Stage type: * --Please choose a type-- L3 M1 M2 PhD PostDoc

The main goal of this project is to provide systematic comparative studies to rationalize the occurrence and magnitude of the CISS effect in molecular nanodevices. In order to reach those objectives, we will synthesize series of coordination compounds designed to present a range of stable chiroptical activities, that will be deposited as thin films or grafted as monolayers on metallic substrates while preserving both their structure and their enantiopurity. We will then thoroughly study the chiroptical properties of these thin films by a range of surface sensitive spectroscopies. Ultimately, the CISS effect induced by these chiral surfaces will be studied (partly in house, partly with the help of external collaborators) by integrating them into vertical charge transport devices to probe their spin dependent properties and analyze their CISS activity.

Stage type: * --Please choose a type-- L3 M1 M2 PhD PostDoc

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.

Stage type: * --Please choose a type-- L3 M1 M2 PhD PostDoc

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

Stage type: * --Please choose a type-- L3 M1 M2 PhD PostDoc

Chiral Induction from Microns to Electrons using carbon nanomaterials Laboratories : CBMN and ISM, CNRS/University of Bordeaux Supervisors: Reiko Oda and Dario Bassani We aim to create chiral carbon nanomaterials (CNM) (nano-helices) with controlled helicities and pitches. They are extremely attractive objects because they are chemically and thermally stable, exhibiting high photostability and intense photoluminescence. The goal of this project is to induce a controllable spectral circular polarization and to observe the non-linear chiroptic properties of these CNMs. Their morphologies make it possible to probe the effect of symmetry breaking at the sub-micrometric scale, currently unattainable by the molecular approach or the "top-down" approach. The candidate needs to have a Master degree (or equivalence) in organic/physical chemistry and have experiences in organic/colloid/photo chemistry and self-assembly. Please send a motivation letter, Curriculum Vitae and 2 recommendation letters to: Reiko Oda (reiko.oda@u-bordeaux.fr) and Dario Bassani (dario.bassani@u-bordeaux.fr)