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Evaluation of antioxidant activity of aniline and polyaniline
M. Gizdavic-Nikolaidis,R. P. Cooney,J. Travas-Sejdic,P. A. Kilmartin,G. A. Bowmaker 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
The ability of aniline and polyaniline (PANI) samples to act as antioxidants using the 1,1-diphenyl-2-picrylhydrazyl (DPPH)free-radical method are investigated by applying UVVIS and ESR spectroscopy. The UVVIS spectra of reaction mixtures inMeOH showed that PANI is more eective than aniline in eliminating the DPPH radicals by a factor of 5.8, while HCl-doped PANIwas about 1.7 times more eective than PANI. A study of the kinetics of the reaction between DPPH and aniline showed that thereaction is rst order with respect to DPPH and approximately second order with respect to aniline. The relationship between thisand a previously proposed mechanism for this reaction is discussed.
Structure and properties of GPTMS/DETA and GPTMS/EDA hybrid polymers
M.R. Gizdavic-Nikolaidis,N.R. Edmonds,C.J. Bolt,A.J. Easteal 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
Silica/epoxy hybrid polymers were synthesised from 3-glycidoxypropyltrimethoxysilane (GPTMS) by hydrolysis of the silane func-tional groups in strongly acidic (pH 2) or basic (pH 10) conditions, followed by epoxy ring opening and crosslinking using diethylaminetriamine (DETA) and ethylene diamine (EDA). Structural characterization of the hybrid polymers was performed using FTIR spectros-copy. The thermal properties of GPTMS/DETA and GPTMS/EDA hybrid polymers were investigated by dierential scanning calorim-inuence of pH on the structure and properties of the synthesised GPTMS/DETA and GPTMS/EDA hybrids is discussed
Spectroscopic studies of interactions of polyaniline with some Cu(II) compounds
M. Gizdavic-Nikolaidis,,J. Travas-Sejdic,R.P. Cooney,and G.A. Bowmaker 한국물리학회 2006 Current Applied Physics Vol.6 No.3
The incorporation of planar Cu(II) complexes as dopants into ES-PANI through an ion-exchange process was investigated by spec-troscopic methods. A decrease in the intensity of the EPR signals from polarons in Cu(II) complex-doped PANI samples was observed,while the Cu(II) anion concentration increases and favors the formation of bipolarons in Cu(II) complex-doped PANI systems. A largeinuence of the copper complex counterion or the solvent on the conductivity in the PANI samples after ion-exchange has been observed.The reactions of EB-PANI following dierent levels of reduction or HCl doping with CuCl2 aqueous solution are also investigated andnew reaction mechanisms are proposed.