Switching the Jahn-Teller distortion in crystalline ammonium hexaaquacopper sulfate (Tutton salt) with infrared radiation

被引:16
作者
Chen, Z [1 ]
Fei, S [1 ]
Strauss, HL [1 ]
机构
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
关键词
D O I
10.1021/ja980782k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The N-D and O-D stretching regions of the infrared spectrum of (NH4)(2)[Cu(H2O)(6)]SO4 doped with a small amount of deuterium reflect the known structure of the crystals at 7 K. Irradiation at the wavenumber of any one of the N-D bands yields spectral holes and antiholes that are doubled, indicating the presence of two different conformations in the crystals. The infrared-induced changes in the N-D bands are coupled to the changes in the O-D bands, and these in turn are coupled to the Jahn-Teller distortions about the copper. The holes and antiholes decay back to equilibrium in a complicated nonmonotonic way. Irradiating the O-D bands also produces holes and antiholes in contrast to the situation for other Tutton salts.
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收藏
页码:8789 / 8796
页数:8
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