Photophysics and Light-Activated Biocidal Activity of Visible-Light-Absorbing Conjugated Oligomers

被引：40

作者：

Parthasarathy, Anand ^{[1
]}

Goswami, Subhadip ^{[1
]}

Corbitt, Thomas S. ^{[2
,3
]}

Ji, Eunkyung ^{[2
,3
]}

Dascier, Dimitri ^{[2
,3
]}

Whitten, David G. ^{[2
,3
]}

Schanze, Kirk S. ^{[1
]}

机构：

[1] Univ Florida, Dept Chem, Gainesville, FL 32611 USA

[2] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA

[3] Univ New Mexico, Ctr Biomed Engn, Albuquerque, NM 87131 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 11期

关键词：

conjugated oligomer; singlet oxygen; light activated biocide; donor-acceptor; ANTIBACTERIAL ACTIVITY; BAND-GAP; POLYMERS; ELECTRON; SURFACES; ATOM;

D O I：

10.1021/am400282p

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The photophysical properties of three cationic pi-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)(3)NMe3+ group. 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 approximate to 4c.

引用

页码：4516 / 4520

页数：5

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