Strengthened adsorption films of double antibiotic medicines skeletons-based dendrimers on copper surface: Molecular dynamics simulation and intensified anti effects of algae, bacteria and corrosion

Abstract

In this study, an approach was proposed to achieve super anti-effects of alga, bacteria and corrosion for copper surface by employing strengthened adsorption films of dendritic compounds having double antibiotic medicine xacins skeletons. Thus, two new target dendritic compounds based on goal-orientation were prepared with the linear reference molecules carrying a single xacin segment. The adsorption of the studied compounds on copper surface was analyzed based on molecular modeling and material dynamic simulation. Furthermore, the spontaneous adsorption of copper surface of these molecules was performed in mixed DMSO/H2O (80/20, v/v). The copper surface adsorbed by the target molecules showed superior antialgae performance of Chlorella, and the maximum diameters of bacteriostatic zones against E. coli and S. aureus reached about 3.5 cm and 2.8 cm. Besides, the dynamic polarization and electrochemical impedance spectroscopy show that the target compounds achieved over 96% corrosion inhibition efficiency at 0.100 mM in 0.5 M H2SO4 solution. The adsorption of copper surface of the target molecules was deeply characterized such as X-ray photoelectron spectroscopy (XPS), which revealed that the target molecules are chemically adsorbed on the metal surface through the complexation of heteroatoms with metals.