Equilibria and kinetics of aluminium(III) complex formations with semi-xylenol orange and semi-methylthymol blue

Photooxidized psoralen solutions possess a variety of biological effects, which implementation mechanism may presumably involve hydroperoxides. Here, the hydroperoxide content in photooxidized psoralen solutions was assessed using photometric FOX assay (from Ferrous Oxidation + Xylenol Orange). FOX reagent with 10× content of Xylenol Orange, modified for quantitative analysis of up to 50 μM of hydroperoxides in aqueous phase was used in experiments. During photooxidation of 0.1 mM psoralen in phosphate buffer solution, hydroperoxide production increases with dose of UVA irradiation (~2.5 μM eq. of H2O2 for dose of 252 kJ/m2 and ~11 μM eq. of H2O2 for dose of 1512 kJ/m2) and reaches ~16.5 μM eq. of H2O2 at the highest dose investigated (3024 kJ/m2). A comparison of kinetics of psoralen photolysis and hydroperoxide generation allows us to suggest that generation of hydroperoxide results from the secondary photochemical processes involving psoralen photoproducts, presumably from photoinduced autooxidation of aldehydic photoproducts of psoralen.

Download Full-text

Spatiotemporal Patterns and Nonclassical Kinetics of Competing Elementary Reactions: Chromium Complex Formation with Xylenol Orange in a Capillary

The Journal of Physical Chemistry A ◽

10.1021/jp962994e ◽

1997 ◽

Vol 101 (15) ◽

pp. 2819-2827 ◽

Cited By ~ 13

Author(s):

Andrew Yen ◽

Anna L. Lin ◽

Yong-Eun Lee Koo ◽

Baruch Vilensky ◽

Haim Taitelbaum ◽

...

Keyword(s):

Complex Formation ◽

Xylenol Orange ◽

Spatiotemporal Patterns ◽

Elementary Reactions ◽

Chromium Complex ◽

Kinetics Of

Download Full-text

Formation constants of alkaline-earth metal complexes with xylenol orange and methylthymol blue

Talanta ◽

10.1016/0039-9140(74)80213-4 ◽

1974 ◽

Vol 21 (6) ◽

pp. 676-679 ◽

Cited By ~ 8

Author(s):

T. Yoshino ◽

H. Okazaki ◽

S. Murakami ◽

M. Kagawa

Keyword(s):

Metal Complexes ◽

Alkaline Earth ◽

Xylenol Orange ◽

Earth Metal ◽

Formation Constants ◽

Alkaline Earth Metal ◽

Methylthymol Blue

Download Full-text

Study of competitive adsorption of acid dyes on magnetic quaternary chitosan salt

Water Science & Technology ◽

10.2166/wst.2014.276 ◽

2014 ◽

Vol 70 (4) ◽

pp. 649-655 ◽

Cited By ~ 3

Author(s):

Conglu Zhang ◽

Xiaohong Hou ◽

Ning Liang ◽

Yueyue Ding ◽

Xiaomin Hu

Keyword(s):

Xylenol Orange ◽

Multicomponent System ◽

Ternary Systems ◽

Acid Dyes ◽

Alizarin Red ◽

Preferential Adsorption ◽

Pseudo Second Order ◽

Kinetics Of ◽

Binary And Ternary Systems ◽

Chitosan Salt

Magnetic quaternary chitosan salt CS/EPTAC/Fe3O4 was used for the removal of acid red 1 (AR1), xylenol orange (XO) and alizarin red (AR) in single, binary and ternary systems. In the single system, the maximal adsorption capacity was 781.55 for AR1, 537.40 for XO and 992.61 mg g−1 for AR at pH 3.0 and 25 °C. The adsorption kinetics of the three dyes followed the pseudo-second-order model. In the multicomponent system, preferential adsorption was observed for AR at low adsorbent quantities due to the small size of the molecule. When the adsorbent amount was greater, AR1 was adsorbed first because of the greater number of sulfonic acid roots. In the entire adsorption process, XO always adsorbed most slowly.

Download Full-text