Bimetallic cyclometalated iridium complexes bridged by a BODIPY linker

Autor:	Thomas S. Teets, Karen Marroquin, Ku Sun Choung, Gregory D. Sutton
Rok vydání:	2020
Předmět:	Inorganic Chemistry chemistry.chemical_compound chemistry Ligand Excited state Pyridine Supramolecular chemistry chemistry.chemical_element Quantum yield Iridium BODIPY Photochemistry Phosphorescence
Zdroj:	Dalton Transactions. 49:13854-13861
ISSN:	1477-9234 1477-9226
DOI:	10.1039/d0dt02690e
Popis:	Presented here is a new class of supramolecular cyclometalated Ir(iii) complexes. The 2 : 1 assemblies include two phosphorescent cyclometalated Ir(iii) centers spanned by a BODIPY bridge with pyridine substituents at the β-pyrrole positions. The three complexes, which vary with respect to the cyclometalating ligand on iridium, are prepared via a simple one-pot procedure, with the target complexes isolated in 31-75% yield. The photophysics of these new compounds are described in detail. All complexes are strongly photoluminescent, with fluorescence from BODIPY being the dominant emission pathway. One member of the series has a near-unity photoluminescence quantum yield, significantly enhanced relative to the free BODIPY. The cyclometalating ligand on iridium controls the energy of the Ir-centered triplet excited state, but in all cases energy transfer from the Ir centers to the BODIPY quenches almost all phosphorescence. This work outlines a new, simple synthetic method for accessing supramolecular complexes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68756ab2f0bf49388a0a8b0f1c808b07 https://doi.org/10.1039/d0dt02690e Zobrazit plný text záznamu