| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 봄 (04/07 ~ 04/09, 대전컨벤션센터) |
| 권호 |
46권 1호 |
| 발표분야 |
분자전자 부문위원회 Ⅰ |
| 제목 |
The kinetic and mechanistic investigation of interfacial electron transfer process in semi-heterogeneous photocatalytic system (porphyrin dye + TiO2/Re(I)) |
| 초록 |
We report a collisional electron-injection process in the semi-hetero hybrid photocatalytic system consisting of non-anchored porphyrins and TiO2/Re(I) nanoparticles. The net hetero-collisional electron transfer from the non-anchored fluorescent porphyrin sensitizer to the TiO2 catalytic particles was a major event during the initial stage of the catalysis. According to in situ UV‒vis absorption spectroscopy and mass analysis of dye solution filtered after photolysis, the initially added porphyrin dye is found to experience a photomodification accompanied by a breakage of π‒conjugation. With the structural identification of deformed porphyrin species, two acetyl- or ethyl-group modified porphyrins were prepared, and this modification elevated the excited-state energy levels, consequently shortening the activity delay at the early stage of photolysis. Thus, chemical modification had a favorable effect on the photosensitizing and electron transportation abilities of the dye. |
| 저자 |
서윤정, 이대한, 이상훈, 최성한, 김소연, 신재윤, 김철훈, 박종진, 강상욱, 손호진
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| 소속 |
고려대 |
| 키워드 |
Porphyrin Dye; Heterogeneous System; Photocatalyst
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| E-Mail |
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