Photochromic Molecular Glass: Synthesis and Photochromic Properties of 4-(Bis(4-methylphenyl)amino)azobenzene.

Photo- and electroactive amorphous molecular materials—molecular design, syntheses, reactions, properties, and applications

“…11,[28][29][30][31][32][33] The synthesised azobenzene-based compounds include 4-[bis(4-methylphenyl)amino]azobenzene (BMAB), 4-[bis(4-methylphenyl)amino]-49-methoxyazobenzene (MeO-BMAB), 4-[di(biphenyl-4-yl)amino]azobenzene (DBAB), 4-[bis (9,9-dimethylfluoren-2-yl)amino]azobenzene (BFlAB), 4-[ bis ( 9, 9 -dimethylfluoren -2 -yl) amino ] -49-nitroazobenzene (BFlAB-NO 2 ), 4,49-bis[bis(4-methylphenyl)amino]azobenzene (BBMAB), and 4,49-bis[bis(49-tert-butylbiphenyl-4-yl)amino]-azobenzene (t-BuBBAB). 11,28,29,32,33 BFlAB was synthesised by the Ullmann coupling reaction of 4-aminoazobenzene with 2-iodo-9,9-dimethylfluorene.…”

Formation of a Surface Relief Grating Using a Novel Azobenzene-Based Photochromic Amorphous Molecular Material

“…Control of the position and magnitude of the optical stop band of colloidal crystals is often desired. [26] The second system of coated particles was obtained by exposing the PAH/PSS-coated PS spheres (with different coating thicknesses) to a 4-dimethylaminopyridine-stabilized gold nanoparticle (Au np ) dispersion (Au np diameter = 6 ± 2 nm), [27] which results in the nanoparticles infiltrating and binding to the polyelectrolyte (PE) layers, yielding a dense nanoparticulate gold coating. [5,8] The stop band of 3D crystalline arrays fabricated from silica and polystyrene bare colloid spheres can also be altered by sintering the samples at elevated temperatures, thus reducing the lattice spacing, [22,23] or by infiltrating with materials (e.g., solvents) with different refractive indices.…”

A novel family of photochromic amorphous molecular materials based on dithienylethene

“…We have performed a series of studies on the creation of amorphous molecular materials 5,6 and developed a novel family of photochromic amorphous molecular materials containing an azobenzene moiety. 7,8 We report here the synthesis and photochromic properties of a novel family of photochromic amorphous molecular materials based on dithienylethene, 1- Compound 2o was synthesised by lithiation of 3 (5.4 g, 12 mmol) followed by reaction with 1,2,3,3,4,4,5,5-octa¯uorocyclopentene (1.2 ml, 8.9 mmol). Compounds 1o and 2o were puri®ed by silica-gel column chromatography, followed by recrystallisation from THF±ethanol and toluene±hexane to give 1.8 g (yield 33%) and 2.5 g (yield 45%), respectively.…”