161696-84-0Relevant academic research and scientific papers
Crystalline photochromism of N-salicylidene-2,6-dialkylanilines: Advantage of 2,6-dialkyl substituents of aniline for preparation of photochromic Schiff base crystals
Fukuda, Hisatane,Amimoto, Kiichi,Koyama, Hiroyuki,Kawato, Toshio
, p. 1578 - 1583 (2007/10/03)
N-(3,5-Dihalosalicylidene)-2,6-dialkylaniline derivatives were prepared andtheir structure and photochromic properties were investigated. From the X-ray crystallography, it was revealed that steric repulsion between the azomethine hydrogen atom and the alkyl groups at the 2,6-positions of the aniline ring lead to a non-planar molecular structure, which was effective for the crystals to exhibit photochromism. The relationship between photochromicity and crystal packing of N-(3,5-dichlorosalicylidene)-2,6-dialkylanilines series was also discussed. The 2,6-dialkylaniline method was suggested to be applicable to the preparation of phothochromic Schiff bases with various substituents in the salicylidene rings.
