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Khodabandeh MH, Reisi H, Davari MD, Zare K, Zahedi M, Ohanessian G. Interaction Modes and Absolute Affinities of α-Amino Acids for Mn2+: A Comprehensive Picture. Chemphyschem 2013; 14:1733-45. [DOI: 10.1002/cphc.201200964] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 02/13/2013] [Indexed: 11/07/2022]
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2
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Nyadong L, Inutan ED, Wang X, Hendrickson CL, Trimpin S, Marshall AG. Laserspray and matrix-assisted ionization inlet coupled to high-field FT-ICR mass spectrometry for peptide and protein analysis. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:320-8. [PMID: 23381687 DOI: 10.1007/s13361-012-0545-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Revised: 11/17/2012] [Accepted: 11/19/2012] [Indexed: 05/25/2023]
Abstract
We present the first coupling of laser spray ionization inlet (LSII) and matrix assisted ionization inlet (MAII) to high-field Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) for generation of electrospray-like ions to take advantage of increased sensitivity, mass range, and mass resolving power afforded by multiple charging. We apply the technique to top-down protein analysis and characterization of metalloproteins. We also present a novel method for generation of multiply-charged copper-peptide complexes with varying degrees of copper adduction by LSII. We show an application of the generated copper-peptide complexes for protein charge state and molecular weight determination, particularly useful for an instrument such as a linear ion trap mass analyzer.
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Affiliation(s)
- Leonard Nyadong
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
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3
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Shoeib T, Zhao J, Ei Aribi H, Hopkinson AC, Siu KWM. Dissociations of complexes between monovalent metal ions and aromatic amino acid or histidine. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:38-48. [PMID: 23238948 DOI: 10.1007/s13361-012-0511-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 10/02/2012] [Accepted: 10/02/2012] [Indexed: 06/01/2023]
Abstract
The fragmentations of [AA + M](+) complexes, where AA = Phe, Tyr, Trp, or His, and M is a monovalent metal (Li, Na, or Ag), have been exhaustively studied through collision-induced dissociation (CID) and through deuterium labeling. Dissociations of the Li- and Ag-containing complexes gave a large number of fragment ions; by contrast, the sodium/amino acid complexes have lower binding energies, and dissociation resulted in much simpler spectra, with loss of the entire ligand dominating. Unambiguous assignments of these fragment ions were made and formation mechanisms are proposed. Of particular interest are fragmentations in which the charge was retained on the organic fragment and the metal was lost, either as a metal hydride (AgH) or hydroxide (LiOH) or as the silver atom (Ag(•)).
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Affiliation(s)
- Tamer Shoeib
- Department of Chemistry, The American University in Cairo, New Cairo, Egypt
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4
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Watson HM, Vincent JB, Cassady CJ. Effects of transition metal ion coordination on the collision-induced dissociation of polyalanines. JOURNAL OF MASS SPECTROMETRY : JMS 2011; 46:1099-1107. [PMID: 22124980 DOI: 10.1002/jms.1992] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Transition metal-polyalanine complexes were analyzed in a high-capacity quadrupole ion trap after electrospray ionization. Polyalanines have no polar amino acid side chains to coordinate metal ions, thus allowing the effects metal ion interaction with the peptide backbone to be explored. Positive mode mass spectra produced from peptides mixed with salts of the first row transition metals Cr(III), Fe(II), Fe(III), Co(II), Ni(II), Cu(I), and Cu(II) yield singly and doubly charged metallated ions. These precursor ions undergo collision-induced dissociation (CID) to give almost exclusively metallated N-terminal product ions whose types and relative abundances depend on the identity of the transition metal. For example, Cr(III)-cationized peptides yield CID spectra that are complex and have several neutral losses, whereas Fe(III)-cationized peptides dissociate to give intense non-metallated products. The addition of Cu(II) shows the most promise for sequencing. Spectra obtained from the CID of singly and doubly charged Cu-heptaalanine ions, [M + Cu - H](+) and [M + Cu](2+) , are complimentary and together provide cleavage at every residue and no neutral losses. (This contrasts with [M + H](+) of heptaalanine, where CID does not provide backbone ions to sequence the first three residues.) Transition metal cationization produces abundant metallated a-ions by CID, unlike protonated peptides that produce primarily b- and y-ions. The prominence of metallated a-ions is interesting because they do not always form from b-ions. Tandem mass spectrometry on metallated (Met = metal) a- and b-ions indicate that [b(n) + Met - H](2+) lose CO to form [a(n) + Met - H](2+), mimicking protonated structures. In contrast, [a(n) + Met - H](2+) eliminate an amino acid residue to form [a(n-1) + Met - H](2+), which may be useful in sequencing.
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Affiliation(s)
- Heather M Watson
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL, USA
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5
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Constantino E, Tortajada J, Sodupe M, Rodríguez-Santiago L. Coordination Properties of Lysine Interacting with Co(I) and Co(II). A Theoretical and Mass Spectrometry Study. J Phys Chem A 2008; 112:12385-92. [DOI: 10.1021/jp805764y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- E. Constantino
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain, and Laboratoire Analyse et Modélisation pour l’Analyse et l’Environnement, CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Boulevard François Mitterrand, 91025 Evry Cedex, France
| | - J. Tortajada
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain, and Laboratoire Analyse et Modélisation pour l’Analyse et l’Environnement, CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Boulevard François Mitterrand, 91025 Evry Cedex, France
| | - M. Sodupe
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain, and Laboratoire Analyse et Modélisation pour l’Analyse et l’Environnement, CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Boulevard François Mitterrand, 91025 Evry Cedex, France
| | - L. Rodríguez-Santiago
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain, and Laboratoire Analyse et Modélisation pour l’Analyse et l’Environnement, CNRS UMR 8587, Université d’Evry-Val-d’Essonne, Boulevard François Mitterrand, 91025 Evry Cedex, France
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6
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Pu D, Vincent JB, Cassady CJ. The effects of chromium(III) coordination on the dissociation of acidic peptides. JOURNAL OF MASS SPECTROMETRY : JMS 2008; 43:773-781. [PMID: 18205239 DOI: 10.1002/jms.1374] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The complexes formed between chromium(III) and synthetic acidic peptides were studied by sustained off-resonance irradiation collision-induced dissociation (SORI-CID) in a Fourier transform ion-cyclotron resonance (FT-ICR) mass spectrometer equipped with electrospray ionization (ESI). Neutral peptides and peptides containing one, two, and multiple acidic residues were studied. Formation of [M + Cr-2H]+ occurred for all peptides. Three noteworthy features were found in the CID spectra of [M + Cr-2H]+. The first is that fewer fragment ions were produced from [M + Cr-2H]+ than from [M + H]+. The reason may be that multiple coordination between chromium(III) and carboxylate or carbonyl groups hinders the production of fragment ions by continuing to bind pieces of the peptide to chromium(III) after cleavage of bonds within the peptide. The second feature is loss of CO from [M + Cr-2H]+ and [y(n) + Cr-H]+. A mechanism involving coordination of chromium(III) with carboxylate groups is proposed to rationalize elimination of CO. The third feature is that chromium(III) is retained in all fragment ions, indicating strong binding of the metal ion to the peptides. The complex [M + 2Cr-5H]+ is formed as the peptide chain length and number of acidic residues increases. Longer peptides have more sites to coordinate with chromium(III) and more conformational flexibility. In addition, formation of [M + Cr-2H]+ from AGGAAAA-OCH(3), which has no carboxylic acid groups, suggests that chromium(III) can coordinate with sites on the peptide backbone, albeit in low abundance. In the negative mode, [M + Cr-4H](-) was only found for peptides containing four or more carboxylic acid groups. This is consistent with deprotonated carboxylic acid groups being involved in chromium(III) coordination and with chromium existing in the 3 + state in the gas-phase ions.
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Affiliation(s)
- Dan Pu
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487-0336, USA
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7
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Prudent M, Girault HH. On-line electrogeneration of copper-peptide complexes in microspray mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:560-568. [PMID: 18313328 DOI: 10.1016/j.jasms.2008.01.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2007] [Revised: 01/07/2008] [Accepted: 01/22/2008] [Indexed: 05/26/2023]
Abstract
The interaction of copper ions with peptides was investigated by electrospray mass spectrometry. Two electrospray micro-emitters were compared, the first one with a platinum electrode using a copper(II) electrolyte solution containing a peptide sample, and the second one with a sacrificial copper anode in a water/methanol solution containing only a peptide (i.e., angiotensin III, bradykinin, or Leu-enkephalin). The former yielded mainly Cu(2+) complexes either with histidine residues or with the peptide backbone (Cu(+) complexes can be also formed due to gas-phase reactions), whereas the latter can generate a mixture of both Cu(+) and Cu(2+) aqueous complexes that yield different complexation patterns. This study shows that electrospray emitters with soluble copper anodes enable the study of Cu(I)-peptide complexes in solution.
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Affiliation(s)
- Michel Prudent
- Laboratoire d'Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
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8
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Tanaka K, Kageyama C, Fukase K. Acceleration of Cu(I)-mediated Huisgen 1,3-dipolar cycloaddition by histidine derivatives. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.07.055] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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E. Rezabal,*, Marino T, Mercero JM, Russo N, Ugalde JM. Assessment of Approximate Density Functional Methods for the Study of the Interactions of Al(III) with Aromatic Amino Acids. J Chem Theory Comput 2007; 3:1830-6. [DOI: 10.1021/ct700027n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. Rezabal,*
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain, and Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite - Centro d'Eccellenza MIUR, Universitá della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - T. Marino
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain, and Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite - Centro d'Eccellenza MIUR, Universitá della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - J. M. Mercero
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain, and Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite - Centro d'Eccellenza MIUR, Universitá della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - N. Russo
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain, and Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite - Centro d'Eccellenza MIUR, Universitá della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - J. M. Ugalde
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain, and Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite - Centro d'Eccellenza MIUR, Universitá della Calabria, I-87030 Arcavacata di Rende (CS), Italy
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10
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Mó O, Yáñez M, Salpin JY, Tortajada J. Thermochemistry, bonding, and reactivity of Ni+ and Ni2+ in the gas phase. MASS SPECTROMETRY REVIEWS 2007; 26:474-516. [PMID: 17492664 DOI: 10.1002/mas.20134] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In this review, we present a general overview on the studies carried out on Ni(+-)- and Ni(2+)-containing systems in the gas phase since 1996. We have focused our attention in the determination of binding energies in parallel with an analysis of the structure and bonding of the complexes formed by the interaction of Ni(+) with one ligand, or in clusters where this metal ion binds several identical or different ligands. Solvation of Ni(2+) by different ligands is also discussed, together with the theoretical information available of doubly charged Ni-containing species. The final section of this review is devoted to an analysis of the gas-phase uni- and bimolecular reactivity of Ni(+) and Ni(2+) complexes.
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Affiliation(s)
- Otilia Mó
- Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
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11
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Rimola A, Rodríguez-Santiago L, Sodupe M. Cation−π Interactions and Oxidative Effects on Cu+ and Cu2+ Binding to Phe, Tyr, Trp, and His Amino Acids in the Gas Phase. Insights from First-Principles Calculations. J Phys Chem B 2006; 110:24189-99. [PMID: 17125391 DOI: 10.1021/jp064957l] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The coordination properties of the four natural aromatic amino acids (AA(arom) = Phe, Tyr, Trp, and His) to Cu+ and Cu2+ have been exhaustively studied by means of ab initio calculations. For Cu+-Phe, Cu+-Tyr and Cu+-Trp, the two charge solvated tridentate N/O/ring and bidentate N/ring structures, with the metal cation interacting with the pi system of the ring, were found to be the lowest ones, relative DeltaG(298K) energies being less than 0.5 kcal/mol. The Cu+-His ground-state structure has the metal cation interacting with the NH2 group and the imidazole N. For these low-lying structures vibrational features are also discussed. Unlike Cu+ complexes, the ground-state structure of Cu2+-Phe, Cu2+-Tyr, and Cu2+-Trp does not present cation-pi interactions due to the oxidation of the aromatic ring induced by the metal cation. The ground-state structure of Cu2+-His does not present oxidation of the amino acid, the coordination to Cu2+ being tridentate with the oxygen of the carbonyl group, the nitrogen of the amine, and the N of the imidazole. Other less stable isomers, however, show oxidation of His, particularly of the imidazole ring, which can induce spontaneous proton-transfer reactions from the NH of the imidazole to the NH2 of the backbone. Finally, the computed binding energies for Cu+-AA(arom) and Cu2+-AA(arom) systems have been computed, the order found for the single charged systems being Cu+-His > Cu+-Trp > Cu+-Tyr > Cu+-Phe, in very good agreement with the experimental data.
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Affiliation(s)
- Albert Rimola
- Departament de Química, Universitat Autonoma de Barcelona, Bellaterra 08193, Spain
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12
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Coletti C, Re N. Theoretical Study of Alkali Cation−Benzene Complexes: Potential Energy Surfaces and Binding Energies with Improved Results for Rubidium and Cesium. J Phys Chem A 2006; 110:6563-70. [PMID: 16706415 DOI: 10.1021/jp060771a] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High level ab initio quantum chemical calculations have been carried out on the binding of alkali metal to benzene with special attention to heavier metals for which the agreement between the most recent theoretical investigations and the experimental bond dissociation energies (BDEs) is not very good. We performed BSSE-corrected geometry optimizations employing the MP2 level of theory with large basis sets and a modified Stuttgart RSC 1997 basis set for rubidium and cesium and carried out single point energy calculations at the MP4 level, obtaining, also for the latter metals, BDE values in good agreement with the experimental results. Furthermore, in view of the development of empirical correction terms to force fields to describe cation-pi interactions, we evaluated the potential energy surface along the benzene symmetry axis and discussed the role of the BSSE correction on the accuracy of our results.
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Affiliation(s)
- Cecilia Coletti
- Dipartimento di Scienze del Farmaco, Università G. d'Annunzio, Via dei Vestini 31, 66100 Chieti, Italy
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13
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Morgan JW, Russell DH. Comparative studies of 193-nm photodissociation and TOF-TOFMS analysis of bradykinin analogues: the effects of charge site(s) and fragmentation timescales. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2006; 17:721-9. [PMID: 16540342 DOI: 10.1016/j.jasms.2006.02.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2005] [Revised: 01/31/2006] [Accepted: 02/01/2006] [Indexed: 05/07/2023]
Abstract
The dissociation reactions of [M + H]+, [M + Na]+, and [M + Cu]+ ions of bradykinin (amino acid sequence RPPGFSPFR) and three bradykinin analogues (RPPGF, RPPGFSPF, PPGFSPFR) are examined by using 193-nm photodissociation and post-source decay (PSD) TOF-TOF-MS techniques. The photodissociation apparatus is equipped with a biased activation cell, which allows us to detect fragment ions that are formed by dissociation of short-lived (<1 mus) photo-excited ions. In our previously reported photodissociation studies, the fragment ions were formed from ions dissociating with lifetimes that exceeded 10 mus; thus these earlier photofragment ion spectra and post-source decay (PSD) spectra [composite of both metastable ion (MI) and collision-induced dissociation (CID)] were quite similar. On the other hand, short-lived photo-excited ions dissociate by simple bond cleavage reactions and other high-energy dissociation channels. We also show that product ion types and abundances vary with the location of the charge on the peptide ion. For example, H+ and Na+ cations can bind to multiple polar functional groups (basic amino acid side chains) of the peptide, whereas Cu+ ions preferentially bind to the guanidino group of the arginine side-chain and the N-terminal amine group. Furthermore, when Cu+ is the charge carrier, the abundances of non-sequence informative ions, especially loss of small neutral molecules (H2O and NH3) is decreased for both photofragment ion and PSD spectra relative to that observed for [M + H]+ and [M + Na]+ peptide ions.
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Affiliation(s)
- Joseph W Morgan
- Laboratory for Biological Mass Spectrometry, Department of Chemistry, Texas A and M University, College Station, Texas, USA
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14
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Moore DT, Oomens J, Eyler JR, von Helden G, Meijer G, Dunbar RC. Infrared Spectroscopy of Gas-Phase Cr+ Coordination Complexes: Determination of Binding Sites and Electronic States. J Am Chem Soc 2005; 127:7243-54. [PMID: 15884966 DOI: 10.1021/ja042431d] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Infrared spectra were recorded for a series of gas-phase Cr+ complexes using infrared multiphoton dissociation (IRMPD) in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. The functionalized aromatic ligands (acetophenone, anisole, aniline, and dimethyl aniline) offer a choice of either aromatic ring-pi or n-donor-base binding sites. Use of the FELIX free electron laser light source allowed convenient, rapid scanning of the chemically informative wavelength range from approximately 500 to 1800 cm(-1), which in many cases characterized the preferred site of metal binding, as well as the electronic spin state of the complex. Mono-complex ions, Cr+(ligand), for anisole, aniline, and dimethyl aniline and bis-complex ions, Cr+(ligand)(2), for anisole, aniline, and acetophenone were produced by ligand attachment to laser-desorbed Cr+ ions in the FT-ICR cell. The photodissociation yields plotted as a function of wavelength were interpreted as approximations to the infrared absorption spectra and were compared with computed spectra of different possible geometries and spin states. Clear-cut diagnostic features in the spectra of the acetophenone, anisole, and aniline complexes showed the sites of Cr+ attachment to be the carbonyl oxygen site for acetophenone (bis-complex) and the ring-pi site for anisole and aniline (both mono- and bis-complexes). The bis-complexes of aniline and anisole are low-spin (probably doublet) states, while the mono-complexes of these same ligands are high-spin (sextet) states. The dimethyl aniline complex gave a cluttered spectrum in poor agreement with calculations, which may reflect a mixture of binding-site isomers in this case.
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Affiliation(s)
- David T Moore
- FOM Institute for Plasma Physics "Rijnhuizen", Postbus 1207, 3430 BE Nieuwegein, The Netherlands
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15
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Constantino E, Rodríguez-Santiago L, Sodupe M, Tortajada J. Interaction of Co+ and Co2+ with Glycine. A Theoretical Study. J Phys Chem A 2004; 109:224-30. [PMID: 16839110 DOI: 10.1021/jp047590y] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cobalt cations are open shell systems with several possible electronic states arising from the different occupations of the 3d and 4s orbitals. The influence of these occupations on the relative stability of the coordination modes of the metal cation to glycine has been studied by means of theoretical methods. The structure and vibrational frequencies have been determined using the B3LYP method. Single-point calculations have also been carried out at the CCSD(T) level. The most stable structure of Co(+)-glycine is bidentate, with the Co(+) cation interacting with the amino group and the carbonyl oxygen of neutral glycine, and the ground electronic state being (3)A. For Co(2+)-glycine, the lowest energy structure corresponds to the interaction of the metal cation with the carboxylate group of the zwitterionic glycine, the ground electronic state being (4)A''.
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Affiliation(s)
- E Constantino
- Departament de Química, Universitat Autonoma de Barcelona, Bellaterra 08193, Spain
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16
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Rodríguez-Santiago L, Noguera M, Sodupe M, Salpin JY, Tortajada J. Gas Phase Reactivity of Ni+ with Urea. Mass Spectrometry and Theoretical Studies. J Phys Chem A 2003. [DOI: 10.1021/jp036216f] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- L. Rodríguez-Santiago
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, and Laboratoire Analyze et Environnement. CNRS UMR 8587, Université d'Evry-Val-d'Essonne, Boulevard François Mitterrand 91025 Evry Cedex, France
| | - M. Noguera
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, and Laboratoire Analyze et Environnement. CNRS UMR 8587, Université d'Evry-Val-d'Essonne, Boulevard François Mitterrand 91025 Evry Cedex, France
| | - M. Sodupe
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, and Laboratoire Analyze et Environnement. CNRS UMR 8587, Université d'Evry-Val-d'Essonne, Boulevard François Mitterrand 91025 Evry Cedex, France
| | - J. Y. Salpin
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, and Laboratoire Analyze et Environnement. CNRS UMR 8587, Université d'Evry-Val-d'Essonne, Boulevard François Mitterrand 91025 Evry Cedex, France
| | - J. Tortajada
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, and Laboratoire Analyze et Environnement. CNRS UMR 8587, Université d'Evry-Val-d'Essonne, Boulevard François Mitterrand 91025 Evry Cedex, France
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17
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Liu H, Sun J, Yang S. Photodissociation of Bidentate Metal Complex Cations−Hydrogen Shift Reactions. J Phys Chem A 2003. [DOI: 10.1021/jp034757z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Haichuan Liu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Julong Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Shihe Yang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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18
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Hanna D, Silva M, Morrison J, Tekarli S, Anbalagan V, Van Stipdonk M. Gas−Phase Hydration and Alcohol Addition Reactions of Complexes Composed of Ag+ and a Single Alcohol Molecule. J Phys Chem A 2003. [DOI: 10.1021/jp027797w] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dorothy Hanna
- Department of Chemistry, Kansas Wesleyan University, Salina, Kansas 67401, and Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
| | - Manohari Silva
- Department of Chemistry, Kansas Wesleyan University, Salina, Kansas 67401, and Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
| | - Jennifer Morrison
- Department of Chemistry, Kansas Wesleyan University, Salina, Kansas 67401, and Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
| | - Sammer Tekarli
- Department of Chemistry, Kansas Wesleyan University, Salina, Kansas 67401, and Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
| | - Victor Anbalagan
- Department of Chemistry, Kansas Wesleyan University, Salina, Kansas 67401, and Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
| | - Michael Van Stipdonk
- Department of Chemistry, Kansas Wesleyan University, Salina, Kansas 67401, and Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
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19
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Klagkou K, Pullen F, Harrison M, Organ A, Firth A, Langley GJ. Approaches towards the automated interpretation and prediction of electrospray tandem mass spectra of non-peptidic combinatorial compounds. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2003; 17:1163-1168. [PMID: 12772272 DOI: 10.1002/rcm.987] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Combinatorial chemistry is widely used within the pharmaceutical industry as a means of rapid identification of potential drugs. With the growth of combinatorial libraries, mass spectrometry (MS) became the key analytical technique because of its speed of analysis, sensitivity, accuracy and ability to be coupled with other analytical techniques. In the majority of cases, electrospray mass spectrometry (ES-MS) has become the default ionisation technique. However, due to the absence of fragment ions in the resulting spectra, tandem mass spectrometry (MS/MS) is required to provide structural information for the identification of an unknown analyte. This work discusses the first steps of an investigation into the fragmentation pathways taking place in electrospray tandem mass spectrometry. The ultimate goal for this project is to set general fragmentation rules for non-peptidic, pharmaceutical, combinatorial compounds. As an aid, an artificial intelligence (AI) software package is used to facilitate interpretation of the spectra. This initial study has focused on determining the fragmentation rules for some classes of compound types that fit the remit as outlined above. Based on studies carried out on several combinatorial libraries of these compounds, it was established that different classes of drug molecules follow unique fragmentation pathways. In addition to these general observations, the specific ionisation processes and the fragmentation pathways involved in the electrospray mass spectra of these systems were explored. The ultimate goal will be to incorporate our findings into the computer program and allow identification of an unknown, non-peptidic compound following insertion of its ES-MS/MS spectrum into the AI package. The work herein demonstrates the potential benefit of such an approach in addressing the issue of high-throughput, automated MS/MS data interpretation.
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Affiliation(s)
- Katerina Klagkou
- Department of Chemistry, University of Southampton, Southampton SO17 1BJ, UK
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20
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Boutreau L, Toulhoat P, Tortajada J, Luna A, Mó O, Yáñez M. Reactions between Glycolic Acid and Cu+ in the Gas Phase. An Experimental and Theoretical Study. J Phys Chem A 2002. [DOI: 10.1021/jp026378w] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Shoeib T, Siu KWM, Hopkinson AC. Silver Ion Binding Energies of Amino Acids: Use of Theory to Assess the Validity of Experimental Silver Ion Basicities Obtained from the Kinetic Method. J Phys Chem A 2002. [DOI: 10.1021/jp013662z] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tamer Shoeib
- Department of Chemistry and Centre for Research in Mass Spectrometry, York University, Toronto, Ontario, Canada, M3J 1P3
| | - K. W. Michael Siu
- Department of Chemistry and Centre for Research in Mass Spectrometry, York University, Toronto, Ontario, Canada, M3J 1P3
| | - Alan C. Hopkinson
- Department of Chemistry and Centre for Research in Mass Spectrometry, York University, Toronto, Ontario, Canada, M3J 1P3
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22
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Shoeib T, Cunje A, Hopkinson AC, Siu KWM. Gas-phase fragmentation of the Ag+-phenylalanine complex: cation-pi interactions and radical cation formation. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2002; 13:408-416. [PMID: 11951979 DOI: 10.1016/s1044-0305(02)00353-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Collision-induced dissociation experiments on the Ag+-phenylalanine complex using several collision energies were shown to yield ten different fragment ions. Unambiguous assignment of these fragment ions were made by careful analysis of deuterium labeling experiments. The losses of H2O, CO, CO2, and AgH were commonly observed; also encountered were the losses of H2, Ag, and H. Deuterium labeling experiments and density functional calculations have been employed to probe fragmentation mechanisms that account for all experimental results.
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Affiliation(s)
- Tamer Shoeib
- Department of Chemistry and Center for Research in Mass Spectrometry, York University, Toronto, Ontario, Canada
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23
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Perera BA, Gallardo AL, Barr JM, Tekarli SM, Anbalagan V, Talaty ER, Van Stipdonk MJ. Influence of a ring substituent on the tendency to form H(2)O adducts to Ag(+) complexes with phenylalanine analogues in an ion trap mass spectrometer. JOURNAL OF MASS SPECTROMETRY : JMS 2002; 37:401-413. [PMID: 11948847 DOI: 10.1002/jms.296] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In a previous report we showed that certain binary Ag(+)-amino acid complexes formed adduct ions by the attachment of a single water and methanol molecule when stored in an ion trap mass spectrometer: complexes with aliphatic amino acids and with 4-fluorophenylalanine formed the adduct ions whereas complexes with phenylalanine and tryptophan did not. In this study we compared the tendency of the Ag(+) complexes derived from phenylalanine, 4-fluorophenylalanine, 4-hydroxyphenylalanine (tyrosine), 4-bromophenylalanine, 4-nitrophenylalanine and aminocyclohexanepropionic acid to form water adducts when stored, without further activation, in the ion trap for times ranging from 1 to 500 ms. Because the donation of pi electron density to the Ag(+) ion is a likely determining factor in complex reactivity, our aim in the present study was to determine qualitatively the influence of para-position substituents on the aromatic ring on the formation of the water adducts. Our results show that the reactivity of the complexes is influenced significantly by the presence of the various substituents. Decreases in [M + Ag](+) ion abundance, and increases in adduct ion abundance, both measured as a function of storage time, follow the trend -NO(2) > -Br > -F > -OH > -H. The complex of Ag(+) with 4-nitrophenylalanine was nearly as reactive towards water as the Ag(+) complex with aminocyclohexanepropionic acid, the last being an amino acid devoid of pi character in the ring system. Collision induced dissociation of the [M + Ag](+) species derived from the amino acids produces, among other products, Ag(+) complexes with a para-substituted phenylacetaldehyde: complexes that also form adduct species when stored in the ion trap. The trends in adduct ion formation exhibited by the aldehyde-Ag(+) complex ions were similar to those observed for the precursor complexes of Ag(+) and the amino acids, confirming the influence of the ring substituent.
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Affiliation(s)
- B A Perera
- Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051, USA
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24
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Wincel H, Fokkens RH. Gas-phase ion chemistry of Glu/Met systems. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2002; 16:15-26. [PMID: 11754243 DOI: 10.1002/rcm.540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A combined chemical ionisation and tandem mass spectrometry (MS/MS) approach has been used for investigation of the gas-phase ion chemistry of systems containing the amino acids Glu and Met, and the dipeptides gamma-Glu-Met and Met-Glu. The metastable fragmentation of the protonated dimer, (Glu)2H(+), reveals an intracluster reaction leading to the elimination of the Glu residue. The main features of the ion-molecule reactions observed in the systems containing Glu and Glu + Met can be described in terms of sequential adduct formation. The results obtained for the thermal dehydration of Glu were used to rationalise the formation of the proton-bound structures (Glu-H2O...H(+)...(Glu-H2O) and (Glu-H2O)3-H(+). The adduct ions, [(Glu-H2O) + H + Glu](+) and [(Glu-H2O) + H + Met](+), and further association products were also observed. The results lead to a reconsideration of the structural aspects proposed earlier for these species in the sense that they suggest that the systems correspond to a mixture of isomeric covalent and proton-bound structures. The thermal effects on the decomposition of the neutral (gamma-Glu-Met) and its protonated form, (gamma-Glu-Met)H(+), at m/z 279 were investigated, and dramatic changes in the MI spectra of the m/z 279 ion with temperature were found. A mechanistic explanation for the observed evolution of higher mass ion peaks in the mass spectra is developed.
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Affiliation(s)
- H Wincel
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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25
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Talaty ER, Perera BA, Gallardo AL, Barr JM, Van Stipdonk MJ. Elucidation of Fragmentation Pathways for the Collision-Induced Dissociation of the Binary Ag(I) Complex with Phenylalanine. J Phys Chem A 2001. [DOI: 10.1021/jp011411k] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Erach R. Talaty
- Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
| | - B. Asiri Perera
- Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
| | - Andrea L. Gallardo
- Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
| | - Jessica M. Barr
- Department of Chemistry, Wichita State University, Wichita, Kansas 67260-0051
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26
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Rodriguez-Santiago L, Sodupe M, Tortajada J. Gas-Phase Reactivity of Ni+ with Glycine. J Phys Chem A 2001. [DOI: 10.1021/jp004461i] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- L. Rodriguez-Santiago
- Laboratoire Analyse et Environnement, CNRS UMR 8587, Université d'Evry-Val-d'Essonne, Boulevard Françoise Mitterrand 91025 Evry Cedex, and Departament de Quimica, Universitat Autonoma de Barcelona, Bellaterra 08193 Barcelona
| | - M. Sodupe
- Laboratoire Analyse et Environnement, CNRS UMR 8587, Université d'Evry-Val-d'Essonne, Boulevard Françoise Mitterrand 91025 Evry Cedex, and Departament de Quimica, Universitat Autonoma de Barcelona, Bellaterra 08193 Barcelona
| | - J. Tortajada
- Laboratoire Analyse et Environnement, CNRS UMR 8587, Université d'Evry-Val-d'Essonne, Boulevard Françoise Mitterrand 91025 Evry Cedex, and Departament de Quimica, Universitat Autonoma de Barcelona, Bellaterra 08193 Barcelona
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27
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Shields SJ, Bluhm BK, Russell DH. Fragmentation chemistry of [M + Cu]+ peptide ions containing an N-terminal arginine. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2000; 11:626-638. [PMID: 10883818 DOI: 10.1016/s1044-0305(00)00128-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
[M + Cu]+ peptide ions formed by matrix-assisted laser desorption/ionization from direct desorption off a copper sample stage have sufficient internal energy to undergo metastable ion dissociation in a time-of-flight mass spectrometer. On the basis of fragmentation chemistry of peptides containing an N-terminal arginine, we propose the primary Cu+ ion binding site is the N-terminal arginine with Cu+ binding to the guanidine group of arginine and the N-terminal amine. The principal decay products of [M + Cu]+ peptide ions containing an N-terminal arginine are [a(n) + Cu - H]+ and [b(n) + Cu - H]+ fragments. We show evidence to suggest that [a(n) + Cu - H]+ fragment ions are formed by elimination of CO from [b(n) + Cu - H]+ ions and by direct backbone cleavage. We conclude that Cu+ ionizes the peptide by attaching to the N-terminal arginine residue; however, fragmentation occurs remote from the Cu+ ion attachment site involving metal ion promoted deprotonation to generate a new site of protonation. That is, the fragmentation reactions of [M + Cu]+ ions can be described in terms of a "mobile proton" model. Furthermore, proline residues that are adjacent to the N-terminal arginine do not inhibit formation of [b(n) + Cu - H]+ ion, whereas proline residues that are distant to the charge carrying arginine inhibit formation of [b(n) + Cu - H]+ ions. An unusual fragment ion, [c(n) + Cu + H]+, is also observed for peptides containing lysine, glutamine, or asparagine in close proximity to the Cu+ carrying N-terminal arginine. Mechanisms for formation of this fragment ion are also proposed.
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Affiliation(s)
- S J Shields
- Department of Chemistry, Texas A&M University, College Station 77842, USA
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28
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Gatlin CL, Turecek F. Quantitative electrospray ionization mass spectrometric studies of ternary complexes of amino acids with Cu(2+) and phenanthroline. JOURNAL OF MASS SPECTROMETRY : JMS 2000; 35:172-177. [PMID: 10679978 DOI: 10.1002/(sici)1096-9888(200002)35:2<172::aid-jms926>3.0.co;2-c] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Electrospray ionization (ESI) mass spectra of ternary complexes of Cu(2+) and 1,10-phenanthroline with the 20 essential amino acids (AA) were investigated quantitatively. Non-basic amino acids formed singly charged complexes of the [Cu(AA - H)phen](+) type. Lysine (Lys) and arginine (Arg) formed doubly charged complexes of the [Cu(HAA - H)phen](2+) type. Detection limits were determined for the complexes of phenylalanine (Phe), glutamic acid (Glu) and Arg, which were at low micromolar or submicromolar concentrations under routine conditions. Detection limits of low nanomolar concentrations are possible for amino acids with hydrophobic side-chains (Phe, Tyr, Trp, Leu, Ile) as determined for Phe. The efficiencies for the formation by ESI of gaseous [Cu(AA - H)phen](+) ions were determined and correlated with the acid-base properties of the amino acids, ternary complex stability constants and amino acid hydrophobicities expressed as the Bull-Breese indices (DeltaF). A weak correlation was found between DeltaF and the ESI efficiencies for the formation of gaseous [Cu(AA - H)phen](+) [Cu(HAA - H]phen](2+) and [AA + H](+) ions that showed that amino acids with hydrophobic side-chains were ionized more efficiently. In the ESI of binary and ternary amino acid mixtures, the formation of gas-phase Cu-phen complexes of amino acids with hydrophobic side-chains was enhanced in the presence of complexes of amino acids with polar or basic side-chains. An interesting enhancement of the ESI formation of [Cu(Glu - H)phen](+) was observed in mixtures. The effect is explained by ion-cluster formation at the droplet interface that results in enhanced desorption of the glutamic acid complex.
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Affiliation(s)
- C L Gatlin
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700, USA
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29
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Luna A, Gevrey S, Tortajada J. Modeling the Interaction of the Phosphate Group in Nucleotides with Copper(I) in the Gas Phase: Reactivity of Cu+ with Orthophosphoric Acid and Its Monomethyl Ester. J Phys Chem B 1999. [DOI: 10.1021/jp991050x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Luna
- Laboratoire de Chimie Organique Structurale, Universite Pierre et Marie Curie, CNRS UMR 8587, 4 Place Jussieu, Boîte 45, 75252 Paris Cedex 05, France
| | - S. Gevrey
- Laboratoire de Chimie Organique Structurale, Universite Pierre et Marie Curie, CNRS UMR 8587, 4 Place Jussieu, Boîte 45, 75252 Paris Cedex 05, France
| | - J. Tortajada
- Laboratoire de Chimie Organique Structurale, Universite Pierre et Marie Curie, CNRS UMR 8587, 4 Place Jussieu, Boîte 45, 75252 Paris Cedex 05, France
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30
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Wu J, Wesdemiotis C. Cu(NH3)1–2 complexes: formation and characterization in the gas phase by neutralization–reionization mass spectrometry. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00204-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Ryzhov V, Dunbar RC. Interactions of Phenol and Indole with Metal Ions in the Gas Phase: Models For Tyr and Trp Side-Chain Binding. J Am Chem Soc 1999. [DOI: 10.1021/ja983272z] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Owega S, Lai EP, Mullett WM. Laser desorption ionization of gramicidin S on thin silver films with matrix isolation in surface plasmon resonance excitation. J Photochem Photobiol A Chem 1998. [DOI: 10.1016/s1010-6030(98)00397-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Alcamí M, Mó O, Yáñez M, Luna A, Morizur JP, Tortajada J. Exploring the Potential Energy Surface of the Association of Cu+ to Oxaziridine, Nitrosomethane, and Formaldoxime. J Phys Chem A 1998. [DOI: 10.1021/jp982796i] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Berthelot J, Luna A, Tortajada J. Gas-Phase Reactivity of (C5H5Mg)+ Complexes: An Experimental and Theoretical Study. J Phys Chem A 1998. [DOI: 10.1021/jp981562w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Berthelot
- Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boîte 45, 4 Place Jussieu, F-75252 Paris Cedex 05, France
| | - A. Luna
- Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boîte 45, 4 Place Jussieu, F-75252 Paris Cedex 05, France
| | - J. Tortajada
- Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boîte 45, 4 Place Jussieu, F-75252 Paris Cedex 05, France
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36
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Luna A, Amekraz B, Tortajada J, Morizur JP, Alcamí M, Mó O, Yáñez M. Modeling the Interactions between Peptide Functions and Cu(I): Formamide−Cu+ Reactions in the Gas Phase. J Am Chem Soc 1998. [DOI: 10.1021/ja971623o] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Luna
- Contribution from the Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boite 45, 4 Place Jussieu, F-75252 Paris Cedex 05, and Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - B. Amekraz
- Contribution from the Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boite 45, 4 Place Jussieu, F-75252 Paris Cedex 05, and Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - J. Tortajada
- Contribution from the Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boite 45, 4 Place Jussieu, F-75252 Paris Cedex 05, and Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - J. P. Morizur
- Contribution from the Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boite 45, 4 Place Jussieu, F-75252 Paris Cedex 05, and Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - M. Alcamí
- Contribution from the Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boite 45, 4 Place Jussieu, F-75252 Paris Cedex 05, and Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - O. Mó
- Contribution from the Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boite 45, 4 Place Jussieu, F-75252 Paris Cedex 05, and Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - M. Yáñez
- Contribution from the Laboratoire de Chimie Organique Structurale, Université Pierre et Marie Curie, CNRS UMR 172, Boite 45, 4 Place Jussieu, F-75252 Paris Cedex 05, and Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
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37
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Luna A, Morizur JP, Tortajada J, Alcamí M, Mó O, Yáñez M. Role of Cu+ Association on the Formamide → Formamidic Acid → (Aminohydroxy)carbene Isomerizations in the Gas Phase. J Phys Chem A 1998. [DOI: 10.1021/jp980629c] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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A new approach to the gas phase chemistry of ternary transition metal complexes: Ion-beam induced reactions. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0168-1176(97)00141-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Luna A, Amekraz B, Morizur JP, Tortajada J, Mó O, Yáñez M. Reactions between Guanidine and Cu+ in the Gas Phase. An Experimental and Theoretical Study. J Phys Chem A 1997. [DOI: 10.1021/jp9710300] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Hoyau S, Ohanessian G. Absolute Affinities of α-Amino Acids for Cu+in the Gas Phase. A Theoretical Study. J Am Chem Soc 1997. [DOI: 10.1021/ja963432b] [Citation(s) in RCA: 147] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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