Labile electronic ground state of the π-cation radical of zinc(II) tetraphenylporphyrin:: a variable-temperature ESR investigation

被引：0

作者：

Dave, PC ^{[1
]}

Srinivas, D ^{[1
]}

机构：

[1] Cent Salt & Marine Chem Res Inst, Sophisticated Analyt Instruments Lab, Bhavnagar 364002, Gujarat, India

来源：

JOURNAL OF PORPHYRINS AND PHTHALOCYANINES | 1998年 / 2卷 / 03期

关键词：

porphyrin; EPR; pi-cation; zinc(II) tetraphenylporphyrin; electronic ground state;

D O I：

10.1002/(SICI)1099-1409(199805/06)2:3<243::AID-JPP83>3.3.CO;2-B

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The UV-vis and variable-temperature X-band EPR spectral studies (298-77 K) on pi-cation of zinc(II) tetraphenylporphyrin (ZnTPP) have revealed for the first time a labile electronic ground state. The electronic structure changes from (2)A(2u) to (2)A(1u) as the temperature is lowered from 298 to 150 g Axial ligands and sigma-donor solvents show a significant effect on the spectral data. The lability in the ground state electronic configuration is attributed to the flexibility of the porphyrin moiety in changing from a 'ruffled' to a lower symmetry. (C) 1998 John Wiley & Sons, Ltd.

引用

页码：243 / 248

页数：6

共 37 条

[1] Molecular structure of the chloroiron(III) derivative of the meso-unsubstituted 2,7,12,17-tetramethyl-3,8,13,18-tetramesitylporphyrin and weak ferromagnetic exchange interactions in the A(1u) oxoiron(IV) porphyrin pi radical cation complex [J].