Výsledky vyhledávání

Conformational Study of the Jet-Cooled Diketopiperazine Peptide Cyclo Tyrosyl-Prolyl

Autor: Ivan Alata, Anne Zehnacker, Valeria Lepere, Ariel Pérez-Mellor

Publikováno v: Journal of Physical Chemistry B
Journal of Physical Chemistry B, American Chemical Society, 2019, 123 (28), pp.6023-6033. ⟨10.1021/acs.jpcb.9b04529⟩

International audience; The conformational landscape of the diketopiperazine (DKP) dipeptide built on tyrosine and proline, namely, cyclo Tyr-Pro, is studied by combining resonance-enhanced multiphoton ionisation, double resonance IR-UV spectroscopy,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be03c294b17462fff411c14a9943b410
https://doi.org/10.1021/acs.jpcb.9b04529

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Structure and collision-induced dissociation of the protonated cyclo His-Phe dipeptide: mechanistic studies and stereochemical effects

Autor: Katia Le Barbu-Debus, Ariel Pérez-Mellor, Valeria Lepere, Ivan Alata, Anne Zehnacker, Riccardo Spezia

Publikováno v: The European Physical Journal D : Atomic, molecular, optical and plasma physics
The European Physical Journal D : Atomic, molecular, optical and plasma physics, EDP Sciences, 2021, 75 (6), ⟨10.1140/epjd/s10053-021-00173-w⟩

The role of stereochemical factors on the structure and the fragmentation paths of the protonated cyclic dipeptide cyclo histidine–phenylalanine is studied under ion traps conditions by combining tandem mass spectrometry, laser spectroscopy, quantu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8318d7a2f1bfb07db2b0749bf57594b8
https://doi.org/10.1140/epjd/s10053-021-00173-w

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Stereospecific collision-induced dissociation and vibrational spectroscopy of protonated cyclo (Tyr-Pro)

Autor: Valeria Lepere, Ivan Alata, Riccardo Spezia, Anne Zehnacker-Rentien, Ariel Pérez-Mellor

Publikováno v: International Journal of Mass Spectrometry
International Journal of Mass Spectrometry, Elsevier, 2021, 465, pp.116590. ⟨10.1016/j.ijms.2021.116590⟩

International audience; The protonated cyclo (LTyr-LPro) and cyclo (LTyr-DPro) dipeptides based on a diketopiperazine (DKP) ring are studied by tandem mass spectrometry in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. Collis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51b13e92dbb3dfda0d1e46f9978dbdf9
https://doi.org/10.1016/j.ijms.2021.116590

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Effects of complexation with sulfuric acid on the photodissociation of protonated Cinchona alkaloids in the gas phase

Autor: Feriel Ben Nasr, Valérie Brenner, Ivan Alata, Anne Zehnacker, Debora Scuderi, Valeria Lepere, Nejm-Eddine Jaidane

Publikováno v: Physical Chemistry Chemical Physics
Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2019, 21 (28), pp.15439-15451. ⟨10.1039/c9cp01518c⟩
Physical Chemistry Chemical Physics, 2019, 21 (28), pp.15439-15451. ⟨10.1039/c9cp01518c⟩

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 pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71f6e79f104d1ec6142538a2ec3ff97e
https://hal.archives-ouvertes.fr/hal-02347956/file/CdH+H2SO4_HAL.pdf

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Stereochemistry-dependent hydrogen bonds stabilise stacked conformations in jet-cooled cyclic dipeptides: (LD) vs. (LL) cyclo tyrosine–tyrosine

Autor: Nejm-Eddine Jaidane, Valeria Lepere, Ivan Alata, Anne Zehnacker, Feriel BenNasr, Ariel Pérez-Mellor

Publikováno v: Faraday Discussions
Faraday Discussions, Royal Society of Chemistry, 2018, 212, pp.399-419. ⟨10.1039/c8fd00079d⟩

Tyrosine-containing cyclic dipeptides based on a diketopiperazine (DKP) ring are studied under jet-cooled conditions using resonance-enhanced multi-photon ionisation (REMPI), conformer-selective IR-UV double resonance vibrational spectroscopy and qua

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99ce6ed1d0024fa6c2cb8bedf4d8d8ea
https://hal.archives-ouvertes.fr/hal-02070257

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Chirality effects in the structures of jet-cooled bichromophoric dipeptides

Autor: Ivan Alata, Anne Zehnacker, Ariel Pérez-Mellor, Valeria Lepere

Publikováno v: Journal of Molecular Spectroscopy
Journal of Molecular Spectroscopy, Elsevier, 2018, 349, pp.71-84. ⟨10.1016/j.jms.2018.02.005⟩

Diastereomer cyclic dipeptides built on a diketopiperazine (DKP) ring and phenylalanine residues of either identical or opposite chirality have been studied in jet-cooled conditions by combining conformer-specific IR-UV laser spectroscopy. Comparison

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e583bcf29231d7cb62103319d6cf2c5c
https://hal.archives-ouvertes.fr/hal-02070260

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Interstellar and interplanetary solids in the laboratory

Autor: Paul Dumas, Smail Mostefaoui, Emmanuel Dartois, Thomas Pino, Ivan Alata, Nicolas Szwec, Laurent Remusat, Rosario Brunetto, L. Delauche, Bruno Crane, Cécile Engrand, Christophe Sandt, Gilles Morinaud, Eric Quirico, Jean Duprat, Frédéric Jamme, N. Bardin

Publikováno v: Proceedings of the International Astronomical Union. 11:416-419

The composition of interstellar matter is driven by environmental parameters and results from extreme interstellar medium physico-chemical conditions. Astrochemists must rely on remote observations to monitor and analyze the interstellar solids compo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3820455ce99f5042adb86c58f6371b04
https://doi.org/10.1017/s1743921316005688

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Does the Residues Chirality Modify the Conformation of a Cyclo-Dipeptide? Vibrational Spectroscopy of Protonated Cyclo-diphenylalanine in the Gas Phase

Autor: Ivan Alata, Nejm-Eddine Jaidane, Debora Scuderi, Vincent Steinmetz, Anne Zehnacker-Rentien, Feriel Ben Nasr, Fabrice Gobert, Ariel Pérez-Mellor

Publikováno v: Journal of Physical Chemistry A
Journal of Physical Chemistry A, American Chemical Society, 2017, 121 (38), pp.7130-7138. ⟨10.1021/acs.jpca.7b06159⟩

The structure of a protonated diketopiperazine dipeptide, cyclo-diphenylalanine, is studied by means of infrared multiple photon dissociation spectroscopy combined with quantum chemical calculations. Protonation exclusively occurs on the oxygen site

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72ee20e4088703c2f2e67554124a6e42
https://pubmed.ncbi.nlm.nih.gov/28873305

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Polyaromatic disordered carbon grains as carriers of the UV bump: FUV to mid-infrared spectroscopy of laboratory analogs

Autor: Emmanuel Dartois, Thomas Pino, Ivan Alata, Alexandre Giuliani, Kim Cuong Le, Lisseth Gavilan

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 607, A73 (19 p.). ⟨10.1051/0004-6361/201730712⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 607, pp.A73. ⟨10.1051/0004-6361/201730712⟩
Astronomy and Astrophysics-A&A, 2017, 607, pp.A73. ⟨10.1051/0004-6361/201730712⟩

A multiwavelength study of laboratory carbons with varying degrees of hydrogenation and sp$^2$ hybridization is required to characterize the structure of the carbonaceous carriers of interstellar and circumstellar extinction. Analogs to carbonaceous

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a7dcf7e0c80ce5a580805bbcc135ad5
https://hal-insu.archives-ouvertes.fr/insu-01626063

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