Jin Jun-Ling, Xie Yun-Peng, Lu Xing
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering , Huazhong University of Science and Technology , Wuhan 430074 , China.
Inorg Chem. 2019 Jan 7;58(1):648-654. doi: 10.1021/acs.inorgchem.8b02811. Epub 2018 Dec 7.
tert-Butylphosphonic acid and rare-earth precursors are employed to construct four trinuclear rare-earth phosphonate clusters, RE( BuPO)(hfac)(CHOH)]·2CHOH (RE = Eu, Y, Pr, and Sm; hfac = hexafluoroacetylacetonate), which are composed of three RE ions alternately bridged by two phosphonates. With the introduction of bismuth oxido diketonate, [BiO(hfac)], three different types of rare-earth/bismuth phosphonate clusters, BiRE (RE = Pr and Sm), BiEu, and BiY, are successfully obtained via variation of the reaction conditions, and they are the first reported examples of bismuth-oxo clusters encapsulated by cyclic rare-earth-oxo or rare-earth/bismuth-oxo phosphonate clusters, respectively. These clusters show obvious absorption in the UV region, and the Eu-containing clusters exhibit bright-red fluorescence.
