Luminescent mechanoresponsive nanocomposite

14 May 2024
Job Information

Organisation/Company

Institut des Sciences Chimiques de Rennes - Chimie du Solide et Matériaux - Université de Rennes 1

Research Field

Chemistry
Technology » Materials technology

Researcher Profile

Recognised Researcher (R2)
Leading Researcher (R4)
First Stage Researcher (R1)
Established Researcher (R3)

Country

France

Application Deadline

30 Jul 2024 - 22:00 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Offer Starting Date

1 Oct 2024

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

The direct translation of a mechanical force into an easily readable luminescence signal opens up new perspectives in the field of materials and mechanical stress detection. To date, these functional materials are mainly based on the integration of emissive organic mechanophores. However, these compounds are limited by their photobleaching problems, lack of sensitivity and synthesis costs.

The aim of this PhD is to explore a new detection concept by developing low cost, mechanoresponsive luminescent (MRL) copolymers incorporating two complementary emitters: 3-oxindole derivatives and octahedral molybdenum clusters (Mo6 ), and study their emission behavior under mechanical stress. Mo6 are red phosphorescent with high quantum yields, have excellent photostability and are very sensitive to O2 . Derivatives of 3-oxindoles are blue-green luminescent and can be easily functionalized to copolymerize and interact with Mo6

This project brings together 2 fundamental concepts in a single material: i) the quenching of phosphorescence by O2 , which destroys the O2 molecules by producing singlet oxygen, ii) the variation of O2 permeability under mechanical stress of semi-crystalline polymers. As described in Figure 2, such changes should modify the emission color of the nanocomposite containing the two emitters, thus allowing the direct visualization of a mechanical stress.

 

This pluridisciplinary project is organized in several phases combining molecular and macromolecular synthesis, pure and in-operando photophysical studies (coupled with mechanical sensing). The person recruited will benefit from a threefold training in synthesis and characterization of hybrid polymers in the OMC (M. Achard) and CSM (M. Amela-Cortes, Y. Molard) teams at ISCR, in photophysical measurements (Caphter UAR ScanMAT platform) and in the characterization of mechanical behavior with and without UV-2A irradiation (IPR, QI2M team).

 

Related publications:

S. Khlifi, J. Bigeon, M. Amela-Cortes, N. Dumait, H. Akdas-Kiliç, G. Taupier, S. Freslon, S. Cordier, S. Derien, M. Achard, G. h. Loas, Y. Molard, J. Mater. Chem. C 2021, 9, 7094-70102, 10.1039/D1TC01229K

Khlifi, S.; Fournier Le Ray, N.; Paofai, S.; Amela-Cortes, M.; Akdas-Kilic, H.; Taupier, G.; Derien, S.; Cordier, S.; Achard, M.; Molard, Y., Self-erasable inkless imprinting using a dual emitting hybrid organic-inorganic material. Mater. Today 2020, 35, 34-41.

Robin, M.; Dumait, N.; Amela-Cortes, M.; Roiland, C.; Harnois, M.; Jacques, E.; Folliot, H.; Molard, Y., Direct Integration of Red-NIR Emissive Ceramic-like AnM6Xi8Xa6 Metal Cluster Salts in Organic Copolymers Using Supramolecular Interactions. Chem. Eur. J. 2018, 24 (19), 4825-4829.

Amela-Cortes, M.; Paofai, S.; Cordier, S.; Folliot, H.; Molard, Y., Tuned Red NIR phosphorescence of polyurethane hybrid composites embedding metallic nanoclusters for oxygen sensing. Chem. Commun. 2015, 51, 8177-8180.

Funding category: Contrat doctoral
ANR
PHD title: Luminescent mechanoresponsive nanocomposite
PHD Country: France

Requirements
Specific Requirements

This PhD project is part of the ANR "Everyone" research project (2024-2028). The successful candidate will have a profile as a molecular chemist with recognized skills in organic synthesis and ideally skills in optical spectroscopy (absorption, emission). Due to the interdisciplinary nature of the project, the ideal candidate will show a high degree of initiative and willingness to advance the topic in its entirety: from organic synthesis to mechanical testing. He/she must be able to work in a team in an international environment (fluency in English is mandatory).

Additional Information
Work Location(s)

Number of offers available

1

Company/Institute

Institut des Sciences Chimiques de Rennes - Chimie du Solide et Matériaux - Université de Rennes 1

Country

France

Geofield

Where to apply

Website

https://www.abg.asso.fr/fr/candidatOffres/show/id_offre/123797

Contact

Website

http://https://iscr.univ-rennes.fr/solid-state-chemistry-and-materials-csm

STATUS: EXPIRED