2931-90-0Relevant articles and documents
A Dual Colorimetric/Fluorescence System for Determining pH Based on the Nucleophilic Addition Reaction of an o-Hydroxymerocyanine Dye
Yue, Yongkang,Huo, Fangjun,Lee, Songyi,Yin, Caixia,Yoon, Juyoung,Chao, Jianbin,Zhang, Yongbin,Cheng, Fangqin
, p. 1239 - 1243 (2016)
Owing to their ability to monitor pH in a precise and rapid manner, optical probes have widely been developed for biological and nonbiological applications. The strategies thus far employed to determine pH rely on two types of processes including reversible protonation of amine nitrogen atoms and deprotonation of phenols. We have developed a novel dual, colorimetric/fluorescence system for determining the pH of a solution. This system utilizes an o-hydroxymerocyanine dye that undergoes a nucleophilic addition reaction that subsequently causes reversible structural changes interconverting a merocyanine to a spirocyanine and a spirocyanine to a spiropyran. It was demonstrated that the dye can be employed to measure the pH of solutions in the 2.5-5.75 and 9.6-11.8 ranges with color changes from yellow to dark blue and then to lavender. Moreover, the fluorescence response associated with the spirocyanine-spiropyran transformation of the dye occurring in alkaline solutions provides a precise method. Strike that, reverse it! A novel dual, colorimetric/fluorescence system for determining the pH of a solution has been developed. This system utilizes an o-hydroxymerocyanine dye, which undergoes a nucleophilic addition reaction that subsequently causes reversible structural changes interconverting a merocyanine to a spirocyanine and a spirocyanine to a spiropyran (see scheme).
An ICT based ultraselective and sensitive fluorescent probe for detection of HClO in living cells
Yue, Yongkang,Huo, Fangjun,Yin, Caixia,Chao, Jianbin,Zhang, Yongbin,Wei, Xing
, p. 77670 - 77672 (2015)
An ICT based ultraselective and sensitive probe for colorimetric and fluorescent detection of HClO via oxidative cleavage of an alkene linker to epoxide and then to aldehydes was developed through the conjugation of pyridinium with vanilline.
Synthesis of salicylaldehydes from phenols via copper-mediated duff reaction
Fu, Xue-Wen,Pu, Wen-Chen,Zhang, Guo-Lin,Wang, Chun
, p. 8147 - 8158 (2015/02/19)
A copper-mediated Duff reaction for ortho-selective formylation of phenols has been developed. In the presence of copper species, significant improvements of yield and ortho-selectivity of the Duff formylation were achieved, which provides an easy access to salicylaldehydes from phenols.
