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
收藏
页码：4516 / 4520
页数：5
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