Raman bandwidths of in-phase V_1 mode in Pinacol hexahydrate and piperazine hexahydrate

摘要

The Raman bandwidths of the in-phase V_1 mode in pinacol hexahydrate and piperazine hexahydrate with two- dimensionally hydrogen-bonded networks were observed below room temperature. The changes in the bandwidth with temperature were analysed on the basis of the scattering of the in-phase v_1 mode by low-wavenumber phonons through the anharmonic coupling. The results re compared with those for ice Ih and the difference in the scattering process between the present systems and ice Ih is discussed.