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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Photophysical and Electrochemical Properties of meso-Substituted Thien-2-yl Zn(II) Porphyrins
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Photophysical and Electrochemical Properties of meso-Substituted Thien-2-yl Zn(II) Porphyrins

机译:介孔取代的Thien-2-基Zn(II)卟啉的光物理和电化学性质

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摘要

The influence of the thiophene ring on the ground and excited state properties of the porphyrin ring is investigated, when substituted at the mew-position. A series of mono-, di-, tri-, and tetra-meso-thien-2-yl porphyrins are studied and discussed with respect to the reference compounds zinc(II)-5,10,15,20-tetra(thien-2'-yl)porphyrin (1a) and zinc(II)-5,10,15,20-tetraphenylporphyrin (ZnTPP). The extended conjugated system zinc(II)-5-(5'-(5"-ethynyl-2"-thiophenecarboxaldehyde)thien-2'-yl)-10,15,20-triphenylporphyrin (4d) is also studied and shows enhanced charge transfer character due to the presence of the terminal aldehyde accepting group. A detailed analysis of ground and excited state UV—vis absorption, steady-state and time-resolved fluorescence, laser flash photolysis, and electrochemical data all point toward substantial electronic communication between the central Zn(II) porphyrin ring and the meso-thien-2-yl substituents, which is evident from excited state charge transfer character.
机译:当在喵喵位置取代时,研究了噻吩环对卟啉环的基态和激发态性质的影响。关于参考化合物锌(II)-5,10,15,20-四(thien-),研究和讨论了一系列的单,二,三和四-间-噻吩-2-基卟啉。 2'-基)卟啉(1a)和锌(II)-5,10,15,20-四苯基卟啉(ZnTPP)。还研究了扩展的共轭体系锌(II)-5-(5'-(5“-乙炔基-2”-噻吩甲醛)噻吩-2'-基)-10,15,20-三苯基卟啉(4d)由于末端醛接受基团的存在,电荷转移特性。对基态和激发态UV的详细分析,包括吸收,稳态和时间分辨的荧光,激光闪光光解以及电化学数据,所有这些都表明中心的Zn(II)卟啉环与中消旋的2-基取代基,从激发态电荷转移特性可以明显看出。

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