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Chen Q, Li B, Wang J, Zhu H, Chen X, Hu Y, Zhou J, Wang W, Zheng W, Yan T. Selective coordination behaviors of Uranium(VI) with novel asymmetrical tetra-alkylcarbamides. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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2
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Abstract
Dative bonds between identical atoms of the same formal oxidation state are formed as geometric and electronic constraints turn an otherwise lone pair into a bond. Calculations at the B3LYP/6-31+g(d,p) level supported by additional atoms in molecules (AIM) and electron localization function (ELF) analyses on selected germanium polycations are used to prove the concept. The electron density (ρ) is not equally shared between the two atoms of such a homonuclear dative bond (HDB), and the associated charge transfer results in formal charges contradicting chemical convention.
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Affiliation(s)
- Timm Lankau
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chin Hui Yu
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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3
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Pham HT, Nguyen MT. Theoretical Investigation of Metallic Heterofullerenes of Silicon and Germanium Mixed with Phosphorus and Arsenic Atoms M-A8E6, A = Si, Ge; E = P, As; and M = Cr, Mo, W. J Phys Chem A 2017; 121:5056-5066. [DOI: 10.1021/acs.jpca.7b04631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hung Tan Pham
- Computational Chemistry
Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Minh Tho Nguyen
- Computational Chemistry
Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Department of Chemistry, KU Leuven, Celestijnenlaan
200F, B-3001 Leuven, Belgium
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Siouani C, Mahtout S, Safer S, Rabilloud F. Structure, Stability, and Electronic and Magnetic Properties of VGe n (n = 1-19) Clusters. J Phys Chem A 2017; 121:3540-3554. [PMID: 28415843 DOI: 10.1021/acs.jpca.7b00881] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We systematically study the equilibrium geometries and electronic and magnetic properties of Gen+1 and VGen (n = 1-19) clusters using the density functional theory approach within the generalized gradient approximation. Endohedral structures in which the vanadium atom is encapsulated inside a Gen cage are predicted to be favored for n ≥ 10. The dopant V atom in the Gen clusters has not an immediate effect on the stability of small germanium clusters (n < 6), but it largely contributes to strengthen the stability for n ≥ 7. Our study enhances the large stability of the VGe14 cluster, which presents an Oh symmetry cagelike geometry and a peculiar electronic structure in which the valence electrons of V and Ge atoms are delocalized and exhibit a shell structure associated with the quasi-spherical geometry. Consequently, this cluster is proposed to be a good candidate to be used as the building blocks for developing new materials. The cluster size dependence of the stability, the vertical ionization potentials, and electron affinities of Gen+1 and VGen are presented. Magnetic properties and the partial density of states of the most stable VGen clusters are also discussed.
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Affiliation(s)
- C Siouani
- Laboratoire de Physique Théorique, Faculté des Sciences Exactes, Université de Bejaia , 06000 Bejaia, Algérie
| | - S Mahtout
- Laboratoire de Physique Théorique, Faculté des Sciences Exactes, Université de Bejaia , 06000 Bejaia, Algérie
| | - S Safer
- Laboratoire de Physique Théorique, Faculté des Sciences Exactes, Université de Bejaia , 06000 Bejaia, Algérie
| | - F Rabilloud
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière , F-69622 Villeurbanne, France
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5
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Fioressi SE, Bacelo DE. Structures and energetics of Be nGe n ( n = 1–5) and Be 2nGe n ( n = 1–4) clusters. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1303204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Silvina E. Fioressi
- Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Belgrano, Buenos Aires, Argentina
| | - Daniel E. Bacelo
- Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Belgrano, Buenos Aires, Argentina
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Gopakumar G, Sreenivasulu B, Suresh A, Brahmmananda Rao CVS, Sivaraman N, Joseph M, Anoop A. Complexation Behavior of the Tri-n-butyl Phosphate Ligand with Pu(IV) and Zr(IV): A Computational Study. J Phys Chem A 2016; 120:4201-10. [PMID: 27248966 DOI: 10.1021/acs.jpca.6b02668] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tri-n-butyl phosphate (TBP), used as the extractant in nuclear fuel reprocessing, shows superior extraction abilities for Pu(IV) over a large number of fission products including Zr(IV). We have applied density functional theory (DFT) calculations to explain this selectivity by investigating differences in electronic structures of Pu(NO3)4·2TBP and Zr(NO3)4·2TBP complexes. On the basis of our quantum chemical calculations, we have established the lowest energy electronic states for both complexes; the quintet is the ground state for the former, whereas the latter exists in the singlet spin state. The calculated structural parameters for the optimized geometry of the plutonium complex are in agreement with the experimental results. Atoms in Molecules analysis revealed a considerable amount of ionic character to M-O{TBP} and M-O{NO3} bonds. Additionally, we have also investigated the extraction behavior of TBP for metal nitrates and have estimated the extraction energies to be -73.1 and -57.6 kcal/mol for Pu(IV) and Zr(IV), respectively. The large extraction energy of Pu(IV) system is in agreement with the observed selectivity in the extraction of Pu.
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Affiliation(s)
- Gopinadhanpillai Gopakumar
- Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research , Kalpakkam, Tamil Nadu 603 102, India
| | - B Sreenivasulu
- Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research , Kalpakkam, Tamil Nadu 603 102, India
| | - A Suresh
- Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research , Kalpakkam, Tamil Nadu 603 102, India
| | - C V S Brahmmananda Rao
- Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research , Kalpakkam, Tamil Nadu 603 102, India
| | - N Sivaraman
- Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research , Kalpakkam, Tamil Nadu 603 102, India
| | - M Joseph
- Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research , Kalpakkam, Tamil Nadu 603 102, India
| | - Anakuthil Anoop
- Department of Chemistry, Indian Institute of Technology , Kharagpur, West Bengal 721 302, India
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Adeniyi AA, Ajibade PA. The spectroscopic and the QTAIM properties of pyridine and phenanthroline derivatives using experimental and computational methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 128:540-551. [PMID: 24691368 DOI: 10.1016/j.saa.2014.02.103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/14/2014] [Accepted: 02/16/2014] [Indexed: 06/03/2023]
Abstract
The experimental and theoretical properties of ligands consisting of pyridine and phenanthroline derivatives have been studied. The results show a very high correlation between the experimental and theoretical spectroscopic properties of the ligands such as the IR, NMR chemical shift and UV. The carboxylic units in the ligands lead to increase in the dipole and anisotropic properties of the molecules while the methyl group lead to increase in the isotropic shielding tensor of the molecules. Most of the observed UV λmax in the ligands are predominantly excitation of electrons from the HOMO-2 or HOMO-1 or HOMO to the LUMO of the ligands. The ligand 2,2-dicarboxylphenanthroline (dcphn) is predicted to be the best starting material for non-linear optical (NLO) application due to its far higher first static hyperpolarizability tensor compare to other ligands and its lowest band gap. The same ligand can also be best for DNA binding because it has the lowest value of LUMO. The atomic charge of the nitrogen is found to be highly correlated with molecular HOMO, LUMO and non-Lewis orbital. The (15)N NMR chemical shift is found to be highly correlated atomic anisotropy, energy and intra-atomic isotropic shielding tensor.
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Affiliation(s)
- Adebayo A Adeniyi
- Department of Chemistry, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
| | - Peter A Ajibade
- Department of Chemistry, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa.
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8
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Adeniyi AA, Ajibade PA. Synthesis of pyrazole derivatives and their spectroscopic properties investigated using both experimental and theoretical approaches. NEW J CHEM 2014. [DOI: 10.1039/c4nj00536h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Adeniyi AA, Ajibade PA. Computational properties of η6-toluene and η6-trifluorotoluene half-sandwich Ru(II) anticancer complexes. J Biomol Struct Dyn 2013; 32:1351-65. [DOI: 10.1080/07391102.2013.819299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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10
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De Haeck J, Tai TB, Bhattacharyya S, Le HT, Janssens E, Nguyen MT, Lievens P. Structures and ionization energies of small lithium doped germanium clusters. Phys Chem Chem Phys 2013; 15:5151-62. [DOI: 10.1039/c3cp44395g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Tomosada AE, Kim S, Osamura Y, Yang SW, Chang AH, Kaiser RI. First detection of the silylgermylene (H3SiGeH) and D4-silylgermylene (D3SiGeD) molecules in low temperature silane–germane ices. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2012.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Tai TB, Tam NM, Nguyen MT. Evolution of structures and stabilities of zinc-doped tin clusters SnnZn, n=1–12. Three-dimensional aromaticity of the magic clusters Sn10Zn and Sn12Zn. Chem Phys 2011. [DOI: 10.1016/j.chemphys.2011.06.041] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Tai TB, Nguyen MT. A Stochastic Search for the Structures of Small Germanium Clusters and Their Anions: Enhanced Stability by Spherical Aromaticity of the Ge10 and Ge12(2-) Systems. J Chem Theory Comput 2011; 7:1119-30. [PMID: 26606360 DOI: 10.1021/ct1006482] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Investigations on germanium clusters in the neutral, anionic, and dianion states Gen(x) (n = 2-12 and x = 0, -1, -2) are performed using quantum chemical calculations with the B3LYP functional and the coupled-cluster singles and doubles [CCSD(T)] methods, in conjunction with the 6-311+G(d) basis set. An improved stochastic method is implemented for searching the low-lying isomers of clusters. Comparison of our results with previous reports on germanium clusters shows the efficiency of the search method. The Ge8 system is presented in detail. The anionic clusters Gen(-/2-) are studied theoretically and systematically for the first time, and their energetics are in good agreement with available experiments. The clusters Ge10, Ge10(2-), and Ge12(2-) are, in their ground state, characterized by large highest occupied molecular orbital-lowest unoccupied molecular orbital gaps, high vertical and adiabatic detachment energies, and substantial average binding energies. The enhanced stability of these magic clusters can consistently be rationalized using the jellium electron shell model and the spherical aromatic character.
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Affiliation(s)
- Truong Ba Tai
- Department of Chemistry, and LMCC-Mathematical Modeling and Computational Science Center, Katholieke Universiteit Leuven , B-3001 Leuven, Belgium
| | - Minh Tho Nguyen
- Department of Chemistry, and LMCC-Mathematical Modeling and Computational Science Center, Katholieke Universiteit Leuven , B-3001 Leuven, Belgium.,Institute for Computational Science and Technology , Thu Duc, Ho Chi Minh City, Vietnam
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Bundhun A, Abdallah HH, Ramasami P, Schaefer HF. Germylenes: Structures, Electron Affinities, and Singlet−Triplet Gaps of the Conventional XGeCY3 (X = H, F, Cl, Br, and I; Y = F and Cl) Species and the Unexpected Cyclic XGeCY3 (Y = Br and I) Systems. J Phys Chem A 2010; 114:13198-212. [DOI: 10.1021/jp1078955] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ashwini Bundhun
- Department of Chemistry, University of Mauritius, Réduit, Mauritius, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia, and Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Hassan H. Abdallah
- Department of Chemistry, University of Mauritius, Réduit, Mauritius, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia, and Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Ponnadurai Ramasami
- Department of Chemistry, University of Mauritius, Réduit, Mauritius, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia, and Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Henry F. Schaefer
- Department of Chemistry, University of Mauritius, Réduit, Mauritius, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia, and Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
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