ESR STUDY OF CUCL2 ADSORBED ON A CHEMICALLY-MODIFIED SILICA-GEL SURFACE WITH BENZIMIDAZOLE MOLECULE

被引：10

作者：

DIAS, NL ^{[1
]}

GUSHIKEM, Y ^{[1
]}

机构：

[1] UNICAMP, INST QUIM, BR-13081970 CAMPINAS, SP, BRAZIL

来源：

THEOCHEM-JOURNAL OF MOLECULAR STRUCTURE | 1995年 / 335卷

关键词：

D O I：

10.1016/0166-1280(94)03998-Z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ESR spectrum of CuCl2 adsorbed onto a silica gel surface chemically modified with the benzimidazole molecule showed that the surface complex has an octahedral symmetry with tetragonal distortion. The measured ESR parameters were g(parallel to) = 2.287, g(perpendicular to) = 2.062, A(parallel to) = 153 G and superhyperfine splitting A(N) = 15 G. The fit of the theoretical expressions to the experimental data was very reasonable. The effective spin orbit coupling constant for Cu2+ was reduced from its normal free ion value of lambda = -828 cm(-1) by as much as 30%. This reduction of lambda is normal in the solid state and in frozen solution complexes.

引用

页码：175 / 180

页数：6

共 26 条

[1] ADSORPTION AND STRUCTURE OF METAL-ION COMPLEXES WITH PIPERAZINE GROUPS GRAFTED ON SILICA-GEL SURFACE [J].