Acyclic and cyclic imines and their metal complexes: recent progress in biomaterials and corrosion applications.

Wail Al Zoubi,Abbas Ali Salih Al-Hamdani,Agastya Prastita Mahendradhany,Saad Gomaa Mohamed,Young Gun Ko

doi:10.1039/c8ra01890a

Abstract

This review describes the contemporary development applications on scientific areas of acyclic and cyclic Schiff bases and their complexes with an emphasis on the author’s contribution to the field. After a short historical introduction, this manuscript is divided into two main parts. In the first section, Schiff bases are reviewed for their biological activities including antibacterial, antifungal, antioxidant, cytotoxic, and enzymatic activities as well as their interaction with single-stranded-DNA which have shown remarkable activities in each region of research. The second part deals with the corrosion of metal and its alloys in corrosive environments and their organic inhibitors. The main section of this part is to investigate the different chemical structures for Schiff bases used in such aggressive solution to protect metals. Knowing the maximum corrosion efficiency or bioactivity of a specific chemical structure in a specific application environment is helpful for choosing the most appropriate compound.

Highlights

The term Schiff base (SB) comes from the name of Hugo Schiff,[1,2] German by nationality, who prepared the rst so-called Schiff base in 1864.3,4 Schiff bases (SBs) contain the azomethine group (–RC]N–) and are typically synthesized by condensation reactions of an active carbonyl compound with a primary amine
Imine compounds are considered as a very signi cant category of organic compounds because of their capability to form complexes with metal ions and because of their pharmacological properties
According to the results of researches on the corrosion protection of metals, various chemical structures of Schiff bases are used for protecting metals from aggressive environments

Summary

Introduction

The term Schiff base (SB) comes from the name of Hugo Schiff,[1,2] German by nationality, who prepared the rst so-called Schiff base in 1864.3,4 Schiff bases (SBs) contain the azomethine group (–RC]N–) and are typically synthesized by condensation reactions of an active carbonyl compound with a primary amine. Due to imine (CH]N), hydroxyl (OH) and other groups SBs possess an important position in the biological eld.[24,25] As a consequence, a broad research eld dealing with cyclic and acyclic SBs and their metal complexes has led to an extensive number of works, and has been comprehensively studied in 201726 and 1987.27 In 2004, Hernandez-Molina and co-workers[28] reported some classical synthetic methods of asymmetric SBs derived from diaminomaleonitrile and their Zn, Cd and Cu complexes This provides a more general overview of the chemical synthesis of SBs, the preparation of various corresponding metal complexes and their different applications. We try to collect main experimental results of researches about metal corrosion inhibition in different Schiff bases, to present comprehensive insight for researchers with appropriate categories and to provide guidance for future studies in this eld

Biological and anti-corrosion applications of acyclic and cyclic Schiff bases

Biological activities of acyclic and cyclic Schiff bases

Schiff bases as corrosion inhibitors

Findings

Conclusion