Single-layer electroluminescent devices and photoinduced hydrogen production from an ionic iridium(III) complex
Single-layer electroluminescent devices and photoinduced hydrogen production from an ionic iridium(III) complex
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DOI：
10.1021/cm051312
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发表时间：
2005-11-15
影响因子：
8.6
通讯作者：
Bernhard, S
中科院分区：
文献类型：
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作者：
Lowry, MS;Goldsmith, JI;Bernhard, S
我们报道了一种高发光离子过渡金属配合物[Ir(dF(CF3)PPY)(2)(dtbbpy)](PF6)(其中dF（CF3)PPY = 2-（2,4-二氟苯基）-5-三氟甲基吡啶，dtbbpy = 4,4'-二叔丁基-2,2'-二吡啶）的电子结构和多种应用。大的HOMO-LUMO隙（δ E = 3.06 V）使配合物产生高能电致发光。单层器件被制造出来，并被发现发出蓝绿光（500 nm）。激发态的强还原强度（Esse = 1.21 V）能有效催化光诱导H2O还原为H-2。与标准光敏剂Ru(dmphen)(3)(2+) （dmphen = 4,7-二甲基-1,10-菲罗啉）相比，氢的相对量子产率提高了一个数量级以上。
We report the electronic structure and diverse applications of a highly luminescent ionic transition metal complex, [Ir(dF(CF3)PPY)(2)(dtbbpy)](PF6) (where dF(CF3)ppy = 2-(2,4-difluorophenyl)-5-trifluoromethylpyridine and dtbbpy = 4,4'-di-tert-butyl-2,2'-dipyridyl). The large HOMO-LUMO gap (Delta E = 3.06 V) enabled high-energy electroluminescence from the complex. Single-layer devices were fabricated and found to emit blue-green light (500 nm). The strong reducing strength of the excited state (Esse = 1.21 V) enabled effective catalysis of the photoinduced reduction of H2O to H-2. It was found that the relative quantum yield of hydrogen was over an order of magnitude improved from the standard photosensitizer Ru(dmphen)(3)(2+) (dmphen = 4,7-dimethyl-1,10-phenanthroline).