Royal Society of Chemistry, Chemical Communications, 47, p. 6381
DOI: 10.1039/b813222d
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A metastable copper(II) 3D hybrid with 4,4'-bipyridine (4,4'-bipy) and P,P'-diphenylethylenediphosphinate (pc2p(2-)) undergoes a spontaneous, quantitative, transformation to a stable 2D polymorphic species either spontaneously in water, or after thermal dehydration followed by hydration.