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Yu X, Yao ZP. Chiral recognition and determination of enantiomeric excess by mass spectrometry: A review. Anal Chim Acta 2017; 968:1-20. [DOI: 10.1016/j.aca.2017.03.021] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 03/15/2017] [Accepted: 03/16/2017] [Indexed: 10/19/2022]
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2
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Gorla L, Martí-Centelles V, Freimuth L, Altava B, Burguete MI, Luis SV. Cu(2+), Zn(2+), and Ni(2+) Complexes of C2-Symmetric Pseudopeptides with an Aromatic Central Spacer. Inorg Chem 2016; 55:7617-29. [PMID: 27438410 DOI: 10.1021/acs.inorgchem.6b01066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Two new tetradentate C2-symmetric pseudopeptidic ligands derived from Val and Phe containing two amino and two amido groups and a central o-substituted aromatic spacer have been prepared. Their complexes with Cu(2+), Zn(2+), and Ni(2+) have been studied by potentiometry, UV-vis spectrophotometry, FT-IR, and ESI-MS. The presence of the aromatic spacer provides Cu(2+) complexes with stability constants several orders of magnitude higher than those observed for related ligands containing aliphatic central spacers. Besides, the formation of [MH-2L] complex species is favored. Crystal structures for the corresponding Cu(2+) and Ni(2+) have been obtained, revealing the metal atom in an essentially square-planar geometry, although, in several instances, the oxygen atom of an amide carbonyl of a second complex species can act as a fifth coordination site. In the case of Zn(2+), the only crystal structure obtained displays a square-pyramidal arrangement of the metal center. Finally, preliminary experiments show the catalytic activity of some of these complexes, in particular, Zn(2+) complexes, for epoxide ring-opening with using aniline as the nucleophile in a ligand accelerated process.
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Affiliation(s)
- Lingaraju Gorla
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - Vicente Martí-Centelles
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - Lena Freimuth
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - Belén Altava
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - M Isabel Burguete
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - Santiago V Luis
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
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Santos IC, Waybright VB, Fan H, Ramirez S, Mesquita RBR, Rangel AOSS, Fryčák P, Schug KA. Determination of Noncovalent Binding Using a Continuous Stirred Tank Reactor as a Flow Injection Device Coupled to Electrospray Ionization Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:1204-1212. [PMID: 25832030 DOI: 10.1007/s13361-015-1113-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Revised: 02/17/2015] [Accepted: 02/18/2015] [Indexed: 06/04/2023]
Abstract
Described is a new method based on the concept of controlled band dispersion, achieved by hyphenating flow injection analysis with ESI-MS for noncovalent binding determinations. A continuous stirred tank reactor (CSTR) was used as a FIA device for exponential dilution of an equimolar host-guest solution over time. The data obtained was treated for the noncovalent binding determination using an equimolar binding model. Dissociation constants between vancomycin and Ac-Lys(Ac)-Ala-Ala-OH peptide stereoisomers were determined using both the positive and negative ionization modes. The results obtained for Ac-L-Lys(Ac)-D-Ala-D-Ala (a model for a Gram-positive bacterial cell wall) binding were in reasonable agreement with literature values made by other mass spectrometry binding determination techniques. Also, the developed method allowed the determination of dissociation constants for vancomycin with Ac-L-Lys(Ac)-D-Ala-L-Ala, Ac-L-Lys(Ac)-L-Ala-D-Ala, and Ac-L-Lys(Ac)-L-Ala-L-Ala. Although some differences in measured binding affinities were noted using different ionization modes, the results of each determination were generally consistent. Differences are likely attributable to the influence of a pseudo-physiological ammonium acetate buffer solution on the formation of positively- and negatively-charged ionic complexes.
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Affiliation(s)
- Inês C Santos
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401, Porto, Portugal
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Wadhavane PD, Gorla L, Ferrer A, Altava B, Burguete MI, Izquierdo MÁ, Luis SV. Coordination behaviour of new open chain and macrocyclic peptidomimetic compounds with copper(ii). RSC Adv 2015. [DOI: 10.1039/c5ra15852d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Two valine-derived bis(amino amides) ligands have been prepared and fully characterized.
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Affiliation(s)
- Prashant D. Wadhavane
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - Lingaraju Gorla
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - Armando Ferrer
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - Belén Altava
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - M. Isabel Burguete
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - M. Ángeles Izquierdo
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - Santiago V. Luis
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
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5
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Zhang Q, Huang Y, Guo L, Chen C, Guo D, Chen Y, Fu Y. DNA-based nanocomposite as electrochemical chiral sensing platform for the enantioselective interaction with quinine and quinidine. NEW J CHEM 2014. [DOI: 10.1039/c3nj01559a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A DNA-based nanocomposite was prepared to develop a simple strategy for electrochemical chiral analysis.
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Affiliation(s)
- Qing Zhang
- Laboratory of Luminescence and Real-Time Analysis (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
| | - Yihan Huang
- Laboratory of Luminescence and Real-Time Analysis (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
| | - Liju Guo
- Laboratory of Luminescence and Real-Time Analysis (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
| | - Cui Chen
- Laboratory of Luminescence and Real-Time Analysis (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
| | - Dongmei Guo
- Laboratory of Luminescence and Real-Time Analysis (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
| | - Ya Chen
- Laboratory of Luminescence and Real-Time Analysis (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
| | - Yingzi Fu
- Laboratory of Luminescence and Real-Time Analysis (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
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Nour HF, Golon A, Islam T, Fernández-Lahore M, Kuhnert N. Synthesis of novel chiral bis-N-substituted-hydrazinecarboxamide receptors and probing their solution-phase recognition to chiral carboxylic guests by ESI-TOF/MS and tandem ESI-MS. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Milko P, Roithová J, Schug KA, Lemr K. Impact of long-range van der Waals forces on chiral recognition in a Cinchona alkaloid chiral selector system. Phys Chem Chem Phys 2013; 15:6113-21. [DOI: 10.1039/c3cp44444a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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8
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Bobbitt JM, Li L, Carlton DD, Yasin M, Bhawal S, Foss FW, Wernisch S, Pell R, Lindner W, Schug KA. Diastereoselective discrimination of lysine–alanine–alanine peptides by zwitterionic cinchona alkaloid-based chiral selectors using electrospray ionization mass spectrometry. J Chromatogr A 2012; 1269:308-15. [DOI: 10.1016/j.chroma.2012.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 07/27/2012] [Accepted: 08/03/2012] [Indexed: 11/15/2022]
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9
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Martí I, Rubio J, Bolte M, Burguete MI, Vicent C, Quesada R, Alfonso I, Luis SV. Tuning Chloride Binding, Encapsulation, and Transport by Peripheral Substitution of Pseudopeptidic Tripodal Small Cages. Chemistry 2012; 18:16728-41. [DOI: 10.1002/chem.201202182] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Indexed: 11/05/2022]
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10
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Abdoul-Carime H, Harb MM, Montano CG, Teyssier C, Farizon B, Farizon M, Vachon J, Harthong S, Dutasta JP, Jeanneau E, Märk TD. Selective host–guest chemistry investigated by mass spectrometry: Which of the two, choline or acetylcholine, is the preferred one by the 3iPO triphosphonate-cavitand? Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.02.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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11
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Martí I, Ferrer A, Escorihuela J, Burguete MI, Luis SV. Copper(ii) complexes of bis(amino amide) ligands: effect of changes in the amino acid residue. Dalton Trans 2012; 41:6764-76. [DOI: 10.1039/c2dt12459a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Carlton DD, Schug KA. A review on the interrogation of peptide–metal interactions using electrospray ionization-mass spectrometry. Anal Chim Acta 2011; 686:19-39. [DOI: 10.1016/j.aca.2010.11.050] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 11/24/2010] [Accepted: 11/25/2010] [Indexed: 11/27/2022]
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13
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Julínek O, Lindner W, Urbanová M. Study of stereoselective interactions of carbamoylated quinine and quinidine with 3,5-dinitrobenzoyl α-amino acids using VCD spectroscopy in the region of CH stretching vibrations. Chirality 2010; 23:354-60. [DOI: 10.1002/chir.20929] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Accepted: 09/10/2010] [Indexed: 12/29/2022]
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Schug KA, Serrano C, Frycák P. Controlled band dispersion for quantitative binding determination and analysis with electrospray ionization-mass spectrometry. MASS SPECTROMETRY REVIEWS 2010; 29:806-829. [PMID: 19890977 DOI: 10.1002/mas.20267] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This review discusses recent emerging techniques that have been used to couple flow-injection analysis (FIA) and electrospray ionization-mass spectrometry (ESI-MS) for the quantitation of noncovalent binding interactions. Focus is placed predominantly on two such methods. Diffusion-based measurements, developed by Konermann and co-workers, uses controlled-band dispersion prior to ESI-MS to determine diffusion constants and binding constants based on the temporal variation of ligand signal measured in the mass spectrum (an indirect technique). Dynamic titration, developed by Schug and co-workers, is a direct method, where a temporal compositional gradient of a guest molecule is induced in the presence of host in solution to monitor the concentration dependence of complex formation as a function of observed complex ion abundance after ESI-MS. Further discussion places these techniques in the context of a variety of other direct and indirect ESI-MS-based binding determination methods, and highlights advantages, disadvantages, and practical considerations for their proper use to investigate a broad range of macromolecular and small-molecule interaction systems.
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Affiliation(s)
- Kevin A Schug
- Department of Chemistry & Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, USA.
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15
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Blasco S, Burguete MI, Clares MP, García-España E, Escorihuela J, Luis SV. Coordination of Cu2+ Ions to C2 Symmetric Pseudopeptides Derived from Valine. Inorg Chem 2010; 49:7841-52. [DOI: 10.1021/ic100748g] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Salvador Blasco
- Instituto de Ciencia Molecular (ICMOL), Departamento de Química Inorgánica, Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna (Valencia), Spain
| | - M. Isabel Burguete
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n., 12071 Castellón, Spain
| | - M. Paz Clares
- Instituto de Ciencia Molecular (ICMOL), Departamento de Química Inorgánica, Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna (Valencia), Spain
| | - Enrique García-España
- Instituto de Ciencia Molecular (ICMOL), Departamento de Química Inorgánica, Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna (Valencia), Spain
| | - Jorge Escorihuela
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n., 12071 Castellón, Spain
| | - Santiago V. Luis
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n., 12071 Castellón, Spain
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16
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Enantiomer assays of amino acid derivatives using tertiary amine appended trans-4-hydroxyproline derivatives as chiral selectors in the gas phase. Anal Chim Acta 2010; 661:60-6. [DOI: 10.1016/j.aca.2009.12.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Revised: 11/26/2009] [Accepted: 12/10/2009] [Indexed: 11/20/2022]
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17
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Alfonso I, Bolte M, Bru M, Burguete MI, Luis SV, Vicent C. Molecular recognition of N-protected dipeptides by pseudopeptidic macrocycles: a comparative study of the supramolecular complexes by ESI-MS and NMR. Org Biomol Chem 2010; 8:1329-39. [DOI: 10.1039/b924981h] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Julínek O, Krupička M, Lindner W, Urbanová M. Enantioselective interaction of carbamoylated quinine and (S)-3,5-dinitrobenzoyl alanine: theoretical and experimental circular dichroism study. Phys Chem Chem Phys 2010; 12:11487-97. [DOI: 10.1039/c000046a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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19
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Fryčák P, Schug KA. High throughput multiplexed method for evaluation of enantioselective performance of chiral selectors by HPLC-ESI-MS and dynamic titration: Cinchona alkaloid carbamates discriminatingN-blocked amino acids. Chirality 2009; 21:929-36. [DOI: 10.1002/chir.20691] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Lämmerhofer M. Chiral recognition by enantioselective liquid chromatography: mechanisms and modern chiral stationary phases. J Chromatogr A 2009; 1217:814-56. [PMID: 19906381 DOI: 10.1016/j.chroma.2009.10.022] [Citation(s) in RCA: 516] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 09/30/2009] [Accepted: 10/07/2009] [Indexed: 11/19/2022]
Abstract
An overview of the state-of-the-art in LC enantiomer separation is presented. This tutorial review is mainly focused on mechanisms of chiral recognition and enantiomer distinction of popular chiral selectors and corresponding chiral stationary phases including discussions of thermodynamics, additivity principle of binding increments, site-selective thermodynamics, extrathermodynamic approaches, methods employed for the investigation of dominating intermolecular interactions and complex structures such as spectroscopic methods (IR, NMR), X-ray diffraction and computational methods. Modern chiral stationary phases are discussed with particular focus on those that are commercially available and broadly used. It is attempted to provide the reader with vivid images of molecular recognition mechanisms of selected chiral selector-selectand pairs on basis of solid-state X-ray crystal structures and simulated computer models, respectively. Such snapshot images illustrated in this communication unfortunately cannot account for the molecular dynamics of the real world, but are supposed to be helpful for the understanding. The exploding number of papers about applications of various chiral stationary phases in numerous fields of enantiomer separations is not covered systematically.
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Affiliation(s)
- Michael Lämmerhofer
- Christian Doppler Laboratory for Molecular Recognition Materials, Department of Analytical Chemistry and Food Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria.
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Schug KA, Joshi MD, Frycák P, Maier NM, Lindner W. Investigation of monovalent and bivalent enantioselective molecular recognition by electrospray ionization-mass spectrometry and tandem mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:1629-1642. [PMID: 18692405 DOI: 10.1016/j.jasms.2008.07.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2008] [Revised: 07/04/2008] [Accepted: 07/06/2008] [Indexed: 05/26/2023]
Abstract
In this work is described the investigation of bivalent versus monovalent enantioselective molecular recognition in the context of enantioselective separations. Electrospray ionization-mass spectrometry (ESI-MS) and tandem mass spectrometry (MS/MS) are used for evaluating enantioselective systems through the measurement of (1) relative solution-phase binding constants via titration and (2) relative gas-phase binding via collision threshold dissociation. In HPLC, a cinchonane-type chiral stationary phase (CSP) based on tert.-butylcarbamoylquinine provides vastly increased retention and enantioselectivity for separation of bivalent versus monovalent alkoxy-benzoyl-N-blocked leucine enantiomers. The bivalent enantiomers are able to span and simultaneously interact with multiple interaction sites on the CSP surface, leading to enhanced separation. ESI-MS titration measurements also show an increased avidity for binding between bivalent selector and bivalent selectand, compared with the monovalent system. However, enhanced enantioselectivities measured in HPLC for the bivalent system cannot be reproduced by MS due to inherent mechanistic differences. Assumed discrepancies in relative response factors also give rise to systematic errors which are discussed. The results of MS/MS gas-phase experiments show that enantioselectivity is essentially lost in the absence of solvation, but that dissociation thresholds can provide a measure of relative dissociation energy in the bivalent interaction system compared to the monovalent counterpart. Such measurements may prove useful and efficient in better understanding multivalent interactions, in line with current theoretical considerations of effective concentrations and ion trap effects. This is the first application of mass spectrometric methods for assessing increased avidity of binding in multivalent enantioselective molecular recognition.
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Affiliation(s)
- Kevin A Schug
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, USA.
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Enantioselective complexation of carbamoylated quinine and quinidine with N-blocked amino acids: vibrational and electronic circular dichroism study. Anal Bioanal Chem 2008; 393:303-12. [DOI: 10.1007/s00216-008-2323-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 07/26/2008] [Accepted: 07/28/2008] [Indexed: 10/21/2022]
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Chung MK, Hebling CM, Jorgenson JW, Severin K, Lee SJ, Gagné MR. Deracemization of a Dynamic Combinatorial Library Induced by (−)-Cytidine and (−)-2-Thiocytidine. J Am Chem Soc 2008; 130:11819-27. [DOI: 10.1021/ja803658n] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mee-Kyung Chung
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, Institut des Sciences et Ingénieries Chimiques, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland, and U.S. Army Research Office, P.O. Box 12211, Research Triangle Park, North Carolina 27709
| | - Christine M. Hebling
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, Institut des Sciences et Ingénieries Chimiques, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland, and U.S. Army Research Office, P.O. Box 12211, Research Triangle Park, North Carolina 27709
| | - James W. Jorgenson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, Institut des Sciences et Ingénieries Chimiques, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland, and U.S. Army Research Office, P.O. Box 12211, Research Triangle Park, North Carolina 27709
| | - Kay Severin
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, Institut des Sciences et Ingénieries Chimiques, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland, and U.S. Army Research Office, P.O. Box 12211, Research Triangle Park, North Carolina 27709
| | - Stephen J. Lee
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, Institut des Sciences et Ingénieries Chimiques, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland, and U.S. Army Research Office, P.O. Box 12211, Research Triangle Park, North Carolina 27709
| | - Michel R. Gagné
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, Institut des Sciences et Ingénieries Chimiques, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland, and U.S. Army Research Office, P.O. Box 12211, Research Triangle Park, North Carolina 27709
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Nguyen HP, Schug KA. The advantages of ESI-MS detection in conjunction with HILIC mode separations: Fundamentals and applications. J Sep Sci 2008; 31:1465-80. [DOI: 10.1002/jssc.200700630] [Citation(s) in RCA: 228] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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25
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Fryčák P, Schug KA. Dynamic Titration: Determination of Dissociation Constants for Noncovalent Complexes in Multiplexed Format Using HPLC-ESI-MS. Anal Chem 2008; 80:1385-93. [DOI: 10.1021/ac7024078] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Petr Fryčák
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, Texas 76019-0065
| | - Kevin A. Schug
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, Texas 76019-0065
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González-Álvarez A, Alfonso I, Díaz P, García-España E, Gotor-Fernández V, Gotor V. A Simple Helical Macrocyclic Polyazapyridinophane as a Stereoselective Receptor of Biologically Important Dicarboxylates under Physiological Conditions. J Org Chem 2007; 73:374-82. [DOI: 10.1021/jo701636b] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Almudena González-Álvarez
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería, s/n, Oviedo, Spain, Departamento de Química Orgánica Biológica, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas (IIQAB-CSIC), C/Jordi Girona 18-26, E-08034 Barcelona, Spain, and Instituto de Ciencia Molecular, Departamento de Químca Inorgánica y Orgánica, Universidad de Valencia, C/Dr. Moliner, 50, E-46100, Burjassot, Valencia, Spain
| | - Ignacio Alfonso
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería, s/n, Oviedo, Spain, Departamento de Química Orgánica Biológica, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas (IIQAB-CSIC), C/Jordi Girona 18-26, E-08034 Barcelona, Spain, and Instituto de Ciencia Molecular, Departamento de Químca Inorgánica y Orgánica, Universidad de Valencia, C/Dr. Moliner, 50, E-46100, Burjassot, Valencia, Spain
| | - Pilar Díaz
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería, s/n, Oviedo, Spain, Departamento de Química Orgánica Biológica, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas (IIQAB-CSIC), C/Jordi Girona 18-26, E-08034 Barcelona, Spain, and Instituto de Ciencia Molecular, Departamento de Químca Inorgánica y Orgánica, Universidad de Valencia, C/Dr. Moliner, 50, E-46100, Burjassot, Valencia, Spain
| | - Enrique García-España
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería, s/n, Oviedo, Spain, Departamento de Química Orgánica Biológica, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas (IIQAB-CSIC), C/Jordi Girona 18-26, E-08034 Barcelona, Spain, and Instituto de Ciencia Molecular, Departamento de Químca Inorgánica y Orgánica, Universidad de Valencia, C/Dr. Moliner, 50, E-46100, Burjassot, Valencia, Spain
| | - Vicente Gotor-Fernández
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería, s/n, Oviedo, Spain, Departamento de Química Orgánica Biológica, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas (IIQAB-CSIC), C/Jordi Girona 18-26, E-08034 Barcelona, Spain, and Instituto de Ciencia Molecular, Departamento de Químca Inorgánica y Orgánica, Universidad de Valencia, C/Dr. Moliner, 50, E-46100, Burjassot, Valencia, Spain
| | - Vicente Gotor
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería, s/n, Oviedo, Spain, Departamento de Química Orgánica Biológica, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas (IIQAB-CSIC), C/Jordi Girona 18-26, E-08034 Barcelona, Spain, and Instituto de Ciencia Molecular, Departamento de Químca Inorgánica y Orgánica, Universidad de Valencia, C/Dr. Moliner, 50, E-46100, Burjassot, Valencia, Spain
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27
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Frycák P, Schug KA. On-line dynamic titration: determination of dissociation constants for noncovalent complexes using Gaussian concentration profiles by electrospray ionization mass spectrometry. Anal Chem 2007; 79:5407-13. [PMID: 17542559 DOI: 10.1021/ac070519e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new method for determination of dissociation constants (Kd) using on-line titration by electrospray ionization mass spectrometry is presented. Unlike in common titration experiments, where a set of discrete solutions with a fixed concentration of host and increasing concentration of guest is measured, here a continuous Gaussian concentration profile of guest, formed by band-broadening dispersion during passage through a long tubing, is utilized. An equation allowing access to dissociation constant values from experimental data fit to a 1:1 binding model was derived and incorporated into an in-house-written computer program for automated data processing. The new method is demonstrated for noncovalent complexes of cinchona alkaloid carbamate chiral selectors with N-dinitrobenzoylleucine enantiomers and a series of cyclodextrins with sulfonated azo dyes.
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Affiliation(s)
- Petr Frycák
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, Texas 76019-0065, USA
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28
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Schug KA, Maier NM, Lindner W. Chiral recognition mass spectrometry: remarkable effects observed from the relative ion abundances of ternary diastereomeric complexes using electrospray ionization. Chem Commun (Camb) 2007:414-6. [PMID: 16493818 DOI: 10.1039/b512719j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The relative abundances of ternary diastereomeric complexes (composed each from a cinchonane-type chiral selector, a model chiral acid, and an alkali cation) are shown to change remarkably and fortuitously with variation in concentration and type of alkali metal using electrospray ionization-mass spectrometry and competitive binding analysis.
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Affiliation(s)
- Kevin A Schug
- Department of Analytical Chemistry and Food Chemistry, University of Vienna, Währingerstr. 38, A-10901, Vienna, Austria
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29
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Schug KA, Maier NM, Lindner W. Deuterium isotope effects observed during competitive binding chiral recognition electrospray ionization--mass spectrometry of cinchona alkaloid-based systems. JOURNAL OF MASS SPECTROMETRY : JMS 2006; 41:157-61. [PMID: 16421872 DOI: 10.1002/jms.983] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Deuterium isotope effects are reported for binding between tert-butylcarbamoyl-quinine/quinidine chiral selectors and isotopomeric quasienantiomers of N-(3,5-dinitrobenzoyl)leucine measured using electrospray ionization-mass spectrometry (ESI-MS) and competitive binding. Evaluation of mixtures of each selector with one labeled and one unlabeled enantiomeric selectand of identical configuration showed a significant difference in measured ion abundances of diastereomeric complexes between the selector and each selectand. It was found that in some cases, the complex containing the nondeuterated selectand was 15% more abundant than its deuterated counterpart. On the basis of an assessment of solution- and gas-phase isotope effects reported in the literature, a series of control experiments were performed to study the origin of the effects. On the basis of these measurements, our preliminary conclusion is that the differing gas-phase physicochemical nature of the deuterated versus nondeuterated selectand represents the strongest contribution to the observed effect in this chiral molecular recognition system.
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Affiliation(s)
- Kevin A Schug
- University of Vienna, Department of Analytical Chemistry and Food Chemistry Währingerstrasse 38, A-1090 Vienna, Austria.
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30
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Current literature in mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2006; 41:128-39. [PMID: 16402416 DOI: 10.1002/jms.948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
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31
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González-Alvarez A, Alfonso I, Díaz P, García-España E, Gotor V. A highly enantioselective abiotic receptor for malate dianion in aqueous solution. Chem Commun (Camb) 2006:1227-9. [PMID: 16518499 DOI: 10.1039/b517729d] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The highly enantioselective molecular recognition of the malate dianion by a synthetic receptor in aqueous solution has been studied by potentiometric titrations, mass spectrometry (ESI-MS), diffusion measurements (PGSE NMR) and molecular modeling.
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Affiliation(s)
- Almudena González-Alvarez
- Departamento de Químca Orgánica e Inorgánica, Universidad de Oviedo, Julián Clavería, 33071 Oviedo, Spain
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32
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Schug KA, Lindner W. Chiral molecular recognition for the detection and analysis of enantiomers by mass spectrometric methods. J Sep Sci 2005. [DOI: 10.1002/jssc.200500232] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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