Copper–birhodanine complex immobilized on Fe 3 O 4 nanoparticles: DFT studies and heterogeneous catalytic applications in the synthesis of propargylamines in aqueous medium

2017 ◽  
Vol 32 (3) ◽  
pp. e4120 ◽  
Author(s):  
Manuchehr Rezaei ◽  
Khaled Azizi ◽  
Kamal Amani
Keyword(s):  
Aqueous Medium ◽  
Dft Studies ◽  
Heterogeneous Catalytic ◽  
Catalytic Applications

scholarly journals Selective Colorimetric Sensors for Cyanide and Acetate Ion in Partially Aqueous Medium

2018 ◽  
Author(s):  
Divya Singhal ◽  
Neha Gupta ◽  
Ashok Kumar Singh
Keyword(s):  
Detection Limit ◽  
Aqueous Medium ◽  
1H Nmr ◽  
Binding Constant ◽  
High Selectivity ◽  
Good Sensitivity ◽  
Dft Studies ◽  
Nmr Titration ◽  
1H Nmr Titration ◽  
Nanomolar Detection

4-(thiazol-2-yldiazenyl)phenol (L1) and 2-((4-hydroxyphenyl) diazenyl)-5-nitrophenol (L2) based on azo phenol were synthesised and used as selective colorimetric sensor for CN- and AcO− ion in DMSO/H2O-HEPES (v/v; 1:1, pH–7.3 ± 0.2) and showed good sensitivity with large red shifts and nanomolar detection limit for CN- and AcO- ion. The stoichiometry of L1 with CN−/AcO− ion was found to be 1:1 and L2 with CN−/AcO− ion was found to be 1:2. Binding constant for L1+ CN−, L1 + AcO−, L2 + CN− and L2 + AcO− were calculated by B-H plot as 1.6 × 103, 8.0 × 102, 8.4 × 103 and 1.7 × 102 respectively. L2 showed high selectivity towards CN− ion with low detection limit of 81 nM and large binding constant. In addition, 1H NMR titration and DFT studies also supported the deprotonation mechanism of receptors in the presence of selective anions.

scholarly journals COSMO-RS and DFT studies on development and optimization of quercetin as a chemosensor for Fe3+ recognition in aqueous medium

2019 ◽  
Vol 1184 ◽  
pp. 538-545 ◽  
Author(s):  
Erna Normaya ◽  
Muhammad Fazli ◽  
Mohammad Norazmi Ahmad ◽  
Ku Halim Ku Bulat
Keyword(s):  
Aqueous Medium ◽  
Dft Studies

A highly selective and sensitive turn-on fluorescence chemosensor based on a rhodamine–adenine conjugate for Al 3+ in aqueous medium: Bioimaging and DFT studies

2016 ◽  
Vol 169 ◽  
pp. 334-341 ◽  
Author(s):  
Sunanda Sahana ◽  
Sucharita Bose ◽  
Subhra K. Mukhopadhyay ◽  
Parimal K. Bharadwaj
Keyword(s):  
Aqueous Medium ◽  
Dft Studies ◽  
Turn On

Copper Aluminate Spinel in Click Chemistry: An Efficient Heterogeneous Nanocatalyst for the Highly Regioselective Synthesis of Triazoles in Water

Synlett ◽  
2019 ◽  
Vol 30 (19) ◽  
pp. 2136-2142 ◽  
Author(s):  
Dariush Khalili ◽  
Leila Kavoosi ◽  
Ali Khalafi-Nezhad
Keyword(s):  
Aqueous Medium ◽  
Click Reaction ◽  
One Pot ◽  
Organic Azides ◽  
Heterogeneous Catalytic ◽  
Heterogeneous Catalytic System ◽  
Simple Filtration ◽  
Copper Aluminate ◽  
The One

An expeditious protocol for the one-pot synthesis of 1,4-disubstituted (β-hydroxy)-1,2,3-triazoles in an aqueous medium has been developed using copper aluminate nanoparticles. This heterogeneous catalytic system was found to drive a multicomponent click reaction between organic azides (generated in situ from epoxides or halides) and terminal aliphatic or aromatic alkynes in up to 96% yield without the need for a reducing agent. Structurally diverse 1,2,3-triazoles were synthesized in good to excellent yields, and the catalyst could be easily separated by simple filtration, recycled, and reused in six subsequent cycles.

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