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Cr交换丝光沸石在氢气氛中强烈还原并冷却后,出现了一个各向同性的EPR信号,g值2.003,△Hpp 13.4 gauss.采用EHMO方法计算了各种可能模型化合物的g值,结果建议这一信号对应Cr(V)与H_2分子形成的络合物。
After the Cr-exchanged mordenite was reduced strongly and cooled in a hydrogen atmosphere, an isotropic EPR signal appeared, with a g value of 2.003 and a ΔHpp of 13.4 gauss. The g values of the various possible model compounds were calculated using the EHMO method. A signal corresponds to the complex of Cr (V) and H 2 molecules.