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Boronic acid derivatized lanthanide–polyoxometalates with novel B–OH–Ln and B–O–Nb bridges
- Li, Shujun, Zhao, Yue, Qi, Huihui, Zhou, Yanfang, Liu, Shuxia, Ma, Xiaoming, Zhang, Jie, Chen, Xuenian
- Chemical communications 2019 v.55 no.17 pp. 2525-2528
- boronic acids, chemical reactions, ligands, pH
- Three new boronic acid derivatized lanthanide–polyoxometalates (BA-Ln–POMs) were synthesized, in which boronic acids served as bi- or tri-dentate ligands and exhibited interesting coordination ability towards POMs and Lnᴵᴵᴵ. The pH was found to be crucial in controlling the coordination modes of boronic acid and the formation of B–O–Ln and B–O–Nb bridges. Compared with the boronic acid-free Ln–POM, a longer lifetime was observed for compound 2Eu due to the coordination of boronic acids to the Euᴵᴵᴵ center.