Combining the PeT and ICT mechanisms into one chemosensor for the highly sensitive and selective detection of zinc
作者:Ting Wei、Jinglu Wang、Yu Chen、Yifeng Han
DOI:10.1039/c5ra11194c
日期:——
A novel fluorescent sensor (ZS1) based on the dual-mechanism of PeT/ICT for the highly sensitive and selective detection of Zn2+ was designed and synthesized. ZS1 displays remarkable selectivity for Zn2+ with an enhanced red-shift in both absorption and emission, which results from the Zn2+-triggered deprotonation of its amide group. ZS1 could detect as low as 7.2 × 10−9 M Zn2+ with an association
设计并合成了一种基于PeT / ICT双重机理的新型荧光传感器(ZS1),用于Zn 2+的高灵敏度和选择性检测。ZS1对Zn 2+显示出显着的选择性,吸收和发射的红移均增强,这是由于Zn 2+触发了酰胺基的去质子作用。ZS1可以检测到低至7.2×10 -9 M Zn 2+,其缔合常数值为6.27×10 4 M -1。更重要的是,它显示出对Zn 2+的特异性和灵敏识别,尤其是避免了Cd的干扰。2+在水溶液中。还证明该探针可检测活细胞中的Zn 2+。
The synthesis and fluorescence of novel
<i>N</i>
‐substituted‐1,8‐naphthylimides
作者:Dongwu Yuan、Robert G Brown、John D Hepworth、Michael S Alexiou、John H. P. Tyman
DOI:10.1002/jhet.5570450216
日期:2008.3
Abstractmagnified imageThe synthesis and characterisation of a series of novel 4‐acylamino and 4‐alkylamino‐N‐1,8‐naphthalimides is described. The UV‐visible absorption and emission properties of the compounds are reported. Significant solvent effects are noted for 4‐n‐butyl‐9‐n‐butyl‐1,8‐naphthylimide. The incorporation of acetyl and chloroacetyl groups into the 4‐substituent markedly increases the fluorescence quantum yield compared with 4‐alkylamino substituemnts.
Zn<sup>2+</sup>-Triggered Amide Tautomerization Produces a Highly Zn<sup>2+</sup>-Selective, Cell-Permeable, and Ratiometric Fluorescent Sensor
作者:Zhaochao Xu、Kyung-Hwa Baek、Ha Na Kim、Jingnan Cui、Xuhong Qian、David R. Spring、Injae Shin、Juyoung Yoon
DOI:10.1021/ja907334j
日期:2010.1.20
It is still a significant challenge to develop a Zn2+-selective fluorescent sensor with the ability to exclude the interference of some heavy and transition metal (HTM) ions such as Fe2+, Co2+, Ni2+, Cu2+, Cd2+, and Hg2+. Herein, we report a novel amide-containing receptor for Zn2+, combined with a naphthalimide fluorophore, termed ZTRS. The fluorescence, absorption detection, NMR, and IR studies indicated that ZTRS bound Zn2+ in an imidic acid tautomeric form of the amide/di-2-picolylamine receptor in aqueous solution, while most other HTM ions were bound to the sensor in an amide tautomeric form. Due to this differential binding mode, ZTRS showed excellent selectivity for Zn2+ over most competitive HTM ions with an enhanced fluorescence (22-fold) as well as a red-shift in emission from 483 to 514 nm. Interestingly, the ZTRS/Cd2+ complex showed an enhanced (21-fold) blue-shift in emission from 483 to 446 nm. Therefore, ZTRS discriminated in vitro and in vivo Zn2+ and Cd2+ with green and blue fluorescence, respectively. Due to the stronger affinity, Zn2+ could be ratiometrically detected in vitro and in vivo with a large emission wavelength shift from 446 to 514 nm via a Cd2+ displacement approach. ZTRS was also successfully used to image intracellular Zn2+ ions in the presence of iron ions. Finally, we applied ZTRS to detect zinc ions during the development of living zebrafish embryos.