1
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Rouquet E, Dupont J, Lepere V, Garcia GA, Nahon L, Zehnacker A. Conformer-Selective Photoelectron Circular Dichroism. Angew Chem Int Ed Engl 2024; 63:e202401423. [PMID: 38442011 DOI: 10.1002/anie.202401423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/04/2024] [Accepted: 03/05/2024] [Indexed: 03/07/2024]
Abstract
Conformational flexibility and chirality both play a key role in molecular recognition. It is therefore very useful to develop spectroscopic methods that simultaneously probe both properties. It has been theoretically predicted that photoelectron circular dichroism (PECD) should be very sensitive to conformational isomerism. However, experimental proof has been less forthcoming and only exists for a very few favorable cases. Here, we present a new PECD scheme based on resonance-enhanced two-photon ionization (RE2PI) using UV/Vis nanosecond laser excitations. The spectral resolution obtained thereby guarantees conformer-selectivity by inducing resonant conformer-specific ππ* S1←S0 transitions. We apply this experimental scheme to the study of chiral 1-indanol, which exists in two conformers linked by a ring inversion and defined by the position of the hydroxyl group, namely axial and equatorial. We show that the PECD of the equatorial and axial forms considerably differ in sign, magnitude and shape. We also discuss the influence of the total ionization energy, vibronic excitation of intermediate and final states, and relative polarization of the excitation and ionization lasers. Conformer-specificity adds a new dimension to the applications of PECD in analytical chemistry addressing now the general case of floppy systems.
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Affiliation(s)
- Etienne Rouquet
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192, Gif sur Yvette, France
| | - Jennifer Dupont
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
| | - Valeria Lepere
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
| | - Gustavo A Garcia
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192, Gif sur Yvette, France
| | - Laurent Nahon
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192, Gif sur Yvette, France
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
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2
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Dupont J, Hartwig B, Le Barbu-Debus K, Lepere V, Guillot R, Suhm MA, Zehnacker A. Homochiral vs. heterochiral preference in chiral self-recognition of cyclic diols. Phys Chem Chem Phys 2024; 26:10610-10621. [PMID: 38506638 DOI: 10.1039/d4cp00351a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
The structure and clustering propensity of a chiral derivative of cis-1,2-cyclohexanediol, namely, 1-phenyl-cis-1,2-cyclohexanediol (cis-PCD), has been studied under supersonic expansion conditions by combining laser spectroscopy with quantum chemistry calculations. The presence of the phenyl substituent induces conformational locking relative to cis-1,2-cyclohexanediol (cis-CD), and only one conformer of the bare molecule is observed by both Raman and IR-UV double resonance spectroscopy. The homochiral preference inferred for the dimer formation at low enough temperature is in line with the formation of a conglomerate in the solid state. The change in clustering propensity in cis-PCD relative to trans-1,2-cyclohexanediol (trans-CD), which shows heterochiral preference, is explained by the presence of the phenyl substituent rather than the effect of cis-trans isomerism. Indeed the transiently chiral cis-CD also forms preferentially heterodimers, whose structure is very close to that of the corresponding trans-CD dimer.
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Affiliation(s)
- Jennifer Dupont
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, rue André Rivière, Université Paris-Saclay, F-91405 Orsay, France.
| | - Beppo Hartwig
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstr. 6, 37077 Göttingen, Germany
| | - Katia Le Barbu-Debus
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, rue André Rivière, Université Paris-Saclay, F-91405 Orsay, France.
| | - Valeria Lepere
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, rue André Rivière, Université Paris-Saclay, F-91405 Orsay, France.
| | - Regis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), 17 Av. des Sciences Université Paris-Saclay, F-91405 Orsay, France
| | - Martin A Suhm
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstr. 6, 37077 Göttingen, Germany
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, rue André Rivière, Université Paris-Saclay, F-91405 Orsay, France.
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3
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Yoshizawa K, Hirata K, Ishiuchi SI, Fujii M, Zehnacker A. Do Stereochemical Effects Overcome a Charge-Induced Perturbation in Isolated Protonated Cyclo(Tyr-Tyr)? J Phys Chem A 2022; 126:6387-6394. [PMID: 36098637 DOI: 10.1021/acs.jpca.2c03789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two diastereomers of the protonated diketopiperazine (DKP) dipeptide cyclo(Tyr-Tyr), namely, cyclo(LTyr-LTyr)H+ and cyclo(LTyr-DTyr)H+, are studied in a cryogenic ion trap by means of IR photodissociation spectroscopy combined with quantum chemical calculations. The two diastereomers have similar structures in which one of the rings is folded over the DKP ring and the other one is extended in a trans geometry, allowing a strong OH+···π interaction to take place. This contrasts to the observation of a stacked geometry for neutral cyclo(LTyr-LTyr) only under supersonic expansion conditions that do not exist for cyclo(LTyr-DTyr). In the protonated form, the strength of the OH+···π interaction is different for the two diastereomers, resulting in a ∼110 cm-1 difference in the ν(OH+) frequency and a smaller but clearly identifiable difference in the protonated amide ν(NH) frequency. Stereochemical effects are therefore still evidenced despite the strong perturbation due to the excess charge.
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Affiliation(s)
- Koki Yoshizawa
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.,School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Keisuke Hirata
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Shun-Ichi Ishiuchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Masaaki Fujii
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.,School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan.,International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
| | - Anne Zehnacker
- International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.,Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, Orsay F-91405, France
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4
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Le Barbu-Debus K, Pérez-Mellor A, Lepère V, Zehnacker A. How change in chirality prevents β-amyloid type interaction in a protonated cyclic dipeptide dimer. Phys Chem Chem Phys 2022; 24:19783-19791. [PMID: 35969161 DOI: 10.1039/d2cp03110h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The protonated dimers of the diketopiperazine dipeptide cyclo (LPhe-LHis) and cyclo (LPhe-DHis) are studied by laser spectroscopy combined with mass spectrometry to shed light on the influence of stereochemistry on the clustering propensity of cyclic dipeptides. The marked spectroscopic differences experimentally observed in the hydride stretch region are well accounted for by the results of DFT calculations. Both diastereomeric protonated dimers involve a strong ionic hydrogen bond from the protonated imidazole ring of one monomer to the neutral imidazole nitrogen of the other. While this strong interaction is accompanied by a single NH⋯O hydrogen bond between the amide functions of the two moieties for the protonated dimer of cyclo (LPhe-DHis), that of cyclo (LPhe-LHis) involves two NH⋯O interactions, forming the motif of an antiparallel β sheet. Therefore, a change in chirality of the residue prevents the formation of the β sheet pattern observed in the amyloid type aggregation. These results emphasize the peculiar role of the histidine residue in peptide structure and interaction.
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Affiliation(s)
- Katia Le Barbu-Debus
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France.
| | - Ariel Pérez-Mellor
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France.
| | - Valéria Lepère
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France.
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France.
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5
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Fernández-Maestre R, Doerr M. On the separation of enantiomers by drift tube ion mobility spectrometry. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:3011-3020. [PMID: 35916141 DOI: 10.1039/d2ay00946c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Racemic mixtures of twelve common α-amino acids and three chiral drugs were tested for the separation of their enantiomers by drift tube ion mobility spectrometry (IMS)-quadrupole mass spectrometry (QMS) by introducing chiral selectors into the buffer gas of the IMS instrument. (R)-α-(Trifluoromethyl)benzyl alcohol, (L)-ethyl lactate, methyl (S)-2-chloropropionate, and the R and S enantiomers of 2-butanol and 1-phenyl ethanol were evaluated as chiral selectors. Experimental conditions were varied during the tests, including buffer gas temperature, concentration and type of chiral selectors, analyte concentration, electrospray (ESI) voltage, ESI solvent pH, and buffer gas flow rate. The individual enantiomers yielded the same drift times and the racemic mixtures could not be separated. Energy calculations of the chiral selector-ion interactions showed that these separations are unlikely using 2-butanol as a chiral selector but they might be theoretically feasible depending on the chiral selector nature and the type of enantiomers. Several plausible explanations for not achieving separations were analyzed. Recommendations for potential enantiomer separations by IMS are proposed.
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Affiliation(s)
- Roberto Fernández-Maestre
- Departamento de Quimica, Universidad de Cartagena, Campus de San Pablo, Cartagena, Colombia.
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe Sh. 31, Moscow, 115409, Russia
| | - Markus Doerr
- Universidad Industrial de Santander, Cra 27 Calle 9, Bucaramanga, Colombia.
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6
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Dupont J, Lepère V, Zehnacker A, Hartweg S, Garcia GA, Nahon L. Photoelectron Circular Dichroism as a Signature of Subtle Conformational Changes: The Case of Ring Inversion in 1-Indanol. J Phys Chem Lett 2022; 13:2313-2320. [PMID: 35245057 DOI: 10.1021/acs.jpclett.2c00074] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chirality plays a fundamental role in the molecular recognition processes. Molecular flexibility is also crucial in molecular recognition, allowing the interacting molecules to adjust their structures and hence optimize the interaction. Methods probing simultaneously chirality and molecular conformation are therefore crucially needed. Taking advantage of a possible control in the gas phase of the conformational distribution between the equatorial and axial conformers resulting from a ring inversion in jet-cooled 1-indanol, we demonstrate here the sensitivity of valence-shell photoelectron circular dichroism (PECD) to both chirality and subtle conformational changes, in a case where the photoelectron spectra of the two conformers are identical. For the highest occupied orbital, we observe a dramatic inversion of the PECD-induced photoelectron asymmetries, while the photoionization cross-section and usual anisotropy (β) parameter are completely insensitive to conformational isomerism. Such a sensitivity is a major asset for the ongoing developments of PECD-based techniques as a sensitive chiral (bio)chemical analytical tool in the gas phase.
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Affiliation(s)
- Jennifer Dupont
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France
| | - Valéria Lepère
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France
| | - Sebastian Hartweg
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192 Gif sur Yvette, France
| | - Gustavo A Garcia
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192 Gif sur Yvette, France
| | - Laurent Nahon
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192 Gif sur Yvette, France
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7
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Wang H, Heger M, Al-Jabiri MH, Xu Y. Vibrational Spectroscopy of Homo- and Heterochiral Amino Acid Dimers: Conformational Landscapes. Molecules 2021; 27:38. [PMID: 35011269 PMCID: PMC8746356 DOI: 10.3390/molecules27010038] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/15/2021] [Accepted: 12/19/2021] [Indexed: 12/19/2022] Open
Abstract
The homo- and heterochiral protonated dimers of asparagine with serine and with valine were investigated using infrared multiple-photon dissociation (IRMPD) spectroscopy. Extensive quantum-chemical calculations were used in a three-tiered strategy to screen the conformational spaces of all four dimer species. The resulting binary structures were further grouped into five different types based on their intermolecular binding topologies and subunit configurations. For each dimer species, there are eight to fourteen final conformational geometries within a 10 kJ mol-1 window of the global minimum structure for each species. The comparison between the experimental IRMPD spectra and the simulated harmonic IR features allowed us to clearly identify the types of structures responsible for the observation. The monomeric subunits of the observed homo- and heterochiral dimers are compared to the corresponding protonated/neutral amino acid monomers observed experimentally in previous IRMDP/rotational spectroscopic studies. Possible chirality and kinetic influences on the experimental IRMPD spectra are discussed.
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Affiliation(s)
| | | | | | - Yunjie Xu
- Department of Chemistry, University of Alberta, Edmonton, Alberta, AB T6G 2G2, Canada; (H.W.); (M.H.); (M.H.A.-J.)
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8
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Le Barbu-Debus K, Zehnacker A. Competition between inter and intramolecular hydrogen bond evidenced by vibrational circular dichroism spectroscopy: The case of (1S,2R)-(-)-cis-1-amino-2-indanol. Chirality 2021; 33:858-874. [PMID: 34570370 DOI: 10.1002/chir.23362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 08/29/2021] [Accepted: 08/31/2021] [Indexed: 02/06/2023]
Abstract
The infrared (IR) absorption and vibrational circular dichroism (VCD) spectra of an intramolecularly hydrogen-bonded chiral amino-alcohol, (1S,2R)-(-)-cis-1-amino-2-indanol, are studied in DMSO-d6 . The spectra are simulated at the density functional theory (DFT) level within the frame of the cluster-in-the-liquid model. Both IR and VCD spectra show a clear signature of the formation of intermolecular hydrogen bonds at the detriment of the intramolecular OH … N interaction present in the isolated molecule. Two solvent molecules are necessary to reproduce the experimental spectra. Whereas the first DMSO molecule captures the main spectral modifications due to hydrogen bond formation between the solute and the solvent, the second DMSO molecule is necessary for a good description of the Boltzmann contribution of the different complexes, based on their Gibbs free energy.
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Affiliation(s)
- Katia Le Barbu-Debus
- Institut des Sciences Moléculaires d'Orsay, Université Paris-Saclay, Orsay, France
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay, Université Paris-Saclay, Orsay, France
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9
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Murashima H, Fujihara A. Quantification of monosaccharide enantiomers using optical properties of hydrogen-bonded tryptophan. Anal Biochem 2021; 619:114151. [PMID: 33684343 DOI: 10.1016/j.ab.2021.114151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/22/2021] [Accepted: 03/01/2021] [Indexed: 10/22/2022]
Abstract
Chiral recognition between amino acids and monosaccharides in the gas phase was investigated as a model for chemical evolution in interstellar molecular clouds. Ultraviolet (UV) photodissociation spectra and product ion spectra of cold gas-phase hydrogen-bonded clusters of protonated tryptophan (Trp) and a pentose, including ribose and arabinose, were obtained using a tandem mass spectrometer equipped with an electrospray ionization source and a temperature-controlled ion trap. The relative intensity of the signal arising from the S1-S0 transition of protonated Trp observed at approximately 285 nm in the UV photodissociation spectrum of homochiral H+(d-Trp)(d-ribose) was significantly higher than that of heterochiral H+(l-Trp)(d-ribose), corresponding to the ππ* state of the Trp indole ring. Optical properties of Trp in the clusters induced by 285-nm photoexcitation were applied to the identification and quantification of pentose enantiomers in solution. Pentose enantiomeric excess in solution was determined from relative abundances observed in a single product ion spectrum of 285-nm photoexcited hydrogen-bonded clusters of H+(l-Trp) and pentose. A mixture of two pentoses could also be quantified by this method. The geometric and electronic structures of Trp enable recognition of biological molecules through hydrogen bonding.
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Affiliation(s)
- Hiromori Murashima
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Osaka, 599-8531, Japan
| | - Akimasa Fujihara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Osaka, 599-8531, Japan.
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10
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Domingos SR, Pérez C, Kreienborg NM, Merten C, Schnell M. Dynamic chiral self-recognition in aromatic dimers of styrene oxide revealed by rotational spectroscopy. Commun Chem 2021; 4:32. [PMID: 36697526 PMCID: PMC9814401 DOI: 10.1038/s42004-021-00468-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/01/2021] [Indexed: 01/28/2023] Open
Abstract
Chiral molecular recognition is a pivotal phenomenon in biomolecular science, governed by subtle balances of intermolecular forces that are difficult to quantify. Non-covalent interactions involving aromatic moieties are particularly important in this realm, as recurring motifs in biomolecular aggregation. In this work, we use high-resolution broadband rotational spectroscopy to probe the dynamic conformational landscape enclosing the self-pairing topologies of styrene oxide, a chiral aromatic system. We reach a definite assignment of four homochiral and two heterochiral dimers using auxiliary quantum chemistry calculations as well as structure-solving methods based on experimental isotopic information. A complete picture of the dimer conformational space is obtained, and plausible routes for conformational relaxation are derived. Molecular structures are discussed in terms of conformational flexibility, the concerted effort of weak intermolecular interactions, and their role in the expression of the molecular fit.
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Affiliation(s)
- Sérgio R. Domingos
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, Hamburg, 22607 Germany ,grid.8051.c0000 0000 9511 4342Present Address: CFisUC, Department of Physics, University of Coimbra, Coimbra, 3004-516 Portugal
| | - Cristóbal Pérez
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, Hamburg, 22607 Germany
| | - Nora M. Kreienborg
- grid.5570.70000 0004 0490 981XRuhr-Universität Bochum, Fakultät für Chemie und Biochemie, Organische Chemie II, Universitätsstraße 150, Bochum, 44801 Germany
| | - Christian Merten
- grid.5570.70000 0004 0490 981XRuhr-Universität Bochum, Fakultät für Chemie und Biochemie, Organische Chemie II, Universitätsstraße 150, Bochum, 44801 Germany
| | - Melanie Schnell
- grid.7683.a0000 0004 0492 0453Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, Hamburg, 22607 Germany ,grid.9764.c0000 0001 2153 9986Institut für Physikalische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 1, Kiel, 24118 Germany
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11
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Hirata K, Mori Y, Ishiuchi SI, Fujii M, Zehnacker A. Chiral discrimination between tyrosine and β-cyclodextrin revealed by cryogenic ion trap infrared spectroscopy. Phys Chem Chem Phys 2020; 22:24887-24894. [PMID: 32914820 DOI: 10.1039/d0cp02968h] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Complexes of permethylated β-cyclodextrin (β-MCD) with the two enantiomers of protonated tyrosine (l- and d-TyrH+) are studied by cryogenic ion trap infrared photo-dissociation spectroscopy. The vibrational spectra in the OH/NH stretch and fingerprint regions are assigned based on density functional theory calculations. The spectrum of both l- and d-TyrH+ complexes contains features characteristic of a first structure with ammonium and acid groups of the amino acid simultaneously interacting with the β-MCD, the phenolic OH remaining free. A second structure involving additional interaction between the phenolic OH and the β-MCD is observed only for the complex with d-TyrH+. The larger abundance of the d-TyrH+ complex in the mass spectrum is tentatively explained in terms of (1) better insertion of d-TyrH+ within the cavity with the hydrophobic aromatic moiety less exposed to hydrophilic solvent molecules and (2) a stiff structure involving three interaction points, namely the ammonium, the phenolic OH and the carboxylic acid OH, which is not possible for the complex with l-TyrH+. The recognition process does not occur through size effects that induce complementarity to the host molecule but specific interactions. These results provide a comprehensive understanding of how the cyclodextrin recognises a chiral biomolecule.
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Affiliation(s)
- Keisuke Hirata
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.
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12
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Murashima H, Fujihara A. Wavelength dependence of chiral recognition using ions between photoexcited tryptophan and sugars. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110818] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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13
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Rebrov O, Poline M, Ryding MJ, Thomas RD, Uggerud E, Larsson M. Non-covalently bonded diastereomeric adducts of amino acids and (S)-1-phenylethanol in low-energy dissociative collisions. Mol Phys 2020. [DOI: 10.1080/00268976.2019.1615145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- O. Rebrov
- Department of Physics, AlbaNova University Center, Stockholm University, Stockholm, Sweden
| | - M. Poline
- Department of Physics, AlbaNova University Center, Stockholm University, Stockholm, Sweden
| | - M. J. Ryding
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, Oslo, Norway
| | - R. D. Thomas
- Department of Physics, AlbaNova University Center, Stockholm University, Stockholm, Sweden
| | - E. Uggerud
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, Oslo, Norway
| | - M. Larsson
- Department of Physics, AlbaNova University Center, Stockholm University, Stockholm, Sweden
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14
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Ben Nasr F, Alata I, Scuderi D, Lepère V, Brenner V, Jaïdane NE, Zehnacker A. Effects of complexation with sulfuric acid on the photodissociation of protonated Cinchona alkaloids in the gas phase. Phys Chem Chem Phys 2019; 21:15439-15451. [PMID: 31257399 DOI: 10.1039/c9cp01518c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of complexation with sulfuric acid on the photo-dissociation of protonated Cinchona alkaloids, namely cinchonidine (Cd), quinine (Qn) and quinidine (Qd), is studied by combining laser spectroscopy with quantum chemical calculations. The protonated complexes are structurally characterized in a room-temperature ion trap by means of infra-red multiple photon dissociation (IRMPD) spectroscopy in the fingerprint and the ν(XH) (X = C, N, O) stretch regions. Comparison with density functional theory calculations including dispersion (DFT-D) unambiguously shows that the complex consists of a doubly protonated Cinchona alkaloid strongly bound to a bisulfate HSO4- anion, which bridges the two protonated sites of the Cinchona alkaloid. UV excitation of the complex does not induce loss of specific photo fragments, in contrast to the protonated monomer or dimer, for which photo-specific fragments were observed. Indeed the UV-induced fragmentation pattern is identical to that observed in collision-induced dissociation experiments. Analysis of the nature of the first electronic transitions at the second order approximate coupled-cluster level (CC2) explains the difference in the behavior of the complex relative to the monomer or dimer towards UV excitation.
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Affiliation(s)
- Feriel Ben Nasr
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France. and Laboratoire de Spectroscopie Atomique, Moléculaire et Applications (LSAMA) Université de Tunis El Manar, LSAMA, Tunis 1060, Tunisia
| | - Ivan Alata
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France.
| | - Debora Scuderi
- Univ. Paris-Sud, Laboratoire de Chimie Physique, UMR 8000, and CNRS, Orsay, F-91405, France
| | - Valeria Lepère
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France.
| | | | - Nejm-Eddine Jaïdane
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications (LSAMA) Université de Tunis El Manar, LSAMA, Tunis 1060, Tunisia
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France.
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15
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Juanes M, Saragi RT, Caminati W, Lesarri A. The Hydrogen Bond and Beyond: Perspectives for Rotational Investigations of Non‐Covalent Interactions. Chemistry 2019; 25:11402-11411. [DOI: 10.1002/chem.201901113] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/15/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
| | - Rizalina T. Saragi
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
| | - Walther Caminati
- Dipartimento di Chimica “G. Ciamician”Università di Bologna Via Selmi 2 40126 Bologna Italy
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
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16
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Tamura M, Sekiguchi T, Ishiuchi SI, Zehnacker-Rentien A, Fujii M. Can the Partial Peptide SIVSF of the β 2-Adrenergic Receptor Recognize Chirality of the Epinephrine Neurotransmitter? J Phys Chem Lett 2019; 10:2470-2474. [PMID: 30840461 DOI: 10.1021/acs.jpclett.9b00184] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Chirality plays an essential role in biological molecular recognition, such as neurotransmission. Here, we applied electrospray-cold ion trap spectroscopy to complexes of a partial binding motif SIVSF of a β2-adrenergic receptor pocket with L- and D-epinephrine AdH+. The ultraviolet spectrum of the SIVSF-AdH+ complex changed drastically when L-AdH+ was replaced by its enantiomer. The isomer-selected infrared spectra revealed that D-AdH+ was bound to SIVSF by its protonated amino-group or a single catechol OH and induced nonhelical secondary structures of SIVSF. This is in sharp contrast to the helical SIVSF complex with L-AdH+, which is close to the natural binding structure with two catechol OHs binding in the receptor. This shows that a short pentapeptide SIVSF can distinguish the chirality of the ligand AdH+ as well as the receptor. This stereoselectivity is suggested to arise from an additional interaction involving the hydroxyl group on the chiral carbon.
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Affiliation(s)
- Masato Tamura
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , 226-8503 , Japan
- School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , Kanagawa 226-8501 , Japan
| | - Tsubasa Sekiguchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , 226-8503 , Japan
- School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , Kanagawa 226-8501 , Japan
| | - Shun-Ichi Ishiuchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , 226-8503 , Japan
- School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , Kanagawa 226-8501 , Japan
| | - Anne Zehnacker-Rentien
- Institut des Sciences Moléculaires d'Orsay (ISMO) , CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay , France
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , Japan
| | - Masaaki Fujii
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , 226-8503 , Japan
- School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , Kanagawa 226-8501 , Japan
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research , Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku , Yokohama , Japan
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17
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Corinti D, Maccelli A, Chiavarino B, Maitre P, Scuderi D, Bodo E, Fornarini S, Crestoni ME. Vibrational signatures of curcumin's chelation in copper(II) complexes: An appraisal by IRMPD spectroscopy. J Chem Phys 2019; 150:165101. [PMID: 31042893 DOI: 10.1063/1.5086666] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Curcumin (Cur) is a natural polyphenol with a wide spectrum of biological activities and appealing therapeutic potential. Herein, it has been delivered by electrospray ionization as gaseous protonated species, [Cur + H]+, and as a Cu(ii) complex, [Cu(Cur - H)]+, a promising antioxidant and radical scavenger. The gas phase structures were assayed by infrared multiple photon dissociation (IRMPD) spectroscopy in both the fingerprint (800-2000 cm-1) and hydrogen stretching (3100-3750 cm-1) ranges. Comparison between the experimental features and linear IR spectra of the lowest energy structures computed at the B3LYP/6-311+G(d,p) level reveals that bare [Cu(Cur - H)]+ exists in a fully planar and symmetric arrangement, where the metal interacts with the two oxygens of the syn-enolate functionality of deprotonated Cur and both OCH3 groups are engaged in H-bonding with the ortho OH. The effect of protonation on the energetic and geometric determinants of Cur has been explored as well, revealing that bare [Cur + H]+ may exist as a mixture of two close-lying isomers associated with the most stable binding motifs. The additional proton is bound to either the diketo or the keto-enol configuration of Cur, in a bent or nearly planar arrangement, respectively.
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Affiliation(s)
- Davide Corinti
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza," Piazzale Aldo Moro, 5, I-00185 Roma, Italy
| | - Alessandro Maccelli
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza," Piazzale Aldo Moro, 5, I-00185 Roma, Italy
| | - Barbara Chiavarino
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza," Piazzale Aldo Moro, 5, I-00185 Roma, Italy
| | - Philippe Maitre
- Laboratoire de Chimie Physique (UMR8000), CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay, France
| | - Debora Scuderi
- Laboratoire de Chimie Physique (UMR8000), CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay, France
| | - Enrico Bodo
- Dipartimento di Chimica, Università di Roma "La Sapienza," Piazzale Aldo Moro, 5, I-00185 Roma, Italy
| | - Simonetta Fornarini
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza," Piazzale Aldo Moro, 5, I-00185 Roma, Italy
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza," Piazzale Aldo Moro, 5, I-00185 Roma, Italy
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18
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Corinti D, Crestoni ME, Fornarini S, Pieper M, Niehaus K, Giampà M. An integrated approach to study novel properties of a MALDI matrix (4-maleicanhydridoproton sponge) for MS imaging analyses. Anal Bioanal Chem 2018; 411:953-964. [DOI: 10.1007/s00216-018-1531-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/22/2018] [Accepted: 11/29/2018] [Indexed: 02/02/2023]
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19
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Nguyen DT, Fujihara A. Chiral Recognition in Cold Gas-Phase Cluster Ions of Carbohydrates and Tryptophan Probed by Photodissociation. ORIGINS LIFE EVOL B 2018; 48:395-406. [PMID: 30953250 DOI: 10.1007/s11084-019-09574-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 03/19/2019] [Indexed: 12/20/2022]
Abstract
Chiral recognition between tryptophan (Trp) and carbohydrates such as D-glucose (D-Glc), methyl-α-D-glucoside (D-glucoside), D-maltose, and D-cellobiose in cold gas-phase cluster ions was investigated as a model for chemical evolution in interstellar molecular clouds using a tandem mass spectrometer containing a cold ion trap. The photodissociation mass spectra of cold gas-phase clusters that contained Na+, Trp enantiomers, and D-maltose showed that Na+(D-Glc) was formed via the glycosidic bond cleavage of D-maltose from photoexcited homochiral Na+(D-Trp)(D-maltose), while the dissociation did not occur in heterochiral Na+(L-Trp)(D-maltose). The enantiomer-selective dissociation was also observed in the case of D-cellobiose. The enantiomer-selective glycosidic bond cleavage of disaccharides suggested that photoexcited D-Trp could prevent chemical evolution of sugar chains from D-enantiomer of carbohydrates in molecular clouds. The spectra of gas-phase clusters that contained Na+, Trp enantiomers, and D-Glc indicated that enantiomer-selective protonation of L-Trp from D-Glc could induce enantiomeric excess via collision-activated dissociation of the protonated L-Trp. In the case of protonated clusters, photoexcited H+(L-Trp) dissociated via Cα-Cβ bond cleavage in the presence of D-Glc or D-glucoside, where the excited states of H+(L-Trp) contributed to the enantiomer-selective reaction in the clusters. These enantiomer selectivities in cold gas-phase clusters indicated that chirality of a molecule induced enantiomeric excess of other molecules via enantiomer-selective reactions in molecular clouds.
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Affiliation(s)
- Doan Thuc Nguyen
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Osaka, 599-8531, Japan
| | - Akimasa Fujihara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Osaka, 599-8531, Japan.
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20
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Alata I, Pérez-Mellor A, Ben Nasr F, Scuderi D, Steinmetz V, Gobert F, Jaïdane NE, Zehnacker-Rentien A. Does the Residues Chirality Modify the Conformation of a Cyclo-Dipeptide? Vibrational Spectroscopy of Protonated Cyclo-diphenylalanine in the Gas Phase. J Phys Chem A 2017; 121:7130-7138. [DOI: 10.1021/acs.jpca.7b06159] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ivan Alata
- Institut
des Sciences Moléculaires d’Orsay, CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France
| | - Ariel Pérez-Mellor
- Institut
des Sciences Moléculaires d’Orsay, CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France
| | - Feriel Ben Nasr
- Institut
des Sciences Moléculaires d’Orsay, CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France
- Laboratoire
de Spectroscopie Atomique Moléculaire et Applications, Université de Tunis El Manar, Tunis 1060, Tunisia
| | - Debora Scuderi
- Laboratoire
de Chimie Physique, CNRS, UMR8000, Univ. Paris-Sud, Orsay F-91405, France
| | - Vincent Steinmetz
- Laboratoire
de Chimie Physique, CNRS, UMR8000, Univ. Paris-Sud, Orsay F-91405, France
| | - Fabrice Gobert
- Laboratoire
de Chimie Physique, CNRS, UMR8000, Univ. Paris-Sud, Orsay F-91405, France
| | - Nejm-Eddine Jaïdane
- Laboratoire
de Spectroscopie Atomique Moléculaire et Applications, Université de Tunis El Manar, Tunis 1060, Tunisia
| | - Anne Zehnacker-Rentien
- Institut
des Sciences Moléculaires d’Orsay, CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France
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21
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Chiavarino B, Crestoni ME, Fornarini S, Scuderi D, Salpin JY. Undervalued N3 Coordination Revealed in the Cisplatin Complex with 2'-Deoxyadenosine-5'-monophosphate by a Combined IRMPD and Theoretical Study. Inorg Chem 2017; 56:8793-8801. [PMID: 28718635 DOI: 10.1021/acs.inorgchem.7b00570] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The complex obtained by the reaction of cisplatin and 2'-deoxyadenosine-5'-monophosphate (5'-dAMP) in water has been isolated and detected by electrospray ionization mass spectrometry. The so-formed cis-[PtCl(NH3)2(5'-dAMP)]+ complex has been studied in detail by infrared multiple photon dissociation (IRMPD) spectroscopy in two spectral ranges, namely, 700-1900 and 2800-3800 cm-1, backed by quantum-chemical calculations at the B3LYP/LACV3P/6-311G** level of theory. In agreement with the computational results, the vibrational spectroscopic characterization of cis-[PtCl(NH3)2(5'-dAMP)]+ shows that the sampled ionic population comprises two major isomers, differentiated in the X-H stretching region by their distinct fragmentation patterns. One of these species presents coordination of the platinum moiety at the N3 position of adenine, whereas in the second one, platinum is bound at the N1 position of adenine. IRMPD kinetics have allowed an estimation of their relative proportions. Surprisingly, the most abundant component of cis-[PtCl(NH3)2(5'-dAMP)]+ is the N3 isomer, although it is slightly less stable than the other potential isomers in the gas phase. In contrast, the lowest-energy species, namely, the one showing cisplatin binding to the N7 position of adenine, seems to be the one less represented in the sampled ionic population. These findings suggest that the reaction of cisplatin with 5'-dAMP is governed by the kinetics of the process occurring in solution rather than by the thermodynamic factors.
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Affiliation(s)
- Barbara Chiavarino
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza" , Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza" , Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Simonetta Fornarini
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza" , Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Debora Scuderi
- LCP, Université Paris Sud Orsay, CNRS, Université Paris-Saclay , F-91405 Orsay, France
| | - Jean-Yves Salpin
- LAMBE, Université d'Evry Val d'Essonne, CEA, CNRS, Université Paris-Saclay , F-91025 Evry, France.,LAMBE, Université Cergy-Pontoise, Université Paris-Seine , F-91025 Evry, France
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22
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Corinti D, De Petris A, Coletti C, Re N, Chiavarino B, Crestoni ME, Fornarini S. Cisplatin Primary Complex with l-Histidine Target Revealed by IR Multiple Photon Dissociation (IRMPD) Spectroscopy. Chemphyschem 2016; 18:318-325. [PMID: 27935248 DOI: 10.1002/cphc.201601172] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/07/2016] [Indexed: 11/08/2022]
Abstract
The primary complex obtained from cisplatin and l-histidine in water has been detected and isolated by electrospray ionization. The so-obtained cis-[PtCl(NH3 )2 (histidine)]+ complex has been characterized in detail by high-resolution mass spectrometry (MS), tandem MS, IR multiple photon dissociation (IRMPD) spectroscopy, and by quantum chemical calculations. The structural features revealed by IRMPD spectroscopy indicate that platinum binds to the imidazole group, which presents tautomeric forms. Thus, depending on the position of the amino acid pendant on the imidazole ring, isomeric complexes are formed that are remarkably different with respect to the ease with which they undergo fragmentation when activated either by energetic collisions or by multiple IR photon absorption. It is shown here how IRMPD kinetics can allow their relative proportions to be estimated.
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Affiliation(s)
- Davide Corinti
- Dipartimento di Chimica e Tecnologie del Farmaco, Università degli Studi di Roma La Sapienza, P.le A. Moro 5, 00185, Roma, Italy
| | - Alberto De Petris
- Dipartimento di Chimica e Tecnologie del Farmaco, Università degli Studi di Roma La Sapienza, P.le A. Moro 5, 00185, Roma, Italy
| | - Cecilia Coletti
- Dipartimento di Farmacia, Università G. D'Annunzio, Via dei Vestini 31, 66100, Chieti, Italy
| | - Nazzareno Re
- Dipartimento di Farmacia, Università G. D'Annunzio, Via dei Vestini 31, 66100, Chieti, Italy
| | - Barbara Chiavarino
- Dipartimento di Chimica e Tecnologie del Farmaco, Università degli Studi di Roma La Sapienza, P.le A. Moro 5, 00185, Roma, Italy
| | - Maria E Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Università degli Studi di Roma La Sapienza, P.le A. Moro 5, 00185, Roma, Italy
| | - Simonetta Fornarini
- Dipartimento di Chimica e Tecnologie del Farmaco, Università degli Studi di Roma La Sapienza, P.le A. Moro 5, 00185, Roma, Italy
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23
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Farrokhpour H, Karachi S, Chermahini AN. Theoretical Modeling of the Chirality Discrimination of Enantiomers by Nanotubular Cyclic Peptides using Gas-Phase Photoelectron Spectroscopy: An ONIOM Spectroscopic Calculations. J Phys Chem A 2016; 120:6780-91. [DOI: 10.1021/acs.jpca.6b07403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- H. Farrokhpour
- Department of Chemistry, Isfahan University of Technology, Isfahan, Iran, 84156-83111
| | - S. Karachi
- Department of Chemistry, Isfahan University of Technology, Isfahan, Iran, 84156-83111
| | - A. Najafi Chermahini
- Department of Chemistry, Isfahan University of Technology, Isfahan, Iran, 84156-83111
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24
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Kumar S, Lucas B, Fayeton J, Scuderi D, Alata I, Broquier M, Barbu-Debus KL, Lepère V, Zehnacker A. Photofragmentation mechanisms in protonated chiral cinchona alkaloids. Phys Chem Chem Phys 2016; 18:22668-77. [DOI: 10.1039/c6cp04041a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Photo-fragmentation of protonated alkaloids results in C8–C9 cleavage accompanied or not by hydrogen migration, with a stereochemistry-dependent branching ratio.
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Affiliation(s)
- Sunil Kumar
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- France
| | - Bruno Lucas
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- France
| | - Jacqueline Fayeton
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- France
| | - Debora Scuderi
- Univ. Paris-Sud
- Laboratoire de Chimie Physique
- UMR8000, and CNRS
- Orsay
- France
| | - Ivan Alata
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- France
| | - Michel Broquier
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- France
| | - Katia Le Barbu-Debus
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- France
| | - Valeria Lepère
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- France
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- France
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25
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Alauddin M, Gloaguen E, Brenner V, Tardivel B, Mons M, Zehnacker‐Rentien A, Declerck V, Aitken DJ. Intrinsic Folding Proclivities in Cyclic β‐Peptide Building Blocks: Configuration and Heteroatom Effects Analyzed by Conformer‐Selective Spectroscopy and Quantum Chemistry. Chemistry 2015; 21:16479-93. [DOI: 10.1002/chem.201501794] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Mohammad Alauddin
- CEA, Laboratoire Interactions Dynamique et Lasers (LIDyL), Bât. 522, 91191 Gif‐sur‐Yvette (France)
- CNRS, Laboratoire Francis Perrin URA 2453, 91191 Gif‐sur‐Yvette (France)
- Current address: Department of Chemistry, University of Dhaka, Dhaka‐1000 (Bangladesh)
| | - Eric Gloaguen
- CEA, Laboratoire Interactions Dynamique et Lasers (LIDyL), Bât. 522, 91191 Gif‐sur‐Yvette (France)
- CNRS, Laboratoire Francis Perrin URA 2453, 91191 Gif‐sur‐Yvette (France)
| | - Valérie Brenner
- CEA, Laboratoire Interactions Dynamique et Lasers (LIDyL), Bât. 522, 91191 Gif‐sur‐Yvette (France)
- CNRS, Laboratoire Francis Perrin URA 2453, 91191 Gif‐sur‐Yvette (France)
| | - Benjamin Tardivel
- CEA, Laboratoire Interactions Dynamique et Lasers (LIDyL), Bât. 522, 91191 Gif‐sur‐Yvette (France)
- CNRS, Laboratoire Francis Perrin URA 2453, 91191 Gif‐sur‐Yvette (France)
| | - Michel Mons
- CEA, Laboratoire Interactions Dynamique et Lasers (LIDyL), Bât. 522, 91191 Gif‐sur‐Yvette (France)
- CNRS, Laboratoire Francis Perrin URA 2453, 91191 Gif‐sur‐Yvette (France)
| | | | - Valérie Declerck
- CP3A Organic Synthesis Group, ICMMO, UMR 8182, Université Paris Sud, Bât. 420, 15 rue Georges Clemenceau, 91405 Orsay cedex (France)
| | - David J. Aitken
- CP3A Organic Synthesis Group, ICMMO, UMR 8182, Université Paris Sud, Bât. 420, 15 rue Georges Clemenceau, 91405 Orsay cedex (France)
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26
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Alata I, Scuderi D, Lepere V, Steinmetz V, Gobert F, Thiao-Layel L, Le Barbu-Debus K, Zehnacker-Rentien A. Exotic Protonated Species Produced by UV-Induced Photofragmentation of a Protonated Dimer: Metastable Protonated Cinchonidine. J Phys Chem A 2015; 119:10007-15. [DOI: 10.1021/acs.jpca.5b06506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ivan Alata
- Institut des Sciences
Moléculaires d’Orsay (ISMO), CNRS, Univ Paris-Sud, Université Paris Saclay, F-91405 Orsay, France
| | - Debora Scuderi
- Laboratoire de
Chimie Physique (LCP), CNRS, Univ Paris-Sud, Université Paris Saclay, F-91405 Orsay, France
| | - Valeria Lepere
- Institut des Sciences
Moléculaires d’Orsay (ISMO), CNRS, Univ Paris-Sud, Université Paris Saclay, F-91405 Orsay, France
| | - Vincent Steinmetz
- Laboratoire de
Chimie Physique (LCP), CNRS, Univ Paris-Sud, Université Paris Saclay, F-91405 Orsay, France
| | - Fabrice Gobert
- Laboratoire de
Chimie Physique (LCP), CNRS, Univ Paris-Sud, Université Paris Saclay, F-91405 Orsay, France
| | - Loïc Thiao-Layel
- Laboratoire de
Chimie Physique (LCP), CNRS, Univ Paris-Sud, Université Paris Saclay, F-91405 Orsay, France
| | - Katia Le Barbu-Debus
- Institut des Sciences
Moléculaires d’Orsay (ISMO), CNRS, Univ Paris-Sud, Université Paris Saclay, F-91405 Orsay, France
| | - Anne Zehnacker-Rentien
- Institut des Sciences
Moléculaires d’Orsay (ISMO), CNRS, Univ Paris-Sud, Université Paris Saclay, F-91405 Orsay, France
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27
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Brites V, Cimas A, Spezia R, Sieffert N, Lisy JM, Gaigeot MP. Stalking Higher Energy Conformers on the Potential Energy Surface of Charged Species. J Chem Theory Comput 2015; 11:871-83. [DOI: 10.1021/ct5008197] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vincent Brites
- LAMBE CNRS UMR8587, Université d’Evry val d’Essonne, Blvd F. Mitterrand, Bât Maupertuis, 91025 Evry, France
| | - Alvaro Cimas
- LAMBE CNRS UMR8587, Université d’Evry val d’Essonne, Blvd F. Mitterrand, Bât Maupertuis, 91025 Evry, France
| | - Riccardo Spezia
- LAMBE CNRS UMR8587, Université d’Evry val d’Essonne, Blvd F. Mitterrand, Bât Maupertuis, 91025 Evry, France
| | - Nicolas Sieffert
- Université Grenoble Alpes, DCM, 38000 Grenoble, France
- CNRS, DCM, 38000 Grenoble, France
| | - James M. Lisy
- Department
of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Marie-Pierre Gaigeot
- LAMBE CNRS UMR8587, Université d’Evry val d’Essonne, Blvd F. Mitterrand, Bât Maupertuis, 91025 Evry, France
- Institut Universitaire de France, 103 Blvd St Michel, 75005 Paris, France
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28
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Bouchet A, Klyne J, Piani G, Dopfer O, Zehnacker A. Diastereo-specific conformational properties of neutral, protonated and radical cation forms of (1R,2S)-cis- and (1R,2R)-trans-amino-indanol by gas phase spectroscopy. Phys Chem Chem Phys 2015; 17:25809-21. [DOI: 10.1039/c5cp00576k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of ionisation and protonation on the geometric and electronic structure of a prototypical aromatic amino-alcohol with two chiral centres are revealed by IR and UV spectroscopy.
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Affiliation(s)
- Aude Bouchet
- Institut für Optik und Atomare Physik
- Technische Universität Berlin
- D-10623 Berlin
- Germany
| | - Johanna Klyne
- Institut für Optik und Atomare Physik
- Technische Universität Berlin
- D-10623 Berlin
- Germany
| | - Giovanni Piani
- CNRS
- Institut des Sciences Moléculaires d’Orsay (ISMO/UMR8214) and Univ. Paris Sud
- Orsay
- France
- CLUPS (Centre Laser de l’Université Paris Sud/LUMAT FR 2764)
| | - Otto Dopfer
- Institut für Optik und Atomare Physik
- Technische Universität Berlin
- D-10623 Berlin
- Germany
| | - Anne Zehnacker
- CNRS
- Institut des Sciences Moléculaires d’Orsay (ISMO/UMR8214) and Univ. Paris Sud
- Orsay
- France
- CLUPS (Centre Laser de l’Université Paris Sud/LUMAT FR 2764)
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29
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Zehnacker A. Optical spectroscopy coupled with mass spectrometry methods. Phys Chem Chem Phys 2015; 17:25672-5. [DOI: 10.1039/c5cp90155c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This themed issue reports on recent progress in the fast developing field of spectroscopy of ions by means of mass spectrometry coupled with optical spectroscopy. It focuses on both the experimental and theoretical aspects of this topic.
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Affiliation(s)
- Anne Zehnacker
- CNRS
- Institut des Sciences Moléculaires d’Orsay (ISMO/UMR8214) and Univ. Paris Sud
- Orsay
- France
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30
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Seifert NA, Pérez C, Neill JL, Pate BH, Vallejo-López M, Lesarri A, Cocinero EJ, Castaño F. Chiral recognition and atropisomerism in the sevoflurane dimer. Phys Chem Chem Phys 2015; 17:18282-7. [DOI: 10.1039/c5cp01025j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transient chirality in the anesthetic sevoflurane results in two different homo- and heterochiral clusters on formation of the dimer, as observed by rotational spectroscopy.
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Affiliation(s)
| | - Cristóbal Pérez
- Department of Chemistry
- University of Virginia
- Charlottesville
- USA
| | - Justin L. Neill
- Department of Chemistry
- University of Virginia
- Charlottesville
- USA
| | - Brooks H. Pate
- Department of Chemistry
- University of Virginia
- Charlottesville
- USA
| | - Montserrat Vallejo-López
- Departamento de Química Física y Química Inorgánica
- Facultad de Ciencias
- Universidad de Valladolid
- 47011 Valladolid
- Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica
- Facultad de Ciencias
- Universidad de Valladolid
- 47011 Valladolid
- Spain
| | - Emilio J. Cocinero
- Departamento de Química Física
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco (UPV-EHU)
- 48080 Bilbao
- Spain
| | - Fernando Castaño
- Departamento de Química Física
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco (UPV-EHU)
- 48080 Bilbao
- Spain
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