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Kawabata S, Seki R, Watanabe T, Ohba T. Degradation of Graphene in High- and Low-Humidity Air, and Vacuum Conditions at 300-500 K. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:166. [PMID: 38251131 PMCID: PMC10820515 DOI: 10.3390/nano14020166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/05/2024] [Accepted: 01/10/2024] [Indexed: 01/23/2024]
Abstract
Graphene is a fundamental unit of carbon materials and, thus, primary sp2-bonded carbon material. Graphene is, however, easily broken macroscopically despite high mechanical strength, although its natural degradation has rarely been considered. In this work, we evaluate the natural degradation of two-layer graphene in vacuo, in low-humidity air, and in high-humidity air at 300, 400, 450, and 500 K. Over 1000 days of degradation at 300 K, the graphene structure was highly maintained in vacuo, whereas the layer number of graphene tended to decrease in high- and low-humidity air. Water was slightly reacted/chemisorbed on graphene to form surface oxygen groups at 300 K. At 450 and 500 K, graphene was moderately volatilized in vacuo and was obviously oxidized in high- and low-humidity air. Surprisingly, the oxidation of graphene was more suppressed in the high-humidity air than in the low-humidity air, indicating that water worked as an anti-oxidizer of graphene by preventing the chemisorption of oxygen on the graphene surface.
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Affiliation(s)
| | | | | | - Tomonori Ohba
- Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
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2
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Milon, Roy D, Ahmed F. A DFT study to investigate the physical, electrical, optical properties and thermodynamic functions of boron nanoclusters (M xB 2n0; x=1,2, n=3,4,5). Heliyon 2023; 9:e17886. [PMID: 37539100 PMCID: PMC10395302 DOI: 10.1016/j.heliyon.2023.e17886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 08/05/2023] Open
Abstract
First Principle DFT calculations employing the B3LYP/LanL2DZ/SDD level of theory were used to analyze the various characteristics of boron nanoclusters (B6, B8, and B10). These pure structures were further doped with four transition metals (Ta, Ti, Tc, and V) to examine the enhancement of the pure structures' structural, electrical, and optical features. To study structural stability, we have estimated cohesion energy and imaginary frequencies. Cohesion energies were entirely negative, with a range of -3.37 eV to -8.07 eV, and most constructions had no imaginary frequencies, indicating their structural occurrences. The calculated adsorption energy suggests that the order of stability of the pristine boron nanoclusters is B10>B8>B6, and TcB10 and Tc2B10 are the more stable structures. Mulliken charge, DOS, HOMO-LUMO, and the HOMO-LUMO gap have all been examined in-depth to provide insight into electrical characteristics. UV-Vis and CD measurements show the doped boron nanoclusters have excellent optical properties. Aside from calculating thermodynamic functions, we have also calculated the global DFT parameters, which give us a deep quantum mechanical understanding of the optimized structure for further research and applications in the field of science and technology.
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Affiliation(s)
- Milon
- Department of Physics, Comilla University, Cumilla 3506, Bangladesh
| | - Debashis Roy
- Department of Physics, Jashore University of Science and Technology, Jashore, 7408, Bangladesh
| | - Farid Ahmed
- Department of Physics, Jhangirnagar University, Savar, Dhaka 1342, Bangladesh
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3
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Racioppi S, Lolur P, Hyldgaard P, Rahm M. A Density Functional Theory for the Average Electron Energy. J Chem Theory Comput 2023; 19:799-807. [PMID: 36693279 PMCID: PMC9933435 DOI: 10.1021/acs.jctc.2c00899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A formally exact density functional theory (DFT) determination of the average electron energy is presented. Our theory, which is based on a different accounting of energy functional terms, partially solves one well-known downside of conventional Kohn-Sham (KS) DFT: that electronic energies have but tenuous connections to physical quantities. Calculated average electron energies are close to experimental ionization potentials (IPs) in one-electron systems, demonstrating a surprisingly small effect of self-interaction and other exchange-correlation errors in established DFT methods. Remarkable agreement with ab initio quantum mechanical calculations of multielectron systems is demonstrated using several flavors of DFT, and we argue for the use of the average electron energy as a design criterion for density functional approximations.
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Affiliation(s)
- Stefano Racioppi
- †Department
of Chemistry and Chemical Engineering, ‡Department of Microtechnology and
Nanoscience—MC2, Chalmers University
of Technology, Kemigården 4, Gothenburg, 41296, Sweden
| | - Phalgun Lolur
- †Department
of Chemistry and Chemical Engineering, ‡Department of Microtechnology and
Nanoscience—MC2, Chalmers University
of Technology, Kemigården 4, Gothenburg, 41296, Sweden
| | - Per Hyldgaard
- †Department
of Chemistry and Chemical Engineering, ‡Department of Microtechnology and
Nanoscience—MC2, Chalmers University
of Technology, Kemigården 4, Gothenburg, 41296, Sweden,
| | - Martin Rahm
- †Department
of Chemistry and Chemical Engineering, ‡Department of Microtechnology and
Nanoscience—MC2, Chalmers University
of Technology, Kemigården 4, Gothenburg, 41296, Sweden,
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4
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Computational study of the effects of static electric field on the interaction of 5-Fluorouracil anti-cancer drug with pristine and Sc- and Ti-doped B12P12 nanocage as drug delivery. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02486-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Rezaei-Sameti M, Iraji Borojeni Z. Interaction of 5-fluorouracil anticancer drug with nucleobases: insight from DFT, TD-DFT, and AIM calculations. J Biomol Struct Dyn 2022:1-12. [PMID: 35866624 DOI: 10.1080/07391102.2022.2099976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
In this study, the interaction of 5-fluorouracil (5FU) drug with adenine (A), guanine(G), cytosine(C), uracil (U), and thymine (T) nucleobases of DNA and RNA are surveyed at the ωB97XD/LANL2DZ, M06-2X/6-31G (d, p), MPW1PWQ1/6-31G(d, p), PBEPBE/6-31(d, p) and ωB97XD/6-31G(d, p) levels of density functional theory (DFT). The considered complexes of 5FU drug with nucleobases are optimized at the above level of theories. Max Force and RMS of optimization criteria are 0.00035 (Ha), and 0.0003 respectively. From optimized structures, the adsorption energy, thermodynamic parameters in gas and solvent media, quantum theory atom in molecule (QTAIM), electron localized function (ELF), and reduced density gradient (RDG) are calculated at ωB97XD/LANL2DZ and M06-2X/6-31G (d, p) level of DFT theory. The QTAIM, ELF, and RDG results confirm that the nature of bonding between 5FU drug with A, C, G, U, and T nucleobases is electrostatic or hydrogen bond type. The adsorption and thermodynamic energy results demonstrate that the interaction of the 5FU drug with C and G nucleobases is stronger than other nucleobases. The results of this study can be suggested the mechanism of interaction of the 5FU drug with nucleobases of DNA and RNA.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mahdi Rezaei-Sameti
- Department of Applied Chemistry, Faculty of Science, Malayer University, Malayer, Iran
| | - Zohre Iraji Borojeni
- Department of Applied Chemistry, Faculty of Science, Malayer University, Malayer, Iran
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6
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Denis PA. New insights into the covalent functionalization of black and blue phosphorene. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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7
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Ahmad Bhatti I, Mohsin M, Amjad N, Shehzad RA, Ayub K, Iqbal J, Taha TA. Enhancement of NLO properties of supersalt (Al(BH 4) 3)-doped graphene: a DFT study. J Mol Model 2022; 28:164. [PMID: 35606607 DOI: 10.1007/s00894-022-05141-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 05/02/2022] [Indexed: 11/27/2022]
Abstract
In this work, pure and supersalt-doped graphene is evaluated by the density functional theory (DFT) to explore its optical and electronic properties. The doping of supersalt Al(BH4)3 on graphene reduces the highest occupied molecular orbital and lower unoccupied molecular orbital (HOMO-LUMO) bandgap of graphene@Al(BH4)3 and graphene@2Al(BH4)3 to 3.57 and 3.55 eV from 3.61 eV. The improvement in the optoelectronic properties of the supersalt Al(BH4)3-doped graphene is determined by the upshift of UV absorption peak and dipole moment. Polarizability (α) values of graphene@Al(BH4)3, and graphene@2Al(BH4)3 increase to 14% and 26% in the comparison of pure graphene. The first hyperpolarizability (βo) is increased from 0.44 (graphene) to 1295.4 au in graphene@2Al(BH4)3. Our findings suggest that Al(BH4)3-doped graphene could be an effective method for making graphene an efficient nonlinear optical material.
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Affiliation(s)
- Ijaz Ahmad Bhatti
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan.
| | - Muhammad Mohsin
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Nyla Amjad
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Rao Aqil Shehzad
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Khurshid Ayub
- Department of Chemistry, COMSAT University, Abbottabad Campus, Abbottabad, 22060, KPK, Pakistan
| | - Javed Iqbal
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan.
- Punjab Bio-Energy Institute, University of Agriculture, Faisalabad, 38000, Pakistan.
| | - T A Taha
- Physics Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia
- Physics and Engineering Mathematics Department, Faculty of Electronic Engineering, Menoufia University, Menouf, 32952, Egypt
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8
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The effects of Cu, Zn doped, and static electrical field on the interaction of mercaptopyridine drug with B12P12 nanocage: Insight from DFT, TD-DFT. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Milon, Hossain MK, Roy D, Ahmed F. Boron nanocluster as a heavy metal adsorbent in aqueous environment: A DFT Study. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Chen T, An L, Jia X. A DFT-based analysis of adsorption properties of fluoride anion on intrinsic, B-doped, and Al-doped graphene. J Mol Model 2021; 27:56. [PMID: 33515078 DOI: 10.1007/s00894-021-04683-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 01/19/2021] [Indexed: 11/29/2022]
Abstract
Fluorine emission from domestic wastewater is a major cause of severe environmental issues. In this paper, the density functional theory has been used to reveal the adsorption properties of F- ions and HF molecules on intrinsic graphene, B-doped graphene, and Al-doped graphene. Throughout the analysis of band structure, geometric structure, adsorption energy, charge transfer, charge density, density of states, and frontier orbital, we can find that the adsorption of F- ions and HF molecules on intrinsic graphene and HF molecules on B-doped graphene is weak, and it is only physical adsorption. When F- ions and HF molecules are adsorbed on Al-doped graphene and F- ions adsorbed on B-doped graphene, the adsorption energy, charge transfer, and charge density greatly increase, and the adsorption distance significantly decreases, and there exist obvious hybridizations by analyzing the charge density and density of states. We can also find that Al-doped graphene is more sensitive to F- ions after comparing the variation of band gap. The work conducted in this research provides a theoretical guidance for the application of fluorine sensors based on graphene.
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Affiliation(s)
- Tao Chen
- College of Mechanical Engineering, North China University of Science and Technology, Tangshan, 063210, China
| | - Libao An
- College of Mechanical Engineering, North China University of Science and Technology, Tangshan, 063210, China.
| | - Xiaotong Jia
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
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11
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Liu B, Aquino AJA, Nachtigallová D, Lischka H. Doping Capabilities of Fluorine on the UV Absorption and Emission Spectra of Pyrene-Based Graphene Quantum Dots. J Phys Chem A 2020; 124:10954-10966. [PMID: 33325716 DOI: 10.1021/acs.jpca.0c08694] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Functionalization of quantum carbon dots (QCDs) and graphene quantum dots (GQDs) is a popular way to tune their optical spectra increasing their potential applicability in material science and biorelated disciplines. Based on the experimental observation, functionalization by fluorine atoms induces substantial shifts in absorption and emission spectra and an intensity increase. Understanding of the effects due to fluorine functionalization at the atomic scale level is still challenging due to the complex structure of fluorinated QCDs. In this work, the effect of covalent edge-fluorination and fluorine anion doping on absorption and emission spectra of prototypical polycyclic aromatic hydrocarbons pyrene and circum-pyrene has been investigated. The ways to achieve efficient red-shifts in the UV spectra and obtaining reasonable intensities stood in the focus of the work. High-level quantum chemical methods based on density functional theory/multireference configuration interaction (DFT/MRCI) and single-reference second-order algebraic diagrammatic construction (ADC(2)) and density functional theory (DFT) using the CAM-B3LYP functional have been used for this purpose. The calculations show that doping with the fluoride anion can have significant effects on the electronic spectrum. However, the effect of the fluoride ion is strongly dependent on its position with respect to the QCD. The localization above the GQDs causes large red-shifts to both the absorption and emission of spectra of GQDs, while in-plane localization leads to only negligible shifts and a tendency to dissociation after electronic excitation. Thus, large red-shifts, observed in complexes with F-, are obtained due to the introduction of new excited states with large CT character not yet been considered previously in this context, although they have the potential to significantly influence the photophysics of quantum dots. Doping by edge fluorination redshifts the spectra only slightly. This study provides insights on fluorine-doped GQDs, which is conducive to promoting its rational design and controllable synthesis.
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Affiliation(s)
- Bo Liu
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Adelia J A Aquino
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China.,Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Dana Nachtigallová
- Regional Centre of Advanced Technologies and Materials, Palacky' University, 78371 Olomouc, Czech Republic.,Institute of Organic Chemistry and Biochemistry v.v.i., The Czech Academy of Sciences, Flemingovo na'm. 2, 16610 Prague 6, Czech Republic
| | - Hans Lischka
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China.,Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
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12
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Shamim SUD, Hussain T, Hossian MR, Hossain MK, Ahmed F, Ferdous T, Hossain MA. A DFT study on the geometrical structures, electronic, and spectroscopic properties of inverse sandwich monocyclic boron nanoclusters ConBm (n = 1.2; m = 6–8). J Mol Model 2020; 26:153. [PMID: 32451624 DOI: 10.1007/s00894-020-04419-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 05/11/2020] [Indexed: 12/01/2022]
Affiliation(s)
- Siraj Ud Daula Shamim
- Department of Physics, Mawlana Bhashani Science and Technology University, Tangail, 1902, Bangladesh
| | - Tashrifa Hussain
- Department of Physics, Jahangirnagar University, Dhaka, Bangladesh
| | - Md Rakib Hossian
- Department of Physics, Bangabandhu Sheikh Mujibur Rahman Science & Technology University, Gopalganj, 8100, Bangladesh
| | - Md Kamal Hossain
- Department of Physics, Jahangirnagar University, Dhaka, Bangladesh.
| | - Farid Ahmed
- Department of Physics, Jahangirnagar University, Dhaka, Bangladesh
| | - Tahmina Ferdous
- Department of Physics, Jahangirnagar University, Dhaka, Bangladesh
| | - Md Abul Hossain
- Department of Physics, Jahangirnagar University, Dhaka, Bangladesh
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13
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Denis PA, Ullah S, Iribarne F. Reduction chemistry of hexagonal boron nitride sheets and graphene: a comparative study on the effect of alkali atom doping on their chemical reactivity. NEW J CHEM 2020. [DOI: 10.1039/d0nj00414f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalization of 2D BN dramatically increases the charge donated by lithium and 2D BN is no longer inert!
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Affiliation(s)
- Pablo A. Denis
- Computational Nanotechnology
- DETEMA
- Facultad de Química
- UDELAR
- CC 1157
| | - Saif Ullah
- Departamento de Física
- Instituto de Ciências Exatas
- Campus Universitário
- Universidade Federal de Juiz de Fora
- Juiz de Fora
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14
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The thermodynamic, quantum, AIM and NBO study of the interaction of pyrazinamide drug with the pristine and transition metal-doped B12P12. ADSORPTION 2019. [DOI: 10.1007/s10450-019-00181-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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15
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Hutama AS, Huang H, Kurniawan YS. Investigation of the chemical and optical properties of halogen-substituted N-methyl-4-piperidone curcumin analogs by density functional theory calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 221:117152. [PMID: 31158756 DOI: 10.1016/j.saa.2019.117152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 05/09/2019] [Accepted: 05/21/2019] [Indexed: 06/09/2023]
Abstract
Halogen-substituted N-methyl-4-piperidone curcumin analog compounds were studied for their molecular structure, molecular vibration analysis, natural bond orbital, ultraviolet spectra, molecular reactivity analysis, and nonlinear optical properties. The molecules in interest were the (3E,5E)-3,5-dibenzylidene-1-methylpiperidin-4-one along with its substituted halogen (X = F- or Cl- or Br-) at the ortho, meta and para position in the phenyl ring. The calculated geometrical parameters at B3LYP/6-311++G(d,p) were in good agreement with the available experimental XRD data. Using the frequency calculations, the molecular vibrational modes have been analyzed. Meanwhile, the hyperconjugative stabilization energies have been calculated using NBO analysis to address the donor and acceptor in the hyperconjugation. The calculated UV spectra at TD-CAM-B3LYP/6-311++G(d,p) show strong absorption around 300 to 320 nm which corresponds to the absorption in the UV-A and UV-B region. From molecular electrostatic potential surface, CO moiety is one of the electronegative regions in the compounds where the CX moiety is the other electronegative region of the compounds. Fluoro-substituted compounds are the compounds with the most electronegativity while bromo-substituted compounds are the compounds with the least electronegativity. Calculations of average local ionization energy surfaces have been performed to obtain information related to the local reactivity of the molecules where the phenyl becomes less reactive after the substitution. The calculated first hyperpolarizability is 6 to 17 times larger than urea, the standard nonlinear optic material. These findings imply that all of the molecules considered have potential to be applied as active sunscreen material or nonlinear optic material.
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Affiliation(s)
- Aulia Sukma Hutama
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Indonesia; Austrian-Indonesian Center for Computational Chemistry, Universitas Gadjah Mada, Indonesia.
| | - Hendra Huang
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Indonesia
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16
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Denis PA, Iribarne F. Comparative study of the chemical reactivity of graphene and boron nitride sheets. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.112538] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Interaction of isoniazid drug with the pristine and Ni-doped of (4, 4) armchair GaNNTs: a first principle study. J INCL PHENOM MACRO 2017. [DOI: 10.1007/s10847-017-0720-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Rezaei-Sameti M, Zanganeh F. A computational study of adsorption H2S gas on the surface of the pristine, Al&P-doped armchair and zigzag BNNTs. J Sulphur Chem 2017. [DOI: 10.1080/17415993.2017.1313255] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Mahdi Rezaei-Sameti
- Department of Applied Chemistry, Faculty of Science, Malayer University, Malayer, Iran
| | - Fatemeh Zanganeh
- Department of Applied Chemistry, Faculty of Science, Malayer University, Malayer, Iran
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19
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Interaction of a Ti-doped semi-fullerene (TiC30) with molecules of CO and CO2. J Mol Model 2016; 22:223. [DOI: 10.1007/s00894-016-3086-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 08/05/2016] [Indexed: 10/21/2022]
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20
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Kohut SV, Cuevas-Saavedra R, Staroverov VN. Generalized average local ionization energy and its representations in terms of Dyson and energy orbitals. J Chem Phys 2016; 145:074113. [DOI: 10.1063/1.4961071] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Andrić JM, Misini-Ignjatović MZ, Murray JS, Politzer P, Zarić SD. Hydrogen Bonding between Metal-Ion Complexes and Noncoordinated Water: Electrostatic Potentials and Interaction Energies. Chemphyschem 2016; 17:2035-42. [PMID: 26989883 DOI: 10.1002/cphc.201501200] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Indexed: 12/28/2022]
Abstract
The hydrogen bonding of noncoordinated water molecules to each other and to water molecules that are coordinated to metal-ion complexes has been investigated by means of a search of the Cambridge Structural Database (CSD) and through quantum chemical calculations. Tetrahedral and octahedral complexes that were both charged and neutral were studied. A general conclusion is that hydrogen bonds between noncoordinated water and coordinated water are much stronger than those between noncoordinated waters, whereas hydrogen bonds of water molecule in tetrahedral complexes are stronger than in octahedral complexes. We examined the possibility of correlating the computed interaction energies with the most positive electrostatic potentials on the interacting hydrogen atoms prior to interaction and obtained very good correlation. This study illustrates the fact that electrostatic potentials computed for ground-state molecules, prior to interaction, can provide considerable insight into the interactions.
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Affiliation(s)
- Jelena M Andrić
- Innovation Center of the Department of Chemistry, Studentski trg 12-16, 11000, Belgrade, Serbia
| | | | - Jane S Murray
- Department of Chemistry, University of New Orleans, New Orleans, LA, 71048, USA
| | - Peter Politzer
- Department of Chemistry, University of New Orleans, New Orleans, LA, 71048, USA
| | - Snežana D Zarić
- Department of Chemistry, Texas A & M University at Qatar, P.O. Box 23874, Doha, Qatar. .,Department of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia.
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22
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Muñiz J, Cuentas-Gallegos AK, Robles M, Valdéz M. Bond formation, electronic structure, and energy storage properties on polyoxometalate–carbon nanocomposites. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1855-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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How lithium atoms affect the first hyperpolarizability of BN edge-doped graphene. J Mol Model 2016; 22:27. [PMID: 26748924 DOI: 10.1007/s00894-015-2899-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 12/22/2015] [Indexed: 10/22/2022]
Abstract
How do lithium atoms affect the first hyperpolarizability (β0) of boron-nitrogen (BN) edge-doped graphene. In this work, using pentacene as graphene model, Lin@BN-1 edge-doped pentacene and Lin@BN-2 edge-doped pentacene (n = 1, 5) were designed to study this problem. First, two models (BN-1 edge-doped pentacene, and BN-2 edge-doped pentacene ) were formed by doping the BN into the pentacene with different order, and then Li@BN-1 edge-doped pentacene and Li@ BN-2 edge-doped pentacene were obtained by substituting the H atom in BN edge-doped pentacene with a Li atom. The results show that the first hyperpolarizabilities of BN-1 edge-doped pentacene and Li@BN-1 edge-doped pentacene were 4059 a.u. and 6249 a.u., respectively; the first hyperpolarizabilities of BN-2 edge-doped pentacene and Li@BN-2 edge-doped pentacene were 2491 a.u. and 4265 a.u., respectively. The results indicate that the effect of Li substitution is to greatly increase the β0 value. To further enhance the first hyperpolarizability, Li5@ BN-1 edge-doped pentacene and Li5@BN-2 edge-doped pentacene were designed, and were found to exhibit considerably larger first hyperpolarizabilities (β0) (12,112 a.u. and 7921a.u., respectively). This work may inspire further study of the nonlinear properties of BN edge-doped graphene.
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Zhang X, Gong X. DFT, QTAIM, and NBO investigations of the ability of the Fe or Ni doped CNT to absorb and sense CO and NO. J Mol Model 2015; 21:225. [PMID: 26254940 DOI: 10.1007/s00894-015-2778-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 07/28/2015] [Indexed: 12/30/2022]
Abstract
The structures and intramolecular interactions of complexes (FeCNT-CO, FeCNT-NO, NiCNT-CO, and NiCNT-NO) formed by the Fe or Ni doped single-wall carbon nanotube (FeCNT or NiCNT) and gas CO or NO were studied using density functional theory, quantum theory of atom in molecule (QTAIM), and natural bond orbital methods. The adsorption processes of CO and NO on surfaces of FeCNT and NiCNT are chemisorption, energetically favored, exothermic, and spontaneous. High temperature is not good for adsorption. Introducing NO more obviously elongates the distances between Fe/Ni and C atoms and decreases ∠CFe(Ni)C than adding CO. QTAIM analysis shows that the covalent bonding interactions of FeCNT-NO (NiCNT-NO) are stronger than that of FeCNT-CO (NiCNT-CO). NO plays a role of electron acceptor while CO is electron donator in complexes. Electrostatic interaction of FeCNT-NO (NiCNT-NO) is stronger than that of FeCNT-CO (NiCNT-CO). The stronger intramolecular interactions of FeCNT-NO and NiCNT-NO reveal that FeCNT and NiCNT are more effective to adsorb and sense NO than CO. CO and NO considerably change the electronic properties of FeCNT and NiCNT, which is useful for designing sensors for CO and NO.
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Affiliation(s)
- Xueli Zhang
- Department of Chemistry, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
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Borpuzari MP, Guha AK, Kar R. Structural, electronic and reactivity studies on group 15 analogues of N-heterocyclic carbene. Struct Chem 2015. [DOI: 10.1007/s11224-014-0552-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Yadav A, Mishra P. Functionalisation of graphene by edge-halogenation and radical addition using polycyclic aromatic hydrocarbon models: edge electron density-binding energy relationship. Mol Phys 2014. [DOI: 10.1080/00268976.2014.974700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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Cortés-Arriagada D, Gutiérrez-Oliva S, Herrera B, Soto K, Toro-Labbé A. The mechanism of chemisorption of hydrogen atom on graphene: Insights from the reaction force and reaction electronic flux. J Chem Phys 2014; 141:134701. [DOI: 10.1063/1.4896611] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Esrafili MD, Nurazar R. A theoretical study on surface reactivity of fluorinated (n,0) and (n,n) carbon nanotubes (n = 3–6). CAN J CHEM 2014. [DOI: 10.1139/cjc-2013-0553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Density functional theory calculations are performed to investigate the surface reactivity of pristine as well as fluorine-terminated zigzag (n,0) and armchair (n,n) carbon nanotubes (n = 3–6). The properties determined include the electrostatic potential V(r) and average local ionization energy Ī(r) on the surfaces of the investigated tubes. A general feature of all of the systems studied is that stronger potentials are associated with regions of higher curvature. The results indicate that both V(r) and Ī(r) detect the effects of fluorine-terminated regions in which significant effects are observed for those atoms in the vicinity of the fluorine-terminated regions. Comparison with the Ī(r) of the pristine nanotube indicates correctly that in the fluorine-terminated models, the fluorine atoms tend to deactivate the surface toward electrophilic/radical attack.
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Affiliation(s)
- Mehdi D. Esrafili
- Laboratory of Theoretical Chemistry, Department of Chemistry, University of Maragheh, Maragheh, Iran
| | - Roghaye Nurazar
- Laboratory of Theoretical Chemistry, Department of Chemistry, University of Maragheh, Maragheh, Iran
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Vijaya Sundar J, Subramanian V. Novel Chemistry for the Selective Oxidation of Benzyl Alcohol by Graphene Oxide and N-Doped Graphene. Org Lett 2013; 15:5920-3. [DOI: 10.1021/ol402958h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- J. Vijaya Sundar
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India
| | - V. Subramanian
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India
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Yadav A, Mishra PC. Polyradicals of polycyclic aromatic hydrocarbons as finite size models of graphene: highly open-shell nature, symmetry breaking, and enhanced-edge electron density. J Phys Chem A 2013; 117:8958-68. [PMID: 23941534 DOI: 10.1021/jp4058719] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Properties of polyradicals (all CH bonds dissociated) of benzene and certain polycyclic aromatic hydrocarbons (PAHs) were studied. The occurrence of symmetry breaking is revealed in going from benzene and the PAHs to their polyradicals. Polyradicals would serve as finite size models of graphene with unpassivated edges in a more realistic way than the PAHs. Monoradicals (one CH bond dissociated) of benzene and all of the PAHs and higher radicals of benzene and one PAH (two to all CH bonds successively dissociated) were also investigated. Reliability of the methodology employed was ascertained by a comparison of our calculated single CH bond dissociation energy of benzene with the available previous experimental and theoretical results. Besides ground-state geometries, the aspects studied include single and successive CH bond dissociation energies, and electron density, molecular electrostatic potential (MEP), and spin density distributions. All of the monoradicals studied were found to have doublet spin multiplicity, while polyradicals with 4 to 16 rings and zigzag or mixed-type edges were found to have spin multiplicities varying from triplet to 11et. Bond lengths and bond angles of rings located at the edges are appreciably modified in going from PAHs to polyradicals. Electron density and spin density are found to be enhanced at the edges of monoradicals and polyradicals of PAHs, as found previously for PAHs. However, MEP maps of polyradicals have significantly different features from those of monoradicals and PAHs, which has a significant implication.
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Affiliation(s)
- Amarjeet Yadav
- Department of Physics, Banaras Hindu University , Varanasi - 221 005, Uttar Pradesh, India
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Bundhun A, Ramdany MD, Murray JS, Ramasami P. Density functional theory study of Te(CN)2, Te(CN)(NC), and Te(NC)2 and their isomerizations. Struct Chem 2013. [DOI: 10.1007/s11224-013-0304-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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32
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Yadav A, Mishra P. Dimers and trimers of polycyclic aromatic hydrocarbons as models of graphene bilayers and trilayers: enhanced electron density at the edges. Mol Phys 2013. [DOI: 10.1080/00268976.2013.800918] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Estrada E, Benzi M. Atomic displacements due to spin–spin repulsion in conjugated alternant hydrocarbons. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.03.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Liu B, Sun H, Peng T, Ji G. Molecular vibrational spectroscopy characterization of epoxy graphene oxide from density functional calculations. J Mol Model 2012; 19:1429-34. [PMID: 23224942 DOI: 10.1007/s00894-012-1701-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 11/19/2012] [Indexed: 11/28/2022]
Abstract
To further understand the structure of graphene oxide, several structures of graphene oxide were systematically investigated using density functional theory (DFT). Our models consisted of a hexagonal in-plane structure of graphene with epoxy groups, and different oxidation levels. We found that different arrangements of these units yielded a range of vibrational spectra. Raman positions of the D and G bands depend sensitively on the local atomic configurations. Both structure energy and spectra computations indicate that the oxidation functional groups are energetically favorable to aggregate together and to be close to one another on the opposite side of graphene surface.
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Affiliation(s)
- Bo Liu
- Department of Science, Southwest University of Science and Technology, Mianyang 621010 Sichuan Province, People's Republic of China
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The average local ionization energy as a tool for identifying reactive sites on defect-containing model graphene systems. J Mol Model 2012. [DOI: 10.1007/s00894-012-1693-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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