas Velasquez, D. A.; Shurygin Vladimirovich, A. Simulation of electronic structure and excited states of a chlorophyll-A system. Rev. Colomb. Quim. 2025, 53, 29-36.

APA

Rivas Velasquez, D. A. y Shurygin Vladimirovich, A. (2025). Simulation of electronic structure and excited states of a chlorophyll-A system. Revista Colombiana de Química, 53(1), 29–36. https://doi.org/10.15446/rev.colomb.quim.v53n1.116612

ABNT

RIVAS VELASQUEZ, D. A.; SHURYGIN VLADIMIROVICH, A. Simulation of electronic structure and excited states of a chlorophyll-A system. Revista Colombiana de Química, [S. l.], v. 53, n. 1, p. 29–36, 2025. DOI: 10.15446/rev.colomb.quim.v53n1.116612. Disponível em: https://revistas.unal.edu.co/index.php/rcolquim/article/view/116612. Acesso em: 18 feb. 2025.

Chicago

Rivas Velasquez, Daniel Alejandro, y Anton Shurygin Vladimirovich. 2025. «Simulation of electronic structure and excited states of a chlorophyll-A system». Revista Colombiana De Química 53 (1):29-36. https://doi.org/10.15446/rev.colomb.quim.v53n1.116612.

Harvard

Rivas Velasquez, D. A. y Shurygin Vladimirovich, A. (2025) «Simulation of electronic structure and excited states of a chlorophyll-A system», Revista Colombiana de Química, 53(1), pp. 29–36. doi: 10.15446/rev.colomb.quim.v53n1.116612.

MLA

Rivas Velasquez, D. A., y A. Shurygin Vladimirovich. «Simulation of electronic structure and excited states of a chlorophyll-A system». Revista Colombiana de Química, vol. 53, n.º 1, enero de 2025, pp. 29-36, doi:10.15446/rev.colomb.quim.v53n1.116612.

Turabian

Rivas Velasquez, Daniel Alejandro, y Anton Shurygin Vladimirovich. «Simulation of electronic structure and excited states of a chlorophyll-A system». Revista Colombiana de Química 53, no. 1 (enero 29, 2025): 29–36. Accedido febrero 18, 2025. https://revistas.unal.edu.co/index.php/rcolquim/article/view/116612.

Vancouver

1.
Rivas Velasquez DA, Shurygin Vladimirovich A. Simulation of electronic structure and excited states of a chlorophyll-A system. Rev. Colomb. Quim. [Internet]. 29 de enero de 2025 [citado 18 de febrero de 2025];53(1):29-36. Disponible en: https://revistas.unal.edu.co/index.php/rcolquim/article/view/116612

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