An ESR study on superoxide radical anion generation and its involvement in the photooxidative degradation of poly-3-hexylthiophene in chlorobenzene solution

被引：18

作者：

Chen, Liang ^{[1
]}

Mizukado, Junji ^{[1
]}

Suzuki, Yasumasa ^{[1
]}

Kutsuna, Shuzo ^{[1
]}

Aoyama, Yoshinori ^{[1
]}

Yoshida, Yuji ^{[1
]}

Suda, Hiroyuki ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2014年 / 605卷

关键词：

VISIBLE-LIGHT IRRADIATION; POLYMER SOLAR-CELLS; SINGLET OXYGEN; EPR; PHOTODEGRADATION; P3HT; POLY(3-ALKYLTHIOPHENES); POLY(3-HEXYLTHIOPHENE); MECHANISM; IONS;

D O I：

10.1016/j.cplett.2014.05.030

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The photooxidative degradation of poly-3-hexylthiophene (P3HT) in chlorobenzene solution containing dissolved oxygen was performed at room temperature. The generation of superoxide radical anion (O-2(center dot-)) during the photooxidation of P3HT was verified by ESR measurements using 5,5-dimethyl-1-pyrro-line-N-oxide (DMPO) as the spin trap. The changes in mass spectra determined by MALDI-TOF MS showed that P3HT photodegradation was prevented in the presence of DMPO. Kinetics analysis shows that the prevention of P3HT photodegradation is due to the scavenging of O-2(center dot-) by DMPO. Therefore, the involvement of O-2(center dot-) in the initial step of P3HT photodegradation could be concluded. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：98 / 102

页数：5

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