Covalent grafting of Cu(II)-histidine complexes on polystyrene resin studied by Photoacoustic Infrared Spectroscopy

Ottó Berkesi, Tímea Szabó, Barbara Korbély, Klara Hernadi, István Pálinkó

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to mimic copper-containing enzymes, Cu(II)-histidine complexes were grafted onto chloropropylated polystyrene resin. The Cu(II)-histidine complexes and the mobile polymer were thought to resemble the active centre and the proteomic skeleton of the enzymes, respectively. The resulting heterogenised complexes were expected to be nearly so active, selective and more durable catalysts that are easier to recycle than their homogeneous counterparts. The intended area of use is oxidation and dismutation reactions. Control for the syntheses was exerted by protecting either the N-terminal or the C-terminal of the covalently grafted L-histidine molecules. However, since the resin was reported to be amino group selective, covalent grafting was performed with the unprotected amino acid as well. During the preparative work generally applied methods of synthetic organic chemistry (alkylation or esterification) were used. The whole procedure was performed in isopropanol to allow appropriate swelling of the host polymer. After deprotecting the immobilised amino acids the complexes were prepared and the emerging structures (just as the full synthetic procedure) were studied by Photoacoustic Infrared Spectroscopy. The photoacoustic spectra revealed that the grafting was successful in each case and the complexes were formed too. However, real control over the preparation could only be proven when the protected amino acids were applied. On the basis of the spectra and chemical reasoning structural features of the immobilised complexes could be described.

Original languageEnglish
Title of host publicationForum Acusticum Budapest 2005
Subtitle of host publication4th European Congress on Acustics
Pages1459-1463
Number of pages5
Publication statusPublished - Dec 1 2005
Event4th European Congress on Acustics, Forum Acusticum 2005 - Budapest, Hungary
Duration: Aug 29 2005Sep 2 2005

Publication series

NameForum Acusticum Budapest 2005: 4th European Congress on Acustics

Other

Other4th European Congress on Acustics, Forum Acusticum 2005
CountryHungary
CityBudapest
Period8/29/059/2/05

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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    Berkesi, O., Szabó, T., Korbély, B., Hernadi, K., & Pálinkó, I. (2005). Covalent grafting of Cu(II)-histidine complexes on polystyrene resin studied by Photoacoustic Infrared Spectroscopy. In Forum Acusticum Budapest 2005: 4th European Congress on Acustics (pp. 1459-1463). (Forum Acusticum Budapest 2005: 4th European Congress on Acustics).