Use of thiophenes as pH indicators, in particular in a non-enzymatic glucose test
申请人:MILES INC.
公开号:EP0248112A2
公开(公告)日:1987-12-09
The invention relates to the use of thiophenes of the general formula (I)
where: R1 and R2 independently of one another stand for hydrogen, substituted alkyl, cycloalkyl, aralkyl or R1 and R2 form a ring, n is the number 0 or 1, R3 is a pendant group and R4 to R9 stand for dye chemistry substituents, as pH-indicators. The indicators are especially suitable for use in a nonenzymatic test for hexoses, as for instance, glucose.
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.