Enantioselective preferential physisorption, chemisorption, and dimerization at spin-polarized interfaces:

• Réf

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ABG-111715

• Sujet de Thèse 04/03/2023
• Financement de l'Union européenne
• Yves Geerts
• Lieu de travail
• Bruxelles
• Belgique
• Intitulé du sujet
• Enantioselective preferential physisorption, chemisorption, and dimerization at spinpolarized interfaces
• Champs scientifiques
  
• Chimie

Matériaux Physique

Mots clés

• Chirality, spin, enantiomeric excess, organic synthesis, materials
  Description du sujet:

CISSE is a multi-site Doctoral Network supported by the European Commission through the Marie Sklodowska Curie program, aimed at enabling finest quality research training and transfer of knowledge in an interdisciplinary, inter-sectoral, and revolutionary research field.

The CISSE consortium members carry out research at the forefront of a number of interlinked theoretical and experimental disciplines involving:

molecular design, synthetic chemistry, organic materials, nanoscience, electrochemistry, chirality, surface chemistry, industrial scale up, development of analytical methods and instrumentation.

CISSE offers a training program in which theoreticians, spectroscopists, synthetic chemists, physicists, & industrialists will work on the complex and unsolved questions related to chirality and spin.

CISSE gathers an interdisciplinary network of experts, from 6 universities and 2 industrial organizations, who will deliver a high-level doctoral education to 10 DCs.

6 associated partners (4 academics, 1 non-profit cultural organization and 1 private company) will complete their scientific and managerial training.

CISSE will educate DCs as professional scientists, but also as innovators and future leaders.

The intensive training program that takes advantage of two secondments offers DCs the unique opportunity to carry research at the forefront of science.

Objective of the PhD thesis:

To demonstrate that spin-polarization can lead to specific enantiomeric excess

Expected results:

It has been demonstrated that enantiomers adsorb differently on spin-polarized metallic surfaces and that spin controls the fate of reduced or oxidized species on spin-polarized electrodes.

However, few examples are known and no molecular design rules exist. Moreover, the evidences of enantiomeric excess are rather indirect. DC2 will design and synthesize various molecular systems tailored to either adsorb or react on spin-polarized interface. Enantiomeric excess will be assessed locally by STM for systems with preferential physisorption and chemisorption. Adsorption kinetics will be explored with quartz microbalance. Enantioselective oxidative coupling of prochiral monomers to chiral dimers will be performed on spin-polarized electrodes. Conglomerate-forming atropisomers and conformers with various racemization barrier will be used to study their nucleation on various spin-polarized substrates. Enantiomeric excess will be correlated with molecular systems, crystallization conditions, and spin-polarization. Interactions between enantiomers and spin-polarized surfaces will be studied by contact angle measurements. Reaction products will be analyzed by NMR and MS. Enantiomeric excess will be measured by chiral HPLC. Experiments will be repeated to ensure reproducibility.

Prise de fonction:

• 01/09/2023
  Nature du financement:
• Financement de l'Union européenne

Précisions sur le financement:

• MSCA doctoral fellowships
  Présentation établissement et labo d'accueil:
• Yves Geerts

Université Libre de Bruxelles

• Free University of Brussels (ULB) is a major academic institution with international recognition for scientific achievements

The group of
Site web:

Intitulé du doctorat:

• PhD in Chemistry
  Pays d'obtention du doctorat:
• Belgique

Etablissement délivrant le doctorat:

• Université Libre de Bruxelles
  Ecole doctorale:

Chimie

• 15/04/2023

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