CE08 - Matériaux métalliques et inorganiques et procédés associés

Metal Organic Thiolate Coordination Polymers as Innovative Thermoelectric Materials – MOTIC

Submission summary

The chemistry of coordination polymers (CPs) opens up great perspectives for the development of new materials such as in the field of electronics and in energy-harvesting for the recycling of waste heat by thermoelectric effects. These materials consist of an organic matrix crossed by electrical conduction channels made up of metal centers connected to the coordinating functions. The geometry, the denticity, the oxidation state of the ligands, the addition of external groups, the size and complexity of the organic function, the activation and the nature of the metallic center allow a wide variability in the topology of the CPs, conductive channels while including the possibility of organized nanoporosity. The project is centered on one of the major families of thiolate-based CPs where the best values of electrical conduction for CPs have recently been discovered. Building on its expertise and recent results in this family of materials, the consortium proposes to develop a new class of Metal Organic Thiolates (MOT) CPs by optimizing two physical functionalities: thermoelectric conversion and electrical conductivity coupled with optical transparency. Three main guidelines are proposed for the design and implementation of new MOT architectures: i / vary the dimensionality of the conduction channels (1D, 2D to 3D); ii / modify the topology of the organic matrix and iii / control charge carrier doping. The MOTIC consortium is made up of experts in the chemistry of thiolated ligands, the elaboration and activation of CPs, resolution of crystallographic structures of CPs, and optical and thermoelectric measurements. Preliminary experiments on a new composition of MOTs have made it possible to resolve their complex crystallographic structure, to show thermal stability up to 350 °C, to show the ease of forming either in dense pellet or in thin layers, to reveal transparency properties for disordered phases and a first electronic conduction. The development of electronics for CPs is recent and raises many fundamental questions that still remain unanswered. The MOTIC project aims to provide answers on the understanding of the physical microscopic mechanisms of electronic and thermal transport as well as on the thermoelectric effects in these materials. The iterative exchanges between chemists and physicists will make it possible to best guide the optimization of the architecture of materials, this is one of the strengths of the project. Finally, the MOTIC project consolidates French expertise in the chemistry of CPs, will help strengthen the thermoelectric community in its component of materials and transport physics in organic conductors and will catalyze larger-scale projects. In terms of training, the MOTIC project gives priority to young scientists with two thesis funding, 11 Masters 2 internships and a request for co-funding for a workshop.
To conclude, MOTIC is a fundamental low TRL project bringing together chemists and physicists whose objective is to explore iteratively, by associating a fundamental understanding, the potential of CPs for thermoelectric conversion and transparent electronics. The aim is to reach general conclusions that will open up new application perspectives for these materials.

Project coordination

Aude DEMESSENCE (INSTITUT DE RECHERCHES SUR LA CATALYSE ET L'ENVIRONNEMENT DE LYON)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

ICBMS INSTITUT DE CHIMIE ET BIOCHIMIE MOLECULAIRES ET SUPRAMOLECULAIRES
ILV Institut Lavoisier de Versailles
IRCELYON INSTITUT DE RECHERCHES SUR LA CATALYSE ET L'ENVIRONNEMENT DE LYON
ILM INSTITUT LUMIERE MATIERE

Help of the ANR 506,440 euros
Beginning and duration of the scientific project: January 2022 - 48 Months

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