177482-64-3Relevant articles and documents
Reversible optical manipulation of superconductivity
Ikegami, Aya,Suda, Masayuki,Watanabe, Takeshi,Einaga, Yasuaki
, p. 372 - 374 (2010)
Chemical Equation Presented Flicking the switch: Photoirradiation has a dramatic effect on the superconducting properties of a passivated ultrathln Nb film functlonallzed with a photochromic self-assembled azobenzene (AZ) monolayer (see picture). These effects can be attributed to photoisomerization-induced changes in the amount of charge transfer between the substrate and the photochromic monolayer. The changes are accompanied by alternation of the surface dipoles.
Method for preparing polyimide polymer with azo-pyrimidine structure unit
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, (2016/10/09)
The invention relates to a method for preparing a diamine monomer with an azo-pyrimidine structure and a method for preparing a polyimide polymer by adopting the diamine monomer with the azo-pyrimidine structure. The preparation method comprises the following steps: carrying out a coupling reaction on 4-substituted aniline and sodium phenate to obtain 4-hydroxy-4'-substituted azobenzene; and carrying out nucleophilic substitution on the 4-hydroxy-4'-substituted azobenzene and dibromoalkane to generate bromo-azobenzene, and reacting the bromo-azobenzene with 4,6-diamido-2-mercaptopyrimidine to obtain the diamine monomer; and carrying out condensation polymerization on the diamine monomer with dianhydride to obtain polyimide. The pyrimidine structure is introduced into the diamine monomer, so that the charge transfer complex effect of aromatic rings of polyimide is reduced, and the glass transition temperature of the polyimide is reduced; and the azo group has photo-induced anisotropy, and an azo unit is introduced into the polyimide by alkyl chains having different lengths, so that the heterogeneous degree of the azo group can be effectively regulated, and the application of the polyimide in alignment films and other optical fields can be improved to a great extent.
Design, synthesis and photoisomerization behavior of novel azobenzene-based dyes containing different alkyl chains and isolation groups
Tkachenko, Ihor M.,Kobzar, Yaroslav L.,Purikova, Olha G.,Tolstov, Alexander L.,Shekera, Oleg V.,Shevchenko, Valery V.
, p. 5505 - 5510 (2016/11/18)
A series of reactive azo dyes based on 4-phenylazophenol, containing hexenyloxy-, allyloxy-ethoxy-propoxy- and tetramethyl-disiloxanyl-propoxy substituents were synthesized. Additionally, allyl-functionalized azo-based chromophores with changeable isolati
Preparation and optical characteristics of layered perovskite-type lead-bromide-incorporated azobenzene chromophores
Sasai, Ryo,Shinomura, Hisashi
, p. 452 - 458 (2013/02/23)
Lead bromide-based layered perovskite powders with azobenzene derivatives were prepared by a homogeneous precipitation method. From the diffuse reflectance (DR) and photoluminescence (PL) spectra of the hybrid powder materials, the present hybrids exhibit
Solvent-dependent photoresponsive conductivity of azobenzene-appended ionic liquids
Zhang, Shiguo,Liu, Shimin,Zhang, Qinghua,Deng, Youquan
, p. 6641 - 6643 (2011/07/29)
A new class of azobenzene-based photoresponsive ionic liquids was prepared and showed reversible modulation of ionic conductivity in specific solvents under alternative UV/visible light irradiation.
Thermal properties of liquid-crystalline diols and corresponding bis-urethanes with mesogenic groups of various structures in side chains
Kaspar,Hamplova,Novotna,Studenovsky,Ilavsky
, p. 17 - 30 (2007/10/03)
The liquid-crystalline dials with mesogenic groups of different structures were synthetized and their temperature behavior and existence of mesophases were determined. These compounds were also reacted with phenylisocyanate to form bis-urethanes at the ra
