Journal
CHEMICAL ENGINEERING JOURNAL
Volume 220, Issue -, Pages 420-430Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2013.01.037
Keywords
Diazo; Schiff base; Imine; Solid phase extraction; Preconcentration; Silica gel
Categories
Funding
- Scientific & Technological Research Council of Turkey (TUBITAK) [111T211]
Ask authors/readers for more resources
Novel multidentate silica-supported bis(diazoimine) ligands were synthesized and characterized by elemental analysis, solid phase NMR (Si-29 and C-13 CP MAS), FT-IR, TG/DTA, SEM and EDX techniques. In the synthesis, diazotized electrophiles of 1,4-diaminobenzene and 1,3-diaminobenzene coupled with 2,4-dihydroxybenzaldehyde to give bis(diazocarbonyl) compounds; (A(1): 5,5'-(1,4-phenylenebis(diazene-2,1-diyl))bis(2,4-dihydroxybenzaldehyde and A(2): 5,5'-1,3-phenylenebis(diazene-2,1-dil))bis(2,4-dihydroxybenzaldehyde)) which were chemically supported with amino-modified silica-gel (L1 and L2). The electrochemical properties of bis(diazocarbonyl) compounds (A1 and A2) were investigated by cyclic voltammetry. Optimum solid phase extraction parameters of the synthesized sorbents for syringe and batch techniques were determined by using ICP-OES. At optimum conditions, the recoveries of Pb(II), Cu(II), Cd(II) and Cr(III) were 95-99% +/- 2-3%. All the multifunctional multidentate silica-supported ligands showed highly effective solid phase extraction properties. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available