Aromatic Amides: A Smart Backbone toward Isolated Ultralong Bright Blue-Phosphorescence in Confined Polymeric Films.
Angew Chem Int Ed Engl
; 62(22): e202300927, 2023 May 22.
Article
em En
| MEDLINE
| ID: mdl-36862068
ABSTRACT
We describe an aromatic amide skeleton for manipulation of triplet excited states toward bright long-lived blue phosphorescence. Spectroscopic studies and theoretical calculations demonstrated that the aromatic amides can promote strong spin-orbit coupling between (π,π*) and the bridged (n,π*) states, and enable multiple channels to populate the emissive 3 (π,π*), as well as facilitate robust hydrogen bonding with polyvinyl alcohol to suppress non-radiative relaxations. Isolated inherent deep-blue (0.155, 0.056) to sky-blue (0.175, 0.232) phosphorescence with high quantum yields (up to 34.7 %) in confined films are achieved. The blue afterglow of the films can last for several seconds and are showcased in information display, anti-counterfeiting, and white light afterglow. Owing to the high population of 3 (π,π*) states, the smart aromatic amide skeleton provides an important molecular design prototype to manipulate triplet excited states for ultralong phosphorescence with various colors.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2023
Tipo de documento:
Article