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Chiral magnetic nanocomposites for the induction of magnetochiral dichroism


In this project, we will design and synthesize magnetic nanocomposites, consisting of coordination complexes grafted onto silica nanohelices, with the aim of studying their magnetochiral dichroism (MChD) response. MChD is a rarely-observed spectroscopic phenomenon arising from the interplay between magnetism and chirality.1 In the nanocomposites, the magnetism component will be supplied by the magnetic chromophores, and the chirality will be supplied by the nanohelices. We have shown that the helices induce a chiral response (circular dichroism) in grafted non-chiral molecules (see fig. and ref. 2). The thesis will focus on the fabrication of the nanocomposites (coordination chemistry, sol-gel and colloid chemistry), with additional work in collaboration with physicists specialized in MChD measurements.

Grafting of Fe-EDTA on a right-handed silica helix. Transmission electron microscopy (TEM) images of bare (A) and grafted (B) silica helix. C : Schematic of grafted helix. D : Circular dichroism and UV-vis spectra of the Fe-EDTA grafted helix.

1) Y. Mulyana, K. Ishii, Dalton Trans., 2014, 43, 17596 ; G. L. J. A. Rikken, E. Raupach, Nature, 1997, 390, 493. 2) M. Attoui, E. Pouget, R. Oda, D. Talaga, G. Le Bourdon, T. Buffeteau, S. Nlate, Chem. Eur. J., 2018, 24, 11344 ; N. Ryu, Y. Okazaki, K. Hirai, M. Takafuji, S. Nagaoka, E. Pouget, H. Ihara, R. Oda, Chem. Commun., 2016, 52, 5800.

Student profile  : Master in molecular chemistry or nanochemistry, experience in molecular or materials synthesis, interest in working on an interdisciplinary topic

- Elizabeth HILLARD
Centre de Recherche Paul Pascal (CRPP) UMR 5031
115 Av Schweitzer, 33600 Pessac, FRANCE ;
E-mail : Elizabeth HILLARD ; Tél : 05 56 84 56 24

- Emilie POUGET
Institut de Chimie et Biologie des Membranes et des Nano-objets (CBMN)
Allée St. Hilaire, 33600 Pessac, FRANCE ;
E-mail : Emilie POUGET ; Tél : 05 40 00 63 76