文摘
Alkali metals were introduced into heavy main-group iodometallates to get two new IA/IVAheterometallic frameworks [PbI3K(pdon)(H2O)2] n (1) and {[Pb3 I 9 K 2(pdon)2(H3O)] ?em class="EmphasisTypeItalic ">H 2O} n (2) (pdon =1,10-phenanthroline-5,6-dione), which were obtained as single phases by hydrothermal method at different pH values. Compounds 1 and 2 are three-dimensional heterometallic frameworks constructed from the linkage of pdon ligand between iodometallate chains and potassium oxides/iodide clusters. Specially, these two heterometallic frameworks exhibit broadened absorption bands at 700 and 750 nm compared with those of bulk PbI2 and pdon ligand. The band gap of 2 is wider than that of 1, which is due to the absence of π?em class="EmphasisTypeItalic ">π interaction in 2. Their thermal stabilities are also discussed.