Photophysics and light-activated biocidal activity of visible-light-absorbing conjugated oligomers.
ACS Appl Mater Interfaces
; 5(11): 4516-20, 2013 Jun 12.
Article
en En
| MEDLINE
| ID: mdl-23446549
The photophysical properties of three cationic π-conjugated oligomers were correlated with their visible light activated biocidal activity vs S. aureus. The oligomers contain three arylene units (terthiophene, 4a; thiophene-benzotriazole-thiophene, 4b; thiophene-benzothiadiazole-thiophene, 4c) capped on each end by cationic -(CH2)3NMe3(+) groups. The oligomers absorb in the visible region due to their donor-acceptor-donor electronic structure. Oligomers 4a and 4b have high intersystem crossing and singlet oxygen sensitization efficiency, but 4c has a very low intersystem crossing efficiency and it does not sensitize singlet oxygen. The biocidal activity of the oligomers under visible light varies in the order 4a > 4b ≈ 4c.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Polímeros
/
Tiofenos
/
Infecciones Bacterianas
/
Oxígeno Singlete
/
Desinfectantes
/
Luz
Límite:
Humans
Idioma:
En
Revista:
ACS Appl Mater Interfaces
Asunto de la revista:
BIOTECNOLOGIA
/
ENGENHARIA BIOMEDICA
Año:
2013
Tipo del documento:
Article
Pais de publicación:
Estados Unidos