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首页> 外文期刊>Chemistry: A European journal >New Ru-II Complex for Dual Activity: Photoinduced Ligand Release and O-1(2) Production
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New Ru-II Complex for Dual Activity: Photoinduced Ligand Release and O-1(2) Production

机译：新的Ru-II复合物具有双重活性：光诱导的配体释放和O-1（2）的产生

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摘要

The new complex [Ru(pydppn)(biq)(py)](2+) (1) undergoes both py photodissociation in CH3CN with phi(500)=0.0070(4) and O-1(2) production with phi=0.75(7) in CH3OH from a long-lived (3)* state centered on the pydppn ligand (pydppn=3-(pyrid-2-yl)benzo[i]dipyrido[3,2-a:2,3-c]phenazine; biq = 2,2-biquinoline; py=pyridine). This represents an order of magnitude decrease in the phi(500) compared to the previously reported model compound [Ru(tpy)(biq)(py)](2+) (3) (tpy=2,2:6,2-terpyridine) that undergoes only ligand exchange. The effect on the quantum yields by the addition of a second deactivation pathway through the low-lying (3)* state necessary for dual reactivity was investigated using ultrafast and nanosecond transient absorption spectroscopy, revealing a significantly shorter (MLCT)-M-3 lifetime in 1 relative to that of the model complex 3. Due to the structural similarities between the two compounds, the lower values of phi(500) and phi compared to that of [Ru(pydppn)(bpy)(py)](2+) (2) (bpy=2,2-bipyridine) are attributed to a competitive excited state population between the (LF)-L-3 states involved in ligand dissociation and the long-lived (3)* state in 1. Complex 1 represents a model compound for dual activity that may be applied to photochemotherapy.
机译：新的复合物[Ru（pydppn）（biq）（py）]（2+）（1）在phi（500）= 0.0070（4）的CH3CN和phi = 0.75的O-1（2）生产中都进行py光解离（7）在CH3OH中以pydppn配体为中心的长寿命（3）*状态（pydppn = 3-（pyrid-2-yl）benzo [i] dipyrido [3,2-a：2,3-c]吩嗪; biq = 2,2-联喹啉; py =吡啶）。与先前报道的模型化合物[Ru（tpy）（biq）（py）]（2+）（3）相比，这表示phi（500）下降了一个数量级（tpy = 2,2：6,2-只能进行配体交换的三联吡啶）。使用超快和纳秒瞬态吸收光谱研究了通过双重反应所必需的低位（3）*状态添加第二个失活途径对量子产率的影响，揭示了显着更短的（MLCT）-M-3寿命相对于模型复合物3而言，相对于[Ru（pydppn）（bpy）（py）]（2+）而言，由于两种化合物的结构相似性，phi（500）和phi的值较低）（2）（bpy = 2,2-联吡啶）归因于参与配体解离的（LF）-L-3状态与1中的长寿命（3）*状态之间的竞争性激发态种群。代表双重活性的模型化合物，可应用于光化学疗法。

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