Issue 119, 2015

Homochiral luminescent lanthanide dinuclear complexes derived from a chiral carboxylate

Abstract

A new family of homochiral lanthanide dinuclear complexes based on a chiral carboxylate, namely [Ln(R-pba)3(phen)]2 (Ln = La (1), Ce (2), Pr (3), Nd (4), Sm (5), Eu (6), Gd (7), Tb (8), Dy (9) and Ho (10), R-pba = (R)-2-phenylbutyric acid, phen = 1,10-phenanthroline), have been synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses and IR spectra. Complexes 1–10 are isostructural and crystallize in the chiral space group P21. Their optical activity and enantiomeric nature were confirmed by the circular dichroism spectra. Complexes 6, 8 and 9 exhibit strong fluorescent emissions with typical narrow emission bands of lanthanide ions and 6 and 8 display relatively high quantum yields. Magnetic investigations revealed that the weak antiferromagnetic exchange and/or the depopulation of the Ln(III) excited Stark sub-levels which exist in 7–10.

Graphical abstract: Homochiral luminescent lanthanide dinuclear complexes derived from a chiral carboxylate

Supplementary files

Article information

Article type
Paper
Submitted
22 Jul 2015
Accepted
05 Nov 2015
First published
09 Nov 2015

RSC Adv., 2015,5, 98097-98104

Author version available

Homochiral luminescent lanthanide dinuclear complexes derived from a chiral carboxylate

H. Wen, X. Xie, S. Liu, J. Bao, F. Wang, C. Liu and J. Liao, RSC Adv., 2015, 5, 98097 DOI: 10.1039/C5RA14559G

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