Mixed pentasupertetrahedral P1 and supertetrahedral T2 clusters as building units to create two-dimensional indium chalcogenides open framework

A new two dimensional open framework indium chalcogenide [In12S21(Se)3H2], NCYU-5, constructed from pentasupertetrahedral P1 clusters, [In8S14(Se1/2)3H], and supertetrahedral T2 clusters, [In4S7(Se1/2)3H], has been prepared through hydrothermal method. Each T2 cluster is jointed with three P1 clusters via Se atoms to form an infinite two dimensional structure stacked along the crystallographic c axis. The ion-exchange studies show that the guest molecules (TMDP) can be exchanged by monocations (Na+, K+), and dications (Mg2+, Ca2+, Sr2+, Ba2+). In the typical exchanged solids by Ba2+ cations, the quantitative microanalysis data for the atomic ratio (Ba/Se) of Ba (1.86%) and Se (15.42%) is 12.05%. The luminescent output from the NCYU-5 cluster exhibits a temperature-dependent shift. A shift from λmax = 433 nm to λmax = 450 nm occurs as temperature increases from 77 K to 298 K.