A Series of Polyamide Receptor Based PET Fluorescent Sensor Molecules: Positively Cooperative Hg2+ Ion Binding with High Sensitivity
摘要:
A series of PET fluorescent sensor molecules were designed and synthesized based on BODIPY fluorophore and polyamide receptors. Comparison of the photophysical properties of these sensor molecules, equipped with di-, tri-, and tetraamide receptor, provided a deep insight into the polyamide-Hg2+ interactions, and an unusual positively cooperative tetraamide-Hg2+ complexation was disclosed. In addition, sensor S3 displayed several favorable sensing properties.
Colorimetric Probes Based on Anthraimidazolediones for Selective Sensing of Fluoride and Cyanide Ion via Intramolecular Charge Transfer
作者:Namita Kumari、Satadru Jha、Santanu Bhattacharya
DOI:10.1021/jo201290a
日期:2011.10.21
designed and synthesized for selective ion sensing. Each probe acted as strong colorimetric sensors for fluoride and cyanideions and exhibited intramolecular charge transfer (ICT) band, which showed significant red-shifts after addition of either the F– or CN– ion. One of the probes (2) showed selective colorimetric sensing for both cyanide and fluoride ions. In organic medium, 2 showed selective
设计并合成了基于蒽[1,2 - d ]咪唑-6,11-二酮的探针,用于选择性离子感测。每个探针充当氟化物和氰化物离子并显示出分子内电荷转移(ICT)带强比色传感器,这表明添加的任一在F后显著红移-或CN -离子。探针之一(2)对氰化物和氟离子均显示选择性比色传感。在有机介质中,2显示出氟化物和氰化物的选择性颜色变化,而在水性有机介质中,它对氰化物离子显示出选择性的比例响应。
Real-time noninvasive monitoring of cell mortality using a two-photon emissive probe based on quaternary ammonium
We report that a dicyanyl derivative QN2 containing quaternary ammonium was capable of identifying apoptotic cells by targeting nucleic acid (DNA and RNA).
Two novel fluorescent Zn2+ chemosensors were synthesized in four steps from inexpensive starting materials. They exhibited very strong fluorescence responses to Zn2+ and had remarkably high selectivity to Zn2+ than other metal ions including Mg2+, Ca2+, Ni2+, Cu2+, and Cd2+. These two new molecules could be used as low-priced yet high-quality Zn2+ chemosensors.
A simple and universal strategy by tuning halides (Cl, Br and I) in terpyridine–Zn(ii) complexes to achieve different subcellular organelle targeting via different cellular uptake mechanisms was reported.