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Liu Y, Wang X, Zhang D, Wang C, Xie H, Chen H, Chai Y. Does deprotonated benzoic acid lose carbon monoxide in collision-induced dissociation? JOURNAL OF MASS SPECTROMETRY : JMS 2024; 59:e4990. [PMID: 38146124 DOI: 10.1002/jms.4990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 10/25/2023] [Accepted: 11/09/2023] [Indexed: 12/27/2023]
Abstract
Decarboxylation is known to be the major fragmentation pathway for the deprotonated carboxylic acids in collision-induced dissociation (CID). However, in the CID mass spectrum of deprotonated benzoic acid (m/z 121) recorded on a Q-orbitrap mass spectrometer, the dominant peak was found to be m/z 93 instead of the anticipated m/z 77. Based on theoretical calculations, 18 O-isotope labeling and MS3 experiments, we demonstrated that the fragmentation of benzoate anion begins with decarboxylation, but the initial phenide anion (m/z 77) can react with trace O2 in the mass analyzer to produce phenolate anion (m/z 93) and other oxygen-containing ions. Thus oxygen adducts should be considered when annotating the MS/MS spectra of benzoic acids.
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Affiliation(s)
- Yingying Liu
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tea Products (Hangzhou), Ministry of Agriculture and Rural Affairs, Hangzhou, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xue Wang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tea Products (Hangzhou), Ministry of Agriculture and Rural Affairs, Hangzhou, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Danyang Zhang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tea Products (Hangzhou), Ministry of Agriculture and Rural Affairs, Hangzhou, China
| | - Chen Wang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tea Products (Hangzhou), Ministry of Agriculture and Rural Affairs, Hangzhou, China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., Hangzhou, China
| | - Hongping Chen
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tea Products (Hangzhou), Ministry of Agriculture and Rural Affairs, Hangzhou, China
| | - Yunfeng Chai
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tea Products (Hangzhou), Ministry of Agriculture and Rural Affairs, Hangzhou, China
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2
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Zhou J, Yang P, Kots PA, Cohen M, Chen Y, Quinn CM, de Mello MD, Anibal Boscoboinik J, Shaw WJ, Caratzoulas S, Zheng W, Vlachos DG. Tuning the reactivity of carbon surfaces with oxygen-containing functional groups. Nat Commun 2023; 14:2293. [PMID: 37085515 PMCID: PMC10121666 DOI: 10.1038/s41467-023-37962-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/07/2023] [Indexed: 04/23/2023] Open
Abstract
Oxygen-containing carbons are promising supports and metal-free catalysts for many reactions. However, distinguishing the role of various oxygen functional groups and quantifying and tuning each functionality is still difficult. Here we investigate the role of Brønsted acidic oxygen-containing functional groups by synthesizing a diverse library of materials. By combining acid-catalyzed elimination probe chemistry, comprehensive surface characterizations, 15N isotopically labeled acetonitrile adsorption coupled with magic-angle spinning nuclear magnetic resonance, machine learning, and density-functional theory calculations, we demonstrate that phenolic is the main acid site in gas-phase chemistries and unexpectedly carboxylic groups are much less acidic than phenolic groups in the graphitized mesoporous carbon due to electron density delocalization induced by the aromatic rings of graphitic carbon. The methodology can identify acidic sites in oxygenated carbon materials in solid acid catalyst-driven chemistry.
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Affiliation(s)
- Jiahua Zhou
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
| | - Piaoping Yang
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
| | - Pavel A Kots
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Maximilian Cohen
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Ying Chen
- Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Caitlin M Quinn
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, 19716, USA
| | - Matheus Dorneles de Mello
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - J Anibal Boscoboinik
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Wendy J Shaw
- Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Stavros Caratzoulas
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA
| | - Weiqing Zheng
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA.
| | - Dionisios G Vlachos
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA.
- Catalysis Center for Energy Innovation, University of Delaware, Newark, DE, 19716, USA.
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3
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Improved Analysis of Isomeric Polyphenol Dimers Using the 4th Dimension of Trapped Ion Mobility Spectrometry—Mass Spectrometry. Molecules 2022; 27:molecules27134176. [PMID: 35807423 PMCID: PMC9268536 DOI: 10.3390/molecules27134176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 06/24/2022] [Accepted: 06/27/2022] [Indexed: 02/06/2023] Open
Abstract
Dehydrodicatechins resulting from (epi)catechin oxidation have been investigated in different foods and natural products, but they still offer some analytical challenges. The purpose of this research is to develop a method using ultra-high performance liquid chromatography coupled with trapped ion mobility spectrometry and tandem mass spectrometry (UHPLC−ESI−TIMS−QTOF−MS/MS) to improve the characterization of dehydrodicatechins from model solutions (oxidation dimers of (+)-catechin and/or (−)-epicatechin). Approximately 30 dehydrodicatechins were detected in the model solutions, including dehydrodicatechins B with β and ε-interflavanic configurations and dehydrodicatechins A with γ-configuration. A total of 11 dehydrodicatechins B, based on (−)-epicatechin, (+)-catechin, or both, were tentatively identified in a grape seed extract. All of them were of β-configuration, except for one compound that was of ε-configuration. TIMS allowed the mobility separation of chromatographically coeluted isomers including dehydrodicatechins and procyanidins with similar MS/MS fragmentation patterns that would hardly be distinguished by LC-MS/MS alone, which demonstrates the superiority of TIMS added to LC-MS/MS for these kinds of compounds. To the best of our knowledge, this is the first time that ion mobility spectrometry (IMS) was applied to the analysis of dehydrodicatechins. This method can be adapted for other natural products.
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Chatterjee P, Dutta SS, Chakraborty T. Tautomers and Rotamers of Curcumin: A Combined UV Spectroscopy, High-Performance Liquid Chromatography, Ion Mobility Mass Spectrometry, and Electronic Structure Theory Study. J Phys Chem A 2022; 126:1591-1604. [PMID: 35239351 DOI: 10.1021/acs.jpca.1c08612] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The structures of tautomers and rotameric forms of curcumin, the bioactive compound present in spice plant turmeric, have been investigated using ion mobility mass spectrometry (IMMS) in conjunction with high-performance liquid chromatography (HPLC) and UV-visible spectroscopy. Two tautomeric forms of this β-diketone compound, keto-enol and diketo, have been chromatographically separated, and the electronic absorption spectra for these two tautomeric forms in methanol solution have been recorded separately for the first time. The molecular identity of the HPLC-separated solution fractions is established unambiguously by recording the mass and fragmentation spectra simultaneously. The ion mobility spectrum for the deprotonated curcumin anion, [Cur-H]-, corresponding to the diketo tautomer, displays only one peak (P), and the collision cross-section (CCS) value is measured to be 185.9 Å2. However, the ion mobility spectrum corresponding to the HPLC-separated keto-enol tautomer shows three distinctly separated peaks, P, Q, and R, with CCS values of 185.9, 194.8, and 203.4 Å2, respectively, whereby peak R appears to be the most intense one, followed by peaks P and Q. The theoretically calculated CCS values of different isomers of [Cur-H]-, optimized by electronic structure theory methods, display satisfactory correlation with the experimentally observed values, corroborating our assignments. The spectral attributes also indicate the occurrence of structural rearrangements in the electrospray ionization process. With the aid of the electronic structure calculation, low-energy pathways for the occurrence of the structural isomerization to surpass the energy barrier are suggested, which are consistent with the assignments of the peaks observed in the IM spectra.
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Affiliation(s)
- Piyali Chatterjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science 2A Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
| | - Subhra Sankar Dutta
- School of Chemical Sciences, Indian Association for the Cultivation of Science 2A Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
| | - Tapas Chakraborty
- School of Chemical Sciences, Indian Association for the Cultivation of Science 2A Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
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5
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Kobylis P, Kasprzyk M, Nowacki A, Caban M. An investigation of the ionicity of selected ionic liquid matrices used for matrix-assisted laser desorption/ionization. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Batista PR, Penna TC, Ducati LC, Correra TC. p-Aminobenzoic acid protonation dynamics in an evaporating droplet by ab initio molecular dynamics. Phys Chem Chem Phys 2021; 23:19659-19672. [PMID: 34524295 DOI: 10.1039/d1cp01495a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Protonation equilibria are known to vary from the bulk to microdroplet conditions, which could induce many chemical and physical phenomena. Protonated p-aminobenzoic acid (PABA + H+) can be considered a model for probing the protonation dynamics in an evaporating droplet, as its protonation equilibrium is highly dependent on the formation conditions from solution via atmospheric pressure ionization sources. Experiments using diverse experimental techniques have shown that protic solvents allow formation of the O-protomer (PABA protonated in the carboxylic acid group) stable in the gas phase, while aprotic solvents yield the N-protomer (protonated in the amino group) that is the most stable protomer in solution. In this work, we explore the protonation equilibrium of PABA solvated by different numbers of water molecules (n = 0 to 32) using ab initio molecular dynamics. For n = 8-32, the protonation is either at the NH2 group or in the solvent network. The solvent network interacts with the carboxylic acid group, but there is no complete proton transfer to form the O-protomer. For smaller clusters, however, solvent-mediated proton transfers to the carboxylic acid were observed, both via the Grotthuss mechanism and the vehicle or shuttle mechanism (for n = 1 and 2). Thermodynamic considerations allowed a description of the origins of the kinetic trapping effect, which explains the observation of the solution structure in the gas phase. This effect likely occurs in the final evaporation steps, which are outside the droplet size range covered by previous classical molecular dynamics simulations of charged droplets. These results may be considered relevant in determining the nature of the species observed in the ubiquitous ESI based mass spectrometry analysis, and in general for droplet chemistry, explaining how protonation equilibria are drastically changed from bulk to microdroplet conditions.
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Affiliation(s)
- Patrick R Batista
- Department of Fundamental Chemistry, Institute of Chemistry - University of São Paulo, Av. Prof. Lineu Prestes, 748, Cidade Universitária, São Paulo, SP, Brazil.
| | - Tatiana C Penna
- Department of Fundamental Chemistry, Institute of Chemistry - University of São Paulo, Av. Prof. Lineu Prestes, 748, Cidade Universitária, São Paulo, SP, Brazil.
| | - Lucas C Ducati
- Department of Fundamental Chemistry, Institute of Chemistry - University of São Paulo, Av. Prof. Lineu Prestes, 748, Cidade Universitária, São Paulo, SP, Brazil.
| | - Thiago C Correra
- Department of Fundamental Chemistry, Institute of Chemistry - University of São Paulo, Av. Prof. Lineu Prestes, 748, Cidade Universitária, São Paulo, SP, Brazil.
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7
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Fenclova M, Stranska-Zachariasova M, Benes F, Novakova A, Jonatova P, Kren V, Vitek L, Hajslova J. Liquid chromatography-drift tube ion mobility-mass spectrometry as a new challenging tool for the separation and characterization of silymarin flavonolignans. Anal Bioanal Chem 2020; 412:819-832. [PMID: 31919606 DOI: 10.1007/s00216-019-02274-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 10/29/2019] [Accepted: 11/11/2019] [Indexed: 12/30/2022]
Abstract
Silymarin, milk thistle (Silybum marianum) extract, contains a mixture of mostly isomeric bioactive flavonoids and flavonolignans that are extensively studied, especially for their possible liver-protective and anticancer effects. Because of the differing bioactivities of individual isomeric compounds, characterization of their proportion in a mixture is highly important for predicting its effect on health. However, because of silymarin's complexity, this is hardly feasible by common analytical techniques. In this work, ultraperformance liquid chromatography coupled with drift tube ion mobility spectrometry and quadrupole time-of-flight mass spectrometry was used. Eleven target silymarin compounds (taxifolin, isosilychristin, silychristins A and B, silydianin, silybins A and B, 2,3-cis-silybin B, isosilybins A and B and 2,3-dehydrosilybin) and five unknown flavonolignan isomers detected in the milk thistle extract were fully separated in a 14.5-min analysis run. All the compounds were characterized on the basis of their accurate mass, retention time, drift time, collision cross section and fragmentation spectra. The quantitative approach based on evaluation of the ion mobility data demonstrated lower detection limits, an extended linear range and total separation of interferences from the compounds of interest compared with the traditional approach based on evaluation of liquid chromatography-quadrupole time-of-flight mass spectrometry data. The following analysis of a batch of milk thistle-based food supplements revealed significant variability in the silymarin pattern, especially in the content of silychristin A and silybins A and B. This newly developed method might have high application potential, especially for the characterization of materials intended for bioactivity studies in which information on the exact silymarin composition plays a crucial role. Graphical Abstract.
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Affiliation(s)
- Marie Fenclova
- Department of Food Analysis and Nutrition, University of Chemistry and Technology, Technická 3, 16628, Prague 6, Czech Republic
| | - Milena Stranska-Zachariasova
- Department of Food Analysis and Nutrition, University of Chemistry and Technology, Technická 3, 16628, Prague 6, Czech Republic.
| | - Frantisek Benes
- Department of Food Analysis and Nutrition, University of Chemistry and Technology, Technická 3, 16628, Prague 6, Czech Republic
| | - Alena Novakova
- Department of Food Analysis and Nutrition, University of Chemistry and Technology, Technická 3, 16628, Prague 6, Czech Republic
| | - Petra Jonatova
- Department of Food Analysis and Nutrition, University of Chemistry and Technology, Technická 3, 16628, Prague 6, Czech Republic
| | - Vladimir Kren
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 14220, Prague 4, Czech Republic
| | - Libor Vitek
- Institute of Medical Biochemistry and Laboratory Diagnostics and 4th Department of Internal Medicine, 1st Faculty of Medicine and Faculty General Hospital, Charles University, Katerinska 32, 12108, Prague 2, Czech Republic
| | - Jana Hajslova
- Department of Food Analysis and Nutrition, University of Chemistry and Technology, Technická 3, 16628, Prague 6, Czech Republic
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8
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Stark TD, Ranner J, Stiglbauer B, Weiss P, Stark S, Balemba OB, Hofmann T. Construction and Application of a Database for a Five-Dimensional Identification of Natural Compounds in Garcinia Species by Means of UPLC-ESI-TWIMS-TOF-MS: Introducing Gas Phase Polyphenol Conformer Drift Time Distribution Intensity Ratios. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:975-985. [PMID: 30576604 DOI: 10.1021/acs.jafc.8b06157] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Thirty-four reference compounds from G. buchananii were analyzed by means of UPLC-ESI-IMS-TOF-MS to build a database consisting of retention time, accurate m/ z of precursors and fragment ions, and rotationally averaged collision cross-sectional area (CCS). The CCS value of six selected compounds analyzed in bark extract in different concentrations and solvent systems showed excellent intra- and interday precision (RSD ≤ 0.9%). The established database was applied on different organs of G. buchananii as well as G. kola, G. mangostana, and G. cambogia enabling a fast and reliable identification of these natural bioactives. For several compounds, more than one drift time species could be highlighted, which we propose to be hydrogen bond stabilized rotational isomers transferred from solution to gas phase. We used all CCS values of one compound, and we propose to add also the intensity ratio of the conformers as a new and additional characteristic compound parameter in compound identification/screening/database applications to reduce dereplication and false positives and to strengthen the identification.
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Affiliation(s)
- Timo D Stark
- Lehrstuhl für Lebensmittelchemie und Molekulare Sensorik , Technische Universität München , Lise-Meitner-Str. 34 , 85354 Freising , Germany
| | - Josef Ranner
- Lehrstuhl für Lebensmittelchemie und Molekulare Sensorik , Technische Universität München , Lise-Meitner-Str. 34 , 85354 Freising , Germany
| | - Benedikt Stiglbauer
- Lehrstuhl für Lebensmittelchemie und Molekulare Sensorik , Technische Universität München , Lise-Meitner-Str. 34 , 85354 Freising , Germany
| | - Patrick Weiss
- Lehrstuhl für Lebensmittelchemie und Molekulare Sensorik , Technische Universität München , Lise-Meitner-Str. 34 , 85354 Freising , Germany
| | - Sofie Stark
- Lehrstuhl für Lebensmittelchemie und Molekulare Sensorik , Technische Universität München , Lise-Meitner-Str. 34 , 85354 Freising , Germany
| | - Onesmo B Balemba
- Department of Biological Sciences , University of Idaho , Moscow , Idaho 83844 , United States
| | - Thomas Hofmann
- Lehrstuhl für Lebensmittelchemie und Molekulare Sensorik , Technische Universität München , Lise-Meitner-Str. 34 , 85354 Freising , Germany
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9
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Matthews E, Cercola R, Dessent CEH. Protomer-Dependent Electronic Spectroscopy and Photochemistry of the Model Flavin Chromophore Alloxazine. Molecules 2018; 23:molecules23082036. [PMID: 30110962 PMCID: PMC6222404 DOI: 10.3390/molecules23082036] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/10/2018] [Accepted: 08/11/2018] [Indexed: 12/16/2022] Open
Abstract
Flavin chromophores play key roles in a wide range of photoactive proteins, but key questions exist in relation to their fundamental spectroscopic and photochemical properties. In this work, we report the first gas-phase spectroscopy study of protonated alloxazine (AL∙H⁺), a model flavin chromophore. Laser photodissociation is employed across a wide range (2.34⁻5.64 eV) to obtain the electronic spectrum and characterize the photofragmentation pathways. By comparison to TDDFT quantum chemical calculations, the spectrum is assigned to two AL∙H⁺ protomers; an N5 (dominant) and O4 (minor) form. The protomers have distinctly different spectral profiles in the region above 4.8 eV due to the presence of a strong electronic transition for the O4 protomer corresponding to an electron-density shift from the benzene to uracil moiety. AL∙H⁺ photoexcitation leads to fragmentation via loss of HCN and HNCO (along with small molecules such as CO₂ and H₂O), but the photofragmentation patterns differ dramatically from those observed upon collision excitation of the ground electronic state. This reveals that fragmentation is occurring during the excited state lifetime. Finally, our results show that the N5 protomer is associated primarily with HNCO loss while the O4 protomer is associated with HCN loss, indicating that the ring-opening dynamics are dependent on the location of protonation in the ground-state molecule.
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Affiliation(s)
- Edward Matthews
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Rosaria Cercola
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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10
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Zanotto L, Heerdt G, Souza PCT, Araujo G, Skaf MS. High performance collision cross section calculation-HPCCS. J Comput Chem 2018; 39:1675-1681. [PMID: 29498071 DOI: 10.1002/jcc.25199] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/31/2018] [Accepted: 02/07/2018] [Indexed: 12/13/2022]
Abstract
Since the commercial introduction of Ion Mobility coupled with Mass Spectrometry (IM-MS) devices in 2003, a large number of research laboratories have embraced the technique. IM-MS is a fairly rapid experiment used as a molecular separation tool and to obtain structural information. The interpretation of IM-MS data is still challenging and relies heavily on theoretical calculations of the molecule's collision cross section (CCS) against a buffer gas. Here, a new software (HPCCS) is presented, which performs CCS calculations using high perfomance computing techniques. Based on the trajectory method, HPCCS can accurately calculate CCS for a great variety of molecules, ranging from small organic molecules to large protein complexes, using helium or nitrogen as buffer gas with considerable gains in computer time compared to publicly available codes under the same level of theory. HPCCS is available as free software under the Academic Use License at https://github.com/cepid-cces/hpccs. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Leandro Zanotto
- Institute of Chemistry and Center for Computational Engineering & Sciences, University of Campinas, Campinas, São Paulo, 13083-852, Brazil
| | - Gabriel Heerdt
- Institute of Chemistry and Center for Computational Engineering & Sciences, University of Campinas, Campinas, São Paulo, 13083-852, Brazil
| | - Paulo C T Souza
- Institute of Chemistry and Center for Computational Engineering & Sciences, University of Campinas, Campinas, São Paulo, 13083-852, Brazil.,Faculty of Mathematics and Natural Sciences, University of Groningen, Groningen, 9747, AG, The Netherlands
| | - Guido Araujo
- Institute of Computing and Center for Computational Engineering & Sciences, University of Campinas, Campinas, São Paulo, 13083-970, Brazil
| | - Munir S Skaf
- Institute of Chemistry and Center for Computational Engineering & Sciences, University of Campinas, Campinas, São Paulo, 13083-852, Brazil
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11
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Boschmans J, Lemière F, Sobott F. Analyzing complex mixtures of drug-like molecules: Ion mobility as an adjunct to existing liquid chromatography-(tandem) mass spectrometry methods. J Chromatogr A 2017; 1490:80-88. [DOI: 10.1016/j.chroma.2017.02.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 01/24/2017] [Accepted: 02/09/2017] [Indexed: 12/17/2022]
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12
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Carita Correra T, Santos Fernandes A, Mota Reginato M, Colucci Ducati L, Berden G, Oomens J. Probing the geometry reorganization from solution to gas-phase in putrescine derivatives by IRMPD, 1H-NMR and theoretical calculations. Phys Chem Chem Phys 2017; 19:24330-24340. [DOI: 10.1039/c7cp04617k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Geometry reorganization of ESI formed ions are demonstrated and explicit calculations of the solution phase are shown to be relevant.
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Affiliation(s)
- Thiago Carita Correra
- Department of Fundamental Chemistry
- Institute of Chemistry
- University of São Paulo
- São Paulo
- Brazil
| | - André Santos Fernandes
- Department of Fundamental Chemistry
- Institute of Chemistry
- University of São Paulo
- São Paulo
- Brazil
| | - Marcelo Mota Reginato
- Department of Fundamental Chemistry
- Institute of Chemistry
- University of São Paulo
- São Paulo
- Brazil
| | - Lucas Colucci Ducati
- Department of Fundamental Chemistry
- Institute of Chemistry
- University of São Paulo
- São Paulo
- Brazil
| | - Giel Berden
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | - Jos Oomens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
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13
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Matthews E, Dessent CEH. Experiment and theory confirm that UV laser photodissociation spectroscopy can distinguish protomers formed via electrospray. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp02817b] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Low-resolution UV spectroscopy within a laser-interfaced commercial mass spectrometer can be used to identify electrosprayed protomers of para-aminobenzoic acid (PABA).
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14
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Matthews E, Dessent CEH. Locating the Proton in Nicotinamide Protomers via Low-Resolution UV Action Spectroscopy of Electrosprayed Solutions. J Phys Chem A 2016; 120:9209-9216. [DOI: 10.1021/acs.jpca.6b10433] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Edward Matthews
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
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15
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Tata A, Eberlin MN. Catiomers and aniomers: unique classes of isomeric ions. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:1249-1252. [PMID: 28328024 DOI: 10.1002/rcm.7548] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 02/25/2016] [Accepted: 02/28/2016] [Indexed: 06/06/2023]
Affiliation(s)
- Alessandra Tata
- University of Campinas, Institute of Chemistry, UNICAMP-IQ, Campinas, SP, 13083-970, Brazil
| | - Marcos N Eberlin
- University of Campinas, Institute of Chemistry, UNICAMP-IQ, Campinas, SP, 13083-970, Brazil
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Iacobucci C, Reale S, De Angelis F. Elusive Reaction Intermediates in Solution Explored by ESI-MS: Reverse Periscope for Mechanistic Investigations. Angew Chem Int Ed Engl 2016; 55:2980-93. [DOI: 10.1002/anie.201507088] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/18/2015] [Indexed: 01/02/2023]
Affiliation(s)
- Claudio Iacobucci
- Dipartimento di Scienze Fisiche e Chimiche; Università dell'Aquila; Via Vetoio, Coppito 67100 L'Aquila Italy
| | - Samantha Reale
- Dipartimento di Scienze Fisiche e Chimiche; Università dell'Aquila; Via Vetoio, Coppito 67100 L'Aquila Italy
| | - Francesco De Angelis
- Dipartimento di Scienze Fisiche e Chimiche; Università dell'Aquila; Via Vetoio, Coppito 67100 L'Aquila Italy
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Iacobucci C, Reale S, De Angelis F. Elektrospray-Massenspektrometrie: ein umgekehrtes Periskop zur Erforschung von Reaktionsmechanismen in Lösung. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201507088] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Claudio Iacobucci
- Dipartimento di Scienze Fisiche e Chimiche; Università dell'Aquila; Via Vetoio, Coppito 67100 L'Aquila Italien
| | - Samantha Reale
- Dipartimento di Scienze Fisiche e Chimiche; Università dell'Aquila; Via Vetoio, Coppito 67100 L'Aquila Italien
| | - Francesco De Angelis
- Dipartimento di Scienze Fisiche e Chimiche; Università dell'Aquila; Via Vetoio, Coppito 67100 L'Aquila Italien
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18
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Boschmans J, Jacobs S, Williams JP, Palmer M, Richardson K, Giles K, Lapthorn C, Herrebout WA, Lemière F, Sobott F. Combining density functional theory (DFT) and collision cross-section (CCS) calculations to analyze the gas-phase behaviour of small molecules and their protonation site isomers. Analyst 2016; 141:4044-54. [DOI: 10.1039/c5an02456k] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Computational methods are employed to study the protomers in ESI-IM-MS.
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Affiliation(s)
- Jasper Boschmans
- Biomolecular & Analytical Mass Spectrometry group
- Department of Chemistry
- University of Antwerp
- Antwerp
- Belgium
| | - Sam Jacobs
- Molecular Spectroscopy group
- Department of Chemistry
- University of Antwerp
- Antwerp
- Belgium
| | | | | | | | | | - Cris Lapthorn
- Faculty of Engineering & Science
- University of Greenwich
- Chatham
- UK
| | - Wouter A. Herrebout
- Molecular Spectroscopy group
- Department of Chemistry
- University of Antwerp
- Antwerp
- Belgium
| | - Filip Lemière
- Biomolecular & Analytical Mass Spectrometry group
- Department of Chemistry
- University of Antwerp
- Antwerp
- Belgium
| | - Frank Sobott
- Biomolecular & Analytical Mass Spectrometry group
- Department of Chemistry
- University of Antwerp
- Antwerp
- Belgium
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