Synthesis, crystal structure, and conjugation properties of phenanthroline copper phosphine complexes

Hyungsock Suh, Dominick J. Casadonte, Louisa Hope-Weeks, Han Je Kim, Beomsik Kim, Taesun Chang

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Facial synthetic method of 4,7-position conjugation extended phenanthrolines and X-ray structure of copper phosphine phenanthroline complexe were reported. The crystal structures showed π-stacking and hydrogen bonding, and a small torsional angle between phen and phenylacetylene. These complexes exhibited strong conjugation dependant MLCT luminescence. The electronic and fluorescence spectra displayed a gradual red shift of the MLCT band as the conjugation increased. The presence of the phenyl groups reduced the energy of the π state in the d-π MLCT transition, allowing for the red shift. The electron-donating tri-isopropylsilyl (TIPS) groups on the ethynyl moiety increased the energy of the MLCT charge vector, allowing for the blue shift at the luminescence.

Original languageEnglish
Pages (from-to)710-714
Number of pages5
JournalInorganica Chimica Acta
Volume394
DOIs
StatePublished - Jan 1 2013

Keywords

  • Copper complex
  • Luminescence
  • MLCT
  • Mixed ligand diimine complex
  • Phenanthroline

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