Naphthoquinone sulphonate solution

Location Reagents. For Systems TL and TM. Naphthoquinone sulphonate solution. Spray the plate with the reagent, then spray with a 10% v/v solution of hydrochloric acid and heat at 110° for 20 minutes. 

Naphthoquinone Sulphonate Solution dissolve 0 3 g of sodium l,2-naphdioqumone-4-sulphonate m 100ml of ethanol water (1 1)... 

Interest continues in the photoreactions of quinones, especially anthraquinones, in which substitution occurs in one of the aromatic rings. In the 1,4-naphthoquinone series, irradiation of an aqueous solution of sodium 1,4-naphthoquinone-2-sulphonate gives a mixture of products including the 5-hydroxy-compound the effects of pH, irradiation wavelength, solvents, and radical scavengers are described. Replacement of halogen by butylamino in anthraquinone (103) is... 

Irradiation of sodium anthraquinone sulphonates in micelles leads to photoreduction to the corresponding radical anions, whose lifetimes are much lengthened compared with those obtained in the absence of surfactants.31 It is reported that photoreduction of anthraquinone sulphonates in basic water-alcohol solutions can lead on to desulphonation of the 9,10-dihydroxyanthracenes which are produced.32 Photoreduction of sodium l,2-naphthoquinone-4-sulphonate in water gives the 1,2-dihydroxy-compound.33 In this reaction,... 

ABSTRACT. The complex formation between cyclodextrins (a-,3-,y-CD s and dimethyl-3-CD) and quinones (three 9,10-anthraquinone sulphonates and two 1,4-naphthoquinones) in the water-ethylene glycol 1 1 mixture solution at 77 K was investigated using the n7T phosphorescence spectra and their excitation spectra and lifetimes of the quinones. It was concluded on the basis of the experimental results that the complexes have various structures according to the CD-quinone combination used. Vitamin K3 was found to form the photodimer very effi-... 

Free guanidine treated with 1 2-naphthoquinone-4-sodium sulphonate and alkali yields after about ten minutes a brown solution which tmns bright red on addition of nitric acid (Sullivan s test, 1935). Ammonia, methylamine and indole, but none of the natural guanidine derivatives, give similar reactions. 

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