A. Corral-Zorzano

E. Lalinde

M . T. Moreno

M. Martínez-Junquera

English

Repositorio de Universidad de La Rioja

          French, Swiss and German Conference on Photochemistry, Photophysics and Photosciences  CP2P’23  15, 16, 17 May 2023  Mulhouse, France        SP2P French, Swiss and German Conference on Photochemistry, Photophysics and Photosciences CP2P’23  PHOSPHORESCENT CYCLOMETALATED Ir(III) COMPLEXES WITH ACETYLIDE AND ISOCYANIDE LIGANDS   E. Lalinde, A. Corral-Zorzano, M. Martínez-Junquera, M. T. Moreno  Departamento de Química-Centro de Investigación en Síntesis Química (CISQ), Universidad de La Rioja, 26006, Logroño, Spain  Email: elalinde@unirioja.es     Over the last years, numerous studies have been carried out on d6 phosphors, such as RuII or IrIII and d8 PtII compounds, due to their potential application in different optoelectronic fields. In particular, cyclometalated Ir(III) complexes display very high photophysical performances due their good photostability, high photoluminescent quantum yields (ΦPL), facile color tunability and long-lived triplet excited states. Furthermore, this class of complexes has been applied to a variety of photonic applications including oxygen sensing, biological labeling, photosensitization, and emissive materials in organic light emitting diodes (OLEDs)1. These complexes usually display mixed metal-to-ligand charge transfer/ligand centered (3MLCT/3LC) excited states with some ligand-to-ligand charge transfer (3LLCT) character depending on the auxiliary ligands. Strong field ligand coordination is desirable because it rises the energy of the nonradiative dd metal centered excited states causing enhancement of the quantum yields.  Following the interest of the group in designing photoluminescent cyclometalated systems based on strong field ligands such as CN-, isocyanide or acetylide,2, 3 here we present the synthesis and optical properties of a new family of neutral cyclometalated iridium(III) heteroleptic complexes [Ir(C^N)2(CNXyl)(C{CR)] (C^N = difluorophenylpyridinate (dffpy) 1, 2-phenylbenzothiazolate (pbt) 2, 2-phenylquinolate (pq) 3; R= p-tolyl a, C6H2(OMe)3 b, pyrene c). These complexes are luminescent in different media, originating from 3MLCT/3LLCT/3LC states, as supported by TD-DFT studies.  Figure 1: Synthesized cyclometalated Ir(III) complexes with different acetylide ligands.  Acknowledgements: We thank the Spanish Ministry of Science and Innovation (Project: PID2019-109742GB-I00) for financial support. M. M-J is grateful to UR for a PhD grant.  References 1. T.-Y. Li, J. Wu, Z.-G. Wu, Y.-X. Zheng, J.-L. Zuo and Y. Pan, Coord. Chem. Rev., 2018, 374, 55-92. 2. J. Fernández-Cestau, N. Giménez, E. Lalinde, P. Montaño, M. T. Moreno, S. Sánchez. Organometallics,   2015, 34, 1766-1778. 3. M. Martínez-Junquera, R. Lara, E. Lalinde, M. T.  Moreno. J. Mater. Chem. C, 2020, 8, 7221-7233 

PHOSPHORESCENT CYCLOMETALATED Ir(III) COMPLEXES WITH ACETYLIDE AND ISOCYANIDE LIGANDS

https://investigacion.unirioja.es/documentos/649a9b2ecc8ad211a959277e/f/649aba2bcc8ad211a959278d.pdf

PHOSPHORESCENT CYCLOMETALATED Ir(III) COMPLEXES WITH ACETYLIDE AND ISOCYANIDE LIGANDS

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