Journal
SYNTHETIC METALS
Volume 154, Issue 1-3, Pages 89-92Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2005.07.006
Keywords
transport measurements; ion conductivity; conjugated conducting polymers; fuel cells
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A novel proton-conductive copper coordination polymer, (H5C2)(2)dtoaCu (R(2)dtoaH(2) = dithiooxamidc derivatives), was synthesized. From X-ray powder diffraction measurements, the crystal structure of (H5C2)(2)dtoaCu was found to be similar to that of a two-dimensional (2-D) coordination polymer (HOH4C2)(2)dtoaCu. This title coordination polymer was revealed to be a proton conductor by the relative humidity (RH) dependence of AC conductivity measurements. The proton conductivity (sigma(p)) was 4.2 x 10(-6) S cm(-1) under the RH of 100 % and the ionic transport number was more than 0.99. The sigma(p) of (HOH4C2)(2)dtoaCu was two orders of magnitude higher than that of (H5C2)(2)dtoaCu, which would be derived from the existence of -OH groups in the alkyl substituent R.
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