High‐resolution MALDI‐TOF MS study on analysis of low‐molecular‐weight products from photo‐oxidation of poly(3‐hexylthiophene) |
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| Authors: | Junji Mizukado Hiroaki Sato Liang Chen Yasumasa Suzuki Shogo Yamane Yoshinori Aoyama Yuji Yoshida Hiroyuki Suda |
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| Affiliation: | 1. National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Innovation in Sustainable Chemistry, Tsukuba, Ibaraki, Japan;2. National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Environmental Management Technology, Tsukuba, Ibaraki, Japan;3. National Institute of Advanced Industrial Science and Technology (AIST), Research Center for Photovoltaic Technologies, Tsukuba, Ibaraki, Japan;4. Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Yokohama, Japan |
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| Abstract: | High‐resolution matrix‐assisted laser desorption/ionization (MALDI) time‐of‐flight mass spectrometry (TOF MS) was used for the analysis of the low‐molecular‐weight products from the photo‐oxidation of poly(3‐hexylthiophene) (P3HT) in solution and thin film. Eight new peak series were observed in the low‐mass range of the mass spectra of the products degraded in solution, and the formulas of the eight components were determined from the accurate mass. From SEC/MALDI‐TOF MS, two components were identified as the degraded products, and the other six components were derived from the fragmentation of the degraded products during the MALDI process. A mechanism for the formation of these components was proposed on the basis of the results of MALDI‐TOF MS. For the thin film degradation, a part of products in the solution degradation were observed, which supports that the oxidation of P3HT in solution and thin film proceeded in the same mechanism. This study shows that high‐resolution MALDI‐TOF MS is effective for the analysis of the low‐molecular‐weight products from P3HT photo‐oxidation and expected to be feasible for the degradation analyses of other polymers. Copyright © 2015 John Wiley & Sons, Ltd. |
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| Keywords: | matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS) high‐resolution MS photo‐oxidation chain scission poly(3‐hexylthiophene) (P3HT) |
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