A highly sensitive “ON–OFF” optical sensor for the selective detection of cyanide ions in 100% aqueous solutions based on hydrogen bonding and water assisted aggregation induced emission

2020 ◽  
Vol 56 (63) ◽  
pp. 8992-8995
Author(s):  
Ramo Nazarian ◽  
Hossein Reza Darabi ◽  
Kioumars Aghapoor ◽  
Rohoullah Firouzi ◽  
Hani Sayahi
Keyword(s):  
Hydrogen Bonding ◽  
Aqueous Solutions ◽  
Optical Sensor ◽  
Selective Detection ◽  
Aggregation Induced Emission ◽  
Highly Sensitive

Nanoparticles N,N′-(pyridine-2,6-diyl)bis(2-(2,4-dichlorophenoxy)acetamide) (1) exhibited an “on–off” emission response toward cyanide (CN−) ions in 100% aqueous solutions based on AIE features.

scholarly journals Experimental Sensing and DFT Mechanism of Zn(II) Complex for Highly Sensitive and Selective Detection of Acetone

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 324
Author(s):  
Mohd. Muddassir ◽  
Mohammad Usman ◽  
Abdullah Alarifi ◽  
Mohd. Afzal ◽  
Khulud Abdullah Alshali ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Energy Barrier ◽  
Association Constant ◽  
Theoretical Calculations ◽  
Selective Detection ◽  
Acetone Molecule ◽  
Hydrogen Bonding Interactions ◽  
Highly Sensitive ◽  
Perchlorate Complex ◽  
Selective Sensor

In the present work, a new Zn(II) perchlorate complex with 2,2’–bipyridyl of formulation {[Zn(bipy)2(H2O)](ClO4)2} (1) was obtained and well analyzed. This chemosensor was evaluated as a selective sensor for acetone among the several different organic solvents(CH3OH, EtOH, i–PrOH, i–BuOH, CHCl3, CH2Cl2, CCl4, C6H6, C7H8, C8H10, C2H3N, C3H7NO, C4H8O2, C3H6O3) in a fluorescence turn–off response in accordance with theoretical calculations. Sensing experiments were performed at ambient temperature which shows the acetone molecule distinctly reduces transfer of energy barrier to complex 1 and hence, produces remarkable luminescent quenching. Also, the weak intermolecular hydrogen–bonding interactions thanks to the presence of various hydrogen bonding donors and acceptors, exist between ligand molecules, which were broken during fluorescence, resulting in quenching. The stoichiometry ratio and association constant were evaluated using Benesi–Hildebrand relation giving 1:1 stoichiometry between complex 1 and acetone. Additionally, DFT results can also explicate the significant response on complex 1 upon addition of acetone. This work is vital in a new loom for the detection of acetone and other ketones.

A cationic iridium(iii) complex with aggregation-induced emission (AIE) properties for highly selective detection of explosives

2014 ◽  
Vol 50 (45) ◽  
pp. 6031-6034 ◽  
Author(s):  
Xue-Gang Hou ◽  
Yong Wu ◽  
Hong-Tao Cao ◽  
Hai-Zhu Sun ◽  
Hai-Bin Li ◽  
...  
Keyword(s):  
Selective Detection ◽  
Aggregation Induced Emission ◽  
Highly Sensitive ◽  
Detection Of Explosives

A new AIE-active cationic Ir(iii) complex has been designed and synthesized, which exhibits highly sensitive and selective detection of explosives (TNP).

Mesoporous TiO2 based optical sensor for highly sensitive and selective detection and preconcentration of Bi(III) ions

2014 ◽  
Vol 243 ◽  
pp. 509-516 ◽  
Author(s):  
M. Faisal ◽  
Adel A. Ismail ◽  
Farid A. Harraz ◽  
Houcine Bouzid ◽  
S.A. Al-Sayari ◽  
...  
Keyword(s):  
Optical Sensor ◽  
Mesoporous Tio2 ◽  
Selective Detection ◽  
Highly Sensitive

Self-assembly of nitrogen-doped carbon nanoparticles: a new ratiometric UV-vis optical sensor for the highly sensitive and selective detection of Hg2+ in aqueous solution

The Analyst ◽  
2016 ◽  
Vol 141 (11) ◽  
pp. 3313-3318 ◽  
Author(s):  
Yudi Ruan ◽  
Lie Wu ◽  
Xiue Jiang
Keyword(s):  
Aqueous Solution ◽  
Optical Sensor ◽  
Self Assembly ◽  
Carbon Nanoparticles ◽  
The Self ◽  
Selective Detection ◽  
Nitrogen Doped ◽  
Highly Sensitive ◽  
Nitrogen Doped Carbon

A novel ratiometric UV-vis optical sensor for Hg2+ was developed based on the self-assembly of nitrogen-doped carbon nanoparticles.

Highly sensitive colorimetric detection of HgII and CuII in aqueous solutions: from amino acids toward solid platforms

The Analyst ◽  
2015 ◽  
Vol 140 (3) ◽  
pp. 744-749 ◽  
Author(s):  
Jooyoung Park ◽  
Byunggyu In ◽  
Lok Nath Neupane ◽  
Keun-Hyeung Lee
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Colorimetric Detection ◽  
Selective Detection ◽  
Highly Sensitive ◽  
Fluorescence Change

A chemosensor (NBD-H) based on an amino acid with 7-nitro-2,1,3-benzoxadiazole was used for selective detection of HgII and CuII among 15 metal ions in aqueous solutions by a colorimetric change and fluorescence change.

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