2, 4-Dichlorophenoxyacetic Acid Derived Schiff Base and Its Lanthanide(III) Complexes: Synthesis, Characterization, Spectroscopic Studies, and Plant Growth Activity. (25th November 2012)

• Record Type: Journal Article
• Authors: Naik, Ganesh N.; Bakale, Raghavendra P.; Pathan, Aishakhanam H.; Ligade, Shashikala G.; Desai, Shreenivas A.; Gudasi, Kalagouda B.
• Other Names: Mintcheva Neli Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2013(2013)
• Publication Date: 2012-11-25
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2013/810892
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : 2, 4-Dichlorophenoxyacetic acid derived Schiff base (HL) and its lanthanide [La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Dy(III), Y(III)] complexes were synthesized and characterized by various spectroscopic ( 1 H, 13 C, DEPT and 2D HMQC NMR, FT-IR, UV-Vis, and mass) techniques and other analytical methods. HL exhibits "E" and "Z" isomerism and was confirmed by variable temperature 1 H NMR studies. The spectral and analytical data reveals the bidentate coordination of HL to lanthanide(III) ion, through carboxylic acid group via deprotonation. Fluorescence spectrum of europium complex shows bands at 578, 592, and 612 nm assignable to D 0 5 → F 0 7, D 0 5 → F 1 7, and D 0 5 → F 2 7, respectively. Auxin activity of HL and lanthanum(III) complex on wheat seeds ( Triticum durum ) was measured at different concentrations. The percentage germination, root length, and shoot length were recorded. An enhancement in the plant growth activity of the ligand was observed on complexation and the best activity was observed at 10 −6 M concentration.