Novel bis-calix[4]arene based molecular probe for ferric iron through colorimetric, ratiometric, and fluorescence enhancement response
摘要:
A new bis-calix[4]arene platform (4) formed by upper rim upper rim linking of two calixarene units has been obtained by 1:1 condensation of diformyl calixarene with carbohydrazide. The synthesized bis-calixarene has been found to selectively sense Fe3+, without interference from ferrous or any other metal ion through enhancement in the fluorescence intensity as well as ratiometric absorption changes accompanied by a color change. The importance of a bridged macro cyclic framework has been further highlighted by comparison with an acyclic reference compound. (C) 2014 Elsevier Ltd. All rights reserved.
A calix[4]arene based molecular probe, 4, has been proposed as a diagnostic probe for CN− ions in aqueous media. The investigation promises the development of disposable filter paper strips for field applications.
Design, synthesis and evaluation of a new calix[4]arene based molecular receptor for multiple ion selectivity
作者:Har Mohindra Chawla、Tanu Gupta
DOI:10.1007/s10847-014-0432-4
日期:2015.2
The hydrophobic and conformational motifs of calix[4]arene stereostructure and plausible binding characteristics of heterocyclic 2-oxo-1,2-dihydroquinoline-4-carbohydrazide have been deployed for the design and synthesis of a new molecular receptor, 4 for multi-ion recognition. The target molecule was synthesized through the condensation of 3 with 2-oxo-1,2-dihydroquinoline-4-carbohydrazide (6) in
Calix[4]arene based neutral receptor for dihydrogen phosphate anion
作者:Har Mohindra Chawla、Suneel Pratap Singh
DOI:10.1016/j.tet.2007.11.010
日期:2008.1
A series of novel calix[4]arene hydrazone and semicarbazone based neutralreceptors have been synthesized and characterized by IR, UV–vis, and NMR spectroscopies. The preliminary UV–vis and 1H NMR titration experiments revealed that 25,26,27,28-tetrapropoxycalix[4]arene tetra-semicarbazone can recognize H2PO4− through a 1:1 binding-stoichiometry in preference over other anions (Cl−, Br−, I−, HSO4−
合成了一系列新颖的杯[4]芳烃和半脲基中性受体,并通过红外,紫外-可见和核磁共振谱进行了表征。初步UV-vis和1个1 H NMR滴定实验揭示,25,26,27,28-tetrapropoxycalix [4]芳烃四缩氨基脲可以识别ħ 2 PO 4 -通过1:优先于其它阴离子1结合化学计量(氯- ,溴- ,我-,HSO 4 -,CLO 4 - ,和CH 3 COO - )。
Sensitive recognition of cyanide through supramolecularly complexed new calix[4]arenes
作者:Har Mohindra Chawla、Richa Shukla、Preeti Goel
DOI:10.1039/c4nj00065j
日期:——
A calix[4]arene based multiion fluorescent probe for copper and cyanide.
一种基于杯芳烃的多离子荧光探针,用于铜和氰离子的检测。
New chromogenic bis(isatin hydrazonyl)calix[4]arenes for dual recognition of fluoride and silver ions
作者:Har Mohindra Chawla、Tanu Gupta
DOI:10.1016/j.tetlet.2013.01.038
日期:2013.4
New calixarene based dual chromogenic receptors bearing isatin hydrazone units have been synthesized and evaluated for their ion recognition potential. The synthesized molecular receptors can effectively and selectively recognize fluoride and silver ions through visible color changes and pronounced bathochromic shifts in their UV-visible spectra. NMR titration data further support the preliminary conclusions. (C) 2013 Elsevier Ltd. All rights reserved.