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Investigation of Luminescent Triplet States in Tetranuclear Cu$^{I}$ Complexes: Thermochromism and Structural Characterization

Boden, Pit; Di Martino-Fumo, Patrick; Busch, Jasmin M. 1; Rehak, Florian R. 2; Steiger, Sophie; Fuhr, Oliver 3; Nieger, Martin; Volz, Daniel 1; Klopper, Willem 2; Bräse, Stefan 1; Gerhards, Markus
1 Institut für Organische Chemie (IOC), Karlsruher Institut für Technologie (KIT)
2 Institut für Physikalische Chemie (IPC), Karlsruher Institut für Technologie (KIT)
3 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)

Abstract:
To develop new and flexible Cu$^{I}$ containing luminescent substances, we extend our previous investigations on two metal‐centered species to four metal‐centered complexes. These complexes could be a basis for designing new organic light‐emitting diode (OLED) relevant species. Both the synthesis and in‐depth spectroscopic analysis, combined with high‐level theoretical calculations are presented on a series of tetranuclear Cu$^{I}$ complexes with a halide containing Cu$_{4}$X$_{4}$ core (X=iodide, bromide or chloride) and two 2‐(diphenylphosphino)pyridine bridging ligands with a methyl group in para (4‐Me) or ortho (6‐Me) position of the pyridine ring. The structure of the electronic ground state is characterized by X‐ray diffraction, NMR, and IR spectroscopy with the support of theoretical calculations. In contrast to the para system, the complexes with ortho‐substituted bridging ligands show a remarkable and reversible temperature‐dependent dual phosphorescence. Here, we combine for the first time the luminescence thermochromism with time‐resolved FTIR spectroscopy. Thus, we receive experimental data on the structures of the two triplet states involved in the luminescence thermochromism. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000129566
Veröffentlicht am 11.02.2021
Originalveröffentlichung
DOI: 10.1002/chem.202004539
Scopus
Zitationen: 12
Web of Science
Zitationen: 12
Dimensions
Zitationen: 13
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Biologische und Chemische Systeme (IBCS)
Institut für Physikalische Chemie (IPC)
Universität Karlsruhe (TH) – Interfakultative Einrichtungen (Interfakultative Einrichtungen)
Karlsruhe Nano Micro Facility (KNMF)
Karlsruhe School of Optics & Photonics (KSOP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 22.05.2021
Sprache Englisch
Identifikator ISSN: 0947-6539, 1521-3765
KITopen-ID: 1000129566
HGF-Programm 43.33.11 (POF IV, LK 01) Adaptive and Bioinstructive Materials Systems
Erschienen in Chemistry - a European journal
Verlag John Wiley and Sons
Band 27
Heft 17
Seiten 5439-5452
Nachgewiesen in Dimensions
Web of Science
Scopus
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