1
|
Hernandes IS, Da Silva HC, Dos Santos HF, Ávila EP, De Almeida MV, De Almeida WB. Quantum chemical investigation of predominant conformation of the antibiotic azithromycin in water and DMSO solutions: thermodynamic and NMR analysis. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230409. [PMID: 37830015 PMCID: PMC10565400 DOI: 10.1098/rsos.230409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 09/12/2023] [Indexed: 10/14/2023]
Abstract
Azithromycin (AZM) is a macrolide-type antibiotic used to prevent and treat serious infections (mycobacteria or MAC) that significantly inhibit bacterial growth. Knowledge of the predominant conformation in solution is of fundamental importance for advancing our understanding of the intermolecular interactions of AZM with biological targets. We report an extensive density functional theory (DFT) study of plausible AZM structures in solution considering implicit and explicit solvent effects. The best match between the experimental and theoretical nuclear magnetic resonance (NMR) profiles was used to assign the preferred conformer in solution, which was supported by the thermodynamic analysis. Among the 15 distinct AZM structures, conformer M14, having a short intramolecular C6-OH … N H-bond, is predicted to be dominant in water and dimethyl sulfoxide (DMSO) solutions. The results indicated that the X-ray structure backbone is mostly conserved in solution, showing that large flexible molecules with several possible conformations may assume a preferential spatial orientation in solution, which is the molecular structure that ultimately interacts with biological targets.
Collapse
Affiliation(s)
- Isabel S. Hernandes
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, 24020-141, Centro, Niterói, RJ, Brazil
| | - Haroldo C. Da Silva
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, 24020-141, Centro, Niterói, RJ, Brazil
| | - Hélio F. Dos Santos
- Núcleo de Estudos em Química Computacional, Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG 36036-900, Brazil
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora (UFJF), Campus Universitário, Martelos, Juiz de Fora, MG 36036-330, Brazil
| | - Eloah P. Ávila
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora (UFJF), Campus Universitário, Martelos, Juiz de Fora, MG 36036-330, Brazil
| | - Mauro V. De Almeida
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora (UFJF), Campus Universitário, Martelos, Juiz de Fora, MG 36036-330, Brazil
| | - Wagner B. De Almeida
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, 24020-141, Centro, Niterói, RJ, Brazil
| |
Collapse
|
2
|
Liao X, Ji P, Chi K, Chen X, Zhou Y, Chen S, Cheng Y, Flaumenhaft R, Yuan C, Huang M. Enhanced inhibition of protein disulfide isomerase and anti-thrombotic activity of a rutin derivative: rutin:Zn complex. RSC Adv 2023; 13:11464-11471. [PMID: 37063725 PMCID: PMC10090900 DOI: 10.1039/d3ra01135f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 03/17/2023] [Indexed: 04/18/2023] Open
Abstract
Rutin is a flavonoid that exists in plants and in commonly consumed foods. In recent years, rutin has been demonstrated to have anti-thrombotic efficacy through its inhibition of protein disulfide isomerase. However, the low aqueous solubility and high dose limit the therapeutic applications of rutin. In this study, we found that the chelation of zinc ions increased rutin aqueous solubility by 4-fold. More importantly, the thus-formed rutin:Zn complex inhibited PDI activity more potently than rutin itself. In a murine model with electric current-induced arterial thrombosis, the rutin:Zn complex slowed mouse arterial occlusion compared to rutin without increasing bleeding risk. Thus, the zinc chelation not only improved rutin aqueous solubility but achieved stronger inhibition of PDI. Furthermore, zinc chelation of a selected list of flavonoids containing the adjacent keto and phenoxy groups also increased their inhibition of PDI. Hence, our study provides a strategy to promote flavonoids' anti-thrombotic properties.
Collapse
Affiliation(s)
- Xinyuan Liao
- College of Chemistry, Fuzhou University Fujian 350108 China
| | - Panpan Ji
- College of Biological Science and Engineering, Fuzhou University Fuzhou Fujian 350108 China
| | - Kunxiang Chi
- College of Chemistry, Fuzhou University Fujian 350108 China
| | - Xueying Chen
- College of Chemistry, Fuzhou University Fujian 350108 China
| | - Yang Zhou
- College of Chemistry, Fuzhou University Fujian 350108 China
| | - Shanli Chen
- College of Chemistry, Fuzhou University Fujian 350108 China
| | - Yuan Cheng
- College of Chemistry, Fuzhou University Fujian 350108 China
| | - Robert Flaumenhaft
- Division of Hemostasis and Thrombosis, Beth Israel Deaconess Medical Center, Harvard Medical School Boston MA 02215 USA
| | - Cai Yuan
- College of Biological Science and Engineering, Fuzhou University Fuzhou Fujian 350108 China
| | - Mingdong Huang
- College of Chemistry, Fuzhou University Fujian 350108 China
| |
Collapse
|
3
|
Guo S, Gu D, Liu C, Tang S, Wang Y, Yang Y. High-speed counter-current chromatographic separation and thermodynamic mechanism of an antioxidant from Morus alba leaves. BIOCHEM SYST ECOL 2023. [DOI: 10.1016/j.bse.2023.104617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
|
4
|
Single crystal investigation, spectroscopic, DFT studies, and in-silico molecular docking of the anticancer activities of acetylacetone coordinated Re(I) tricarbonyl complexes. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2022.121335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
5
|
Hitchhiking into a cell: flavonoids may produce complexes with transition metals for transmembrane translocation. Biometals 2022; 35:1299-1306. [PMID: 36161545 DOI: 10.1007/s10534-022-00445-x] [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: 07/04/2022] [Accepted: 09/12/2022] [Indexed: 12/14/2022]
Abstract
Flavonoids are a group of food polyphenols that are delivered to the human body with plant foods. In recent years, these substances have attracted the attention of researchers due to their effectiveness in preventing a wide variety of diseases, including neurodegenerative, oncological, autoimmune, and cardiovascular. Similar pathologies may also occur with a lack of some first-row transition metals, including Cu(II), Zn(II), Mn(II), Fe(II/III). It is noteworthy that flavonoids are known as transition metal chelators. When a complex with these metals is formed, the therapeutic effect of flavonoids can be enhanced, assuming the possibility of synergy. Molecular models have shown that the lipophilicity of flavonoid-metal complexes can vary significantly depending on their binding stoichiometry. Therefore, a unique process of translocation of flavonoid-metal complexes of various lipophilicity through cell membranes is assumed, based on the possibility of their sequential association and dissociation, called "hitchhiking". It is expected that studies of the interaction of flavonoids with metals will improve the effectiveness of drugs based on flavonoids.
Collapse
|
6
|
Li J, Zhu J, Wu H, Li W. Synthesis, in vitro, and in silico studies of fisetin and quercetin and their metal complexes as inhibitors of α-glucosidase and thrombin. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118164] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
7
|
Raletsena MV, Mdlalose S, Bodede OS, Assress HA, Woldesemayat AA, Modise DM. 1H-NMR and LC-MS Based Metabolomics Analysis of Potato ( Solanum tuberosum L.) Cultivars Irrigated with Fly Ash Treated Acid Mine Drainage. Molecules 2022; 27:1187. [PMID: 35208975 PMCID: PMC8877823 DOI: 10.3390/molecules27041187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 11/24/2022] Open
Abstract
1H NMR and LC-MS, commonly used metabolomics analytical platforms, were used to annotate the metabolites found in potato (Solanum tuberosum L.) irrigated with four different treatments based on FA to AMD ratios, namely: control (0% AMD; tap water), 1:1 (50% AMD), 3:1 (75% AMD is 75% FA: AMD), and 100% AMD (untreated). The effects of stress on plants were illustrated by the primary metabolite shifts in the region from δH 0.0 to δH 4.0 and secondary metabolites peaks were prominent in the region ranging from δH 4.5 to δH 8.0. The 1:3 irrigation treatment enabled, in two potato cultivars, the production of significantly high concentrations of secondary metabolites due to the 75% FA: AMD content in the irrigation mixture, which induced stress. The findings suggested that 1:1 irrigation treatment induced production of lower amounts of secondary metabolites in all crops compared to crops irrigated with untreated acid mine drainage treatment and with other FA-treated AMD solutions.
Collapse
Affiliation(s)
- Maropeng V. Raletsena
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, Private Bag X6, Florida 1710, South Africa; (S.M.); (O.S.B.)
| | - Samukelisiwe Mdlalose
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, Private Bag X6, Florida 1710, South Africa; (S.M.); (O.S.B.)
| | - Olusola S. Bodede
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, Private Bag X6, Florida 1710, South Africa; (S.M.); (O.S.B.)
| | - Hailemariam A. Assress
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202, USA;
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA
| | - Adugna A. Woldesemayat
- Genomics and Bioinformatics Research Unit, Department of Biotechnology, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia;
| | - David M. Modise
- Food Security and Safety (FSS), Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mahikeng 2735, South Africa;
| |
Collapse
|
8
|
Aliabadi A, Zangeneh M, Izadi Z, Badzohre M, Ghadermazi M, Marabello D, Bagheri F, Farokhi A, Motieiyan E, Abdolmaleki S. Green synthesis, X-ray crystal structure, evaluation as in vitro cytotoxic and antibacterial agents of a new Zn(II) complex containing dipicolinic acid. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131327] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
9
|
Da Silva HC, Paluch AS, Costa LT, De Almeida WB. Thermodynamic and structural description of relative solubility of the flavonoid rutin by DFT calculations and molecular dynamics simulations. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
10
|
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]
|
11
|
Hernandes IS, Da Silva HC, Dos Santos HF, De Almeida WB. Unveiling the Molecular Structure of Antimalarial Drugs Chloroquine and Hydroxychloroquine in Solution through Analysis of 1H NMR Chemical Shifts. J Phys Chem B 2021; 125:3321-3342. [PMID: 33760611 DOI: 10.1021/acs.jpcb.1c00609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chloroquine (CQ) and hydroxychloroquine (HCQ) have been standard antimalarial drugs since the early 1950s, and very recently, the possibility of their use for the treatment of COVID-19 patients has been considered. To understand the drug mode of action at the submicroscopic level (atoms and molecules), molecular modeling studies with the aid of computational chemistry methods have been of great help. A fundamental step in such theoretical investigations is the knowledge of the predominant drug molecular structure in solution, which is the real environment for the interaction with biological targets. Our strategy to access this valuable information is to perform density functional theory (DFT) calculations of 1H NMR chemical shifts for several plausible molecular conformers and then find the best match with experimental NMR profile in solution (since it is extremely sensitive to conformational changes). Through this procedure, after optimizing 30 trial distinct molecular structures (ωB97x-D/6-31G(d,p)-PCM level of calculation), which may be considered representative conformations, we concluded that the global minimum (named M24), stabilized by an intramolecular N-H hydrogen bond, is not likely to be observed in water, chloroform, and dimethyl sulfoxide (DMSO) solution. Among fully optimized conformations (named M1 to M30, and MD1 and MD2), we found M12 (having no intramolecular H-bond) as the most probable structure of CQ and HCQ in water solution, which is a good approximate starting geometry in drug-receptor interaction simulations. On the other hand, the preferred CQ and HCQ structure in chloroform (and CQ in DMSO-d6) solution was assigned as M8, showing the solvent effects on conformational preferences. We believe that the analysis of 1H NMR data in solution can establish the connection between the macro level (experimental) and the sub-micro level (theoretical), which is not so apparent to us and appears to be more appropriate than the thermodynamic stability criterion in conformational analysis studies.
Collapse
Affiliation(s)
- Isabel S Hernandes
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, Centro, Niterói 24020-141, Rio de Janeiro, Brazil
| | - Haroldo C Da Silva
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, Centro, Niterói 24020-141, Rio de Janeiro, Brazil
| | - Hélio F Dos Santos
- Núcleo de Estudos em Química Computacional (NEQC), Departamento de Química, ICE, Universidade Federal de Juiz de Fora (UFJF), Campus Universitário, Martelos, Juiz de Fora 36036-330, Minas Gerais, Brazil
| | - Wagner B De Almeida
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, Centro, Niterói 24020-141, Rio de Janeiro, Brazil
| |
Collapse
|
12
|
Da Silva HC, Hernandes IS, De Almeida WB. Quantum chemical investigation of beta-CD–catechin flavonoid encapsulation in solution through NMR analysis: an adequate controlled drug-delivery system. NEW J CHEM 2021. [DOI: 10.1039/d1nj02756e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT–PCM–water calculations of 1H NMR chemical shifts for 28 optimized catechin–beta-CD complex structures revealed that adsorption mode of complexion should be predominant in aqueous media, with full-inclusion 1 : 1 structure being in total disagreement with experimental 1H NMR profile (D2O).
Collapse
Affiliation(s)
- Haroldo C. Da Silva
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense (UFF)
- Niterói
| | - Isabel S. Hernandes
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense (UFF)
- Niterói
| | - Wagner B. De Almeida
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense (UFF)
- Niterói
| |
Collapse
|
13
|
Farha AK, Gan RY, Li HB, Wu DT, Atanasov AG, Gul K, Zhang JR, Yang QQ, Corke H. The anticancer potential of the dietary polyphenol rutin: Current status, challenges, and perspectives. Crit Rev Food Sci Nutr 2020; 62:832-859. [PMID: 33054344 DOI: 10.1080/10408398.2020.1829541] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Rutin is one of the most common dietary polyphenols found in vegetables, fruits, and other plants. It is metabolized by the mammalian gut microbiota and absorbed from the intestines, and becomes bioavailable in the form of conjugated metabolites. Rutin exhibits a plethora of bioactive properties, making it an extremely promising phytochemical. Numerous studies demonstrate that rutin can act as a chemotherapeutic and chemopreventive agent, and its anticancer effects can be mediated through the suppression of cell proliferation, the induction of apoptosis or autophagy, and the hindering of angiogenesis and metastasis. Rutin has been found to modulate multiple molecular targets involved in carcinogenesis, such as cell cycle mediators, cellular kinases, inflammatory cytokines, transcription factors, drug transporters, and reactive oxygen species. This review summarizes the natural sources of rutin, its bioavailability, and in particular its potential use as an anticancer agent, with highlighting its anticancer mechanisms as well as molecular targets. Additionally, this review updates the anticancer potential of its analogs, nanoformulations, and metabolites, and discusses relevant safety issues. Overall, rutin is a promising natural dietary compound with promising anticancer potential and can be widely used in functional foods, dietary supplements, and pharmaceuticals for the prevention and management of cancer.
Collapse
Affiliation(s)
- Arakkaveettil Kabeer Farha
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Ren-You Gan
- Research Center for Plants and Human Health, Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China
| | - Hua-Bin Li
- Department of Nutrition, School of Public Health, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Guangdong Engineering Technology Research Center of Nutrition Translation, Sun Yat-Sen University, Guangzhou, China
| | - Ding-Tao Wu
- Institute of Food Processing and Safety, College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - Atanas G Atanasov
- Ludwig Boltzmann Institute for Digital Health and Patient Safety, Medical University of Vienna, Vienna, Austria.,Institute of Genetics and Animal Breeding, Polish Academy of Sciences, Magdalenka, Poland
| | - Khalid Gul
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Jia-Rong Zhang
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Qiong-Qiong Yang
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Harold Corke
- Biotechnology and Food Engineering Program, Guangdong Technion - Israel Institute of Technology, Shantou, China
| |
Collapse
|
14
|
Hernandes IS, Da Silva HC, Dos Santos HF, De Almeida WB. Conformational Analysis of 5,4'-Dihydroxy-7,5',3'-trimethoxyisoflavone in Solution Using 1H NMR: A Density Functional Theory Approach. J Phys Chem A 2020; 124:5182-5193. [PMID: 32466649 DOI: 10.1021/acs.jpca.0c02996] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Among 20 compounds isolated from the extracts of Ouratea ferruginea the 5,4'-dihydroxy-7,5',3'-trimethoxyisoflavone (9) showed the best inhibitory effect on glutathione S-transferase (GST) and so deserves our attention. In this work we investigated the preferred molecular structure of 9 in chloroform solution using the density functional theory (DFT) and molecular dynamics simulation. Comparison between experimental 1H NMR data in CDCl3 solution and calculated chemical shifts enabled us to precisely determine the conformation adopted by 9 in solution, which can be used in further theoretical studies involving interaction with biological targets. Moreover, the experimental NMR data were used as reference to assess the ability of DFT based methods to predict 1H NMR spectrum in solution for organic compounds. Among various DFT functionals the hybrid B3LYP was the most adequate for the calculation of chemical shifts in what CHn protons are concerned. Regarding the OH hydrogen, inclusion of explicit CHCl3 solvent molecules adequately placed around the solute led to good agreement with the experimental chemical shifts (in CDCl3). It is a well-known fact that theoretical prediction of chemical shifts for OH hydrogens poses as a challenge and also revealed that the way the solvent effects are included in the DFT calculations is crucial for the right prediction of the whole 1H NMR spectrum. It was found in this work that a supermolecule solute-solvent calculation with a minimum of four CHCl3 molecules is enough to correctly reproduce the 1H NMR experimental profile observed in solution, revealing that the calculated solvated structure used to reproduce the NMR chemical shifts is not unique.
Collapse
Affiliation(s)
- Isabel S Hernandes
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, Centro, Niterói, RJ 24020-141, Brazil
| | - Haroldo C Da Silva
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, Centro, Niterói, RJ 24020-141, Brazil
| | - Hélio F Dos Santos
- Núcleo de Estudos em Química Computacional (NEQC), Departamento de Química, ICE, Universidade Federal de Juiz de Fora (UFJF), Campus Universitário, Martelos, Juiz de Fora, MG 36036-330, Brazil
| | - Wagner B De Almeida
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM), Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Fluminense (UFF), Outeiro de São João Batista s/n, Campus do Valonguinho, Centro, Niterói, RJ 24020-141, Brazil
| |
Collapse
|
15
|
Da Silva HC, Da Silva ANR, Da Rocha TLS, Hernandes IS, Dos Santos HF, De Almeida WB. Structure of the flavonoid catechin in solution: NMR and quantum chemical investigations. NEW J CHEM 2020. [DOI: 10.1039/d0nj03251d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT-PCM statistical index scan curves and 1H-NMR profiles reveal conformational changes when a solid catechin sample is dissolved in acetone solvent.
Collapse
Affiliation(s)
- Haroldo C. Da Silva
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense (UFF)
- Outeiro de São João Batista s/n
| | - Anna N. R. Da Silva
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense (UFF)
- Outeiro de São João Batista s/n
| | - Theo L. S. Da Rocha
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense (UFF)
- Outeiro de São João Batista s/n
| | - Isabel S. Hernandes
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense (UFF)
- Outeiro de São João Batista s/n
| | - Hélio F. Dos Santos
- Núcleo de Estudos em Química Computacional (NEQC)
- Departamento de Química
- ICE
- Universidade Federal de Juiz de Fora (UFJF)
- Campus Universitário
| | - Wagner B. De Almeida
- Laboratório de Química Computacional e Modelagem Molecular (LQC-MM)
- Departamento de Química Inorgânica
- Instituto de Química
- Universidade Federal Fluminense (UFF)
- Outeiro de São João Batista s/n
| |
Collapse
|