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Synthesis and Characterisation of Thiophene‐Functionalised Lanthanoid Diketonate Clusters with Solvent‐Modulated Europium Luminescence
Author(s) -
Andrews Philip C.,
Deacon Glen B.,
Gee William J.,
Junk Peter C.,
Urbatsch Aron
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200105
Subject(s) - chemistry , luminescence , lanthanide , europium , thiophene , ligand (biochemistry) , cluster (spacecraft) , quenching (fluorescence) , infrared spectroscopy , solvent , photochemistry , inorganic chemistry , crystallography , fluorescence , organic chemistry , ion , biochemistry , physics , receptor , optoelectronics , quantum mechanics , computer science , programming language
The reaction of a thiophene‐containing ligand, ( Z )‐3‐hydroxy‐3‐phenyl‐1‐(thiophen‐2‐yl)prop‐2‐en‐1‐one (Hhtp), with hydrated lanthanoid chloride salts has resulted in the isolation of two tetranuclear clusters, [Ln 4 (μ 3 ‐OH) 2 {(μ‐O)‐κ 2 ‐htp} 2 {(μ‐O) 2 ‐κ 2 ‐htp} 2 (κ 2 ‐htp) 6 ] [Ln = Nd ( 1 ), Eu ( 2 )] and an erbium pentanuclear cluster, [Er 5 (μ 3 ‐OH) 4 (μ 4 ‐OH){(μ‐O)‐κ 2 ‐htp} 4 (κ 2 ‐htp) 6 ] ( 3 ). The clusters have been characterised by elemental analysis, mass spectrometry, infrared spectroscopy and X‐ray single‐crystal structural determination. The luminescent properties of cluster 2 have been assessed, and, at 25 °C, quenching of luminescent emission was found to predominantly occur. However, incremental addition of selected coordinating solvents was found to promote luminescence at 25 °C, showing a linear relationship at low analyte concentrations.