| 학회 |
한국공업화학회 |
| 학술대회 |
2020년 가을 (10/28 ~ 10/30, 광주 김대중컨벤션센터(Kimdaejung Convention Center)) |
| 권호 |
24권 1호 |
| 발표분야 |
포스터-에너지저장·변환 |
| 제목 |
Ancillary Ligand Effects on Heteroleptic Ir(III) Dye in Dye-Sensitized Photocatalytic CO2 Reduction: Aryl-Substitution on Bipyridine Ligand and its Control on Catalytic Performance |
| 초록 |
We report the synthesis and photochemical and -physical properties as well as the catalytic performance of a series of heteroleptic Ir(III) photosensitizers (IrPS), [Ir(C^N)2(N^NAryl)]+, possessing ancillary ligands which are varied with aryl-substituents on bipyridyl unit [C^N = (2-pyridyl)benzo[b]thiophen-3-yl (btp); N^NAryl = 4,4′-Y2-bpy (Y = -Ph or -PhSi(Ph)3]. Ancillary ligand effect was dominant in the light driven energy transfer process. Their photosensitizing abilities were tested in a homogeneous condition for CO2 reduction (IrPS + Re(I) catalyst) as well as a semi-heterogeneous photocatalytic system consisting of Ir(III) photosensitizer and Re(I) catalyst supported on TiO2 semiconductor (IrPS + TiO2/Re(I). We found that the π-extension of bipyridyl ligand by aryl-substitution puts bipyridyl ligand in use as an electron relay unit performing charge accumulation before delivering to the catalytic center, greatly improving the overall CO2-to-CO conversion activities. |
| 저자 |
최민수1, 최성한1, 이대한1, 백창현1, 김철훈2, 조대원2, 박종진1, 강상욱2, 손호진1
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| 소속 |
1고려대, 2교수 |
| 키워드 |
photosensitizer; Ir complex; CO2 reduction
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| E-Mail |
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