Alkyl oranges

BINDING PARAMETERS OF ALKYL ORANGE DYES TO IMPRINTED GELS ... 

The imprint hypothesis of specific adsorption suggests that compounds which are structurally related to the specific compound will also show enhanced adsorption on a specific adsorbent (relative to the normal adsorbent). Numerous experimental data have been reported [e.g.. Refs. (110,111,113,123-127)] which amply confirm this prediction. Almost invariably, a specific adsorbent will show increased adsorption for all compounds even remotely similar to the specific compound. Presumably, the more closely such compounds resemble the specific compound, the greater their adsorption on the specific adsorbent. Dickey (113) has confirmed this for the various orange dyes adsorbents specific for one alkyl orange dye show greater specificity for adjacent homologs than for... 

Morrison J.L., Worsley M., Shaw D.R. and Hodgson G.W. (1959) The nature of the specificity of adsorption of alkyl orange dyes on silica gels. Can. J Chem. 37, 1986-1995. 

Haldeman R.G. and Emmett P.H. (1955) Specific adsorption of alkyl orange dyes on silica gel, J. Phys. Chem., 59, 1039-1043. 

The optical properties can be tuned by variations of the chromophores (e.g. type of side-chains or length of chromophorc). The alkyl- and alkoxy-substituted polymers emit in the bluc-gnecn range of the visible spectrum with high photolu-inincsccncc quantum yields (0.4-0.8 in solution), while yellow or red emission is obtained by a further modification of the chemical structure of the chromophores. For example, cyano substitution on the vinylene moiety yields an orange emitter. 

A method suitable for quantification of the functional class of bis(ethanol)amine antistatics, which lack UV chromophores, consists of reaction with methyl orange [53]. Atmer 163 (alkyl-diethanol amine) has been determined as a yellow complex at 415 nm after interaction with a bromophenol/cresole mixture [64]. Hilton [65] coupled extracted phenolic antioxidants with diazotised p-nitroaniline in strongly acidic medium and carried out identification on the basis of the visible absorption spectrum in alkaline solution. The antioxidant Nonox Cl in... 

---