79146-03-5Relevant academic research and scientific papers
BORON PHOTOCHEMISTRY. XVI. BASE STABILIZATION OF DIMESITYLBORYL-CONTAINING DYES AND RELATED 11B NMR STUDIES
Glogowski, M. E.,Zumbulyadis, N.,Williams, J. L. R.
, p. 97 - 108 (2007/10/02)
The UV-visible spectral shifts observed from p-dimesitylboryl-containing dyes in alcohol/sodium hydroxide solutions are caused by attack of the base on the boron atom.This attack produces the light-sensitive, tetravalent, "ate" structure.Dyes have been synthesized with 6 methyl groups ortho to the boron.These dyes are stable to base.The 11B NMR spectra of a number of dyes and model compounds containing the dimesitylborylphenyl moiety reveal evidence of adduct formation in donor solvents.No adduct formation occurs when 5 or 6 methyl groups surround the boron atom.
BORON PHOTOCHEMISTRY XIV. THE DIMESITYLBORYL GROUP AS AN AUXOCHROME IN DYES: THE SYNTHESIS OF para-SUBSTITUTED DIMESITYLBORYLPHENYLAZONAPHTHOL DYES
Glogowski, M. E.,Williams, J.L.R.
, p. 1 - 8 (2007/10/02)
The dimesitylboryl group is a new auxochrome.This group was evaluated by comparison of 4--1-naphthol (III) with 4--1-naphthol (IV) and of the substituted N--1,3-benzenedisulfonamide (VIIIa) with N--1,3-benzenedisulfonamide (VIIIb).The syntheses of 5-hydroxy-8-(4-dimesitylborylphenylazo)-1-naphthyl amine (IX) and α-propionic acid (X) are reported.The visible spectra of the dimesitylboryl-containing dyes and those of the nitro analogs were similar in shape.The spectral shifts of the dimesitylboryl compounds are as great as those of the corresponding nitro analogs.However, the boryl-substituted dyes required a nondonor medium for alkalinity-induced spectral shifts.As an auxochrome the dimesitylboryl group is roughly equivalent to a nitro group.
