Abstract
New procedure for preparation of glycine and alanine triiodide charge transfer complexes by solid-solid interactions were investigated using different spectroscopic tools. The triiodide charge transfer complexes were prepared by grinding of potassium iodide, iodine and amino acid with 1:1:1 molar ratio in the presence of few drops of methanol solvent. The formulas of two solid amino acid charge transfer complexes were discussed using the infrared, Raman laser, UV-Vis. and electronic spectra, and thermal analyses. The structural changes of both complexes were probed using the positron annihilation lifetime (PAL) and positron annihilation Doppler broadening (PADB) techniques. The results reveal that most of PAL and PADS parameters are strongly correlated with the molecular weight of the prepared CT complexes. (C) 2016 Elsevier B.V. All rights reserved.