The influence of aryl substituents on the supramolecular structures and photoluminescence of cyclic trinuclear pyrazolato copper(I) complexes

Kiyoshi Fujisawa, Mai Saotome, Yoko Ishikawa, David James Young

Research output: Contribution to journalArticlepeer-review

Abstract

Cyclic trinuclear complexes with group 11 metal (I) ions are fascinating and important to coordination chemistry. One of the ligands known to form these cyclic trinuclear complexes is pyrazolate, which is a bridging ligand that coordinates many transition metal ions in a Npz–M–Npz linear mode (Npz = pyrazolyl nitrogen atom). In these group 11 metal (I) ions, copper is the most abundant metal. Therefore, polynuclear Copper(I) complexes are very important in this field. The cyclic trinuclear Copper(I) complex [Cu(3,5-Ph2pz)]3 (3,5-Ph2pz = 3,5-diphenyl-1-pyrazolate anion) was reported in 1988 as a landmark complex, but its photoluminescence properties have hitherto not been described. In this study, we report the photoluminescence and two different polymorphs of [Cu(3,5-Ph2pz)]3 and its derivative [Cu(3-Me-5-Phpz)]3 (3-Me-5-Phpz = 3-metyl-5-phenyl-1pyrazale anion). The substituents in [Cu(3-Me-5-Phpz)]3 cause smaller distortions in the solid-state structure and a red-shift in photoluminescence due to the presence of intermolecular cuprophilic interactions.

Original languageEnglish
Article number3101
Pages (from-to)1-13
Number of pages13
JournalNanomaterials
Volume11
Issue number11
DOIs
Publication statusPublished - Nov 2021

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