All the IR spectra were measured in our institute using a Nicolet 170SX or a JASCO FT/IR-410. The spectral resolution for the Nicolet 170SX was 0.25 cm-1, and the spectral data were stored in the database at intervals of 0.5 cm-1 at 4000-2000 cm-1, and of 0.25 cm-1 at 2000-400 cm-1. On the other hand, the spectral resolution and the interval were 0.5 cm-1 for the JASCO FT/IR-410. Liquid samples were measured with liquid film method, and solid samples were measured by using KBr disc and Nujol paste methods.
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