the synthesis and properties of new monoazo dyes derived from the diazonium salts of paminobenzoic acid, 3-trifluoromethyl aniline , 4-trifluoromethyl aniline are considered .theprepared compounds were characterized by uv-visible , ft-ir and h nmr spectroscopictechniques . the effect of varying solvent upon the absorption ability of p-amino benzoic acidcoupled with 4,4 —diethyl aniline , anilin...

Received 04 October 2012, Revised 15 December 2012, Accepted 16 December 2012 -------------------------------------------------------------------------------------------------------------------------------------------Abstract The present work demonstrates the comparative extraction efficiency of p-tert-butylcalix[4]arene (1) and its derivatives (2-4) toward a series of some selected reactive dy...

The compound 2-[(1E)-2-(1H-pyrrol-2-yl)ethenyl]-quinoxaline (PQX) is a promising fluorescent chromophore for the estimation of protein binding site polarity, due to its full-color solvatochromic fluorescence. A linear relationship was obtained between the peak emission wavenumber and E(T)(N) (normalized solvent polarity). The BSA binding site polarity was estimated from the solvatochromic plot.

The synthesis and properties of new monoazo dyes derived from the diazonium salts of paminobenzoic acid, 3-trifluoromethyl aniline , 4-trifluoromethyl aniline are considered .Theprepared compounds were characterized by UV-Visible , FT-IR and H NMR spectroscopictechniques . The effect of varying solvent upon the absorption ability of p-amino benzoic acidcoupled with 4,4 —diethyl aniline , anilin...

A photophysical study was carried out on a series of nine X-shaped cross-conjugated compounds based on the benzobisoxazole nucleus. These "molecular cruciforms" were terminally substituted with electron-rich 4-(N,N-dimethylamino)phenyl, electron-neutral phenyl or electron-poor 4-pyridyl groups. Intramolecular charge transfer (ICT) transitions in molecular cruciforms were shown to be activated t...

A b s t r a c t : The s o l v a t o c h r o m i s m , t h e r m o c h r o m i s m , p i e z o c h r o m i s m , h a l o c h r o m i s m , and p o t e n t i a l c h i r o s o l v a t o c h r o m i s r n o f s o l u t i o n s o f v a r i o u s p y r i d i n i u m N p h e n o x i d e b e t a i n e d y e s h a v e b e e n u s e d b y u s a n d o t h e r s t o s t u d y U V / V i s s p e c t r o s c...

In this paper, an electronic tongue/taste sensor array containing different interdigitated capacitor (IDC) sensing elements to detect different types of tastes, such as sweetness (glucose), saltiness (NaCl), sourness (HCl), bitterness (quinine-HCl), and umami (monosodium glutamate) is proposed. We present for the first time an IDC electronic tongue using sensing membranes containing solvatochro...