Abstract
Six new Ln(III) complexes viz., [Gd(tptz)(SCN)3(CH3OH)2OH2]·CH3OH (1), [Eu(tptz)(SCN)3(CH3OH)2OH2]·CH3OH (2), [Tb(tptz)(SCN)3(OH2)3]4 (3), [Gd(tptz)(OBz)2(μ-OBz)OH2]2·2H2O (4), [OH2(OBz)2(tptz)Eu1(μ-OBz)2Eu2(tptz)(OBz)2OH2]·CH3OH·7H2O (5), and {[Tb1(tptz)(OBz)2(μ-OBz)]2·[Tb2(tptz)(OBz)3CH3OH]2}·2CH3OH·4H2O (6) (Ln = Gd, Eu, Tb; tptz = 2,4,6-tris(2-pyridyl)-1,3,5-triazine; BzONa = sodium benzoate), have been synthesized and characterized by physicochemical methods including single-crystal X-ray crystallography. The X-ray studies demonstrate that 1–3 are mononuclear, whereas 4–6 are binuclear. The photophysical properties of 1–6 have been studied with ultraviolet absorption and emission spectral studies. Their thermal properties have been studied by thermogravimetric (TG) and derivative thermogravimetric analysis (DTG), demonstrating that the final product after decomposition was Ln2O3 for all these complexes.
Acknowledgements
NG gratefully acknowledges CSIR, New Delhi, India, for financial assistance and IITR for instrumental facilities.