fluorescent probe
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2022 ◽  
Vol 199 ◽  
pp. 110057
Author(s):  
Tingting Zhu ◽  
Yan Hu ◽  
Xi Chen ◽  
Haibing Shao ◽  
Zhihua Chen ◽  
...  
Keyword(s):  

Author(s):  
Sheng Wang ◽  
Yu Zhang ◽  
Tian-Ran Wang ◽  
Yu-Jun Liu ◽  
Shi-Li Shen ◽  
...  

2022 ◽  
Vol 198 ◽  
pp. 110004
Author(s):  
Yu Chen ◽  
Wanqi Mo ◽  
Zhiyong Cheng ◽  
Fanwei Kong ◽  
Chunxia Chen ◽  
...  

2022 ◽  
Vol 423 ◽  
pp. 127179
Author(s):  
Xia Zhang ◽  
Li Zhang ◽  
Shudi Liu ◽  
Xiaozhen Zhu ◽  
Panpan Zhou ◽  
...  

2022 ◽  
Vol 353 ◽  
pp. 131178
Author(s):  
Mingzhu Zhang ◽  
Yu Shen ◽  
Xu Cheng ◽  
Longyu Yang ◽  
Hu Li ◽  
...  

2022 ◽  
Vol 198 ◽  
pp. 110014
Author(s):  
Qiushuo Huang ◽  
Tiantian Liu ◽  
Danyang Ma ◽  
Junxia Liu ◽  
Tiegang Ren ◽  
...  

Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 516
Author(s):  
You Qian ◽  
Fuchun Gong ◽  
Jiguang Li ◽  
Pan Ma ◽  
Hanming Zhu ◽  
...  

Constructing excited-state intermolecular proton transfer (ESIPT-e) fluorophores represents significant challenges due to the harsh requirement of bearing a proton donor-acceptor (D-A) system and their matching proton donating-accepting ability in the same molecule. Herein, we synthesized a new-type ESIPT-e fluorophor (2-APC) using the “four-component one-pot” reaction. By the installing of a cyano-group on pyridine scaffold, the proton donating ability of -NH2 was greatly enhanced, enabling 2-APC to undergo ESIPT-e process. Surprisingly, 2-APC exhibited dual-emissions in protic solvents ethanol and normal fluorescence in aprotic solvents, which is vastly different from that of conventional ESIPT-a dyes. The ESIPT emission can be obviously suppressed by Fe3+ due to the coordination reaction of Fe3+ with the A-D system in 2-APC. From this basis, a highly sensitive and selective method was established using 2-APC as a fluorescent probe, which offers the sensitive detection of Fe3+ ranging from 0 to 13 μM with the detection limit of 7.5 nM. The recovery study of spiked Fe3+ measured by the probe showed satisfactory results (97.2103.4%) with the reasonable RSD ranging from 3.1 to 3.8%. Moreover, 2-APC can also exhibit aggregation-induced effect in poor solvent or solid-state, eliciting strong red fluorescence. 2-APC was also applied to cell-imaging, exhibiting good cell-permeability, biocompatibility and color rendering. This multi-mode emission of 2-APC is significant departure from that of conventional extended p-conjugated systems and ESIPT dyes based on a flat and rigid molecular design. The “one-pot synthesis” strategy for the construction of ESIPT molecules pioneered a new route to achieve tricolor-emissive fluorophores.


Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 489
Author(s):  
Xin Guo ◽  
Chang-Xiang Liu ◽  
Yuan Lu ◽  
Ya-Wen Wang ◽  
Yu Peng

A novel two-site chemodosimeter (SWJT-4) based on fluorescein skeleton to detect diethyl chlorophosphate (DCP) was designed and synthesized. It is a turn-on fluorescent probe for DCP with good selectivity and obvious color change in aqueous solution. Interestingly, the two oxime groups of SWJT-4 as dual response sites initiated different reactions with DCP to form a cyano group and an isoxazole ring, respectively. The corresponding mechanism was confirmed by 1H NMR, MS and DFT calculation. Moreover, SWJT-4 could be used as a fluorescent test paper to detect DCP vapor.


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