Diffuse Reflection Spectra of Acid Clays Colored with Benzidine and Some Other Diamines
- 1 March 1970
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 43 (3) , 709-712
- https://doi.org/10.1246/bcsj.43.709
Abstract
In order to identify the species responsible for the coloration of acid clay upon the addition of benzidine and related aromatic diamines, the diffuse reflection spectra of colored clays in the presence of water, methanol, and benzene were examined in the range from 4 to 29 kK. The coloration appeared to be due to the oxidation of the diamines held between the silicate sheets to the mono-and di-valent cations. The former cations were found to be in various modes of intermolecular interaction, depending on the kind and amount of the liquid. The lightening of the color upon drying was attributed to the disproportionation of the monovalent cations to the divalent cation and the protonated molecule.This publication has 4 references indexed in Scilit:
- Diffuse Reflection Spectra of Some Würster SaltsBulletin of the Chemical Society of Japan, 1968
- Conductive Salt of the Radical Cation of 1,6-Diaminopyrene and the Radical Anion of 7,7,8,8-TetracyanoquinodimethaneThe Journal of Physical Chemistry, 1965
- SPECTROSCOPIC STUDIES ON THE COLOR REACTION OF ACID CLAY WITH AMINESThe Journal of Physical Chemistry, 1961
- Color Reactions between Clays and Amines1Journal of the American Chemical Society, 1940