1
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Gass DT, Quintero AV, Hatvany JB, Gallagher ES. Metal adduction in mass spectrometric analyses of carbohydrates and glycoconjugates. MASS SPECTROMETRY REVIEWS 2024; 43:615-659. [PMID: 36005212 DOI: 10.1002/mas.21801] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/22/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Glycans, carbohydrates, and glycoconjugates are involved in many crucial biological processes, such as disease development, immune responses, and cell-cell recognition. Glycans and carbohydrates are known for the large number of isomeric features associated with their structures, making analysis challenging compared with other biomolecules. Mass spectrometry has become the primary method of structural characterization for carbohydrates, glycans, and glycoconjugates. Metal adduction is especially important for the mass spectrometric analysis of carbohydrates and glycans. Metal-ion adduction to carbohydrates and glycoconjugates affects ion formation and the three-dimensional, gas-phase structures. Herein, we discuss how metal-ion adduction impacts ionization, ion mobility, ion activation and dissociation, and hydrogen/deuterium exchange for carbohydrates and glycoconjugates. We also compare the use of different metals for these various techniques and highlight the value in using metals as charge carriers for these analyses. Finally, we provide recommendations for selecting a metal for analysis of carbohydrate adducts and describe areas for continued research.
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Affiliation(s)
- Darren T Gass
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas, USA
| | - Ana V Quintero
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas, USA
| | - Jacob B Hatvany
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas, USA
| | - Elyssia S Gallagher
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas, USA
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2
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Zlibut E, May JC, Wei Y, Gessmann D, Wood CS, Bernat BA, Pugh TE, Palmer-Jones L, Cosquer RP, Dybeck E, McLean JA. Noncovalent Host-Guest Complexes of Artemisinin with α-, β-, and γ- Cyclodextrin Examined by Structural Mass Spectrometry Strategies. Anal Chem 2023; 95:8180-8188. [PMID: 37184072 DOI: 10.1021/acs.analchem.2c05076] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Cyclodextrins (CDs) are a family of macrocyclic oligosaccharides with amphiphilic properties, which can improve the stability, solubility, and bioavailability of therapeutic compounds. There has been growing interest in the advancement of efficient and reliable analytical methods that assist with elucidating CD host-guest drug complexation. In this study, we investigate the noncovalent ion complexes formed between naturally occurring dextrins (αCD, βCD, γCD, and maltohexaose) with the poorly water-soluble antimalarial drug, artemisinin, using a combination of ion mobility-mass spectrometry (IM-MS), tandem MS/MS, and theoretical modeling approaches. This study aims to determine if the drug can complex within the core dextrin cavity forming an inclusion complex or nonspecifically bind to the periphery of the dextrins. We explore the use of group I alkali earth metal additives to promote the formation of various noncovalent gas-phase ion complexes with different drug/dextrin stoichiometries (1:1, 1:2, 1:3, 1:4, and 2:1). Broad IM-MS collision cross section (CCS) mapping (n > 300) and power-law regression analysis were used to confirm the stoichiometric assignments. The 1:1 drug:αCD and drug:βCD complexes exhibited strong preferences for Li+ and Na+ charge carriers, whereas drug:γCD complexes preferred forming adducts with the larger alkali metals, K+, Rb+, and Cs+. Although the ion-measured CCS increased with cation size for the unbound artemisinin and CDs, the 1:1 drug:dextrin complexes exhibit near-identical CCS values regardless of the cation, suggesting these are inclusion complexes. Tandem MS/MS survival yield curves of the [artemisinin:βCD + X]+ ion (X = H, Li, Na, K) showed a decreased stability of the ion complex with increasing cation size. Empirical CCS measurements of the [artemisinin:βCD + Li]+ ion correlated with predicted CCS values from the low-energy theoretical structures of the drug incorporated within the βCD cavity, providing further evidence that gas-phase inclusion complexes are formed in these experiments. Taken together, this work demonstrates the utility of combining analytical information from IM-MS, MS/MS, and computational approaches in interpreting the presence of gas-phase inclusion phenomena.
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Affiliation(s)
- Emanuel Zlibut
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235-1822, United States
| | - Jody C May
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235-1822, United States
| | - Yansheng Wei
- Worldwide Research, Development & Medical, Pfizer, Inc., Lake Forest, Illinois 60045, United States
| | - Dennis Gessmann
- Worldwide Research, Development & Medical, Pfizer, Inc., Lake Forest, Illinois 60045, United States
| | - Constance S Wood
- Worldwide Research, Development & Medical, Pfizer, Inc., Lake Forest, Illinois 60045, United States
| | - Bryan A Bernat
- Worldwide Research, Development & Medical, Pfizer, Inc., Lake Forest, Illinois 60045, United States
| | - Teresa E Pugh
- Pfizer, R&D UK Ltd, PSSM ARD, Sandwich CT13 9NJ, U.K
| | | | | | - Eric Dybeck
- Worldwide Research, Development & Medical, Pfizer, Inc., Cambridge, Massachusetts 02139, United States
| | - John A McLean
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235-1822, United States
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3
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Yang S, Wu F, Yu F, Gu L, Wang H, Liu Y, Chu Y, Wang F, Fang X, Ding CF. Distinction of chiral penicillamine using metal-ion coupled cyclodextrin complex as chiral selector by trapped ion mobility-mass spectrometry and a structure investigation of the complexes. Anal Chim Acta 2021; 1184:339017. [PMID: 34625257 DOI: 10.1016/j.aca.2021.339017] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 08/10/2021] [Accepted: 08/30/2021] [Indexed: 10/20/2022]
Abstract
Penicillamine (Pen) is a common chiral drug that is obtained from penicillin. Between the two enantiomers of Pen, only D-Pen can be used to treat cystinuria and rheumatoid arthritis while L-Pen is toxic. Therefore, it requires great efforts for the research of the rigorous analysis and distinction of the two enantiomers. The non-covalent combination of chiral molecules and chiral selectors (CSs) has been proved as a unique strategy for chiral distinction by ion mobility spectrometry in coupling with -mss spectrometry (IM-MS). Here, we developed a simple method to distinguish D, L-Pen by using special CSs for IM-MS separation. The CSs utilized here include cyclodextrins (CD) and linear chain oligosaccharides plus metal ions. We found that non-covalent complexes [Pen+β-CD + Li]+ could be easily formed by electrospray ionization of the mixture of the solution, and the chirality of Pen could be effectively recognized by measuring their mobilities due to the different collision cross collision sections of [D-Pen+β-CD + Li]+ and [L-Pen+β-CD + Li]+. A detailed analysis of [Pen+β-CD + Li]+ was then conducted by the optical rotation measurements and NMR experiments to reveal their structural differences. Furthermore, DFT calculation showed the differences of molecular conformation between the complexes. The results provide a new powerful method for fast analysis and recognition of chirality of Pen compounds by IM-MS.
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Affiliation(s)
- Shutong Yang
- Department of Chemistry, Fudan University, Shanghai, 200438, China
| | - Fangling Wu
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Fanzhen Yu
- Department of Chemistry, Fudan University, Shanghai, 200438, China
| | - Liancheng Gu
- Department of Chemistry, Fudan University, Shanghai, 200438, China
| | - Huanhuan Wang
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Yiyi Liu
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Yanqiu Chu
- Department of Chemistry, Fudan University, Shanghai, 200438, China.
| | - Fengyan Wang
- Department of Chemistry, Fudan University, Shanghai, 200438, China
| | - Xiang Fang
- Institute of Metrology, Beijing, 100084, China.
| | - Chuan-Fan Ding
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
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4
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Rabus JM, Pellegrinelli RP, Khodr AHA, Bythell BJ, Rizzo TR, Carrascosa E. Unravelling the structures of sodiated β-cyclodextrin and its fragments. Phys Chem Chem Phys 2021; 23:13714-13723. [PMID: 34128027 PMCID: PMC8220536 DOI: 10.1039/d1cp01058a] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 06/05/2021] [Indexed: 12/29/2022]
Abstract
We present cryogenic infrared spectra of sodiated β-cyclodextrin [β-CD + Na]+, a common cyclic oligosaccharide, and its main dissociation products upon collision-induced dissociation (CID). We characterize the parent ions using high-resolution ion mobility spectrometry and cryogenic infrared action spectroscopy, while the fragments are characterized by their mass and cryogenic infrared spectra. We observe sodium-cationized fragments that differ in mass by 162 u, corresponding to Bn/Zm ions. For the m/z 347 product ion, electronic structure calculations are consistent with formation of the lowest energy 2-ketone B2 ion structure. For the m/z 509 product ion, both the calculated 2-ketone B3 and the Z3 structures show similarities with the experimental spectrum. The theoretical structure most consistent with the spectrum of the m/z 671 ions is a slightly higher energy 2-ketone B4 structure. Overall, the data suggest a consistent formation mechanism for all the observed fragments.
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Affiliation(s)
- Jordan M Rabus
- Department of Chemistry and Biochemistry, Ohio University, 391 Clippinger Laboratories, Athens, Ohio 45701, USA
| | - Robert P Pellegrinelli
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCPM, Station 6, CH-1015 Lausanne, Switzerland.
| | - Ali Hassan Abi Khodr
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCPM, Station 6, CH-1015 Lausanne, Switzerland.
| | - Benjamin J Bythell
- Department of Chemistry and Biochemistry, Ohio University, 391 Clippinger Laboratories, Athens, Ohio 45701, USA
| | - Thomas R Rizzo
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCPM, Station 6, CH-1015 Lausanne, Switzerland.
| | - Eduardo Carrascosa
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCPM, Station 6, CH-1015 Lausanne, Switzerland.
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5
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Hao B, Ren L, Huang B, Tang X, Cheng H, Yan D, Li Y, Cao A, Ouyang C, Wang Q. 2-Hydroxypropyl-β-cyclodextrin encapsulates dimethyl disulfide producing a controlled release formulation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145293. [PMID: 33940723 DOI: 10.1016/j.scitotenv.2021.145293] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/24/2020] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
Dimethyl disulfide (DMDS), a soil fumigant, is an effective, broad-spectrum compound that often replaces bromomethane (MB) in the prevention and treatment of soil-borne diseases. However, the disadvantages of DMDS include toxicity, volatility, pungent odor, risk of human exposure, and environmental pollution. Cyclodextrin (CD) has been widely used as a carrier of chemicals in many industries due to its functional advantages and safety. In this study, a DMDS-controlled release formulation was developed by encapsulating DMDS in the cavity of 2-hydroxypropyl-β-cyclodextrin (HP-β-CD). This formulation reduced DMDS usage and production costs. Orthogonal experimental design, Fourier transform infrared (FT-IR), Scanning electron microscopy (SEM), Thermal gravity analysis (TGA) characterization, efficacy comparison, safety, and other aspects of the evaluation showed that under the best preparation conditions, the encapsulation rate was 81.49%. The efficacy of DMDS@HP-β-CD was similar to unformulated DMDS. The efficacy duration of the formulation was about two times longer than DMDS, and it was safer to use. This study reveals a cyclodextrin-DMDS formulation with reduced toxicity, longer duration, environmental safety and sustainability.
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Affiliation(s)
- Baoqiang Hao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Lirui Ren
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Bin Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xiujun Tang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Hongyan Cheng
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Dongdong Yan
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yuan Li
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Aocheng Cao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Canbin Ouyang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Qiuxia Wang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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6
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Avilés-Moreno JR, Gámez F, Berden G, Martens J, Oomens J, Martínez-Haya B. Multipodal coordination and mobility of molecular cations inside the macrocycle valinomycin. Phys Chem Chem Phys 2020; 22:19725-19734. [DOI: 10.1039/d0cp02996c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Small cations (K+, NH4+) occupy the center of the valinomycin cavity. Bulkier cations like H4PO4+ stretch the valinomycin backbone, which adopts barrel-like and funnel-like configurations, depending on the dynamically varying position of the cation.
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Affiliation(s)
| | - Francisco Gámez
- Department of Applied Physical Chemistry
- Universidad Autónoma de Madrid
- Madrid
- Spain
| | - Giel Berden
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525ED Nijmegen
- The Netherlands
| | - Jonathan Martens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525ED Nijmegen
- The Netherlands
| | - Jos Oomens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525ED Nijmegen
- The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- 41013 Seville
- Spain
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7
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2013-2014. MASS SPECTROMETRY REVIEWS 2018; 37:353-491. [PMID: 29687922 DOI: 10.1002/mas.21530] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 11/29/2016] [Indexed: 06/08/2023]
Abstract
This review is the eighth update of the original article published in 1999 on the application of Matrix-assisted laser desorption/ionization mass spectrometry (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2014. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation, and arrays. The second part of the review is devoted to applications to various structural types such as oligo- and poly- saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Much of this material is presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. © 2018 Wiley Periodicals, Inc. Mass Spec Rev 37:353-491, 2018.
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Affiliation(s)
- David J Harvey
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Roosevelt Drive, Oxford, OX3 7FZ, United Kingdom
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8
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Xu C, He N, Li Z, Chu Y, Ding CF. Exploring halide anion affinities to native cyclodextrins by mass spectrometry and molecular modelling. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2018; 24:269-278. [PMID: 29271243 DOI: 10.1177/1469066717748658] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The binding affinities of cyclodextrins complexation with chlorine (Cl-), bromine (Br-) and iodine (I-), were measured by mass spectrometric titrimetry, and the fitting of the binding constants was based on the concentration measurement of the cyclodextrin equilibrium. The binding constants (lg Ka) for α-, β- or γ-cyclodextrin with Cl- were 3.99, 4.03 and 4.11, respectively. The gas-phase binding affinity of halide anions for native cyclodextrins was probed by collision-induced dissociation. In collision-induced dissociation, the centre-of-mass frame energy results revealed that in the gas phase, for the same type of cyclodextrin, the stability of the complexes decreased in order: Cl > Br > I, and for the same halide anion, the binding stability of the complex with α-, β- or γ-cyclodextrin decreased in the order: γ-cyclodextrin >β-cyclodextrin > α-cyclodextrin. The density functional theory calculations showed that halide anion binding on the primary face had a lower energy than the secondary face and hydrogen bonding was the main driving force for complex formation. The higher stability of the γ-cyclodextrin complex with the Cl anion can be attributed to the higher charge density of the Cl anion and better flexibility of γ-cyclodextrin.
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Affiliation(s)
- Chongsheng Xu
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis & Innovative Materials, Fudan University, Shanghai, China
| | - Nan He
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis & Innovative Materials, Fudan University, Shanghai, China
| | - Zhenhua Li
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis & Innovative Materials, Fudan University, Shanghai, China
| | - Yanqiu Chu
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis & Innovative Materials, Fudan University, Shanghai, China
| | - Chuan-Fan Ding
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis & Innovative Materials, Fudan University, Shanghai, China
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9
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Angelova SE, Nikolova VK, Dudev TM. Determinants of the host-guest interactions between α-, β- and γ-cyclodextrins and group IA, IIA and IIIA metal cations: a DFT/PCM study. Phys Chem Chem Phys 2017; 19:15129-15136. [PMID: 28561079 DOI: 10.1039/c7cp01253e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The most widely used native cyclodextrins are α-, β- and γ-cyclodextrins containing six, seven or eight α-d-glucopyranoside units in the ring, respectively. Although the ligation properties of these host molecules have been extensively studied, a number of questions regarding their metal binding and selectivity remain unaddressed: to what extent do the size and flexibility of the host α-, β- and γ-cyclodextrins influence their metal affinity/selectivity? Which metal is the most preferred binding partner of α-, β- and γ-cyclodextrins? How do the charge, size and preferred coordination number of the metal cation shape its interactions with the host cyclodextrin? Can the guest metal cation inflict structural alterations in the host molecule and, if so, how do these changes correlate with the metal's properties? In the present study, by employing density functional theory (DFT) calculations combined with polarizable continuum model (PCM) computations, we try to answer these questions by evaluating the thermodynamic parameters of the IA, IIA and IIIA group metal binding to α, β- and γ-cyclodextrins. We assess how the interaction between the two binding partners depends on (1) the size, valence state and preferred coordination number of the guest metal cations, (2) the size and flexibility of the host molecule, and (3) the dielectric properties of the environment. The series of group IA (Na+ and Rb+), IIA (Mg2+ and Sr2+) and IIIA (Al3+ and In3+) metal cations have been chosen for the task as they allow us to study the effect of various metal parameters (variable charge, ionic radius and coordination number) on the strength and form of the interactions with the host cyclodextrins.
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Affiliation(s)
- S E Angelova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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10
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Martínez-Haya B, Avilés-Moreno JR, Hamad S, Elguero J. On the ionophoric selectivity of nonactin and related macrotetrolide derivatives. Phys Chem Chem Phys 2017; 19:1288-1297. [DOI: 10.1039/c6cp05324f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microhydration determines the cation affinities of nactin macrocyles in aqueous–organic extraction processes.
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Affiliation(s)
- Bruno Martínez-Haya
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | | | - Said Hamad
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | - José Elguero
- Instituto de Química Médica
- CSIC
- E-28006 Madrid
- Spain
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11
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Rodrigo F, Gámez F, Avilés-Moreno JR, Pedrosa JM, Martínez-Haya B. Enhanced cation recognition by a macrocyclic ionophore at the air–solution interface probed by mass spectrometry. Phys Chem Chem Phys 2016; 18:3497-503. [DOI: 10.1039/c5cp06671a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cation binding selectivity of a benchmark calixarene is enhanced at the air–solution interface, as demonstrated by a novel mass spectrometry method.
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Affiliation(s)
- Francisco Rodrigo
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | - Francisco Gámez
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | | | - José M. Pedrosa
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | - Bruno Martínez-Haya
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
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12
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Gámez F, Hortal AR, Hurtado P, Avilés-Moreno JR, Hamad S, Martínez-Haya B. Binding Selectivity of Macrocycle Ionophores in Ionic Liquids versus Aqueous Solution and Solvent-free Conditions. Chemphyschem 2015; 16:3672-80. [PMID: 26346407 DOI: 10.1002/cphc.201500477] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Indexed: 11/05/2022]
Abstract
The understanding of supramolecular recognition in room-temperature ionic liquids (RTILs) is key to develop the full potential of these materials. In this work, we provide insights into the selectivity of the binding of alkali metal cations by standard cyclodextrin and calixarene macrocycles in RTILs. A direct laser desorption/ionization mass spectrometry approach is employed to determine the relative abundances of the inclusion complexes formed through competitive binding in RTIL solutions. The results are compared with the binding selectivities measured under solvent-free conditions and in water/methanol solutions. Cyclodextrins and calixarenes in which the peripheral OH groups are substituted by bulkier side groups preferentially bind to Cs(+) . Such specific ionophoric behavior is substantially enhanced by solvation effects in the RTIL. This finding is rationalized with the aid of quantum mechanical calculations, in terms of the conformational features and steric interactions that drive the solvation of the inclusion complexes by the bulky RTIL counterions.
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Affiliation(s)
- Francisco Gámez
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Ana R Hortal
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Paola Hurtado
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Juan R Avilés-Moreno
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Said Hamad
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain.
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13
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Przybylski C, Bonnet V, Cézard C. Probing the common alkali metal affinity of native and variously methylated β-cyclodextrins by combining electrospray-tandem mass spectrometry and molecular modeling. Phys Chem Chem Phys 2015; 17:19288-305. [PMID: 26138713 DOI: 10.1039/c5cp02895g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In the study herein, we investigated the solution and gas phase affinity of native and variously methylated β-cyclodextrins (CDs) as hosts towards three common alkali metals as guests namely lithium, sodium and potassium. For this purpose, two complementary approaches have been employed: electrospray-tandem mass spectrometry (ESI-MS/MS) with two energetic regimes: Collision Induced Dissociation (CID) and Higher Collision Dissociation (HCD), respectively, and DFT molecular modeling. These approaches have been achieved by taking into account the interaction of either one or two alkali metals with the host molecules. The results showed a good agreement between experimental and theoretical data. It was demonstrated that increasing the methylation degree strengthened the gas phase affinity towards all studied alkali metals. Furthermore, it was established that the cation selectivity was Na(+) > Li(+) > K(+) and Li(+) > Na(+) > K(+) for the solution and gas phase, respectively.
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Affiliation(s)
- Cédric Przybylski
- Université d'Evry-Val-d'Essonne, Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, CNRS UMR 8587, Bâtiment Maupertuis, Bld F. Mitterrand, F-91025 Evry, France.
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14
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Wei W, Chu Y, Wang R, He X, Ding C. Quantifying non-covalent binding affinity using mass spectrometry: a systematic study on complexes of cyclodextrins with alkali metal cations. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:927-936. [PMID: 26407307 DOI: 10.1002/rcm.7181] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 02/07/2015] [Accepted: 02/23/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE To date, the quantification of binding affinities for non-covalent complexes between cyclodextrin (CD) and alkali cations including Li(+) , Na(+) , K(+) , Rb(+) , and Cs(+) has not been investigated in detail by electrospray ionization mass spectrometry (ESI-MS) due to the unknown ionization efficiencies of the different species. In this study, the binding constants of CD-Cs(+) complexes were determined by an improved mass spectrometric titration methodology, which was based only on the peak intensities of equilibrium CD. Hence, the discrepancy of ionization efficiencies of CD, alkaline cation and their complex would not affect the measurement. Then the obtained lgKa values were provided as references for competitive ESI-MS. The binding constants for complexes of α-, β- or γ-CD with Li(+) , Na(+) , K(+) and Rb(+) could be derived directly and quickly. METHODS The lgKa values between α-, β- or γ-CD and Cs(+) data were processed by curve fitting. These lgKa values were provided as references for competitive ESI-MS. In addition, linear fit equations for complexes of α-, β- or γ-CD with Cs(+) were derived. Through the linear fit equations of competitive ESI-MS, the binding constants for complexes of Li(+) , Na(+) , K(+) and Rb(+) with α-, β- or γ-CD were acquired. RESULTS Results showed that the binding constant (lgKa ) values for the complexes of Cs(+) with α-, β- and γ-cyclodextrins were 3.94, 3.88 and 3.80, respectively, revealing that the binding strength decreased with the increase in diameter of cyclodextrins. The competitive ESI-MS results showed a clear trend of decreasing affinity for complexes of cyclodextrins in the order of Li(+) , Na(+) , K(+) , Rb(+) . CONCLUSIONS The binding constants of non-covalent cyclodextrin-alkali cation complexes have been systematically studied by an improved mass spectrometric titration and competitive ESI-MS. Also, the structural features of the complexes were discussed. Our results are valuable for better understanding of mechanisms driving inclusion chemistry under well-defined conditions.
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Affiliation(s)
- Wanghui Wei
- Laser Chemistry Institute, Chemistry Department, Fudan University, Shanghai, 200433, China
| | - Yanqiu Chu
- Physical Chemistry Institute, Chemistry Department, Fudan University, Shanghai, 200433, China
| | - Rizhi Wang
- Department of Material Engineering, University of British Columbia, Canada
| | - Xiaodan He
- Physical Chemistry Institute, Chemistry Department, Fudan University, Shanghai, 200433, China
| | - Chuanfan Ding
- Laser Chemistry Institute, Chemistry Department, Fudan University, Shanghai, 200433, China
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He X, Wei W, Chu Y, Liu Z, Ding C. Investigation on Non‐covalent Complexes of Cyclodextrins with Li+ in Gas Phase by Mass Spectrometry. CHINESE J CHEM PHYS 2013. [DOI: 10.1063/1674-0068/26/03/287-294] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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