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Investigación de la fotodinámica de los sistemas nucleobase-agua

Haseena Sheik¹, Luca Grisanti², Tea Ostojić¹

¹Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia. antonio.prlj@irb.hr.

Physical chemistry chemical physics : PCCP

|August 20, 2025

Resumen

Este estudio introduce un método computacional para analizar la dinámica molecular, centrándose en cómo el agua influye en la fotoquímica de los grupos de agua de 2,6-diaminopurina.

Área de la Ciencia:

Química computacional
La fotoquímica
Dinámica molecular

Sus antecedentes:

Los sistemas de enlace débil con hidrógeno son cruciales en los procesos químicos y biológicos.
La comprensión de la dinámica no adiabática requiere métodos computacionales precisos.
El papel del disolvente en la fotofísica molecular es complejo.

Objetivo del estudio:

Desarrollar un protocolo computacional para simular dinámicas no adiabáticas en sistemas flexibles con enlaces de hidrógeno.
Para investigar la fotodinámica de las agrupaciones de 2,6-diaminopurina nucleobase-agua.
Para aclarar la influencia del agua en la fotofísica y la fotoquímica de estos grupos.

Principales métodos:

Desarrollo de un protocolo computacional pragmático.
Incorporación de la flexibilidad molecular y las distribuciones cuánticas de las condiciones iniciales.
Aplicación a los grupos de agua y base de 2,6-diaminopurina.

Principales resultados:

Se estableció un nuevo enfoque computacional para la dinámica no adiabática.
El estudio reveló el papel significativo del agua en la fotodinámica.
Se obtuvieron conocimientos específicos sobre la fotofísica y la fotoquímica de los grupos estudiados.

Conclusiones:

El protocolo desarrollado proporciona una herramienta práctica para el estudio de sistemas moleculares complejos.
El agua juega un papel activo en las vías fotofísicas y fotoquímicas.
Esta investigación avanza en la comprensión de las interacciones nucleobase-agua bajo fotoexcitación.

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