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Iodide recognition by the N,N-bis-succinamide-based dendritic molecule [CH(2)C(O)NHC(CH(2)CH(2)C(O)OtBu)(3)](2)

DSpace at IIT Bombay

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Title Iodide recognition by the N,N-bis-succinamide-based dendritic molecule [CH(2)C(O)NHC(CH(2)CH(2)C(O)OtBu)(3)](2)
 
Creator CHANDRA, S
LOKESH, KS
LANG, H
 
Subject ion-selective electrodes
pvc membrane-electrode
potentiometric selectivity
technical report
schiff-base
complex
phosphate
carrier
ionophore
sensors
amide dendrimer
iodide selective electrode
ionophores
anion recognition
 
Description Ion selective membrane electrode doped with amide functionalized dendritic [CH(2)C(O)NHC(CH(2)CH(2)C(O)OtBu)(3)](2) macromolecule was evaluated as anion sensor. The ability of the membrane has been explored by incorporating it into a plasticized PVC matrix on glassy carbon electrode. The effects of membrane composition, pH and the influence of anion additives, and also the nature of the plasticizers on the response characteristics of the electrode were investigated. The resulting electrode exhibits an anti-Hofmeister selectivity pattern with remarkable specificity towards iodide over other lipophilic inorganic anions. The optimum membrane composition for best potentiometric performance was achieved with a DPE-plasticized membrane (DPE=diphenyl ether) doped with 15%TBAB (TBAB = tetrabutyl ammonium bromide), suggesting that the ionophore operates via a neutral carrier mechanism. It has a linear response to iodide with a detection limit of 4.46 x 10(-7) M and a slope of 59.6 mV/decade, a satisfactory reproducibility and a rapid response time. The selectivity coefficients for I(-) towards interferences from ClO(4)(-), NO(3)(-) and Cl(-) were estimated to be K(Ranion)(pot) = 1.25 x 10(-4), 1.99 x 10(-4) and 7.94 x 10(-5), respectively. Application of the electrode to the potentiometric titration of iodide ion with silver nitrate is also reported. (C) 2008
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-28T10:31:05Z
2011-12-26T12:59:03Z
2011-12-27T05:49:55Z
2011-07-28T10:31:05Z
2011-12-26T12:59:03Z
2011-12-27T05:49:55Z
2009
 
Type Article
 
Identifier SENSORS AND ACTUATORS B-CHEMICAL, 137(1), 350-356
0925-4005
http://dx.doi.org/10.1016/j.snb.2008.12.013
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7378
http://hdl.handle.net/10054/7378
 
Language en