Theoretical Investigation for the Coordination Complexes of Bis-Picolinic Acid Derivatives with Lead and Chromium

Under the same level of computer calculation accuracy, molecular simulation and analysis of the coordination structures of bis-picolinic acid derivatives with lead and chromium are carried out. Studies have found that the binding capacity of the bis-picolinic acid derivatives to chromium ions and the stability of the complexes formed by the bis-picolinic acid derivatives and chromium are stronger than that of lead. Moreover, after the bis-picolinic acid derivative is combined with chromium, a strong UV absorption peak will be produced, while there will never appear in the complexes combined lead.