Hydrazine derivatives of fluorans and use thereof in electrochromic recording systems
申请人:THE HILTON - DAVIS CHEMICAL COMPANY
公开号:EP0141962A1
公开(公告)日:1985-05-22
This invention relates to spiro[isoindole-xanthene]-3- ones, spiro[phthalazine-xanthene]-4-ones, and xanthene-3- ones useful as color-forming substances, particularly in electrochromic recording systems, which are prepared by the interaction of a fluoran with a substituted or unsubstituted hydrazine.
Highly sensitive and selective turn-on fluorescent chemosensor for Pb2+ and Hg2+ based on a rhodamine–phenylurea conjugate
作者:Zhi-Qiang Hu、Cun-sheng Lin、Xiao-Ming Wang、Lei Ding、Cun-Li Cui、Shu-Feng Liu、Hai Yan Lu
DOI:10.1039/c001587c
日期:——
A novel easily available turn-onfluorescentchemosensor RPU based on a rhodamine-phenylurea conjugate was synthesized, which showed highlyselective and sensitive recognition toward Pb(2+) in CH(3)CN and Hg(2+) in aqueous media over a wide range of tested metal ions with remarkably enhanced fluorescent intensities and also clear color changes from colorless to pink.