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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Photoreversible Molecular Motion of stpyCN Coordinated to fac-[Re(CO)(3)(NN)](+) Complexes
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Photoreversible Molecular Motion of stpyCN Coordinated to fac-[Re(CO)(3)(NN)](+) Complexes

机译:STPYCN的光耐心分子运动与FAC-[RE(CO)(3)(3)(NN)](+)复合物配位

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摘要

In this work, efficient trans reversible arrow cis photo-switchings of 4-(4-cyano)styrylpyridine (stpyCN) coordinated to organometallic bipyridyl tricarbonyl rhenium(I) complexes, fac-[Re(CO)(3)(NN)(trans-stpyCN)](+), where NN = 2,2'-bipyridine (bpy) or 4,4'-dimethyl-2,2'-bipyridine (dmb), are described. For both complexes, the true trans-to-cis quantum yields determined by H-1 NMR spectroscopy are similar at 313, 334, and 365 nm irradiations (Phi(true(313-365nm))(trans -)(cis)similar to 0.45), with a small decrease at 404 nm (Phi(true(404nm))(trans -)(cis)similar to 0.37). The investigated complexes also exhibit significant quantum yields for the reversible cis-to-trans photoreactions (Phi((255nm))(cis - trans) = 0.22). The luminescent properties of these complexes were also analyzed in different media to elucidate a key role of the (ILstpyCN)-I-3 state in photophysical and photochemical processes, giving new insights on their intriguing photobehavior.
机译:在这项工作中,有效的反向逆转箭头CIS光电切换为4-(4-氰基)吡啶(STPYCN),与有机金属双吡啶三羰基铼(I)配合物,FAC-[RE(CO)(3)(NN)(反式 描述了-STPYCN)](+),其中描述了NN = 2,2'-硼吡啶(BPY)或4,4'-二甲基-2,2,2'-硼吡啶(DMB)。 对于两种复合物,通过H-1 NMR光谱法测定的真正的反式-CIS量子产率在313,334和365nm照射(PHI(True(313-365nm))(Trans-&)(CIS)中相似 类似于0.45),在404nm(phi(true(404nm))(Trans-&)(CIS)中的少量降低,类似于0.37)。 所研究的配合物还表现出可逆的顺式对反应(PHI((255nm))(CIS-& Trans)= 0.22)的显着量子产率。 在不同培养基中还分析了这些配合物的发光特性,以阐明(ILSTPYCN)-I-3状态在光学和光化学过程中的关键作用,对其有趣的光侵蚀性进行了新的洞察。

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