Abstract
A new set of lighter lanthanide complexes having general formula (GunH)3[Ln(tdp)3]·3H2O (Ln = La, Pr, Nd, and Sm) derived from thiodipropionic acid (H2tdpa) and guanidine carbonate [Gun.(H2CO3)1/2] were synthesized by template method in aqueous medium. These complexes were characterized by various physico-chemical techniques, such as elemental analysis, molar conductance, FT-IR, UV–Vis, TG–DTA (air and nitrogen atmosphere), and PXRD studies. In this manuscript, for first time, the sulfur content of the acid in the complexes has been estimated by simple volumetric analysis. From the thermal analysis, all of the complexes are assisted with water molecules, which decompose endothermic followed by exothermic decomposition to yield Ln2(SO4)3 as the end residue. All the complexes are stabilized by nine coordinated monocapped square antiprismatic or tricapped trigonal prismatic geometry and found to be monomeric in compositions, which is proposed by various physico-chemical techniques. The isomorphism of these complexes is revealed by PXRD technique. Furthermore, the luminescence properties of free acid and the synthesized complexes were studied at room temperature in solid state.
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Acknowledgements
S. P. wishes to thank URF for the award of a research fellowship in science for meritorious students under the University Research Fellowship. The author S. G. thanks the UGC-SAP-DRS II, New Delhi (India), for financial support. S. G. is also thankful for the award of UGC-Emeritus Fellowship by UGC, New Delhi, India.
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Packiaraj, S., Kousalya, L., Poornima, S. et al. New insight for the estimation of sulfur content from guanidinium tris(thiodipropionato)lanthanate(III) trihydrate: synthesis, thermal, and photoluminescent studies. Monatsh Chem 152, 263–273 (2021). https://doi.org/10.1007/s00706-020-02729-9
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DOI: https://doi.org/10.1007/s00706-020-02729-9