52046-71-6Relevant articles and documents
Europium(III) β-diketone complex as portable luminescent chemosensor for naked eye Cu2+ detection and recyclable on-off-on vapor response
Cao, Fangyi,Yuan, Zheng,Liu, Junhua,Ling, Jun
, p. 102535 - 102541 (2015)
A novel Eu3+ complex coordinated by polymers with β-diketone pendant groups (Eu3+-PDKMA) has been synthesized for Cu2+ cation and acid-base vapor detections. Its sensitive and selective response to Cu2+ is confi
Influence of substituent on UV absorption and keto-enol tautomerism equilibrium of dibenzoylmethane derivatives
Zawadiak, Jan,Mrzyczek, Marek
supporting information, p. 815 - 819 (2012/11/13)
UV absorption spectra of dibenzoylmethane and its 23 derivatives with acetamide, tert-butyl, chloride, fluoride, hydroxyl, methyl, methoxy and nitro substituents in aromatic rings were collected. General influence of substituent on absorption maxima and absorption intensity was defined. Hyperchromic effects were observed for diketones with electron-donating groups in para postion. The keto-enol tautomerism equilibrium constant of obtained compounds was investigated with 1H NMR spectroscopy. Significant changes of equilibrium were observed only for ortho substituted compounds. Results revealed dissimilarity of substituent effects on absorption and keto-enol tautomerism of aromatic β-diketones.
Sunblocking polymers and their novel formulations
-
, (2008/06/13)
Novel polymeric biologically inert compositions and their intermediates, as well as sunscreen formulations comprising them and making them invisible, are provided for broad range protection from ultraviolet radiation. Acryl polymers comprising at least two different ultraviolet absorbing moieties having different light absorbing ranges are employed in conjunction with other monomers to provide sunscreen polymers as microparticles. The polymer microparticles, once imbibed with carrier compounds, change the refractive index, thus providing invisible sunscreen formulations which offer enhanced protection without adverse physiological effects.