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首页> 外文期刊>Journal of the Brazilian Chemical Society >Reverse saturable absorption in 5,10,15,20-Tetra(4-pyridyl)-21H,23H-porphyrin with ruthenium outlying complexes
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Reverse saturable absorption in 5,10,15,20-Tetra(4-pyridyl)-21H,23H-porphyrin with ruthenium outlying complexes

机译:5,10,15,20-四(4-吡啶基)-21H,23H-卟啉与钌外围配合物的反向饱和吸收

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Investigations on the excited state absorption signal of 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphyrin, modified by either changing the central ion or adding peripheral groups, were performed using 5 ns laser pulses at 532 nm, in association with linear absorbance and fluorescence decay time measurements. The reverse saturable absorption (RSA) increases remarkably when Zn2+ replaces H+ at the central position of the porphyrin ring. However, it decreases when RuCl2(CO)(PPh3)2 and RuCl2(CO)(dppb) groups are attached at outlying positions through the pyridine rings, for both the free base and zinc porphyrins. A theoretical model based on Jablonski diagram was used to verify the main reason for the decrease on the RSA signal caused by ruthenium groups.
机译:在532处使用5 ns激光脉冲对通过改变中心离子或添加外围基团修饰的5,10,15,20-四(4-吡啶基)-21H,23H-卟啉的激发态吸收信号进行了研究线性吸光度和荧光衰减时间测量。当Zn2 +取代卟啉环中心位置的H +时,反向饱和吸收(RSA)显着增加。但是,对于游离碱和卟啉锌,当RuCl2(CO)(PPh3)2和RuCl2(CO)(dppb)基团通过吡啶环连接在外部位置时,其降低。用基于Jablonski图的理论模型验证了钌基引起RSA信号下降的主要原因。

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