Optical explosives detection: from color changes to fluorescence turn-on

2009 ◽  
Vol 38 (9) ◽  
pp. 2543 ◽  
Author(s):  
Meaghan E. Germain ◽  
Michael J. Knapp
RSC Advances ◽  
2014 ◽  
Vol 4 (100) ◽  
pp. 56863-56869 ◽  
Author(s):  
Zheng Liu ◽  
Yuhua Qi ◽  
Chaoxia Guo ◽  
Yingying Zhao ◽  
Xiaofeng Yang ◽  
...  

(1) Two new fluorescent sensors were developed based on benzimidazo[2,1-a]benz[de]isoquinoline-7-one. (2) BothC1andC2showed fluorescence turn-on response toward Cu2+in buffer solutions. (3) The detection limit of C1 towards Cu2+reached 5.7 × 10−8M. (4) The Cu2+sensing ofC1andC2were both based on the PET process. (5) Addition of OH−could lead to significantly color changes ofC1solution.


2018 ◽  
Author(s):  
Suying Xu ◽  
Adam Sedgwick ◽  
Souad Elfecky ◽  
Wenbo Chen ◽  
Ashley Jones ◽  
...  

<p>A boronic acid-based anthracene fluorescent probe was functionalised with an acrylamide unit to incorporate into a hydrogel system for monosaccharide detection<i>. </i>In solution, the fluorescent probe<b> </b>displayed a strong fluorescence turn-on response upon exposure to fructose, and an expected trend in apparent binding constants, as judged by a fluorescence response where D-fructose > D-galactose > D-mannose > D-glucose. The hydrogel incorporating the boronic acid monomer demonstrated the ability to detect monosaccharides by fluorescence with the same overall trend as the monomer in solution with the addition of fructose resulting in a 10-fold enhancement (≤ 0.25 M). <b><u></u></b></p>


2019 ◽  
Vol 91 (15) ◽  
pp. 10095-10101 ◽  
Author(s):  
Palanisamy Ravichandiran ◽  
Sivakumar Allur Subramaniyan ◽  
Antony Paulraj Bella ◽  
Princy Merlin Johnson ◽  
Ae Rhan Kim ◽  
...  

2021 ◽  
Author(s):  
Akifumi Sumida ◽  
Hiroaki Imoto ◽  
Kensuke Naka

The development of turn-on detection sensors for methanol vapor remains challenging in material science. Methanol sensing materials are generally based on vapor-triggered color changes or are turn-off types. Additionally, in...


2020 ◽  
Vol 22 (23) ◽  
pp. 13306-13319
Author(s):  
Mhejabeen Sayed ◽  
Dona M. Tom ◽  
Haridas Pal

Pictorial presentation of the different aspects as displayed by the AOH+–SCXn systems in regard to multi-mode binding, dynamic quenching and stimuli responsive fluorescence “turn ON”, demonstrating very rich supramolecular photochemistry.


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