Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/94533
Type: Artigo de periódico
Title: Detection Of Residual Acidic Groups In Several Poly(n-alkyl Methacrylate)s Using Photopnysical And Photochemical Probes
Author: Christoff M.
Yamaki S.B.
De Oliveira M.G.
Atvars T.D.Z.
Abstract: This work describes three different methods for detecting acidic groups copolymerized in poly(methyl methacrylate), poly(ethyl methacrylate), and poly(n-butyl methacrylate) chains using molecular spectroscopy. The first was based on the shift of the tautomeric equilibrium of 4-dimethylaminoazobenzene by acidic groups that modify the absorption band in the UV/vis spectra. We also show that the acidic groups present in the polymer influenced the anti-syn photoisomerization reaction of this dye. Further, a mercury- dithizonate complex was completely bleached when sorbed in poly(n-alkyl methacrylate) matrices containing acidic groups. Finally, Nile Blue A was used as a spectrophotometric probe to quantify the amount of acidic groups in these polymers. © 2004 Wiley Periodicals, Inc.
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Rights: fechado
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Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-1642409927&partnerID=40&md5=e5700278033a8ebc351d529248e32077
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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