Newly designed Mn (III)–W(V) bimetallic assembly built by manganese (III) Schiff–base and octacyanotungstate(V) building blocks: Structural topologies, and magnetic features

Abstract

New complex [Mn (SB) 2 (DMF) 2 ] [W (CN) 8 ] hereafter referred to as complex 1, which was prepared by self-assembly of [Mn (SB) 2 (DMF) 2 ] 3+ and [W (CN) 8 ] 3− and structurally characterized by elemental analysis, infrared (IR) and single crystal X-ray techniques (H 2 SB is Schiff base derived from the condensation of salicylaldehyde and N,N-diethylethylenediamine and DMF is dimethylformamide). The structure consists of 1-D supramolecular chains and further stacks to give a 3-D supramolecular architecture whose molecular fragments are linked by hydrogen bond as well as C − HÁÁÁπ interactions between [Mn (SB) 2 (DMF) 2 ] 3+ and [W (CN) 8 ] 3−. An underlying net for the representation consists of two types of fragments with 1,4 M5-1 and 1,8 M9-1 topologies and further illustration of the molecular network in terms of a graph−theory approach using simplification procedure resulted in the underlying net of 2C1topological type in the complex 1. Magnetic susceptibility measurements of complex 1 was carried out in the temperature range 2-300 K, indicates the presence of either magnetic anisotropy zero field splitting, the effect of intramolecular interactions, or both. Complex

Multifunctional Zn(II) Coordination Polymer as Highly Selective Fluorescent Sensor and Adsorbent for Dyes

“…The Schiff bases (SBs), which are regarded as the condensation products of aldehydes (or ketones) and primary amines, results in the production of azomethine or imine groups (−C=N−), that can undergo coordination to the metal ion through its azomethine nitrogen [1]. The ease of the syntheses of the Schiff bases makes them suitable candidates for a wide range of applications in biology [2,3], in organic syntheses, catalysis [4], magnetochemistry [5,6], and superconductivity [3]. Among all the recognized organic sensors, Schiff bases are an assorted class of chemosensor that have been broadly used in the sensing of toxic metal ions (Cd 2+ , Pb 2+ , Hg 2+ etc.…”