Selective Manipulation of ICT and PET Processes in Styryl-Bodipy Derivatives: Applications in Molecular Logic and Fluorescence Sensing of Metal Ions
摘要:
Remarkably versatile chemistry of Bodipy dyes allows the design and straightforward synthesis of multivalent-multitopic derivatives, which, with judicious selection of metal ion ligand pairs based on known affinities, affords control and manipulation of photoinduced electron transfer and internal charge transfer processes as desired. We have demonstrated that metal ions acting as modulators (or inputs, in digital design parlance) can generate absorbance changes in accordance with the operation of a half-adder. In addition, an AND logic gate in the emission mode was delivered using a different binucleating arrangement of ligands. A molecular equivalent of a three-input AND logic gate was also obtained exploiting differential binding affinities of metal ions for different ligands. The results suggest that different metal ions can be used as nonannihilating inputs, selectively targeting various ligands incorporated within a single fluorophore, and with careful design, diverse photophysical processes can be selectively modulated, resulting in a range of signals, useful in molecular logic design, and offering an enticing potential for multianalyte chemosensors.
Functionalized Fe3O4 Nanoparticles for Detecting Zinc Ions in Living Cells and Their Cytotoxicity
作者:Gyusik Kang、Hyunjong Son、Jung Mi Lim、Hee-Seek Kweon、In Su Lee、Dongmin Kang、Jong Hwa Jung
DOI:10.1002/chem.201200294
日期:2012.5.7
The zinc tank: A new fluoro‐chromogenic chemosensor based on BODIPY‐functionalizedFe3O4nanoparticles (1) has been prepared. Chemoprobe 1 exhibits high selectivity for Zn2+ over other competing metal ions tested. Moreover, confocal microscopy experiments established that 1 can be used for detecting Zn2+ levels in livingcells (see figure).
锌罐:基于BODIPY功能化的Fe 3 O 4纳米颗粒(1)的新型荧光显色化学传感器已经制备。化学探针1对Zn 2+的选择性比其他竞争性金属离子高。此外,共聚焦显微镜实验确定1可用于检测活细胞中的Zn 2+水平(见图)。