Author Archives: valerie
deadline for JACC abstract submission
procedure described on
https://jacc2022.sciencesconf.org/resource/page/id/8
JACC-4to7 oct. 2022
Journées André Collet de la Chiralité
https://jacc2022.sciencesconf.org/
October 4-7 (2022) in a wonderfull place in Biarritz
deadline for abstract submission : June 15th 2022
early bird registration starting : July 1rst 2022
With as Plenary and Keynote speakers :
- Melanie Schnell
- Tiziana Benincori
- Marie-Claire Schanne Klein
- Hiroshi Yamamoto
- Eric Meggers
- Etienne Brasselet
- Mathieu Raynal
- Benjamin Abécassis
- Jess Wade
- Félix Freire
INSCRIPTION TO JACC 2022
2022-06-02
News:
Journées André Collet de la Chiralité
With as Plenary and Keynote speakers :
- October 4-7 (2022) in a wonderfull place in Biarritz
- deadline for oral abstract submission :
June 15thJuly 15-2022 - deadline for poster abstract submission : August 31, 2022
- early bird registration starting :
July 1rstJuly 24, 2022
With as Plenary and Keynote speakers :
- Melanie Schnell
- Tiziana Benincori
- Marie-Claire Schanne Klein
- Hiroshi Yamamoto
- Eric Meggers
- Etienne Brasselet
- Mathieu Raynal
- Benjamin Abécassis
- Jess Wade
- Félix Freire
Laboratory :
ICMCB
Kick-off meeting of ANR-CHIMERA
Elaboration d’hélices oligomériques fonctionnelles comme nouveaux outils pour sonder la chiralité moléculaire et supramoléculaire de surfaces et interfaces chirales
Starting date :
2022-09-01
Duration/month :
36
Preferred Majors for applicants :
Organic Chemistry
Ce sujet de thèse s’inscrit dans le cadre du projet ANR NLOChiraMat (2021-
2025) qui regroupe deux laboratoires de l’Université de Bordeaux et un laboratoire de l’Université de
Namur en Belgique.
Probing Chirality with X-rays: Molecular materials for XNCD and RIXS-NCD spectroscopies
Supervisor :
Elizabeth HILLARD
Laboratory/campus :
ICMCB Pessac
Starting date :
2022-09-01
Duration/month :
36
Preferred Majors for applicants :
chemistry, materials
Thesis objectives: Synthesis and crystallization of chiral coordination compounds for the study of X-ray Natural Circular Dichroism and Resonant Inelastic X-ray Scattering Natural Circular Dichroism
Abstract: In the XIMTEX ANR project, we will develop tools to simulate XNCD (X-ray Natural Circular Dichroism) and RIXS-NCD (Resonant Inelastic X-ray Scattering Natural Circular Dichroism) spectra based on original experimental datasets collected on crystal-state chiral coordination complexes. The proposed systems have been designed to answer fundamental questions regarding the influence of electronic structure and local symmetry on the shape and intensity of XNCD and RIXS-NCD spectra. XIMTEX assembles chemists and physicists from the ICMCB UMR 5026 and the IMPMC UMR 7590, as well as from the SOLEIL and ESRF synchrotrons, with the aim of unlocking the potential of XNCD and RIXS-NCD spectroscopy for materials characterization. This will be done by the selection and fabrication of model compounds, the collection of benchmark XNCD data, the use of these data to identify the important parameters in the simulation of the spectra, leading to software that can be used by the broader scientific community working in X-ray optical activity. The focus of this thesis will be the preparation and crystallographic characterization of chiral coordination complexes in the solid state. The student will learn techniques in coordination chemistry synthesis and characterization, including synthesis under inert atmosphere. Mastery of X-ray diffraction and structure solution and refinement will be obtained during the thesis. The student will furthermore participate in experimental sessions at SOLEIL and the ESRF synchrotron for data collection and treatment.
Important references: [1] J. Goulon, A. Rogalev, C. Brouder, in Comprehensive Chiroptical Spectroscopy, John Wiley & Sons, Ltd 2011.
[2] J. Goulon, A. Rogalev, F. Wilhelm, C. Goulon-Ginet, P. Carra, I. Marri, Ch. Brouder, J. Exp. Theor. Phys. 2003, 97 (2), 402–431. DOI: 10.1134/1.1609001.
[3] C. R. Natoli, C. Brouder, P. Sainctavit, J. Goulon, C. Goulon-Ginet, A. Rogalev, Eur. Phys. J. B. 1998, 4 (1), 1–11. DOI: 10.1007/s100510050344.
Activities: Synthesis of compounds, some of them under inert atmosphere (glove box, Schlenk techniques), solution-based crystal growth, structural characterization by single crystal X-ray diffraction, routine characterization (IR, elemental analysis, UV-vis spectroscopy), advanced optical characterization by X-ray absorption and RIXS.
Required skills: Knowledge and/or experience in coordination chemistry, coursework in X-ray diffraction, fluency in French and/or English, good organization skills, and a respect for lab safety and teamwork.
Place: ICMCB – UMR5026, 87, Avenue du Docteur Schweitzer, 33600 PESSAC (France)
ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux - CNRS UMR 5026
Dates: Start date between September and October 2022. Funding for 36 months.
Application requirements on :
https://emploi.cnrs.fr/Offres/Doctorant/UMR5026-FREBON0-105/Default.aspx
and if any issue you can contact elizabeth.hillard[at]icmcb.cnrs.fr
Abstract: In the XIMTEX ANR project, we will develop tools to simulate XNCD (X-ray Natural Circular Dichroism) and RIXS-NCD (Resonant Inelastic X-ray Scattering Natural Circular Dichroism) spectra based on original experimental datasets collected on crystal-state chiral coordination complexes. The proposed systems have been designed to answer fundamental questions regarding the influence of electronic structure and local symmetry on the shape and intensity of XNCD and RIXS-NCD spectra. XIMTEX assembles chemists and physicists from the ICMCB UMR 5026 and the IMPMC UMR 7590, as well as from the SOLEIL and ESRF synchrotrons, with the aim of unlocking the potential of XNCD and RIXS-NCD spectroscopy for materials characterization. This will be done by the selection and fabrication of model compounds, the collection of benchmark XNCD data, the use of these data to identify the important parameters in the simulation of the spectra, leading to software that can be used by the broader scientific community working in X-ray optical activity. The focus of this thesis will be the preparation and crystallographic characterization of chiral coordination complexes in the solid state. The student will learn techniques in coordination chemistry synthesis and characterization, including synthesis under inert atmosphere. Mastery of X-ray diffraction and structure solution and refinement will be obtained during the thesis. The student will furthermore participate in experimental sessions at SOLEIL and the ESRF synchrotron for data collection and treatment.
Important references: [1] J. Goulon, A. Rogalev, C. Brouder, in Comprehensive Chiroptical Spectroscopy, John Wiley & Sons, Ltd 2011.
[2] J. Goulon, A. Rogalev, F. Wilhelm, C. Goulon-Ginet, P. Carra, I. Marri, Ch. Brouder, J. Exp. Theor. Phys. 2003, 97 (2), 402–431. DOI: 10.1134/1.1609001.
[3] C. R. Natoli, C. Brouder, P. Sainctavit, J. Goulon, C. Goulon-Ginet, A. Rogalev, Eur. Phys. J. B. 1998, 4 (1), 1–11. DOI: 10.1007/s100510050344.
Activities: Synthesis of compounds, some of them under inert atmosphere (glove box, Schlenk techniques), solution-based crystal growth, structural characterization by single crystal X-ray diffraction, routine characterization (IR, elemental analysis, UV-vis spectroscopy), advanced optical characterization by X-ray absorption and RIXS.
Required skills: Knowledge and/or experience in coordination chemistry, coursework in X-ray diffraction, fluency in French and/or English, good organization skills, and a respect for lab safety and teamwork.
Place: ICMCB – UMR5026, 87, Avenue du Docteur Schweitzer, 33600 PESSAC (France)
ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux - CNRS UMR 5026
Dates: Start date between September and October 2022. Funding for 36 months.
Application requirements on :
https://emploi.cnrs.fr/Offres/Doctorant/UMR5026-FREBON0-105/Default.aspx
and if any issue you can contact elizabeth.hillard[at]icmcb.cnrs.fr
Upcoming virtual event for Chirality.
2022-02-17
News:
the First Virtual Symposium on Chirality hosted by our very own Associate Editor, Prof. Oliver Trapp. The virtual symposium will take place on Tuesday, 22 February 2022 from 12:00 PM UTC to 2:30 PM UTC
Register now to attend for free!
We welcome three Chirality authors:
- Prof. Tamaki Nakano (Institute for Catalysis (ICAT), Hokkaido University, Japan) Light-induced Conformational Transition of Polymers and Small Molecules
Based on his work: Photo racemization of 2,2′-dihydroxy-1,1′-binaphthyl derivatives --- Chirality, 2021. https://doi.org/10.1002/chir.23400
- Prof. Dr. Alexander Kuhn (Groupe Nanosystèmes Analytiques, Université de Bordeaux, France) Unconventional Electrochemical Approaches for the Direct Readout of Chiral Information
Based on his work: Hybrid light-emitting devices for the straightforward readout of chiral information--Chirality, 2021. https://doi.org/10.1002/chir.23370
- Dr. Peter Wipf (Department of Chemistry, University of Pittsburgh, USA) Enantioselective Imine Additions in the Preparation of Bioactive Lead Compounds Based on his work: Enantioselective synthesis and selective functionalization of 4-aminotetrahydroquinolines as novel glp-1 secretagogues --Chirality, 2021. https://doi.org/10.1002/chir.23403
Laboratory :
Chirality journal
PhotoElectron ELiptical Dichroism : PEELD
2022-02-09
News:
The resonance-enhanced multiphoton ionization of chiral molecules by elliptically polarized laser pulses produces photoelectron angular distributions that are forward/backward asymmetric with respect to the light propagation axis. We investigate this photoelectron elliptical dichroism in the (2 + 1)-photon ionization of fenchone molecules, using wavelength tunable femtosecond UV pulses. We show that the photoelectron elliptical asymmetry is extremely sensitive to the intermediate resonant states involved in the ionization process, and enables electronic couplings to be revealed that do not show up so clearly when using circularly polarized light.
https://hal-cnrs.archives-ouvertes.fr/hal-03547281
https://hal-cnrs.archives-ouvertes.fr/hal-03547281
Laboratory :
CELIA
Revealing the Influence of Molecular Chirality on Tunnel-Ionization Dynamics
2021-12-21
News:
The tunneling of a particle through a barrier is one of the most fascinating quantum phenomena. The motion taking place under the barrier, in a region forbidden by classical mechanics, is the subject of intense debate. Many experiments aim at measuring the time taken by the particle to go through the tunnel. Here, we take a completely different direction, revealing the influence of the dynamics under the barrier on the motion of the outgoing particle. Our approach combines two key elements: the barrier is chiral—its structure cannot be superimposed on its mirror image—and it rotates in time. Specifically, our barrier holds the electrons inside a chiral molecule, set spinning by a photoionizing laser field whose polarization rotates. The electrons must pass through the spinning barrier of the molecule to escape.
Laboratory :
CELIA