Synthesis and characterization of photosensitive 4,4′-bis(dimethylamino)diphenylmethyl ethers of cellulose

✍ Scribed by Thomas Heinze; Ulrich Erler; Ute Heinze; Juan Camacho; Ulrich-Walter Grummt; Dieter Klemm

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 393 KB
• Volume: 196
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1995.021960613

✦ Synopsis

Abstract

Soluble 4,4′‐bis(dimethylamino)diphenylmethyl ethers of cellulose (2) with a degree of substitution from 0,5 to 1,0 were prepared by therification of cellulose dissolved in N,N‐dimethylacetamide/LiCl. These ethers 2 show typical absorption spectra with an absorption maximum at 265 nm. While in neutral and basic medium 2 are stable, under acidic conditions a significant cleavage of the ether bonds occurs and thereby the formation of Michler's hydrol blue (absorption maximum at 604 nm). 2 was found to be photoconducting as film cast from a N,N‐dimethylformamide solution, for instance. Preliminary studies of the behavior of solutions of 2 by irradiation by means of flash photolysis and UV spectroscopy were carried out as well.