Description du sujet de thèse

Persistent luminescence involves managing the triplet states of an organic molecule by allowing these states to emit light directly, or by enabling a phenomenon known as intersystem back-passing. These phenomena are very much in vogue, making it possible to use dyes with these properties in applications ranging from photocatalysis and most interestingly, insertion in light-emitting diode-type devices (OLEDs).[1]
For several years, we have been interested in the synthesis and characterization of molecules displaying thermally activated delayed fluorescence properties. We have been able to show that molecules such as the boron difluorides of curcuminoids display this property, enabling them to emit efficiently in the near infrared. 2-4] The synthesis of this type of dyes is now well mastered, and new derivatives are being synthesized by the team.
This project is part of an ANR program (TRIPLAY). In this project, we are combining our expertise in the synthesis and characterization of persistent luminescence dyes with that of the synthesis and characterization of lamellar hybrid materials. 5-7] A theoretical approach will also be used to rationalize the results obtained.
The doctoral project will therefore involve the development of new persistent luminescence molecules containing groups capable of attaching to lamellar hybrid materials. The synthesis will be carried out in the Department of Organic Materials under the supervision of Dr Anthony D'Aléo, while the photophysical characterizations will also be carried out at ICPMS under the co-supervision of Dr Loïc Mager in the Department of Ultrafast Optics and Nanophotonics. The selected PhD candidate will collaborate closely with another PhD student from the Chemistry of Inorganic Materials Department at IPCMS and a theoretician from ENS Lyon.
The PhD candidate (M/F) should have a good knowledge of the chemistry and characterization of organic molecules. Interest and experience in photophysics will be appreciated.
[1] J. M. Dos Santos, D. Hall, B. Basumatary, M. Bryden, D. Chen, P. Choudhary, T. Comerford, E. Crovini, A. Danos, J. De, S. Diesing, M. Fatahi, M. Griffin, A. K. Gupta, H. Hafeez, L. Hämmerling, E. Hanover, J. Haug, T. Heil, D. Karthik, S. Kumar, O. Lee, H. Li, F. Lucas, C. F. R. Mackenzie, A. Mariko, T. Matulaitis, F. Millward, Y. Olivier, Q. Qi, I. D. W. Samuel, N. Sharma, C. Si, L. Spierling, P. Sudhakar, D. Sun, E. Tankelevičiu̅tė, M. D. Tonet, J. Wang, T. Wang, S. Wu, Y. Xu, L. Zhang, E. Zysman-Colman Chemical Reviews 2024 124 (24), 13736-14110. The Golden Age of Thermally Activated Delayed Fluorescence Materials: Design and Exploitation
[2] D.-H. Kim, A. D'Aléo, X.-K. Chen, A. D. S. Sandanayaka, D. Yao, L. Zhao, T. Komino, E. Zaborova, G. Canard, Y. Tsuchiya, E. Choi, J. W. Wu, F. Fages, J.-L. Brédas, J.-C. Ribierre, C. Adachi, Nat. Photon. 2018, 12, 98. High-efficiency electroluminescence and amplified spontaneous emission from a thermally activated delayed fluorescent near-infrared emitter
[3] H. Ye, D. H. Kim, X. Chen, A. S. D. Sandanayaka, J. U. Kim, E. Zaborova, G. Canard, Y. Tsuchiya, E. Y. Choi, J. W. Wu, F. Fages, J.-L. Bredas, A. D'Aléo, J.-C. Ribierre, C. Adachi Chem. Mater. 2018, 30 (19), 6702-6710. Near-Infrared Electroluminescence and Low Threshold Amplified Spontaneous Emission above 800 nm from a Thermally Activated Delayed Fluorescent Emitter
[4] A. D'Aléo, X. Tang, D.-H. Kim, D. Valverde, E. Zaborova, G. Canard, A. Brosseau, L. Mager, G. Clavier, C. Adachi, Y. Olivier, J.-C. Ribierre, Emission. Adv. Optical Mater. 2025, 2500338. Curcuminoid Derivatives with a Donor-Acceptor-Donor Architecture: an Outstanding Platform for Highly-Efficient Near-Infrared Electroluminescence and Amplified Spontaneous.
[5] G. Rogez, C. Massobrio, P. Rabu, M. Drillon, Chem. Soc. Rev. 2011, 40, 1031. Layered hydroxide hybrid nanostructures: a route to multifunctionality.
[6] R. Bourzami, S. Eyele-Mezui, E. Delahaye, M. Drillon, P. Rabu, N. Parizel, S. Choua, P. Turek, G. Rogez, Inorg. Chem. 2014, 53, 1184. New Metal Phthalocyanines/Metal Simple Hydroxide Multilayers: Experimental Evidence of Dipolar Field-Driven Magnetic Behavior
[7] Y. Wang, E. Delahaye, C. Leuvrey, F. Leroux, P. Rabu, G. Rogez, Inorg. Chem. 2016, 55, 4039. Efficient Microwave-Assisted Functionalization of the Aurivillius-Phase Bi2SrTa2O9.

Contexte de travail

The Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS-UMR7504) is a joint research unit of the CNRS (CNRS-Physics & CNRS-Chemistry) and the University of Strasbourg. Created in 1987, it is the result of the synergy of 5 research teams in condensed matter physics and chemistry. The multidisciplinary nature of the IPCMS is reflected in its activities in spin electronics, magnetism, ultra-fast optics, electron microscopy and local probes, biomaterials, and the synthesis and characterization of organic, inorganic and hybrid functional materials. The institute boasts a wide range of instruments for the fabrication and characterization of materials on all scales. Today, the IPCMS employs a staff of 240, including around 80 researchers and teacher-researchers and 60 technical support staff.

The IPCMS is easily accessible from Strasbourg city center, in about 15 minutes by public transport. The campus has its own catering service.
The PhD student (M/F) will be attached to the Ecole Doctorale de Physique et Chimie Physique (ED182). His/her thesis work will be carried out at IPCMS, in the Organic Materials Department, in the Photophysics and Photonics for Organic Electronics team, and will be supervised by A. D'Aléo (CNRS Research Director).
The position is located in an area covered by the protection of scientific and technical potential (PPST), and therefore requires, in accordance with regulations, that your arrival be authorized by the competent MESR authority.

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.

Contraintes et risques

Laboratory work in compliance with health and safety regulations, using appropriate personal protective equipment.