作者:Wen Hui Hao、Pengfei Yan、Guangming Li、Zhi Yuan Wang
DOI:10.1016/j.dyepig.2014.06.005
日期:2014.12
A new class of short-conjugated zwitterionic cyanopyridinium chromophores with the absorption maxima less than 550 nm were designed and synthesized. These chromophores display a good solubility in organic solvents and exist in a charge-separated ground state, as confirmed by IR, X-ray crystallography, negative solvatochromism and fluorescence studies. They can be doped up to 10% by weight into poly(ether
A polydiacetylene-based colorimetric chemosensor for malondialdehyde detection: a food spoilage indicator
作者:Sangwan Kim、Sunjong Lee、Yejin Ahn、Hyun Ki Kim、Joonseok Koh、Sung Dong Kim、Bong-Gi Kim
DOI:10.1039/c7tc02311a
日期:——
preparation. In addition, it was verified that the devised MDA chemosensor selectively responded to the divalent MDA, ratherthan the monovalent butanal. The detection limit of the optimized MDA chemosensor was about 250 μM in solution, but when a film-type MDA chemosensor was fabricated through the accumulation of the liposomes on top of a nylon membrane and then applied, the detection limit improved dramatically
Structure–Property Relationships of Polyethylene Glycol Modified Fluorophore as Near-Infrared Aβ Imaging Probes
作者:Kaixiang Zhou、Yuying Li、Yi Peng、Xiaomei Cui、Jiapei Dai、Mengchao Cui
DOI:10.1021/acs.analchem.8b01712
日期:2018.7.17
To optimize the lipophilicity and improve in vivo pharmacokinetics of near-infrared probes targeted Aβ plaques, we designed, synthesized, and evaluated a series of polyethylene glycol modified probes with hydroxyl and methoxyl terminals. The relationships between chemical structure and optical, biological properties were systemically elucidated. The results indicated that a desired Aβ probe should keep a balance among molecular rigidity, size, and lipophilicity. Probe 12d displayed improved properties including intense and selective response to Aβ1–42 aggregates (Kd = 7.3 nM, 22-fold fluorescence enhancement and emission maxima at 715 nm upon interaction with Aβ1–42 aggregates), sufficient blood–brain barrier penetration (3.04% ID/g), and fast wash out from the brain (brain2 min/brain60 min = 10.1). Clear fluorescence signals retention in transgenic mice than control mice in in vivo near-infrared imaging. Hence, polyethylene glycol modified probes retained favorable optical properties but displayed great improvement of biological properties for Aβ detection.
A dual-ratiometric fluorescent probe for individual and continuous detection of H<sub>2</sub>S and HClO in living cells
作者:Xiuxiu Yue、Jingpei Wang、Jinliang Han、Benhua Wang、Xiangzhi Song
DOI:10.1039/c9cc10028h
日期:——
A dual-ratiometric fluorescent probe, Han-HClO-H2S, was developed for the individual and continuous detection of H2S and HClO with high sensitivity and good selectivity, and had been applied to detect intracellular H2S and/or HClO in living cells.