Symmetry correlations between crystallographic and photoluminescence study of ternary β-diketone europium(iii) based complexes using 1, 10-phenanthroline as the ancillary ligand. Issue 42 (16th October 2019)

• Record Type: Journal Article
• Authors: Alexander, Orbett T.; Kroon, Robin E.; Brink, Alice; Visser, Hendrik G.
• Is Part Of: Dalton transactions. Volume 48:Issue 42(2019)
• Page Start: 16074
• Page End: 16082
• Publication Date: 2019-10-16
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9dt02580d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : This work entails deep red emitting Eu III based complexes with a variety of ternary β-diketonate ligands and 1, 10-phenanthroline as the ancillary ligand in the system. Abstract : This work entails deep red emitting Eu III based complexes with a variety of ternary β-diketonate ligands and 1, 10-phenanthroline as the ancillary ligand in the system. The solid state structure and spectroscopic analysis has been outlaid in terms of photoluminescence and crystallography. A luminescence quantum efficiency of 50% was obtained for the [ tris-(4, 4, 4-trifluoro-1-chlorophenyl-butanedione)mono-(1, 10-phenanthroline)europium(iii )] complexes. Moreover, complexes [tris-(2, 2, 6, 6-tetramethyl-heptanedione)mono-(1, 10-phenanthroline) europium(iii )] and {[hexa-(benzyl carboxylic acid) bis-(1, 10-phenanthroline)di-europium(iii )]-μ-[κ 2 -O, O′-(benzyl carboxylic acid)]2 } were found to also have quantum yields of 9% and 28% with respective sensitization efficiencies of 85%, 15% and 58%. These results were articulated with crystallographic details pertaining to the nature of coordination and the effect of steric and electronic properties thereof which somewhat impacts the Eu–N bond distances. A symmetry correlation was drawn between the crystallographic data and the photoluminescence data.