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Aarabi M, Aranda D, Gholami S, Meena SK, Lerouge F, Bretonniere Y, Gürol I, Baldeck P, Parola S, Dumoulin F, Cerezo J, Garavelli M, Santoro F, Rivalta I. Quantum-Classical Protocol for Efficient Characterization of Absorption Lineshape and Fluorescence Quenching upon Aggregation: The Case of Zinc Phthalocyanine Dyes. J Chem Theory Comput 2023; 19:5938-5957. [PMID: 37641958 PMCID: PMC10500990 DOI: 10.1021/acs.jctc.3c00446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Indexed: 08/31/2023]
Abstract
A quantum-classical protocol that incorporates Jahn-Teller vibronic coupling effects and cluster analysis of molecular dynamics simulations is reported, providing a tool for simulations of absorption spectra and ultrafast nonadiabatic dynamics in large molecular photosystems undergoing aggregation in solution. Employing zinc phthalocyanine dyes as target systems, we demonstrated that the proposed protocol provided fundamental information on vibronic, electronic couplings and thermal dynamical effects that mostly contribute to the absorption spectra lineshape and the fluorescence quenching processes upon dye aggregation. Decomposing the various effects arising upon dimer formation, the structure-property relations associated with their optical responses have been deciphered at atomistic resolution.
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Affiliation(s)
- Mohammad Aarabi
- Dipartimento
di Chimica Industriale “Toso Montanari”, Universitá degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Daniel Aranda
- Consiglio
Nazionale delle Ricerche, Istituto di Chimica
dei Composti Organo Metallici (ICCOM-CNR), I-56124 Pisa, Italy
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, Catedrático
J. Beltrán 2, 46980 Paterna, Valencia, Spain
| | - Samira Gholami
- Dipartimento
di Chimica Industriale “Toso Montanari”, Universitá degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Santosh Kumar Meena
- Department
of Chemical Engineering, Indian Institute
of Technology Ropar, Rupnagar, 140001 Punjab, India
| | - Frederic Lerouge
- ENSL,
CNRS, Laboratoire de Chimie UMR 5182, 46 Allée d’Italie, 69364 Lyon, France
| | - Yann Bretonniere
- ENSL,
CNRS, Laboratoire de Chimie UMR 5182, 46 Allée d’Italie, 69364 Lyon, France
| | - Ilke Gürol
- TÜBITAK
Marmara Research Center, Materials Technologies, Gebze, 41470 Kocaeli, Türkiye
| | - Patrice Baldeck
- ENSL,
CNRS, Laboratoire de Chimie UMR 5182, 46 Allée d’Italie, 69364 Lyon, France
| | - Stephane Parola
- ENSL,
CNRS, Laboratoire de Chimie UMR 5182, 46 Allée d’Italie, 69364 Lyon, France
| | - Fabienne Dumoulin
- Department
of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Acibadem Mehmet Ali Aydinlar University, 34752 Istanbul, Türkiye
| | - Javier Cerezo
- Consiglio
Nazionale delle Ricerche, Istituto di Chimica
dei Composti Organo Metallici (ICCOM-CNR), I-56124 Pisa, Italy
- Departamento
de Química and Institute for Advanced Research in Chemical
Sciences (IAdChem), Universidad Autónoma
de Madrid, 28049 Madrid, Spain
| | - Marco Garavelli
- Dipartimento
di Chimica Industriale “Toso Montanari”, Universitá degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Fabrizio Santoro
- Consiglio
Nazionale delle Ricerche, Istituto di Chimica
dei Composti Organo Metallici (ICCOM-CNR), I-56124 Pisa, Italy
| | - Ivan Rivalta
- Dipartimento
di Chimica Industriale “Toso Montanari”, Universitá degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
- ENSL,
CNRS, Laboratoire de Chimie UMR 5182, 46 Allée d’Italie, 69364 Lyon, France
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2
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Hussain A, Khan MU, Ibrahim M, Khalid M, Ali A, Hussain S, Saleem M, Ahmad N, Muhammad S, Al-Sehemi AG, Sultan A. Structural parameters, electronic, linear and nonlinear optical exploration of thiopyrimidine derivatives: A comparison between DFT/TDDFT and experimental study. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127183] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Reginato MM, Paiva DR, Sensato FR, Monteiro HP, Reis AKCA. Conformational study of the electronic interactions and nitric oxide release potential of new S‑nitrosothiols esters derivatives of ibuprofen, naproxen and phenyl acids substituted (SNO-ESTERS): Synthesis, infrared spectroscopy analysis and theoretical calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 207:132-142. [PMID: 30223247 DOI: 10.1016/j.saa.2018.09.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 09/08/2018] [Accepted: 09/10/2018] [Indexed: 06/08/2023]
Abstract
The conformational study on the new S‑nitrosothiols esters (SNO-ESTERS): para-substituted (X = H, OMe, Cl and NO2) S‑nitrosothiol derivatives 2‑methyl‑2‑(sulfanyl)propyl phenylacetates (R1), 2‑(4‑isobutylphenyl)propanoate (ibuprofen, R2), and 2‑(4‑isobutylphenyl)propanoate of 2‑methyl‑2‑(nitrososulfanyl)propyl (naproxen, R3) was performed using infrared spectroscopy (IR) in solvents with increasing polarity (CCl4, CH3Cl, and CH3CN), and theoretical calculations, to determine the preferential conformer and the potential of these compounds to release nitric oxide (NO). S‑Nitrosothiols were synthesized by esterification reactions, using chlorides of the corresponding carboxylic acids, with good yields (~60%). IR results showed that these compounds presented only one conformation, and the experimental data were supported by the theoretical results obtained by density functional theory (DFT) calculations using the 6311+G (2df, 2p) basis set. The calculations revealed that all S‑nitrosothiols presented one preferential anticlinal (ac) geometric conformation, which agrees with the data obtained experimentally in CCl4. These conformers are stabilized by intramolecular hydrogen bonds. Examination of the geometry with regard to the RSNO group revealed that these compounds are preferentially in the trans (anti) conformation. The calculation of the orbital interactions using the Natural Bond Orbital (NBO) method showed that the nO(NO) → σ(SN)∗ hyper-conjugative interaction increases the SN bond length. The strong nS → π(NO)∗ interaction and electronic delocalization induces a partial π character to the SN bond. The weak σSN bond indicates strong delocalization of the electron pair in O (NO) by the nO(NO) → σ(SN)∗ interaction, thereby increasing the capacity of NO release from SNO-ESTERS.
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Affiliation(s)
- Marcelo Mota Reginato
- Department of Chemistry, Institute of Environmental, Chemical and Pharmaceutical Sciences, Universidade Federal de São Paulo - Campus Diadema, Brazil
| | - Derisvaldo Rosa Paiva
- Department of Chemistry, Institute of Environmental, Chemical and Pharmaceutical Sciences, Universidade Federal de São Paulo - Campus Diadema, Brazil
| | - Fabrício Ronil Sensato
- Department of Chemistry, Institute of Environmental, Chemical and Pharmaceutical Sciences, Universidade Federal de São Paulo - Campus Diadema, Brazil
| | - Hugo Pequeno Monteiro
- Department of Biochemistry, Center for Cellular and Molecular Therapy, Universidade Federal de São Paulo - Campus São Paulo, Brazil
| | - Adriana Karla Cardoso Amorim Reis
- Department of Chemistry, Institute of Environmental, Chemical and Pharmaceutical Sciences, Universidade Federal de São Paulo - Campus Diadema, Brazil.
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Fizer O, Fizer M, Sidey V, Studenyak Y, Mariychuk R. Benchmark of different charges for prediction of the partitioning coefficient through the hydrophilic/lipophilic index. J Mol Model 2018; 24:141. [PMID: 29855716 DOI: 10.1007/s00894-018-3692-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 05/22/2018] [Indexed: 10/14/2022]
Abstract
A few different theoretical methods for assigning the partial atomic charges were benchmarked for calculation of the hydrophilic/lipophilic index (HLI). The coefficients were selected to produce the best correlation of the HLI values with the experimental octanol-water partition. Different parameters were checked in calculations of partial charges to get the best performance of the HLI values obtained. Thus, four partitioning schemes (Coulson, Mulliken, Merz-Kollman, Ford-Wang) were benchmarked for calculations of atomic charges with six semiempirical methods (AM1, PM3, RM1, PM6, PM6-D3H4, PM7). Moreover, five distinct types of partial atomic charges (Mulliken, Hirshfeld, Löwdin, CHELPG, NPA), obtained at the Hartree-Fock and DFT levels of theory with three basis sets, were tested for their ability to produce the HLI values with the best correlation to experimental logP coefficients of 50 mono-charged organic anions. In the case of the semiempirical methods, the best correlation between the HLI and logP values (the correlation coefficient r = 0.9216) was obtained with the AM1 Ford-Wang parametric electrostatic potential charges. The Mulliken and Coulson charges calculated with the PM7 method can be used as an alternative to AM1, with the r values of 0.9107 and 0.8984, respectively. In the case of the DFT, the PBE/def2-TZVP natural population analysis charges produce the best correlation (r = 0.9220). Nevertheless, in spite of a marginally lower performance (r = 0.9159), the NPA charges computed at the PBE/def2-SVP level are more robust and can be regarded as the optimum choice for calculating the HLI values. Graphical abstract The hydrophilic/lipophilic index (HLI).
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Affiliation(s)
- Oksana Fizer
- Faculty of Chemistry, Uzhhorod National University, Pidhirna Str. 46, Uzhhorod, 88000, Ukraine.,Faculty of Humanity and Natural Sciences, University of Prešov in Prešov, 17th November 1, Prešov, 08116, Slovak Republic
| | - Maksym Fizer
- Faculty of Chemistry, Uzhhorod National University, Pidhirna Str. 46, Uzhhorod, 88000, Ukraine.
| | - Vasyl Sidey
- Research Institute for Physics and Chemistry of Solid State, Uzhhorod National University, Pidhirna Str. 46, Uzhhorod, 88000, Ukraine
| | - Yaroslav Studenyak
- Faculty of Chemistry, Uzhhorod National University, Pidhirna Str. 46, Uzhhorod, 88000, Ukraine
| | - Ruslan Mariychuk
- Faculty of Humanity and Natural Sciences, University of Prešov in Prešov, 17th November 1, Prešov, 08116, Slovak Republic
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Liu B, Hoopes MI, Karttunen M. Molecular Dynamics Simulations of DPPC/CTAB Monolayers at the Air/Water Interface. J Phys Chem B 2014; 118:11723-37. [PMID: 25222268 DOI: 10.1021/jp5050892] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Bin Liu
- Department of Chemistry and
Waterloo Institute for Nanotechnology, University of Waterloo, 200 University
Avenue West, Waterloo, Ontario, Canada N2L 3G1
| | - Matthew I. Hoopes
- Department of Chemistry and
Waterloo Institute for Nanotechnology, University of Waterloo, 200 University
Avenue West, Waterloo, Ontario, Canada N2L 3G1
| | - Mikko Karttunen
- Department of Chemistry and
Waterloo Institute for Nanotechnology, University of Waterloo, 200 University
Avenue West, Waterloo, Ontario, Canada N2L 3G1
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Costa AB, Cooks RG. Origin of chiral selectivity in gas-phase serine tetramers. Phys Chem Chem Phys 2011; 13:877-85. [DOI: 10.1039/c0cp01402h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Madeira PJA, Borges CM, Florêncio MH. Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometric and semi-empirical calculations study of five isoflavone aglycones. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2010; 24:3432-3440. [PMID: 21072799 DOI: 10.1002/rcm.4791] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Five isoflavones, daidzein, genistein, formononetin, prunetin and biochanin A, known for their biological properties, are investigated by electrospray ionization mass spectrometry in the positive ion mode. The most probable protonation sites are determined taking into account semi-empirical calculations using the PM6 Hamiltonian. Fragmentation mechanisms are proposed based on accurate mass measurements, MS(3) experiments and supported by the semi-empirical calculations. Some of the fragmentation pathways were found to be dependent on the substitution pattern of the B-ring and the ions afforded by these fragmentations can be considered as diagnostic. It was possible to distinguish between prunetin and biochanin A, two isobaric isoflavone aglycones included in this study. Furthermore, a comparison of the fragmentation patterns of genistein and biochanin A, two isoflavones, with those of their flavone counterparts, apigenin and acacetin, enabled us to identify some key ions mainly due to structural features, allowing distinction to be made between these two classes of compounds.
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Affiliation(s)
- Paulo J Amorim Madeira
- Departamento de Química e Bioquímica/Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Edifício C8, Campo Grande, 1749 016 Lisboa, Portugal
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Xu LJ, Zhu CB, Yan JM. Investigation on the computation of atomic multipole moments with the modified cumulative potential-derived semiempirical method. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.19970150602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Cramer B, Takahata Y. QSAR of Clerodane Diterpenoids with Cytotoxic and Antitumoral Activity Against V-79 Cells. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/qsar.200960038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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11
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Mukherjee S, Nagar S, Mullick S, Mukherjee A, Saha A. Pharmacophore mapping of arylbenzothiophene derivatives for MCF cell inhibition using classical and 3D space modeling approaches. J Mol Graph Model 2008; 26:884-92. [PMID: 17643328 DOI: 10.1016/j.jmgm.2007.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2007] [Revised: 06/11/2007] [Accepted: 06/11/2007] [Indexed: 11/19/2022]
Abstract
Considering the worth of developing non-steroidal estrogen analogs, the present study explores the pharmacophore features of arylbenzothiophene derivatives for inhibitory activity to MCF-7 cells using classical QSAR and 3D space modeling approaches. The analysis shows that presence of phenolic hydroxyl group and ketonic linkage in the basic side chain of 2-arylbenzothiophene core of raloxifene derivatives are crucial. Additionally piperidine ring connected through ether linkage is favorable for inhibition of breast cancer cell line. These features for inhibitory activity are also highlighted through 3D space modeling approach that explored importance of critical inter features distance among HB-acceptor lipid, hydrophobic and HB-donor features in the arylbenzothiophene scaffold for activity.
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Affiliation(s)
- Subhendu Mukherjee
- Department of Chemical Technology, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
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Stewart JJP. Optimization of parameters for semiempirical methods V: modification of NDDO approximations and application to 70 elements. J Mol Model 2007; 13:1173-213. [PMID: 17828561 PMCID: PMC2039871 DOI: 10.1007/s00894-007-0233-4] [Citation(s) in RCA: 2414] [Impact Index Per Article: 142.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2007] [Accepted: 07/10/2007] [Indexed: 11/28/2022]
Abstract
Several modifications that have been made to the NDDO core-core interaction term and to the method of parameter optimization are described. These changes have resulted in a more complete parameter optimization, called PM6, which has, in turn, allowed 70 elements to be parameterized. The average unsigned error (AUE) between calculated and reference heats of formation for 4,492 species was 8.0 kcal mol(-1). For the subset of 1,373 compounds involving only the elements H, C, N, O, F, P, S, Cl, and Br, the PM6 AUE was 4.4 kcal mol(-1). The equivalent AUE for other methods were: RM1: 5.0, B3LYP 6-31G*: 5.2, PM5: 5.7, PM3: 6.3, HF 6-31G*: 7.4, and AM1: 10.0 kcal mol(-1). Several long-standing faults in AM1 and PM3 have been corrected and significant improvements have been made in the prediction of geometries.
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Affiliation(s)
- James J P Stewart
- Stewart Computational Chemistry, 15210 Paddington Circle, Colorado Springs, CO 80921, USA.
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Thiel W. Perspectives on Semiempirical Molecular Orbital Theory. ADVANCES IN CHEMICAL PHYSICS 2007. [DOI: 10.1002/9780470141526.ch10] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Binev YI, Tsenov JA, Juchnovski IN, Binev IG. Ab initio, DFT and experimental studies on the IR spectra and structure of propanedinitrile (malononitrile) and its carbanion. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0166-1280(03)00022-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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A theoretical and experimental study on the solubility, dissolution rate, structure and dipolar moment of flavone in ethanol. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0166-1280(02)00027-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Orozco M, Luque FJ. Theoretical Methods for the Description of the Solvent Effect in Biomolecular Systems. Chem Rev 2000; 100:4187-4226. [PMID: 11749344 DOI: 10.1021/cr990052a] [Citation(s) in RCA: 454] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Modesto Orozco
- Departament de Bioquímica i Biologia Molecular, Facultat de Química, Universitat de Barcelona, Martí i Franqués 1, E-08028 Barcelona, Spain, and Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avgda. Diagonal s/n, E-08028 Barcelona, Spain
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Luque FJ, Reuter N, Cartier A, Ruiz-López MF. Calibration of the Quantum/Classical Hamiltonian in Semiempirical QM/MM AM1 and PM3 Methods. J Phys Chem A 2000. [DOI: 10.1021/jp001974g] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F. J. Luque
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal s/n, 08028 Barcelona, Spain
| | - N. Reuter
- Unité de Recherche CNRS-UHP 7565, Laboratoire de Chimie Théorique, Université Henri Poincaré-Nancy I, BP 239, 54506 Vandoeuvre-lès-Nancy, France
| | - A. Cartier
- Unité de Recherche CNRS-UHP 7565, Laboratoire de Chimie Théorique, Université Henri Poincaré-Nancy I, BP 239, 54506 Vandoeuvre-lès-Nancy, France
| | - M. F. Ruiz-López
- Unité de Recherche CNRS-UHP 7565, Laboratoire de Chimie Théorique, Université Henri Poincaré-Nancy I, BP 239, 54506 Vandoeuvre-lès-Nancy, France
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Ford G, Wang B. Implicit allowance for “specific” hydrogen bonding contributions to hydration energies in quantum chemically based continuum models: a phenomenological perspective. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0166-1280(99)00071-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Marynick DS. Accurate molecular electrostatic potentials based on modified PRDDO/M wave functions: III. Extension of thePESP method for calculation of electrostatic potential-derived atomic charges to compounds containing Li+, Na+, Mg2+, K+, Ca2+, Zn2+, and I. J Comput Chem 1998. [DOI: 10.1002/(sici)1096-987x(199810)19:13<1456::aid-jcc3>3.0.co;2-p] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Barrows SE, Storer JW, Cramer CJ, French AD, Truhlar DG. Factors controlling relative stability of anomers and hydroxymethyl conformers of glucopyranose. J Comput Chem 1998. [DOI: 10.1002/(sici)1096-987x(19980730)19:10<1111::aid-jcc1>3.0.co;2-p] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Barrows SE, Storer JW, Cramer CJ, French AD, Truhlar DG. Factors controlling relative stability of anomers and hydroxymethyl conformers of glucopyranose. J Comput Chem 1998. [DOI: 10.1002/(sici)1096-987x(19980730)19:10%3c1111::aid-jcc1%3e3.0.co;2-p] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Marynick DS. Accurate molecular electrostatic potentials based on modified PRDDO/M wave functions: II. Electrostatic potentials inside the molecular van der Waals envelope. J Comput Chem 1997. [DOI: 10.1002/(sici)1096-987x(199710)18:13<1682::aid-jcc10>3.0.co;2-k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Marynick DS. Accurate molecular electrostatic potentials based on modified PRDDO/M wave functions. I. Electrostatic potential derived atomic charges. J Comput Chem 1997. [DOI: 10.1002/(sici)1096-987x(199705)18:7<955::aid-jcc7>3.0.co;2-q] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rameau JP, Devillers J, Declercq JP, Chauviere G, Perie J. Molecular structure of 2-Amino-5-(1-methyl-5-nitro-2-imidazolyl)-1,3,4-thiadiazol (Megazol) and related compounds: A concerted study using X-ray crystallography, molecular mechanics, and semiempirical methods. Struct Chem 1996. [DOI: 10.1007/bf02281230] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Nakajima H, Takahashi O, Kikuchi O. Rapid evaluation of molecular electrostatic potential maps for amino acids, peptides, and proteins by empirical functions. J Comput Chem 1996. [DOI: 10.1002/(sici)1096-987x(199605)17:7<790::aid-jcc4>3.0.co;2-n] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Semiempirical treatment of electrostatic potentials and partial charges in combined quantum mechanical and molecular mechanical approaches. J Comput Chem 1996. [DOI: 10.1002/(sici)1096-987x(19960115)17:1<87::aid-jcc8>3.0.co;2-x] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Orozco M, Luque FJ. Generalization of the Molecular Electrostatic Potential for the Study of Noncovalent interactions. THEORETICAL AND COMPUTATIONAL CHEMISTRY 1996. [DOI: 10.1016/s1380-7323(96)80044-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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32
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Molecular electrostatic potentials and fields: hydrogen bonding, recognition, reactivity and modelling. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s1380-7323(96)80046-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Barrows SE, Dulles FJ, Cramer CJ, French AD, Truhlar DG. Relative stability of alternative chair forms and hydroxymethyl conformations of β-d-glucopyranose. Carbohydr Res 1995. [DOI: 10.1016/0008-6215(95)00175-s] [Citation(s) in RCA: 135] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Cummins PL, Gready JE. The electrostatic potential in the semiempirical molecular orbital approximation. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)00617-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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