Electron Transfer from Excited [Ir(2-phenylpyridyl)3]through a Coexisting Electron Relay in Zeolite
Electron Transfer from Excited [Ir(2-phenylpyridyl)3]through a Coexisting Electron Relay in Zeolite
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激发的 [Ir(2-苯基吡啶基)3] 通过沸石中共存电子继电器的电子转移
DOI：
10.1002/ejic.201301431
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Shin Jo,Dai Mochizuki,Masato Maitani,Yuji Wada
中科院分区：
文献类型：
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作者：
Fuminao Kishimoto;Dai Mochizuki;Kozue Kumagai;Masato M. Maitani;Eiichi Suzuki;Yuji Wada;Shin Jo,Dai Mochizuki,Masato Maitani,Yuji Wada
研究了分散在溶液中的faujasite沸石超笼中包裹的偶金属化ii13配合物与溶解在溶液中的紫堇衍生物之间的光致电子转移。沸石溶液界面上的电子传递速率比溶液中自由分子之间的电子传递速率慢310倍。为了促进电子转移，通过离子交换将1,1′‐乙烯‐2,2′‐联吡啶作为电子继电器引入沸石中。当将三乙醇胺（TEOA）作为牺牲电子供体加入到分散溶液中时，超笼中的2DQ2+在光照射下被还原为2DQ·+自由基阳离子，这可以解释为电子供体TEOA在溶液中通过沸石溶液界面将iriiiccomplexes的激发态电子转移到2DQ2+，并通过还原生成的氧化配合物使配合物再生。一个电子通过沸石骨架从超笼中形成的2DQ·+自由基阳离子转移到溶液中的紫紫素磺酸丙酯上。该系统证明了沸石等固体载体材料对电子转移的可控性。
Photoinduced electron transfer was investigated between anortho‐metalated IrIIIcomplex encapsulated in the supercage of faujasite zeolite dispersed in solution and viologen derivatives dissolved in the solution. The electron‐transfer rate across the zeolite solution interface was 310 times slower than that between the free molecules in solution. To facilitate electron transfer, 1,1′‐ethylene‐2,2′‐bipyridyldiylium (diquat = 2DQ2+) was introduced as an electron relay into the zeolite by ion exchange. When triethanolamine (TEOA) was added as a sacrificial electron donor into the dispersion solution, the 2DQ2+in the supercages was reduced to 2DQ·+radical cation under light irradiation, which can be explained as the electron transfer from the excited state of the IrIIIcomplex to 2DQ2+, and the regeneration of the complex through the reduction of the resulting oxidized complex by the electron donor TEOA in the solution through the zeolite solution interface. An electron is transferred through the zeolite framework from the 2DQ·+radical cation formed in the supercage to propyl viologen sulfonate in the solution. This system demonstrates controllability of the electron transfer by solid host materials such as zeolites.