This study demonstrates that complexes are formed between indole carboxylates and Ln3+ ions, providing evidence for proton transfer processes between indolecarboxylic acids and lanthanide acetate ions.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Abstract IR spectra of three indole-carboxylic acids, including 2-indolecarboxylic acid, 5-indolecarboxylic acid and 3-indoleacetic acid have been investigated in their crystalline form (KBr pellets) and in DMSO solution, in the presence and the absence of lanthanide (Dy3+, Er3+, Eu3+, Nd3+ and Yb3+) acetates. This study demonstrates that complexes are formed between indole carboxylates and Ln3+ ions, providing evidence for proton transfer processes between indolecarboxylic acids and lanthanide acetate ions. Monodentate and bidentate structures are proposed for these complexes.

This study demonstrates that complexes are formed between indole carboxylates and Ln3+ ions, providing evidence for proton transfer processes between indolecarboxylic acids and lanthanide acetate ions.

Infrared study of indolecarboxylic acids associations with lanthanide acetates