A fluorescein-based chemosensor for “turn-on” detection of Hg<sup>2+</sup> and the resultant complex as a fluorescent sensor for S<sup>2−</sup> in semi-aqueous medium with cell-imaging application: experimental and computational studies
作者:Hasan Mohammad、Abu Saleh Musha Islam、Chandraday Prodhan、Mahammad Ali
DOI:10.1039/c8nj05418e
日期:——
between Hg2+ and S2−. The tentative coordination environment in the [Hg(HL3)]+ complex was established by DFT studies. The fluorescence “OFF–ON–OFF” mode of H2L3 was examined in the presence of Hg2+ and S2− and finds applications in devices with logic gate functions. H2L3 also exhibits bio-compatibility and negligible cytotoxicity and is suitable for fluorescence cellimaging of Hg2+ ions in live HepG2
通过将酰肼(L 1)与2-(吡啶-2-基甲氧基)-萘-1-甲醛(L 2)偶联,合成了基于荧光素的共轭物(H 2 L 3)。通过诸如IR,1 H,13 C-NMR和ESI-MS的几种光谱方法很好地表征了H 2 L 3。H 2 L 3探针对有毒的Hg 2+具有高选择性和高灵敏度半水介质(pH 7.2,10 mM HEPES)中的其他离子超过其他金属离子。集中在520nm处的荧光发射的显着增强归因于Hg 2+诱导的荧光素结构中的螺内酰胺部分的开环。通过Job方法建立H 2 L 3与Hg 2+的1:1结合,并通过ESI-MS +(m / z)研究证实,结合常数计算为(0.43±0.04)×10 4 M -1检测限为1.24μM。再一次,[Hg(HL 3)] +集成可以用作S 2-的可逆荧光传感器。在加入S的2-到[汞柱(HL 3)] +络合物,荧光强度完全猝灭因为汞2+在复合物被S抓住2-由于汞之间的更强的结合力2+和S
COMPOSITIONS AND METHODS FOR INHIBITING GROUP II INTRON RNA
申请人:YALE UNIVERSITY
公开号:US20210139512A1
公开(公告)日:2021-05-13
The present invention provides compositions and methods for inhibiting group II intron splicing for treating or preventing a disease or disorder associated with an organism harboring an active group II intron. The present invention also provides compositions and methods for inhibiting group II intron splicing for inhibiting, preventing or reducing growth of an organism harboring an active group II intron.
[EN] COMPOSITIONS AND METHODS FOR INHIBITING GROUP II INTRON RNA<br/>[FR] COMPOSITIONS ET MÉTHODES POUR INHIBER DES ARN D'INTRON DE GROUPE II
申请人:UNIV YALE
公开号:WO2019147894A1
公开(公告)日:2019-08-01
The present invention provides compositions and methods for inhibiting group II intron splicing for treating or preventing a disease or disorder associated with an organism harboring an active group II intron. The present invention also provides compositions and methods for inhibiting group II intron splicing for inhibiting, preventing or reducing growth of an organism harboring an active group II intron.