On the coupling of aryldiazonium salts with N,N-disubstituted 2-aminothiophenes and some of their carbocyclic and heterocyclic analogues
作者:Horst Hartmann、Ines Zug
DOI:10.1039/b006803i
日期:——
substitution pattern at C(5), with aryldiazonium salts 1 either at their C(3) or C(5) position yielding the corresponding 3-arylazo-2-morpholinothiophenes 9 or, under elimination of the substituent at C(5), 5-arylazo-2-morpholinothiophenes 10. This reaction contrasts to the behaviour of 5-morpholinothiazoles 8 and dimethylaniline 13 towards the same diazonium salts 1 which are unable to couple with these compounds
Ferroelectric liquid crystal composition, liquid crystal optical device produced by using the ferroelectric liquid crystal composition, and method of producing the liquid crystal optical device
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0352637A2
公开(公告)日:1990-01-31
A ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material;
a liquid crystal optical device comprising
a layer of the ferroelectric liquid crystal composition, the (A) ferroelectric liquid crystal material in the ferroelectric liquid crystal composition has been uniaxially oriented and
two substrates which
support the layer of the ferroelectric liquid crystal composition between them and
carry on their surfaces facing each other their respective electrode layers, at least one of the electrode layers being a transparent electrode layer; and
a method of producing the liquid crystal optical device, which method comprises orienting a liquid crystal optical device yet to be oriented which includes
a layer of the ferroelectric liquid crystal composition and
two flexible substrates which
support the layer of the ferroelectric liquid crystal composition between them and
carry on their surfaces facing each other their respective electrode layers,
by subjecting the liquid crystal optical device yet to be oriented to a bending treatment.
Preparation and UV/Vis Spectroscopic Characterization of N,N-Disubstituted 2-Amino-5-arylazoselenazoles and Some of Their Carbocyclic and Heterocyclic Analogues
By coupling of aryldiazonium salts 5 with N,N-disubstituted 2-amino-5H-selenazoles 4 deeply coloured 5-arylazo-substituted 2-amino-selenazoles 6a-6l have been prepared and their solvatochromic properties deter-mined by means of UV/Vis spectroscopy, and compared with the ones of several other arylazosubstituted N,N'-dialkylanilines 7a-7d, 2-(N,N-dialkylamino)-thiophenes 8a-8e, and 2-(N,N-dialkylamino)-thiazoles 9a-9c.