作者: Yongliang Yong , Bin Song , Pimo He
DOI: 10.1039/C1CP21242G
关键词: Cluster (physics) 、 Fullerene 、 Nanoporous 、 Wurtzite crystal structure 、 Phase (matter) 、 Crystallography 、 Coalescence (physics) 、 Density functional theory 、 Stereochemistry 、 Bond length 、 Chemistry
摘要: We report the results of density functional theory calculations on cluster-assembled materials based M12N12 (M = Al, Ga) fullerene-like clusters. Our show that structure with six isolated four-membered rings (4NRs) and eight six-membered (6NRs) has a Th symmetry large HOMO–LUMO gap, indicating cluster would be ideal building blocks for synthesis materials. Via coalescence blocks, we find clusters can bind into stable assemblies by either 6NR or 4NR face coalescence, which enables construction rhombohedral cubic nanoporous framework varying porosity. The rhombohedral-MN phase is energetically more favorable than cubic-MN phase. structures in both phases are maintained M-N bond lengths between monomers slightly larger bulk wurtzite phases. band analysis reveals they all wide-gap semiconductors. Because character these phases, could used gas storage, heterogeneous catalysis, filtration so on.