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Barzaga R, Lestón-Sánchez L, Aguilar-Galindo F, Estévez-Hernández O, Díaz-Tendero S. Synergy Effects in Heavy Metal Ion Chelation with Aryl- and Aroyl-Substituted Thiourea Derivatives. Inorg Chem 2021; 60:11984-12000. [PMID: 34308640 DOI: 10.1021/acs.inorgchem.1c01068] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Detection and removal of metal ion contaminants have attracted great interest due to the health risks that they represent for humans and wildlife. Among the proposed compounds developed for these purposes, thiourea derivatives have been shown as quite efficient chelating agents of metal cations and have been proposed for heavy metal ion removal and for components of high-selectivity sensors. Understanding the nature of metal-ionophore activity for these compounds is thus of high relevance. We present a theoretical study on the interaction between substituted thioureas and metal cations, namely, Cd2+, Hg2+, and Pb2+. Two substituent groups have been chosen: 2-furoyl and m-trifluoromethylphenyl. Combining density functional theory simulations with wave function analysis techniques, we study the nature of the metal-thiourea interaction and characterize the bonding properties. Here, it is shown how the N,N'-disubstituted derivative has a strong affinity for Hg2+, through cation-hydrogen interactions, due to its greater oxidizing capacity.
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Affiliation(s)
- Ransel Barzaga
- Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, 10400 La Habana, Cuba.,Departmento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Lucia Lestón-Sánchez
- Departmento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Fernando Aguilar-Galindo
- Departmento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, Donostia-San Sebastián, E-20018, Spain
| | | | - Sergio Díaz-Tendero
- Departmento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Institute for Advanced Research in Chemical Science (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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2
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Lamsabhi AM, Mó O, Yáñez M, Salpin JY. Combined Experimental and Theoretical Survey of the Gas-Phase Reactions of Serine-Ca 2+ Adducts. J Phys Chem A 2019; 123:6241-6250. [PMID: 31268328 DOI: 10.1021/acs.jpca.9b03977] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The association of Ca2+ to serine and the subsequent gas-phase unimolecular reactivity of the [Ca(Ser)]2+ (Ser = Serine) adduct was investigated throughout the use of tandem mass spectrometry techniques and B3LYP/6-311+G(3df,2p)//B3LYP/6-311+G(d,p) density functional theory calculations. In a first step, the structure and relative stability of all possible conformers of serine were obtained and analyzed, as well as the most stable [serine-Ca]2+ adducts. For the analysis of the different potential energy surfaces associated with the gas-phase unimolecular reactivity of these adducts, only those that differ by less than 100 kJ·mol-1 from the global minimum were taken into account. In agreement with previous studies, the serine-Ca2+ global minimum corresponds to a charge-solvated structure in which Ca is tricoordinated to neutral serine. The major peaks observed in the nanoelectrospray-MS/MS spectrum of [Ca(Ser)]2+ adduct correspond to both Coulomb explosions, yielding either CaOH+ + [C3,H6,N,O2]+ or [C2,H4,O,N]+ + [Ca(C,H3,O2)]+, and to the loss of neutrals, namely, CH2O and H2O. Our theoretical survey of the energy profile allow us to conclude that, although all the aforementioned fragmentation processes can have their origin at the global minimum, similar fragmentations involving low-lying conformers, both zwitterionic and nonzwitterionic, compete and should be considered to account for the observed reactivity. We have also found that in some specific cases post-transition state dynamics similar to the ones described before in the literature for formamide-Ca2+ reactions, may also play a role.
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Affiliation(s)
- Al Mokhtar Lamsabhi
- Departamento de Química, Módulo 13, Facultad de Ciencias and Institute of Advanced Chemical Sciences (IadChem) , Universidad Autónoma de Madrid , Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid , Spain
| | - Otilia Mó
- Departamento de Química, Módulo 13, Facultad de Ciencias and Institute of Advanced Chemical Sciences (IadChem) , Universidad Autónoma de Madrid , Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid , Spain
| | - Manuel Yáñez
- Departamento de Química, Módulo 13, Facultad de Ciencias and Institute of Advanced Chemical Sciences (IadChem) , Universidad Autónoma de Madrid , Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid , Spain
| | - Jean-Yves Salpin
- LAMBE, Univ Evry, CNRS, CEA , Université Paris-Saclay , F-91025 Evry-Courcouronnes , France.,LAMBE, UCP , Université Paris-Seine , F-91025 Evry-Courcouronnes , France
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3
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Abtouche S, Issad-Elkebich M, Brahimi M, Assfeld X. Complexation of Ca2+ cation by the lateral chain of Paclitaxel (N-Benzoyl-ß-phenylisoserine): A theoretical study. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Lu L, Fan J, Lei W, Ouyang Y, Yao D, Xia X, Hao Q. Multiple Metal (Cu, Mn, Fe) Centered Species Simultaneously Combined Nitrogen-doped Graphene as an Electrocatalyst for Oxygen Reduction in Alkaline and Neutral Solutions. ChemCatChem 2018. [DOI: 10.1002/cctc.201800152] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Lei Lu
- Key Laboratory for Soft Chemistry and Functional Materials; School of Chemical Engineering; Nanjing University of Science and Technology; Nanjing 210094 P.R. China
| | - Jiawei Fan
- Key Laboratory for Soft Chemistry and Functional Materials; School of Chemical Engineering; Nanjing University of Science and Technology; Nanjing 210094 P.R. China
| | - Wu Lei
- Key Laboratory for Soft Chemistry and Functional Materials; School of Chemical Engineering; Nanjing University of Science and Technology; Nanjing 210094 P.R. China
| | - Yu Ouyang
- Key Laboratory for Soft Chemistry and Functional Materials; School of Chemical Engineering; Nanjing University of Science and Technology; Nanjing 210094 P.R. China
| | - Di Yao
- Key Laboratory for Soft Chemistry and Functional Materials; School of Chemical Engineering; Nanjing University of Science and Technology; Nanjing 210094 P.R. China
| | - Xifeng Xia
- Key Laboratory for Soft Chemistry and Functional Materials; School of Chemical Engineering; Nanjing University of Science and Technology; Nanjing 210094 P.R. China
| | - Qingli Hao
- Key Laboratory for Soft Chemistry and Functional Materials; School of Chemical Engineering; Nanjing University of Science and Technology; Nanjing 210094 P.R. China
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5
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Quattrociocchi DSG, de M. Carneiro JW, Ferreira GB, Stoyanov SR, Damasceno RN, da Costa LM. Design of Molecular Building Blocks for the Development of Nickel(II)-Chelating Agents. ChemistrySelect 2017. [DOI: 10.1002/slct.201700529] [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]
Affiliation(s)
- Daniel S. G. Quattrociocchi
- Programa de Pós-graduação em Química; Departamento de Química Orgânica e Inorgânica; Universidade Federal Fluminense, Outeiro de São João Batista, s/n; 24020-141 Niterói - RJ Brazil
| | - José Walkimar de M. Carneiro
- Programa de Pós-graduação em Química; Departamento de Química Orgânica e Inorgânica; Universidade Federal Fluminense, Outeiro de São João Batista, s/n; 24020-141 Niterói - RJ Brazil
| | - Glaucio B. Ferreira
- Programa de Pós-graduação em Química; Departamento de Química Orgânica e Inorgânica; Universidade Federal Fluminense, Outeiro de São João Batista, s/n; 24020-141 Niterói - RJ Brazil
| | - Stanislav R. Stoyanov
- CanmetENERGY-Devon; Natural Resources Canada; 1 Oil Patch Drive Devon, Alberta T9G 1 A8, Canada
- Departament of Chemical and Materials Engineering; University of Alberta; Edmonton, Alberta T6G 2 V4 Canada
| | - Raimundo N. Damasceno
- Núcleo de Estudos em Biomassa e Gerenciamento de Águas (NAB); Universidade Federal Fluminense; Rua Passo da Pátria, 156 24210-346 Niterói - RJ Brazil
| | - Leonardo M. da Costa
- Programa de Pós-graduação em Química; Departamento de Química Orgânica e Inorgânica; Universidade Federal Fluminense, Outeiro de São João Batista, s/n; 24020-141 Niterói - RJ Brazil
- Núcleo de Estudos em Biomassa e Gerenciamento de Águas (NAB); Universidade Federal Fluminense; Rua Passo da Pátria, 156 24210-346 Niterói - RJ Brazil
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Quattrociocchi DGS, Ferreira GB, da Costa LM, Carneiro JWDM. DFT studies of the interactions between the [Ca(H 2 O) 5 ] 2+ cation and monofunctional oxo, aza, sulfur and phosphorous ligands. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2015.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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Brea O, Yáñez M, Mó O, Lamsabhi AM. Why Is the Spontaneous Deprotonation of [Cu(uracil)2]2+Complexes Accompanied by Enolization of the System? Chemphyschem 2015; 16:2375-82. [DOI: 10.1002/cphc.201500262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Indexed: 11/10/2022]
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8
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Siddiqui SA, Rasheed T, Bouarissa N, Al-Hajry A. Possible use of BN-modified fullerene as a nano-biosensor to detect adenine–thymine Watson–Crick base pair in mutagenic tautomeric form: Theoretical approach. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2015. [DOI: 10.1142/s0219633615500030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
The present work deals with the theoretical investigation of electronic structure features and stability of adenine–thymine (AT) and rare tautomer of adenine–thymine (rAT) base pairs along with their complexes with Cu 2+ cation and their interactions with BN doped fullerene ( C 58 BN ). All the calculations have been performed with density functional theory using B3LYP functional. Electronic structures of the two base pairs are almost identical. Hence, it is rather difficult to distinguish between the two base pairs on the basis of their electronic properties. As per our theoretical calculations, we have observed that, BN modified fullerene could act as a nano-biosensor for detection of mispairing between these two complementary bases as well as their Cu 2+ complexes.
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Affiliation(s)
- Shamoon Ahmad Siddiqui
- Promising Centre for Sensors and Electronic Devices, Najran University, Najran, KSA
- Department of Physics, College of Arts and Science, Najran University, Najran, KSA
| | - Tabish Rasheed
- Department of Applied Sciences, School of Engineering and Technology, Sharda University, Plot No. 32–34, Knowledge Park III, Greater Noida, N.C.R., U.P., India-201306, India
| | - Nadir Bouarissa
- Department of Physics, Faculty of Science, University of M'sila, 28000 M'sila, Algeria
| | - A. Al-Hajry
- Promising Centre for Sensors and Electronic Devices, Najran University, Najran, KSA
- Department of Physics, College of Arts and Science, Najran University, Najran, KSA
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9
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Siddiqui SA, Bouarissa N, Rasheed T, Al-Hajry A. Quantum chemical investigations of AlN-doped C60 for use as a nano-biosensor in detection of mispairing between DNA bases. J Biosci 2014; 39:761-9. [PMID: 25431406 DOI: 10.1007/s12038-014-9475-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Quantum chemical calculations were carried out to study the electronic structure and stability of adenine-thymine and the rare tautomer of adenine-thymine base pairs along with their Cu 2+ complexes and their interactions with AlN-modified fullerene (C58AlN) using Density Functional Theory (B3LYP method). Since, these two forms of base pairs and their Cu 2+ complexes have almost similar electronic structures, their chemical differentiation is an extremely difficult task. In this investigation, we have observed that AlN-doped C 60 could be used as a potentially viable nanoscale sensor to detect these two base pairs as well as their Cu2+ complexes.
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Affiliation(s)
- Shamoon Ahmad Siddiqui
- Promising Centre for Sensors and Electronic Devices, College of Arts and Science, Najran University, Najran, KSA
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10
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Liu H, Bara JE, Turner CH. Tuning the Adsorption Interactions of Imidazole Derivatives with Specific Metal Cations. J Phys Chem A 2014; 118:3944-51. [DOI: 10.1021/jp502222z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Haining Liu
- Department of Chemical and
Biological Engineering, The University of Alabama, Box 870203, Tuscaloosa, Alabama 35487-0203, United States
| | - Jason E. Bara
- Department of Chemical and
Biological Engineering, The University of Alabama, Box 870203, Tuscaloosa, Alabama 35487-0203, United States
| | - C. Heath Turner
- Department of Chemical and
Biological Engineering, The University of Alabama, Box 870203, Tuscaloosa, Alabama 35487-0203, United States
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11
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Wang C, Li Q, Wang F, Xia G, Liu R, Li D, Li N, Spendelow JS, Wu G. Morphology-dependent performance of CuO anodes via facile and controllable synthesis for lithium-ion batteries. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1243-1250. [PMID: 24377276 DOI: 10.1021/am405061c] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanostructured CuO anode materials with controllable morphologies have been successfully synthesized via a facile and environmentally friendly approach in the absence of any toxic surfactants or templates. In particular, leaf-like CuO, oatmeal-like CuO, and hollow-spherical CuO were obtained by changing the ligand agents. The structures and electrochemical performance of these as-prepared CuO were fully characterized by various techniques, and the properties were found to be strongly dependent on morphology. As anode materials for lithium-ion batteries, the leaf-like CuO and oatmeal-like CuO electrodes exhibit relatively high reversible capacities, whereas hollow-spherical CuO shows enhanced reversible capacity after initial degradation. Furthermore, an excellent high rate capability was obtained for the leaf-like CuO and hollow-spherical CuO electrodes. These results may provide valuable insights for the development of nanostructured anodes for next-generation high-performance lithium-ion batteries.
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Affiliation(s)
- Chen Wang
- School of Chemical Engineering and Technology, Harbin Institute of Technology , Harbin 150001, China
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12
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da Costa LM, Ferreira GB, de M. Carneiro JW. DFT studies of imino and thiocarbonyl ligands with the pentaaqua Mg2+ cation: affinity and associated parameters. J Mol Model 2013; 19:2669-77. [PMID: 23532459 DOI: 10.1007/s00894-013-1811-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 02/20/2013] [Indexed: 02/04/2023]
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13
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Eizaguirre A, Mó O, Yáñez M, Tortajada J, Salpin JY. Unimolecular reactivity of the [urea-Sr]2+ complex, a metastable dication in the gas phase: an experimental and theoretical perspective. J Phys Chem B 2013; 117:2088-95. [PMID: 23343443 DOI: 10.1021/jp312466t] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The interactions between urea and Sr(2+) in the gas phase have been investigated by combining electrospray ionization/mass spectrometry techniques and density functional and high-level ab initio molecular orbital calculations. Our theoretical survey indicates that [Sr(urea)](2+) adducts are thermodynamically stable with respect to direct Coulomb explosions. However, after isomerization, some of the local minima of the PES are thermodynamically unstable with respect to the formation of NH(4)(+), but kinetically metastable. The loss of neutral fragments with the concomitant generation of lighter doubly charged fragment ions, namely, [(H(3)N)Sr](2+) and [(HNCO)]Sr(2+), compete with the aforementioned Coulomb explosion processes yielding NH(4)(+) + [(NCO)Sr](+) and [(H(2)N)Sr](+) + [H(2)NCO](+), although the former processes dominate. Hence, both singly and doubly charged species are detected as dissociation products. Quite importantly, the observed eliminations of NH(3) or HNCO lead to the formation of new doubly charged species, which turn out to be thermodynamically stable.
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Affiliation(s)
- Ane Eizaguirre
- Departamento de Química, Módulo 13, Facultad de Ciencias, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco 28049, Madrid, Spain
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14
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Brea O, Yáñez M, Mó O, Lamsabhi AM. On the stability of [(uracil)2-Cu]2+ complexes in the gas phase. Different pathways for the formation of [(uracil-H)(uracil)-Cu]+ monocations. Org Biomol Chem 2013; 11:3862-70. [DOI: 10.1039/c3ob40450a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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da Costa LM, Amorim RM, de Macedo Cruz MT, de M. Carneiro JW. Density Functional Theory studies on interactions of phosphoryl ligands with a pentaaqua Ca2+ complex: Bond interaction analysis. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Interaction of adenine Cu(II) complexes with BN-doped fullerene differentiates electronically equivalent tautomers. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.04.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Moreira da Costa L, Stoyanov SR, Walkimar de M. Carneiro J. Interaction between alkaline earth cations and oxo ligands: a DFT study of the affinity of Mg2+ for carbonyl ligands. J Mol Model 2012; 18:4389-96. [DOI: 10.1007/s00894-012-1448-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Accepted: 04/23/2012] [Indexed: 10/28/2022]
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18
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Vessecchi R, Tomaz JC, dos Santos GP, de Oliveira ARM, Lopes NP, Clososki GC. Gas-phase reactivity of protonated 2-oxazoline derivatives: mass spectrometry and computational studies. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2012; 26:1061-1069. [PMID: 22467456 DOI: 10.1002/rcm.6182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
RATIONALE Oxazolines have attracted the attention of researchers worldwide due to their versatility as carboxylic acid protecting groups, chiral auxiliaries, and ligands for asymmetric catalysis. Electrospray ionization tandem mass spectrometric (ESI-MS/MS) analysis of five 2-oxazoline derivatives has been conducted, in order to understand the influence of the side chain on the gas-phase dissociation of these protonated compounds under collision-induced dissociation (CID) conditions. METHODS Mass spectrometric analyses were conducted in a quadrupole time-of-flight (Q-TOF) spectrometer fitted with electrospray ionization source. Protonation sites have been proposed on the basis of the gas-phase basicity, proton affinity, atomic charges, and a molecular electrostatic potential map obtained on the basis of the quantum chemistry calculations at the B3LYP/6-31 + G(d,p) and G2(MP2) levels. RESULTS Analysis of the atomic charges, gas-phase basicity and proton affinities values indicates that the nitrogen atom is a possible proton acceptor site. On the basis of these results, two main fragmentation processes have been suggested: one taking place via neutral elimination of the oxazoline moiety (99 u) and another occurring by sequential elimination of neutral fragments with 72 u and 27 u. These processes should lead to formation of R(+). CONCLUSIONS The ESI-MS/MS experiments have shown that the side chain could affect the dissociation mechanism of protonated 2-oxazoline derivatives. For the compound that exhibits a hydroxyl at the lateral chain, water loss has been suggested to happen through an E2-type elimination, in an exothermic step.
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Affiliation(s)
- Ricardo Vessecchi
- Núcleo de Pesquisa em Produtos Naturais e Sintéticos, Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil.
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A quantum-chemical study of the binding ability of βXaaHisGlyHis towards copper(II) ion. J Mol Model 2012; 18:1365-74. [PMID: 21761180 PMCID: PMC3313029 DOI: 10.1007/s00894-011-1162-9] [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: 02/16/2011] [Accepted: 06/24/2011] [Indexed: 11/30/2022]
Abstract
The present study analyzed binding of Cu2+ to tetrapeptides in water solution at several levels of theoretical approximation. The methods used to study the energetic and structural properties of the complexes in question include semiempirical hamiltonians, density functional theory as well as ab initio approaches including electron correlation effects. In order to shed light on the character of interactions between Cu2+ and peptides, which are expected to be mainly electrostatic in nature, decomposition of interaction energy into physically meaningful components was applied.
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20
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Eizaguirre A, Mó O, Yáñez M, Salpin JY. Modeling the interactions between peptide functions and Sr2+: formamide-Sr2+ reactions in the gas phase. Phys Chem Chem Phys 2011; 13:18409-17. [PMID: 21901223 DOI: 10.1039/c1cp21578g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interactions between formamide, which can be considered a prototype of a peptide function, and Sr(2+) have been investigated by combining nanoelectrospray ionization/mass spectrometry techniques and G96LYP DFT calculations. For Sr an extended LANL2DZ basis set was employed, together with a 6-311+G(3df,2p) basis set expansion for the remaining atoms of the system. The observed reactivity seems to be dominated by the Coulomb explosion process yielding [SrOH](+) + [HNCH](+), which are the most intense peaks in the MS/MS spectra. Nevertheless, additional peaks corresponding to the loss of HNC and CO indicate that the association of Sr(2+) to water or to ammonia leads to long-lived doubly charged species detectable in the timescale of these experimental techniques. The topology of the calculated potential energy surface permits us to establish the mechanisms behind these processes. Although the interaction between the neutral base and Sr(2+) is essentially electrostatic, the polarization triggered by the doubly charged metal ion results in the activation of several bonds, and favors different proton transfer mechanisms required for the formation of the [SrOH](+), [SrOH(2)](2+) and [SrNH(3)](2+) products.
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Affiliation(s)
- Ane Eizaguirre
- Departamento de Química, Módulo 13, Facultad de Ciencias, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049, Madrid, Spain
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Demir D, Gençer N, Arslan O, Genç H, Zengin M. In vitro inhibition of polyphenol oxidase by some new diarylureas. J Enzyme Inhib Med Chem 2011; 27:125-31. [DOI: 10.3109/14756366.2011.580743] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Dudu Demir
- Department of Chemistry, Balikesir University,
Balikesir, Turkey
| | - Nahit Gençer
- Department of Chemistry, Balikesir University,
Balikesir, Turkey
| | - Oktay Arslan
- Department of Chemistry, Balikesir University,
Balikesir, Turkey
| | - Hayriye Genç
- Department of Chemistry, Sakarya University,
Adapazari, Turkey
| | - Mustafa Zengin
- Department of Chemistry, Sakarya University,
Adapazari, Turkey
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Corral I, Yáñez M. [MLn]2+ doubly charged systems: modeling, bonding, life times and unimolecular reactivity. Phys Chem Chem Phys 2011; 13:14848-64. [DOI: 10.1039/c1cp20622b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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23
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Shankar R, Kolandaivel P, Senthilkumar L. Interaction studies of cysteine with Li+, Na+, K+, Be2+, Mg2+, and Ca2+ metal cation complexes. J PHYS ORG CHEM 2010. [DOI: 10.1002/poc.1786] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lamsabhi AM, Mó O, Yáñez M. Serine–Ca2+ versus serine–Cu2+ complexes — A theoretical perspective. CAN J CHEM 2010. [DOI: 10.1139/v10-038] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The association of Ca2+ and Cu2+ to serine was investigated by means of B3LYP DFT calculations. The [serine–M]2+ (M = Ca, Cu) potential energy surfaces include, as does the neutral serine, a large number of conformers, in which a drastic reorganization of the electron density of the serine moiety is observed. This leads to significant changes in the number and strength of the intramolecular hydrogen bonds existing in the neutral serine tautomers. In some cases, a proton is transferred from the carboxylic OH group to the amino group and accordingly, some of the more stable [serine–M]2+ complexes can be viewed as the result of the interaction of the zwiterionic form of serine with the doubly charged metal ion. Whereas the interaction between Ca2+ and serine is essentially electrostatic, that between Cu2+ and serine has a non-negligible covalent character, reflected in larger electron densities at the bond critical points between the metal and the base, in the negative values of the electron density between the two interacting systems, and in much larger Cu2+ than Ca2+ binding energies. More importantly, the interaction with Cu2+ is followed by a partial oxidation of the base, which is not observed when the metal ion is Ca2+. The main consequence is that in Cu2+ complexes a significant acidity enhancement of the serine moiety takes place, which strongly favors the deprotonation of the [serine–Cu]2+ complexes. This is not the case for Ca2+ complexes. Thus, [serine–Ca]2+ complexes, like those formed by urea, thiourea, selenourea, or glycine, should be detected in the gas phase. Conversely, the complexes with Cu2+ should deprotonate spontaneously and therefore only [(serine–H)–Cu]+ monocations should be experimentally accessible.
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Affiliation(s)
- Al Mokhtar Lamsabhi
- Departamento de Química, C-9. Universidad Autónoma de Madrid. (Campus de Excelencia UAM-CSIC). Cantoblanco, 28049-Madrid, Spain
| | - Otilia Mó
- Departamento de Química, C-9. Universidad Autónoma de Madrid. (Campus de Excelencia UAM-CSIC). Cantoblanco, 28049-Madrid, Spain
| | - Manuel Yáñez
- Departamento de Química, C-9. Universidad Autónoma de Madrid. (Campus de Excelencia UAM-CSIC). Cantoblanco, 28049-Madrid, Spain
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Electronic structure and vibrational frequencies in dehydroacetic acid (DHA) transition-metal complexes: A DFT study. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.theochem.2010.01.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Safi ZS, Lamsabhi AM. A theoretical density functional study of association of Zn2+with oxazolidine and its thio derivatives in the gas phase. J PHYS ORG CHEM 2010. [DOI: 10.1002/poc.1648] [Citation(s) in RCA: 1] [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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Georgieva I, Trendafilova N, Creaven BS, Walsh M, Noble A, McCann M. Is the CO frequency shift a reliable indicator of coumarin binding to metal ions through the carbonyl oxygen? Chem Phys 2009. [DOI: 10.1016/j.chemphys.2009.10.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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da Costa LM, Carneiro JWDM, Paes LWC, Romeiro GA. Density Functional Theory studies on interactions of phosphoryl ligands with the Ca2+ cation: Affinity and associated parameters. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.06.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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