Author, as appears in the article.: 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;

Department: Química Física i Inorgànica

URV's Author/s: Poblet Rius, Josep Maria / Rodríguez Fortea, Antonio

Keywords: Triplet quenching Triplet lifetime Photosensitizers Photochemistry Phosphorescence Luminescence Light Hexa-adduct Glycoconjugates Fullerenes Cycloaddition Complexes Carbon C-60 Azide

Abstract: 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.

Thematic Areas: 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

licence for use: https://creativecommons.org/licenses/by/3.0/es/

Author's mail: antonio.rodriguezf@urv.cat josepmaria.poblet@urv.cat

Author identifier: 0000-0001-5884-5629 0000-0002-4533-0623

Last page: 12

Record's date: 2023-02-19

Journal volume: 60

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202104223

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Angewandte Chemie (International Ed. Print). 60 (29): 16109-16118

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

Article's DOI: 10.1002/ange.202104223

Entity: Universitat Rovira i Virgili

Journal publication year: 2021

First page: 2

Publication Type: Journal Publications