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Spectroscopic characterization of Cu(II) complex ofl-phenylalanine andd,l-tryptophan

Authors
Journal
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy
1386-1425
Publisher
Elsevier
Publication Date
Volume
75
Issue
2
Identifiers
DOI: 10.1016/j.saa.2009.11.056
Keywords
  • L-Phenylalanine
  • D
  • L-Tryptophan
  • Copper(Ii)
  • Spectrophotometry
  • Reaction Kinetic

Abstract

Abstract In this work, the reactions involving l-phenylalanine and d, l-tryptophan in the presence of Cu(II) ion were studied. Optimum conditions for the reactions were established as pH 7 and λ = 641 nm. When the reaction was kinetic, it was observed that the following rate formula was found as dA/ A n = k dt and k = 3.2 × 10 −4 s −1, according to absorbance measurements. Using a perpetual change curve, the ratio of [Cu]/[Cu] + l-phenylalanine + [ d, l-tryptophan] was found 1:1:1. According to this result, one molecule of l-phenylalanine and one molecule of d, l-tryptophan react with one molecule Cu(II) ion.

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