Open AccessSTUDY THE STABLE STRUCTURES OF ScGe6 BY GA-DFT AND THE CO ADSORPTION ON ScGe6− CLUSTER
Author(s) -
Nguyen Minh Thao,
Bui Tho Thanh,
Nguyễn Thị Lan Hương
Publication year - 2021
Publication title -
khoa học và công nghệ
Language(s) - English
Resource type - Journals
ISSN - 2525-2267
DOI - 10.46242/jst-iuh.v44i02.1028
Subject(s) - pentagonal bipyramidal molecular geometry , bipyramid , cluster (spacecraft) , crystallography , atom (system on chip) , scandium , molecule , chemistry , tetragonal crystal system , adsorption , density functional theory , computational chemistry , crystal structure , inorganic chemistry , organic chemistry , computer science , programming language , embedded system
The structures of ScGe6 and ScGe6− clusters were investigated by a combination of genetic algorithm with quantum chemical calculations (GA-DFT and DLPNO-CCSD(T)). Results show that the two most stable isomers of the ScGe6 cluster have a pentagonal bipyramid structure with a Sc atom at the vertex and a Ge atom capping the face of tetragonal bipyramid with a Sc atom at the vertex with Cs symmetry. The pentagonal bipyramid with the scandium atom at the vertex with C5v symmetry is the most stable ScGe6− cluster. The CO adsorption on the most stable isomer of the anionic cluster was studied by PBE functional. The isomer A1 of ScGe6− cluster can adsorb CO molecule as well. The most stable structure has CO along with the Sc-Ge bond. In two adsorption models at the Sc atom along the main axis, the Sc-CO adsorption model is more favorable than the Sc-OC model.