Synthesis and photoreactions of aromatic diols containing bis (azo) and bis (o-nitrobenzyl) chromophores
نویسنده
چکیده
Aromatic diols containing bis (azo) and bis (o-nitrobenzyl) chromophores viz., (4hydroxyphenylazo)-2,2/-dinitrodiphenylmethane, 4-hydroxy-3-methylphenylazo-4/-hydroxyphenylazo-2,2/-dinitrodiphenyl methane and bis (4-hydroxy-3-methylphenylazo)-2-dinitrodiphenyl methane were synthesized from 4,4-diamino-2,2/-dinitrodiphenylmethane and phenol/0-cresol. As a result of photolysis, the azo group of the diols unergo trans-cis isomerisation and one of the o-nitrobenzyl groups of the diols undergo trans-cis isomerisation and one of the o-nitrobenzyl groups in them undergo redox reaction to nitronitrosocarbinol. There occurred a solubility difference between the irradiated and unirradiated diol. In solution, a photoswtiching behaviour was also observed.
منابع مشابه
Synthesis and Cyclic Voltammetric Studies of Bis[5-((4-Alkoxyphenyl)Azo)-N-(nPentyl, nDodecyl)-Salicylaldiminato] Copper(II) Complex Homologues
5-((4-alkoxyphenyl)azo)salicyladehyde, 5-((4-alkoxyphenyl)azo)-N-(npentyl, ndodecyl)-salicyladimine and bis [5-((4-alkoxyphenyl)azo)-N-(npentyl, ndodecyl)-salicyladiminato]copper(II) [alkoxy=OnCnH2n+1; n=3-7] homologues were synthesized and characterized by elemental analyses, mass and IR spectra. All complex homol...
متن کاملNew Thermally Stable Aromatic Polyimides Based on Aromatic Diamine 2,5-Bis(3-amino-4-methyl benzene)-1,3,4-oxadiazole (BAMO): Synthesis and Characterization
In current study, the synthesis and characterization of novel thermally stable polyimides (PIs) containing an 1,3,4-oxadiazole moiety based on a diamine, i.e. 2,5-bis(3-amino-4-methyl benzene)-1,3,4-oxadiazole (BAMO), have been reported. The polymers were characterized using FT-IR and elemental analysis (CHN). Thermal and mechanical behaviours of the prepared PIs were studied by thermo-gravimet...
متن کامل2-Aminoethanesulfonic acid immobilized on epichlorohydrin functionalized Fe3O4@WO3 (Fe3O4@WO3-EAE-SO3H (III)): A heterogeneous and reusable nanocatalyst for synthesis of α,α'-bis (substituted-benzylidene) cycloalkanones in solvent-free conditions
A green, efficient, chemoselective, facile and clean procedure is described and discussed for the synthesis of α, α'-bis (substituted-benzylidene) cycloalkanones in solvent-free conditions. The condensation reaction was carried out through the reaction of aromatic aldehydes with cycloalkanones in the presence of Fe3O4@WO3 (Fe3O4@WO3</s...
متن کاملUncatalyzed Synthesis of Arylmethylene[bis(5,5-dimethyl-3-hydroxy-2-cyclohexene-1-ones)] in Hot Water by Domino Knoevenagel/Michael Reactions
A simple and ecofriendly method was developed for the synthesis of arylmethylene[bis(5,5- dimethyl-3-hydroxy-2-cyclohexene-1-ones)] from the reaction of 5,5-dimethylcyclohexane- 1,3-dione and aromatic aldehydes in an aqueous media without any catalyst via Knoevenagel condensation followed by rapid Michael addition. No cyclization product was down to convert these enolic forms to xanthene deriva...
متن کاملSynthesis and Characterization of Novel Photoactive Poly(ether-amide)s Based on Highly Substituted Phenanthrimidazole
A new aromatic diamine monomer containing ether linkage based on the phenanthrimidazole ring, 1,1´-(4,4´- oxy bis(1,4-phenylene))bis(2-(4-aminophenyl)-1H-phenanthro[9,10-d]imidazole) was synthesized through four-components condensation of 4,4´-diamino diphenyl ether, 4-nitrobenzaldehyde, phenanthrene-9,10-dione and ammonium acetate in presence of acetic acid, followed by palladi...
متن کامل