Color tuning and noteworthy photoluminescence quantum yields in crystalline mono-/dinuclear ZnII complexes

Mario Argeri, Fabio Borbone, Ugo Caruso, Mauro Causà, Sandra Fusco, Barbara Panunzi, Antonio Roviello, Rafi Shikler, Angela Tuzi

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

A series of ZnII complexes with an O,N,O tridentate core is reported. Four species of the general formula ZnLiPy2 were obtained from pyridine, where Li is a substituted 4-[(aroylhydrazono)methyl]-3-hydroxyphenyl 4-(octyloxy)benzoate group. Crystal structures were solved by single-crystal X-ray diffraction. Nematogenic phase behavior was detected only for the ligands. Photoluminescence spectra were recorded both in solution and in the solid state, and the complexes showed noteworthy photoluminescence in the solid state with wavelengths tunable by varying the aroyl group. Medium to very high photoluminescence quantum yields (PLQY) were recorded on the crystalline complexes obtained in their mononuclear coordination environments. In the case of a 4-nitrobenzoyl substituent on the ligand, a dinuclear complex with formula Zn2L42Py2 showed an unprecedented and exceptionally high PLQY value for a crystalline zinc complex. Molecular and periodic calculations were performed by using Density Functional Theory (DFT).

Original languageEnglish
Pages (from-to)5916-5924
Number of pages9
JournalEuropean Journal of Inorganic Chemistry
Volume2014
Issue number34
DOIs
StatePublished - 1 Jan 2014

Keywords

  • Luminescence
  • Schiff bases
  • Tridentate ligands
  • Zinc

ASJC Scopus subject areas

  • Inorganic Chemistry

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