Two microporous copper isonicotinate polymers [Cu(OH)(INA)] and [Cu(INA)2] have been formed hydrothermally in good yield and purity; each have 1D channels of ca. 4 x 6 A dimension, but with quite different hydrophilicities; both frameworks retain structural integrity to above 200 degrees C, however whilst [Cu(OH)(INA)] is also chemically stable, [Cu(INA)2] is highly labile and readily transforms to the molecular complex [Cu(INA)2(H2O)4] in water at room temperature.
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Lin et al. (2002) studied this question.
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