New Zn(II) and Cu(II) complexes with in situ generated N2O2 siloxane Schiff base ligands
详细信息 查看全文
- 作者：Angelica Vlad ; Mirela-Fernanda Zaltariov ; Sergiu Shova ; Maria Cazacu ; mcazacu@icmpp.ro" class="auth_mail" title="E-mail the corresponding author ; Mihaela Avadanei ; Alina Soroceanu ; Petrisor Samoila
- 关键词：Metal complexes ; Self-assembly ; Siloxane Schiff bases ; Supramolecular polymeric chains ; X-ray diffraction
- 刊名：Polyhedron
- 出版年：2016
- 出版时间：5 September 2016
- 年：2016
- 卷：115
- 期：Complete
- 页码：76-85
- 全文大小：2133 K
文摘
Two novel mononuclear zinc(II) and copper(II) complexes of tetradentate N2O2 Schiff base ligands generated in situ by the template method were synthesized by the reaction of salicylicaldehyde and o-vanillin, respectively, with 1,3-bis(3-aminopropyl)tetramethyldisiloxane and the corresponding metal salts, in the presence of pyridine. The structures of the metal complexes were determined by elemental and spectral (IR, UV–Vis, ESI-MS) analyses as well as by single crystal X-ray diffraction, revealing a tetrahedral coordination geometry around the copper and zinc atoms ensured by the N2O2 donors of the Schiff bases. The crystalline structures are stabilized by intermolecular π–π stacking and short C–H⋯π interactions, which generate supramolecular polymeric chains. The absorption and emission properties of the complexes were studied in solution. The antimicrobial activity was assayed in vitro against three fungi and two bacteria species. Both complexes are moisture stable, as was proved by vapor sorption (DVS) analysis. The catalytic activity of the complexes was evaluated in the decomposition reaction of hydrogen peroxide.