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De Souza LA, Almeida ER, Belchior JC, Dos Santos HF, De Almeida WB. Cisplatin release from inclusion complex formed by oxidized carbon nanotube: A DFT study. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138619] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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De Souza LA, Almeida ER, Cunha e Silva JH, Paschoal DFS, Belchior JC, Dos Santos HF, De Almeida WB. 1H and 195Pt NMR prediction for inclusion compounds formed by cisplatin and oxidized carbon nanostructures. RSC Adv 2021; 11:599-611. [PMID: 35423010 PMCID: PMC8691003 DOI: 10.1039/d0ra06044e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 11/29/2020] [Indexed: 01/07/2023] Open
Abstract
Prediction of NMR chemical shifts can assist experimentalists in the characterization of drug delivery systems based on carbon nanocomposites. Chemical shifts are strongly correlated to the nucleus position and its chemical neighborhood. Therefore, to predict structures and NMR properties of complex chemical models, choosing a more consistent theoretical level capable of providing more realistic results and moderate computational demand is a major challenge. In this work, we predicted the NMR spectra of inclusion compounds formed by cisplatin (cDDP) and an oxidized carbon nanotube (CNTox) and nanocone (CNCox) considered by specialists as potential drug delivery systems. The 195Pt NMR chemical shifts calculated at the DFT level with the new relativistic NMR-DKH basis set were −2314 ppm and −2192 ppm for cDDP@CNTox and cDDP@CNCox complexes, respectively, which are both high-field shifted relative to the free cDDP (−2110 ppm). 1H NMR chemical shifts are also sensitive to the inclusion process. The H (NH3) signals are found on average at +4.3 (cDDP), −5.1 (cDDP@CNTox) and +6.6 ppm (cDDP@CNCox). Interestingly, despite the similar inclusion modes in CNTox and CNCox cavities, the 1H NMR shifts were in opposite directions. A possible reason might be the higher stability of cDDP@CNTox (ΔEF = −19.9 kcal mol−1) than that of cDDP@CNCox (ΔEF = −5.7 kcal mol−1), which suggests a short guest–host contact in the former and consequently, a more efficient shielding of hydrogen atoms due to the electron-rich carbon structure. These results may be helpful as comparison data in the NMR spectra assignment in solution and the inclusion compounds' structural elucidation. 195Pt NMR chemical shifts of the cisplatin molecule in the inclusion complex formed by oxidized carbon nanotubes.![]()
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Affiliation(s)
- Leonardo A. De Souza
- Departamento de Química
- ICEx, Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | - Eduardo R. Almeida
- Núcleo de Estudos em Química Computacional (NEQC)
- Departamento de Química
- ICE, Universidade Federal de Juiz de Fora
- Juiz de Fora
- Brazil
| | - Joyce H. Cunha e Silva
- Núcleo de Química Teórica e Computacional de Macaé (NQTCM), Polo Ajuda
- Universidade Federal do Rio de Janeiro
- Macaé
- Brazil
| | - Diego F. S. Paschoal
- Núcleo de Química Teórica e Computacional de Macaé (NQTCM), Polo Ajuda
- Universidade Federal do Rio de Janeiro
- Macaé
- Brazil
| | - Jadson C. Belchior
- Departamento de Química
- ICEx, Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | - Hélio F. Dos Santos
- Núcleo de Estudos em Química Computacional (NEQC)
- Departamento de Química
- ICE, Universidade Federal de Juiz de Fora
- Juiz de Fora
- Brazil
| | - Wagner B. De Almeida
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense
- Niterói
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Silva FT, Rocha-Santos A, Firme CL, De Souza LA, Anjos IC, Belchior JC. Application of a quantum genetic algorithm and QTAIM analysis in the study of structural and electronic properties of neutral bimetallic clusters Na xLi y (4 ≤ x + y ≤ 10). J Mol Model 2020; 26:317. [PMID: 33098445 DOI: 10.1007/s00894-020-04576-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 10/15/2020] [Indexed: 11/27/2022]
Abstract
Alloy clusters of NaxLiy (4 ≤ x + y ≤ 10) are studied by exploring the potential energy surface in the ab initio MP2 level with the support of a quantum genetic algorithm (QGA). In some cases, the structures have been also refined with DFT and coupled-cluster methods. The general trends of sodium-lithium structures are in line with previous studies. The ionization potentials and polarizabilities to all structures were calculated with MP2 method and the average error between these two properties compared with experimental data was 6% and 13%, respectively. The topological analysis based on quantum theory of atoms in molecules (QTAIM) showed that by increasing the cluster size of the diatomic system there was a decrease of atomic interaction energies. The degree of degeneracy from D3BIA aromaticity index and the analysis of the atomic charges showed the influence (by charge transfer) of the chemical element in lower quantity in the cluster with respect to the other atoms. Our achievements of comparing our theoretical results with available experimental data have demonstrated that our approach can also predict satisfactorily quantum atomic and alloy clusters properties, at least, for low nuclearities.
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Affiliation(s)
- Frederico Teixeira Silva
- Fundamental Chemistry Department, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235, Cidade Universitária, Recife, Pernambuco, 50.670-901, Brazil
| | - Acassio Rocha-Santos
- Chemistry Department, Universidade Federal da Paraíba, Jardim Universitário s/n, Castelo Branco, João Pessoa, Paraíba, 58.051-900, Brazil
| | - Caio L Firme
- Chemistry Institute, Universidade Federal do Rio Grande do Norte, Av. Senador Salgado Filho, 3000, Lagoa Nova, Natal, Rio Grande do Norte, 59.072-970, Brazil
| | - Leonardo A De Souza
- Chemistry Department, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais, 31.270-901, Brazil
| | - Italo C Anjos
- Chemistry Department, Universidade Federal de Mato Grosso, Av. Fernando Corrêa da Costa, 2367, Boa Esperança, Cuiabá, Mato Grosso, 78.068-600, Brazil
| | - Jadson C Belchior
- Chemistry Department, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais, 31.270-901, Brazil.
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Buckypapers of carbon nanotubes and cellulose nanofibrils: Foldable and flexible electrodes for redox supercapacitors. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136241] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Molecular Interpretation of Pharmaceuticals’ Adsorption on Carbon Nanomaterials: Theory Meets Experiments. Processes (Basel) 2020. [DOI: 10.3390/pr8060642] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The ability of carbon-based nanomaterials (CNM) to interact with a variety of pharmaceutical drugs can be exploited in many applications. In particular, they have been studied both as carriers for in vivo drug delivery and as sorbents for the treatment of water polluted by pharmaceuticals. In recent years, the large number of experimental studies was also assisted by computational work as a tool to provide understanding at molecular level of structural and thermodynamic aspects of adsorption processes. Quantum mechanical methods, especially based on density functional theory (DFT) and classical molecular dynamics (MD) simulations were mainly applied to study adsorption/release of various drugs. This review aims to compare results obtained by theory and experiments, focusing on the adsorption of three classes of compounds: (i) simple organic model molecules; (ii) antimicrobials; (iii) cytostatics. Generally, a good agreement between experimental data (e.g. energies of adsorption, spectroscopic properties, adsorption isotherms, type of interactions, emerged from this review) and theoretical results can be reached, provided that a selection of the correct level of theory is performed. Computational studies are shown to be a valuable tool for investigating such systems and ultimately provide useful insights to guide CNMs materials development and design.
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Kuganathan N, Chroneos A. Encapsulation of cadmium telluride nanocrystals within single walled carbon nanotubes. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.01.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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De Souza LA, Da Silva HC, De Almeida WB. Structural Determination of Antioxidant and Anticancer Flavonoid Rutin in Solution through DFT Calculations of 1H NMR Chemical Shifts. ChemistryOpen 2018; 7:902-913. [PMID: 30460171 PMCID: PMC6234759 DOI: 10.1002/open.201800209] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Indexed: 11/28/2022] Open
Abstract
As the knowledge of the predominant molecular structure of antioxidant and anticancer flavonoid rutin in solution is very important for understanding the mechanism of action, a quantum chemical investigation of plausible rutin structures including solvent effects is of relevance. In this work, DFT calculations were performed to find possible minimum energy structures for the rutin molecule. 1H NMR chemical shift DFT calculations were carried out in DMSO solution using the polarizable continuum model (PCM) to simulate the solvent effect. Analysis of the experimental and theoretical 1H NMR chemical shift profiles offers a powerful fingerprint criterion to determine the predominant molecular structure in solution. Therefore, our aim is to find the best match between experimental (in DMSO‐d) and theoretical (PCM–DMSO) 1H NMR spectrum profiles. Among 34 optimized structures located on the potential energy surface, we found that structure 32, with a B‐ring deviated 30° from a planar configuration (geometry usually assumed for polyphenols), showed an almost perfect agreement with experimental the 1H NMR pattern when compared to the corresponding fully optimized planar geometry. This structure is also predicted as the global minimum based on room‐temperature Gibbs free energy calculations in solution and, therefore, should be experimentally observed. This is new and valuable structural information regarding structure–activity relationship studies, and such information is hard to obtain by experimentalists without the aid of the X‐ray diffraction technique.
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Affiliation(s)
- Leonardo A. De Souza
- Departamento de Química InorgânicaInstituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho24020-141, CentroNiteróiRJBrazil
| | - Haroldo C. Da Silva
- Departamento de Química InorgânicaInstituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho24020-141, CentroNiteróiRJBrazil
| | - Wagner B. De Almeida
- Departamento de Química InorgânicaInstituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho24020-141, CentroNiteróiRJBrazil
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Cisplatin Loaded Multiwalled Carbon Nanotubes Induce Resistance in Triple Negative Breast Cancer Cells. Pharmaceutics 2018; 10:pharmaceutics10040228. [PMID: 30428555 PMCID: PMC6321179 DOI: 10.3390/pharmaceutics10040228] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/27/2018] [Accepted: 11/09/2018] [Indexed: 12/12/2022] Open
Abstract
In this paper we developed a method for multiwalled carbon nanotubes (MWCNTs) use as carriers for a drug based on platinum in breast cancer therapy. The method of functionalization involves the carboxyl functionalization of nanotubes and encapsulation of cisplatin (CDDP) into MWCNTs. The biological properties of MWCNTs loaded with CDDP (MWCNT-COOH-CDDP) and of individual components MWCNT-COOH and free CDDP were evaluated on MDA-MB-231 cells. Various concentrations of CDDP (0.316–2.52 µg/mL) and MWCNTs (0.5–4 µg/mL) were applied on cells for 24 and 48 h. Only at high doses of CDDP (1.26 and 2.52 µg/mL) and MWCNT-COOH-CDDP (2 and 4 µg/mL) cell morphological changes were observed. The cellular viability decreased only with approx. 40% after 48 h of exposure to 2.52 µg/mL CDDP and 4 µg/mL MWCNT-COOH-CDDP despite the high reactive oxygen species (ROS) production induced by MWCNTs starting with 24 h. After 48 h, ROS level dropped as a result of the antioxidant defence activation. We also found a significant decrease of caspase-3 and p53 expression after 48 h, accompanied by a down-regulation of NF-κB in cells exposed to MWCNT-COOH-CDDP system which promotes apoptosis escape and thus failing to overcome the triple negative breast cancer (TNBC) cells resistance.
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De Freitas LV, Dos Santos ALDS, Da Costa FC, Calixto JB, Miranda PVP, Silva TJ, Pereira ES, Rocha WR, De Almeida WB, De Souza LA, Freitas MC. Synthesis and structural characterization of a 8-hydroxyquinoline derivative coordinated to Zn(II). J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.05.050] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Cuevas-Flores MDR, Garcia-Revilla MA, Bartolomei M. Noncovalent interactions between cisplatin and graphene prototypes. J Comput Chem 2018; 39:71-80. [PMID: 28833256 DOI: 10.1002/jcc.24920] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 07/13/2017] [Accepted: 08/06/2017] [Indexed: 01/18/2023]
Abstract
Cisplatin (CP) has been widely used as an anticancer drug for more than 30 years despite severe side effects due to its low bioavailability and poor specificity. For this reason, it is paramount to study and design novel nanomaterials to be used as vectors capable to effectively deliver the drug to the biological target. The CP square-planar geometry, together with its low water solubility, suggests that it could be possibly easily adsorbed on 2D graphene nanostructures through the interaction with the related highly conjugated π-electron system. In this work, pyrene has been first selected as the minimum approximation to the graphene plane, which allows to properly study the noncovalent interactions determining the CP adsorption. In particular, electronic structure calculations at the MP2C and DFT-SAPT levels of theory have allowed to obtain benchmark interaction energies for some limiting configurations of the CP-pyrene complex, as well as to assess the role of the different contributions to the total interaction: it has been found that the parallel configurations of the aggregate are mainly stabilized around the minimum region by dispersion, in a similar way as for complexes bonded through π-π interactions. Then, the benchmark interaction energies have been used to test corresponding estimations obtained within the less expensive DFT to validate an optimal exchange-correlation functional which includes corrections to take properly into account for the dispersion contribution. Reliable DFT interaction energies have been therefore obtained for CP adsorbed on graphene prototypes of increasing size, ranging from coronene, ovalene, and up to C150 H30 . Finally, DFT geometry optimizations and frequency calculations have also allowed a reliable estimation of the adsorption enthalpy of CP on graphene, which is found particularly favorable (about -20 kcal/mol at 298 K and 1 bar) being twice that estimated for the corresponding benzene adsorption. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Ma Del Refugio Cuevas-Flores
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta S/N, 36050, Guanajuato, México
| | - Marco Antonio Garcia-Revilla
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta S/N, 36050, Guanajuato, México
| | - Massimiliano Bartolomei
- Consejo Superior de Investigaciones Científicas (IFF-CSIC), Instituto de Física Fundamental, Serrano 123, 28006, Madrid, Spain
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De Souza LA, Dos Santos HF, Costa LT, De Almeida WB. Inclusion complexes between cisplatin and oxidized carbon nanostructures: A theoretical approach. J Inorg Biochem 2018; 178:134-143. [DOI: 10.1016/j.jinorgbio.2017.10.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 10/05/2017] [Accepted: 10/30/2017] [Indexed: 11/26/2022]
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Nikfar Z, Shariatinia Z. Phosphate functionalized (4,4)-armchair CNTs as novel drug delivery systems for alendronate and etidronate anti-osteoporosis drugs. J Mol Graph Model 2017; 76:86-105. [DOI: 10.1016/j.jmgm.2017.06.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 06/17/2017] [Accepted: 06/19/2017] [Indexed: 11/26/2022]
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Recent advances in bioactive 1D and 2D carbon nanomaterials for biomedical applications. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2017; 14:2433-2454. [PMID: 28552644 DOI: 10.1016/j.nano.2017.03.021] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 02/09/2017] [Accepted: 03/06/2017] [Indexed: 12/18/2022]
Abstract
One-dimensional (1D) carbon nanotubes (CNTs) and the two-dimensional (2D) graphene represent the most widely studied allotropes of carbon. Due to their unique structural, electrical, mechanical and optical properties, 1D and 2D carbon nanostructures are considered to be leading candidates for numerous applications in biomedical fields, including tissue engineering, drug delivery, bioimaging and biosensors. The biocompatibility and toxicity issues associated with these nanostructures have been a critical impediment for their use in biomedical applications. In this review, we present an overview of the various materials types, properties, functionalization strategies and characterization methods of 1D and 2D carbon nanomaterials and their derivatives in terms of their biomedical applications. In addition, we discuss various factors and mechanisms affecting their toxicity and biocompatibility.
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dos Santos AM, Carvalho FC, Teixeira DA, Azevedo DL, de Barros WM, Gremião MPD. Computational and experimental approaches for development of methotrexate nanosuspensions by bottom-up nanoprecipitation. Int J Pharm 2017; 524:330-338. [DOI: 10.1016/j.ijpharm.2017.03.068] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 03/21/2017] [Accepted: 03/26/2017] [Indexed: 10/19/2022]
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Beyramabadi SA, Khadivjam T, Gonabadi A, Morsali A, Gharib A, Khashi M, Khorsandi-Chenarboo M. A DFT study on the geometry, tautomerism and noncovalent interactions of the Mepivacaine drug with the pristine SWCNT and –COOH functionalized SWCNT. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2017. [DOI: 10.1142/s0219633617500080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
The Mepivacaine drug is used as a local anesthetic in dentistry, which could exist as three different tautomers. Herein, geometry, energy behavior as well as tautomerization of these tautomers have been investigated by employing density functional theory (DFT) and considering the solvent effects with the polarizable continuum model (PCM) model. The most stable tautomer of the Mepivacaine has a carbonyl and an –NH amine groups in its structure. The frontier orbitals and the energy gap of the molecule have been computed using the natural bond orbital analysis (NBO). Also, the armchair (5,5) single wall carbon nanotube (SWCNT) was used for investigation of the noncovalent interactions of the Mepivacaine molecule with the pristine SWCNT and the –COOH functionalized SWCNT in several forms. Geometries of the possible forms have been optimized. The most stable form for noncovalent interactions of the drug with each of the pristine and functionalized SWCNTs have been determined. The intermolecular H-bonds have essential role in energy behavior of the noncovalent interactions between the Mepivacaine drug and the investigated SWCNTs.
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Affiliation(s)
- S. Ali Beyramabadi
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Tina Khadivjam
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Atoosa Gonabadi
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Ali Morsali
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Azar Gharib
- Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Maryam Khashi
- Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran
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De Souza LA, Da Silva AM, Dos Santos HF, De Almeida WB. Oxidized single-walled carbon nanotubes and nanocones: a DFT study. RSC Adv 2017. [DOI: 10.1039/c7ra00301c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
B3LYP/6-31G optimized structures of carbon nanotube oxidized model. The left and right pictures show the oxidized molecules on the cap and tubular regions, respectively.
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Affiliation(s)
- Leonardo A. De Souza
- Laboratório de Química Computacional (LQC)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense
- Niterói
| | - Antônio M. Da Silva
- Laboratório de Compostos Funcionais Semicondutores (LCFS)
- Departamento de Química
- Instituto de Ciências Exatas
- Universidade Federal Rural do Rio de Janeiro – UFRRJ
- Km 7 Seropédica
| | - Hélio F. Dos Santos
- Núcleo de Estudos em Química Computacional (NEQC)
- Departamento de Química
- ICE
- Universidade Federal de Juiz de Fora – UFJF
- Juiz de Fora
| | - Wagner B. De Almeida
- Laboratório de Química Computacional (LQC)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense
- Niterói
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