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Nanosized CuO Particles via a Supramolecular Strategy
Premkumar, T.,Geckeler, K. ,E. WILEY-VCH Verlag 2006 Small Vol.2 No.5
<B>Graphic Abstract</B> <P>Uniform cupric oxide nanoparticles have been prepared for the first time via a novel supramolecular complex (see image, left) by thermal decomposition, in which cucurbit[7]uril was selected to encapsulate copper acetate, which acts as the precursor for the CuO nanoparticles (right). The procedure affords particles with a narrow size distribution and of very small diameter (≈5 nm). <img src='wiley_img/16136810-2006-2-5-SMLL200500454-content.gif' alt='wiley_img/16136810-2006-2-5-SMLL200500454-content'> </P>
Choi, S. J.,Geckeler, K. E. Wiley Subscription Services, Inc., A Wiley Company 2007 Journal of applied polymer science Vol.103 No.5
<P>The synthesis and characterization of poly(ethylenediaminetetraacetic acid-co-lactose) of high molar mass (132 kg mol<SUP>−1</SUP>) is described. The polycondensate with pendant carboxylic groups was shown to be hydrolytically and microbiologically degradable by using conventional microbiological methods. The metal complexing properties of the polyester were studied for Cr(III), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Sr(II), Cd(II), Pb(II), and Al(III) ions in aqueous solution using the liquid-phase polymer-based retention (LPR) method. In addition, the complexing capacity of the Cu(II)-saturated copolymer was determined by TGA to be 182 mg g<SUP>−1</SUP> polymer. According to the retention profiles determined as a function of filtration factor by using LPR in conjunction with inductively coupled plasma spectrometry, Cr(III) and Fe(III) showed a strong interaction with this polymer under these conditions, indicated by retention values of 100% at pH 5. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 2932–2939, 2007</P>
Synthetic Approaches for the Nanoencapsulation of Fullerenes
Murthy, C. N.,Geckeler, K. E. WILEY-VCH Verlag 2006 Chem Inform Vol.37 No.41
<P>ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.</P>
Choi, S. J.,Geckeler, K. E. Wiley Subscription Services, Inc., A Wiley Company 2003 Journal of applied polymer science Vol.90 No.3
<P>The synthesis and characterization of poly(ethylenediaminetetraacetic acid-co-lactose) with pendant carboxylic groups of high molar mass (132 kg mol<SUP>−1</SUP>) is described. The polycondensate was hydrolytically and microbiologically degradable with conventional microbiological methods. The metal-complexing properties of the polyester were studied for Cr(III), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Sr(II), Cd(II), Pb(II), and Al(III) ions in aqueous solution with the liquid-phase polymer-based retention (LPR) method. In addition, the complexing capacity of the Cu(II)-saturated copolymer was determined by thermogravimetric analysis to be 182 mg g<SUP>−1</SUP> of polymer. According to the retention profiles determined as a function of the filtration factor with LPR in conjunction with inductively coupled plasma spectrometry, Cr(III) and Fe(III) showed a strong interaction with this polymer under these conditions, as indicated by retention values of about 100% at pH 5. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 650–657, 2003</P>
Poly(N-isopropylacrylamide-co-sodium acrylate) hydrogels: Interactions with surfactants
Mohan, Y. M.,Joseph, D. K.,Geckeler, K. E. Wiley Subscription Services, Inc., A Wiley Company 2007 Journal of applied polymer science Vol.103 No.5
<P>Poly(N-isopropylacrylamide-co-sodium acrylate) [poly(NIPAM-co-SA)] hydrogels were modified with three different kind of surfactants (cationic, anionic, and nonionic) to study the effect on the swelling properties. The structural variation of the surfactant-modified hydrogels was investigated in detail. The interaction between the surfactants and the hydrogel varies and strictly depends on the surfactant type. The variation in thermal stability of the modified surfactant hydrogels was investigated and compared with unmodified hydrogel. Further, the hydrogel swelling/diffusion kinetic parameters were investigated and diffusion of water into hydrogel was found to be of the non-Fickian transport mechanism. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3423–3430, 2007</P>