Spectroscopic characterization of Cu(II) complex of l-phenylalanine and d,l-tryptophan

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/An = 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.