Autor según el artículo: Ramos-Soriano, Javier; Perez-Sanchez, Alfonso; Ramirez-Barroso, Sergio; Illescas, Beatriz M; Azmani, Khalid; Rodriguez-Fortea, Antonio; Poblet, Josep M; Hally, Cormac; Nonell, Santi; Garcia-Fresnadillo, David; Rojo, Javier; Martin, Nazario
Departamento: Química Física i Inorgànica
Autor/es de la URV: Azmani, Khalid / Poblet Rius, Josep Maria / Rodríguez Fortea, Antonio
Palabras clave: Triplet quenching Triplet lifetime Photosensitizers Photochemistry Phosphorescence Luminescence Light Hexa-adduct Glycoconjugates Fullerenes Cycloaddition Complexes Carbon C-60 Azide
Resumen: Suitably engineered molecular systems exhibiting triplet excited states with very long lifetimes are important for high-end applications in nonlinear optics, photocatalysis, or biomedicine. We report the finding of an ultra-long-lived triplet state with a mean lifetime of 93 ms in an aqueous phase at room temperature, measured for a globular tridecafullerene with a highly compact glycodendrimeric structure. A series of three tridecafullerenes bearing different glycodendrons and spacers to the C-60 units have been synthesized and characterized. UV/Vis spectra and DLS experiments confirm their aggregation in water. Steady-state and time-resolved fluorescence experiments suggest a different degree of inner solvation of the multifullerenes depending on their molecular design. Efficient quenching of the triplet states by O-2 but not by waterborne azide anions has been observed. Molecular modelling reveals dissimilar access of the aqueous phase to the internal structure of the tridecafullerenes, differently shielded by the glycodendrimeric shell.
Áreas temáticas: Química Medicina ii Medicina i Materiais Interdisciplinar General medicine General chemistry Farmacia Engenharias ii Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemistry Catalysis Astronomia / física
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: josepmaria.poblet@urv.cat antonio.rodriguezf@urv.cat
Identificador del autor: 0000-0002-4533-0623 0000-0001-5884-5629
Página final: 12
Fecha de alta del registro: 2024-10-12
Volumen de revista: 60
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://onlinelibrary.wiley.com/doi/10.1002/anie.202104223
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Angewandte Chemie (International Ed. Print). 60 (29): 16109-16118
Referencia de l'ítem segons les normes APA: Ramos-Soriano, Javier; Perez-Sanchez, Alfonso; Ramirez-Barroso, Sergio; Illescas, Beatriz M; Azmani, Khalid; Rodriguez-Fortea, Antonio; Poblet, Josep (2021). An Ultra-Long-Lived Triplet Excited State in Water at Room Temperature: Insights on the Molecular Design of Tridecafullerenes. Angewandte Chemie (International Ed. Print), 60(29), 16109-16118. DOI: 10.1002/anie.202104223
DOI del artículo: 10.1002/anie.202104223
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2021
Página inicial: 2
Tipo de publicación: Journal Publications