Organosilica nanotubes were synthesized via the co‐condensation of 1,4‐bis(triethoxysilyl)benzene and 5,5’‐bis(triisopropoxysilyl)‐2,2’‐bipyridine in the presence of a surfactant micelle template under acidic conditions. These materials ...
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https://www.riss.kr/link?id=O106562882
2021년
-
1434-1948
1099-0682
SCI;SCIE;SCOPUS
학술저널
1624-1631 [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
Organosilica nanotubes were synthesized via the co‐condensation of 1,4‐bis(triethoxysilyl)benzene and 5,5’‐bis(triisopropoxysilyl)‐2,2’‐bipyridine in the presence of a surfactant micelle template under acidic conditions. These materials ...
Organosilica nanotubes were synthesized via the co‐condensation of 1,4‐bis(triethoxysilyl)benzene and 5,5’‐bis(triisopropoxysilyl)‐2,2’‐bipyridine in the presence of a surfactant micelle template under acidic conditions. These materials are termed BPy(X)‐NTs, where X represents the BPy loading in the framework. The surface BPy moieties in these materials acted as chelating ligands to immobilize metal complexes in the nanotube pores, such that rhenium complexes [Re(bpy)(CO)3Cl] were successfully formed on the pore surfaces. The resulting Re−BPy(X)‐NTs exhibited efficient photocatalytic CO2 reduction in the presence of a sacrificial reductant under visible light. Re−BPy(X)‐NTs with higher BPy contents showed higher turnover numbers (TONs) and quantum yields than those previously obtained from periodic mesoporous organosilica systems. The photocatalytic activity of these materials was improved by the surface co‐immobilization of tris(2,2’‐bipyridine)ruthenium, [Ru(bpy)3]2+, on the Re−BPy(X)‐NTs as a photosensitizer, giving a quantum yield of 15 % in response to visible light (>385 nm). The value exceeds those previously reported for heterogeneous systems.
Organosilica nanotubes containing 2,2’‐bipyridine moieties can act as solid chelating ligands for the co‐immobilization of Re(bpy)(CO)3Cl and tris(2,2’‐bipyridine)ruthenium, [Ru(bpy)3]2+, functioning as a photocatalyst and photosensitizer, respectively. The resulting heterogeneous catalysis system exhibits efficient photocatalytic CO2 reduction in the presence of a sacrificial reagent in response to visible light.
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