ELECTRON PARAMAGNETIC RESONANCE STUDIES OF SINGLE CRYSTAL SODIUM HEXAMOLYBDOCHROMATE (Ⅲ)Cr^(3+)/Na_3(AlMo_6O_(24)H_6)·8H_2O  

作　　者：游效曾 陈颉 韩世莹 眭云霞 

机构地区：[1]Coordination Chemistry Institute, Nanjing University [2]Centre of Materials Analysis, Nanjing University

出　　处：《Science China Chemistry》1991年第2期129-134,共6页中国科学（化学英文版）

摘　　要：An X-band EPR study on a Na_3(CrMo_6O_(24)H_6)·8H_2O single crystal diluted by its isomor-phic compound Na_3(AlMo_6O_(24)H_6)·8H_2O at room temperature is reported. Using the least squares-fitting method to simulate the EPR data for principal planes, the Hamiltonian parameterswere obtained. The principal values of the g tensors are g_(ZZ) = 1.904, g_(XX)= 1.973, g_(YY)=1.933. The zero field splitting tensor parameters are D = 0.275 cm^(-1), E = 0.05 cm^(-1). The fielddependence of Cr^(3+) energy levels with field at different angles from the principal axes whenthe field is along the principal planes is calculated based on these experimental parameters.The isofrequency plots of calculated field vs. angle are also shown. They agree well with theexperimental results.An X-band EPR study on a Na₃(CrMo₆O₂₄H₆)·8H₂O single crystal diluted by its isomor-phic compound Na₃(AlMo₆O₂₄H₆)·8H₂O at room temperature is reported. Using the least squares-fitting method to simulate the EPR data for principal planes, the Hamiltonian parameterswere obtained. The principal values of the g tensors are g_ZZ = 1.904, g_XX= 1.973, g_YY=1.933. The zero field splitting tensor parameters are D = 0.275 cm^-1, E = 0.05 cm^-1. The fielddependence of Cr³⁺ energy levels with field at different angles from the principal axes whenthe field is along the principal planes is calculated based on these experimental parameters.The isofrequency plots of calculated field vs. angle are also shown. They agree well with theexperimental results.

关 键 词：electron PARAMAGNETIC resonance PHOTOREACTION POLYOXOMOLYBDATES zero field SPLITTING 

分 类 号：O6[理学—化学]