Synthesis and photophysical properties of multimetallic gold/zinc complexes of (P,N,N,N,P) and (P,N,N) ligands

Novel ligands carrying bipyridine and terpyridine analogue motifs were synthesized. These N-donor sites were linked to phosphine moieties with alkyl chains of defined lengths allowing heterobi- and -trimetallic complexes to be obtained. The orthogonal coordination behavior of the donor centers is pr...

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Bibliographic Details
Published in:New journal of chemistry 2022-02, Vol.46 (9), p.462-471
Main Authors: Walg, Simon P, Dietrich, Fabian, Grün, Anneken, Cayir Kücükdisli, Merve, Sun, Yu, Thiel, Werner R, Gerhards, Markus
Format: Article
Language:English
Subjects:
Coordination compounds
Fluorescence
Gold
Lewis acid
Ligands
Phosphines
Selectivity
Structural analysis
Zinc
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Summary:Novel ligands carrying bipyridine and terpyridine analogue motifs were synthesized. These N-donor sites were linked to phosphine moieties with alkyl chains of defined lengths allowing heterobi- and -trimetallic complexes to be obtained. The orthogonal coordination behavior of the donor centers is proved by their selectivity in coordinating zinc( ii ) as a hard and gold( i ) as a soft Lewis acid. The ligands and complexes obtained in this manner were characterized by means of spectroscopic methods and X-ray structure analysis. Their photophysical properties were explored by measuring electronic absorption and fluorescence spectra as well as fluorescence lifetimes and were compared with the results of DFT calculations, all analyzed taking into account the issue of cooperativity. Orthogonal coordination of gold and zinc yields mono- and bimetallic complexes, which are investigated concerning their photophysics.
ISSN:1144-0546
1369-9261
DOI:10.1039/d1nj05806a