We are not able to resolve this OAI Identifier to the repository landing page. If you are the repository manager for this record, please head to the Dashboard and adjust the settings.
The spectroscopic properties of Cu(bio-monomer)nm+ complexes [BM=bio-monomer (purine, adenine, guanine, hypoxanthine, 5-ADP and 5-GMP)] in saponite clays have been investigated by diffuse reflectance spectroscopy (DRS) in the UV-Vis-NIR region and electron paramagnetic resonance (EPR) at X-band. Mono- and/or bis complexes of Cu(purine), Cu(adenine), Cu(5-ADP) and Cu(5-GMP) have been intercalated between the layers of saponite by a simple cation exchange procedure from aqueous solutions of pre-formed Cu(BM)nm+ complexes. Successful immobilisation was obtained with a BM:Cu2+ ratio of 5, but the exact coordination geometry of the intercalated complexes was determined by the overall Cu-loading, the pH of the initial exchange solution and the type of BM. Mono Cu(adenine) and Cu(purine) complexes with a NNOO coordination dominate at low Cu-loadings, or at an exchange solution pH between 3 and 4, whereas bis Cu(adenine)22+ and Cu(purine)22+ complexes with a NNNN coordination are exclusively present at higher Cu-loadings with an exchange solution pH between 5 and 8.On the other hand, clay-intercalated Cu(5-ADP)+ and Cu(5-GMP)+ are always present as mono-complexes, most probably in a NOOO coordination
Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.