Abstract
Abstract The synthesis of two new lead(II) coordination polymers, [Pb 2 (mpic) 4 (H 2 O)]·0.5H 2 O ( 1 ) and [Pb 2 (phen) 2 (cit)(mes)]·2H 2 O ( 2 ) has been reported, where mpic=3-methyl picolinate, phen= o -phenanthroline, H 2 cit=citraconic acid, H 2 mes mesaconic acid. X-ray single crystal diffraction analyses showed that the complexes comprise topologically different 1D polymeric chains stabilized by weak interactions and both containing tetranuclear Pb 4 units connected by carboxylate groups. In compound 1 3-methylpicolinic acid is formed in situ from 3-methyl piconitrile, and mesaconate and citraconate anions were surprisingly formed from itaconic acid during the synthesis of 2. The photoluminescence and thermal properties of the complexes have been studied.
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