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

Metal Chalcogenides Tetrahedral Molecular Clusters: Crystal Engineering and Properties

“…Interestingly, Yang et al employ 4,4-trimethylene dipiperidine (TMDP), and histidine as the structure-directing agents for the synthesis of compound with mixed supertetrahedralchalcogenide clusters T2, and pentasupertetrahedralchalcogenide clusters P1, denoted as NCYU-5, (NCYUis named after National Chia Yi University), shown in Figure 6. [36]The TMDP is widely used as a structure construction template in the synthesis of Tn series chalcogenide clusters. [37] However, the use of amino acid in the hydrothermal synthesis for an inorganic tetrahedral cluster has not been reported.…”

“…The thermogravimetric analysis (TGA) data of NCYU-5 is given in Figure 8. [36]The total weight loss is 26. 72% from RT to 505 °C.…”

“…[41]The luminescence of open framework chalcogenidesis known to be related with the highly negatively charged inorganic framework and the presence of protonated guest amine molecules. [41,42]On the top of this review point, Se exhibits a better induced optoelectronic property than S because the ionization energy barrier of Se is much lower than that of S. [36,43,44] Based on this understanding, Yang et al prepared the Se doped metal chalcogenides tetrahedral molecular clusters, i. e. NCYU family, to study the optoelectronic luminescent phenomena induced by the quantum confinement of Se in these clusters. The clusters prepared by Yang's group include NCYU-1 (T4/Se), NCYU-3 (T3/Se), and NCYU-5 (mixed P1+T2/Se).…”

“…The clusters prepared by Yang's group include NCYU-1 (T4/Se), NCYU-3 (T3/Se), and NCYU-5 (mixed P1+T2/Se). [36,43,44]Two PL emission peaks, centered at about 457 nm and 538 nm, were revealed from the NCYU-3(T3/Se). But only the 457 nm peak is observed in the spectra of NCYU-InS-AEAE (T3)(AEAE= 2-(2-aminoethylamino)ethanol) and NCYU-4 (T3).…”

“…The calculated occupancy possibility of the Se(1) site for Se to S is ~90%. The occupancy possibility of the S3 site in the T2 cluster for Se to S is ~10% [36].…”