A General Strategy to Enhance Donor-Acceptor Molecules Using Solvent-Excluding Substituents.
Angew Chem Int Ed Engl
; 59(12): 4785-4792, 2020 03 16.
Article
em En
| MEDLINE
| ID: mdl-31922642
ABSTRACT
While organic donor-acceptor (D-A) molecules are widely employed in multiple areas, the application of more D-A molecules could be limited because of an inherent polarity sensitivity that inhibits photochemical processes. Presented here is a facile chemical modification to attenuate solvent-dependent mechanisms of excited-state quenching through addition of a ß-carbonyl-based polar substituent. The results reveal a mechanism wherein the ß-carbonyl substituent creates a structural buffer between the donor and the surrounding solvent. Through computational and experimental analyses, it is demonstrated that the ß-carbonyl simultaneously attenuates two distinct solvent-dependent quenching mechanisms. Using the ß-carbonyl substituent, improvements in the photophysical properties of commonly used D-A fluorophores and their enhanced performance in biological imaging are shown.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostos Orgânicos
/
Teoria Quântica
/
Corantes Fluorescentes
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Estados Unidos