A novel compound, (5-(dimethylamino)-N-(4-ethynylphenyl)-1-naphthalenesulfonamide), was prepared and characterized; it shows dual functional roles as an effective antitumor and a two-photon induced bio-imaging agent.
Fluorescence modulation in anion sensing by introducing intramolecular H-bonding interactions in host–guest adducts
作者:Yun Mi Chung、Balamurali Raman、Dae-Sik Kim、Kyo Han Ahn
DOI:10.1039/b510795d
日期:——
Fluorescence signaling in anion binding is modulated from quenching to enhancement by intramolecular H-bonding stabilization of anionâionophore adducts; the intramolecular H-bonding is suggested to suppress the quenching processes otherwise possible and increase the conformational rigidity of the anionic adducts, leading to fluorescence enhancement in a selective fashion towards cyanide ion, among the various anions examined.
Fluorescent Sensing and Selective Pb(II) Extraction by a Dansylamide Ion-Exchanger
作者:Konstantinos Kavallieratos、Jay M. Rosenberg、Wei-Zhong Chen、Tong Ren
DOI:10.1021/ja050296e
日期:2005.5.1
The (bis)dansylated sulfonamide 1,2-C6H4(NHSO2C10H6-5-N(CH3)2)2 (1) extracted Pb(II) selectively from water into 1,2-dichloroethane via an ion-exchange mechanism and showed fluorescence quenching upon Pb(II) extraction. The distribution ratios for metal extraction (determined by ICP-MS) for Pb(II) were 133-1410 times higher than those for other metal cations [Co(II), Ni(II), Cu(II), Zn(II), and Cd(II)] under identical conditions. Fluorescence quenching was observed upon Pb(II) extraction, which was dependent on Pb(II) concentration. The monodansylated control, C6H5NHSO2C10H6-5-N(CH3)2 (2), showed neither extraction nor quenching, indicating that the fluorescence effects are a direct result of Pb coordination to 1. The observed selectivity for Pb(II) is ascribed to the formation of a low-coordinate binary Pb(II)-Sulfonamido complex in the organic phase.
KALLMAYER, H. -J.;SCHWARZ, P., PHARMAZIE, 44,(1989) N, C. 119-123