Dynamic and static Jahn-Teller distortions in a CuN6 cage complex

Kundu, Tapan Kumar ; Manoharan, Periakaruppan T. (1995) Dynamic and static Jahn-Teller distortions in a CuN6 cage complex Chemical Physics Letters, 241 (5-6). pp. 627-634. ISSN 0009-2614

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0009-2614(95)00690-6


EPR studies of pure and doped (in an isostructural diamagnetic zinc lattice) polycrystalline [Cu(di(amH)sar)](NO3)4 over a wide range of temperature (7–280 K) show that both undergo a transition from dynamic to static Jahn-Teller distortions. The spectra were simulated to get the g- and A-tensors. The transition temperature for the pure polycrystalline sample is ⩽120 K and for the doped one it is above room temperature. There is evidence for the existence of cooperative and localized Jahn-Teller distortions respectively in pure and doped crystals. From the g-tensors of the pure polycrystalline sample there is evidence, supported by single-crystal results, of rapid electronic exchange between two inequivalent Cu(II) sites.

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