A Novel Diketopyrrolopyrrole (DPP)-Based [2]Rotaxane for Highly Selective Optical Sensing of Fluoride
摘要:
A novel [2]rotaxane based on an orthogonal H-bonded motif and 3,6-di(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (DPP) with controlled topicity was successfully constructed, displaying excellent stimulated responses toward anion and solvent polarity. The preorganized host selectively recognized F- with high optical sensitivity and reversibility via enhanced positive cooperativity and noncovalent interaction by evidence of a shorter fluorescence lifetime.
机械联锁的宿主轮烷是通过在车轴中掺入四苯基乙烯和菲并咪唑单元而合成的,显示出显着的发射带,并通过其拓扑受限的腔展示了宿主与客体之间的相互作用,从而诱导轮烷向铁离子的显着且选择性的荧光猝灭( Fe 3+)。研究了轮状烷与铁离子(Fe 3+)和生物分子血红素(含铁离子)的猝灭效率,以比较轮烷对铁离子和生物分子血红素的敏感性。本研究可以探测轮烷与三价铁离子(Fe 3+)和Hemin,并监控在抗坏血酸钠(作为还原剂)存在下Hemin向Heme的生物转化,其中还原的无毒Heme可以由Hemin的有毒形式产生。
Redox responsive Pd(<scp>ii</scp>) templated rotaxane nanovalve capped mesoporous silica nanoparticles: a folic acid mediated biocompatible cancer-targeted drug delivery system
作者:Srivardhan Reddy Gayam、Shu-Pao Wu
DOI:10.1039/c4tb01030b
日期:——
Herein, redox responsive Pd(ii) templated rotaxane nanovalve capped mesoporous silica nanoparticles were designed for an effective cancer-targeted drug delivering system.