1
|
Jiang Y, Aireti M, Leng X, Ji X, Liu J, Cui X, Duan H, Jing Q, Cao H. Structures, Electronic, and Magnetic Properties of CoK n ( n = 2-12) Clusters: A Particle Swarm Optimization Prediction Jointed with First-Principles Investigation. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2155. [PMID: 37570473 PMCID: PMC10420966 DOI: 10.3390/nano13152155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/19/2023] [Accepted: 07/21/2023] [Indexed: 08/13/2023]
Abstract
Transition-metal-doped clusters have long been attracting great attention due to their unique geometries and interesting physical and/or chemical properties. In this paper, the geometries of the lowest- and lower-energy CoKn (n = 2-12) clusters have been screened out using particle swarm optimization and first principles relaxation. The results show that except for CoK2 the other CoKn (n = 3-12) clusters are all three-dimensional structures, and CoK7 is the transition structure from which the lowest energy structures are cobalt atom-centered cage-like structures. The stability, the electronic structures, and the magnetic properties of CoKn clusters (n = 2-12) clusters are further investigated using the first principles method. The results show that the medium-sized clusters whose geometries are cage-like structures are more stable than smaller-sized clusters. The electronic configuration of CoKn clusters could be described as 1S1P1D according to the spherical jellium model. The main components of petal-shaped D molecular orbitals are Co-d and K-s states or Co-d and Co-s states, and the main components of sphere-like S molecular orbitals or spindle-like P molecular orbitals are K-s states or Co-s states. Co atoms give the main contribution to the total magnetic moments, and K atoms can either enhance or attenuate the total magnetic moments. CoKn (n = 5-8) clusters have relatively large magnetic moments, which has a relation to the strong Co-K bond and the large amount of charge transfer. CoK4 could be a magnetic superatom with a large magnetic moment of 5 μB.
Collapse
Affiliation(s)
- Yi Jiang
- Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, 777 Huarui Road, Urumqi 830017, China; (Y.J.); (M.A.); (X.L.); (X.J.); (J.L.); (Q.J.)
- School of Physical Science and Technology, Xinjiang University, 777 Huarui Road, Urumqi 830017, China
| | - Maidina Aireti
- Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, 777 Huarui Road, Urumqi 830017, China; (Y.J.); (M.A.); (X.L.); (X.J.); (J.L.); (Q.J.)
- School of Physical Science and Technology, Xinjiang University, 777 Huarui Road, Urumqi 830017, China
| | - Xudong Leng
- Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, 777 Huarui Road, Urumqi 830017, China; (Y.J.); (M.A.); (X.L.); (X.J.); (J.L.); (Q.J.)
- School of Physical Science and Technology, Xinjiang University, 777 Huarui Road, Urumqi 830017, China
| | - Xu Ji
- Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, 777 Huarui Road, Urumqi 830017, China; (Y.J.); (M.A.); (X.L.); (X.J.); (J.L.); (Q.J.)
- School of Physical Science and Technology, Xinjiang University, 777 Huarui Road, Urumqi 830017, China
| | - Jing Liu
- Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, 777 Huarui Road, Urumqi 830017, China; (Y.J.); (M.A.); (X.L.); (X.J.); (J.L.); (Q.J.)
- School of Physical Science and Technology, Xinjiang University, 777 Huarui Road, Urumqi 830017, China
| | - Xiuhua Cui
- Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, 777 Huarui Road, Urumqi 830017, China; (Y.J.); (M.A.); (X.L.); (X.J.); (J.L.); (Q.J.)
- School of Physical Science and Technology, Xinjiang University, 777 Huarui Road, Urumqi 830017, China
| | - Haiming Duan
- Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, 777 Huarui Road, Urumqi 830017, China; (Y.J.); (M.A.); (X.L.); (X.J.); (J.L.); (Q.J.)
- School of Physical Science and Technology, Xinjiang University, 777 Huarui Road, Urumqi 830017, China
| | - Qun Jing
- Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, 777 Huarui Road, Urumqi 830017, China; (Y.J.); (M.A.); (X.L.); (X.J.); (J.L.); (Q.J.)
- School of Physical Science and Technology, Xinjiang University, 777 Huarui Road, Urumqi 830017, China
| | - Haibin Cao
- Department of Physics, College of Sciences, Shihezi University, Shihezi 832000, China;
| |
Collapse
|
2
|
Sun Q, Gieseking RLM. Parametrization of the PM7 Semiempirical Quantum Mechanical Method for Silver Nanoclusters. J Phys Chem A 2022; 126:6558-6569. [PMID: 36082665 DOI: 10.1021/acs.jpca.2c05782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Semiempirical quantum mechanical methods (SEQMs) are widely used in computational chemistry because of their low computational cost, but their accuracy depends on the quality of the parameters. The neglect of diatomic differential overlap method PM7 is among the few SEQMs that contain parameters for Ag, but the experimental reference data was insufficient to obtain reliable parameters in the original parametrization. In this work, we reparametrize the PM7 parameters for Ag to accurately reproduce the ground-state potential energy surfaces of Ag clusters. Since little experimental data is available, we use reference data obtained from the ab initio method CCSD(T). The resulting parameters significantly reduce the errors in binding energies, energies required to displace clusters along their normal modes, and relative energies of isomers compared to the default PM7 Ag parameters.
Collapse
Affiliation(s)
- Qiwei Sun
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
| | - Rebecca L M Gieseking
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
| |
Collapse
|
3
|
Fernández EM, Balbás LC. Interactions of Nitric Oxide Molecules with Pure and Oxidized Silver ClustersAg n{plus minus}/Ag nO {plus minus} (n=11-13). A Computational Study. J Chem Phys 2022; 157:074310. [DOI: 10.1063/5.0094996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this work we studied, within DFT, the interaction of NO with pure and oxidized Agn, both anionic and cationic, composed from11 to 13 Ag atoms. In that size interval, shell closing effects are not expected, and structural and electronic odd-even effects will determine the strength of interaction. We obtained that species Agn{plus minus} and AgnO{plus minus} with odd number of electrons (n=12) adsorb NO with higher energy than their neighbours. This result agrees with the facts observed in recent mass spectroscopy measurements, which were performed at finite temperature. The adsorption energy is about twice for oxidized clusters compared to pure ones, and higher for anions than for cations. The adsorption of another NO molecule on AgnNO{plus minus} forms Agn(NO)2{plus minus}, with the dimer (NO)2 in cis configuration, and binding the two N atoms with two neigbour Ag atoms. The n=12 show the higher adsorption energy again. In absence of reaction barriers, Agn(NO)2{plus minus} dissociate spontaneously into AgnO{plus minus} and N2O, except the n= 12 anion. The máximum high barrier along the dissociation path of Ag13(NO)2- is about 0.7 eV. Further analysis of PDOS for Ag11-13 (NO)x{plus minus} (x=0,1,2) molecules shows that bonding between NO and Agn mainly occurs in the range between -3.0 eV and 3.0 eV. The overlap between 4 d of Ag and 2 p of N and O is larger for Ag12(NO)2{plus minus} than for neighbour sizes. For n=12, the d bands are close to the (NO)2 2π orbital, leading to extra back-donation charge from the 4 d of Ag to the closer 2π orbital of (NO)2.
Collapse
Affiliation(s)
- Eva M. Fernández
- Fisica Fundamental, Universidad Nacional de Educación a Distancia, Spain
| | - Luis Carlos Balbás
- Departamento de Física Teórica, Atómica y Óptica, University of Valladolid - Miguel Delibes Campus, Spain
| |
Collapse
|
4
|
Gong ZY, Sun ZQ, Ding YW, Zhang S, Lv ZL, Wang XF, Li LB, Li HS. Reduction of dimerization tendency due to the decrease in
hybridization index by inclusion of 4s and 4p semicore states as valence states
in Mon (n = 2 − 18)
clusters: A first-principles study. CHINESE J CHEM PHYS 2021. [DOI: 10.1063/1674-0068/cjcp2009169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Zhao-ye Gong
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Zhi-qiang Sun
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Yan-wen Ding
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Shuai Zhang
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Zhen-long Lv
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Xiao-fei Wang
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Li-ben Li
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Hai-sheng Li
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| |
Collapse
|