Construction of Pendant‐Armed Schiff‐Base Macrocyclic Dinuclear Zinc Complexes and Their Selective Recognition of Acetate Ions. Issue 9 (13th July 2014)

• Record Type: Journal Article
• Authors: Zhang, Kun; Jin, Chao; Chen, Hui‐Qing; Yin, Gui; Huang, Wei
• Is Part Of: Chemistry, an Asian journal. Volume 9:Issue 9(2014:Sep.)
• Page Start: 2534
• Page End: 2541
• Publication Date: 2014-07-13
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201402357
• Languages: English
• ISSNs: 1861-4728

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Two new flexible extended dialdehydes (H₂hpdd and H₂pdd) with different functional pendant arms (CH₂CH₂PhOH and CH₂CH₂Ph) have been synthesized and reacted with 1, 2‐bis(2‐aminoethoxy)ethane to prepare Schiff‐base macrocyclic complexes in the presence of a Zn^II‐ion template. As a result, two preorganized dinuclear Zn^II intermediates (<bold>1</bold> and <bold>2</bold>), as well as two 42‐membered folded [2+2] macrocyclic dinuclear Zn^II complexes (<bold>3</bold> and <bold>4</bold>), were produced. The central zinc ions in compounds <bold>1</bold>, <bold>2</bold>, <bold>3</bold>, <bold>4</bold> showed distinguishable coordination patterns with the dialdehydes and the [2+2] macrocyclic ligands, in which a subtle pH‐adjustment function of the two pendant arms (with or without the phenolic hydroxy group) was believed to play a vital role. Furthermore, cation‐ and anion‐recognition experiments for complexes <bold>3</bold> and <bold>4</bold> revealed that they could selectively recognize acetate ions by the formation of 1:1 stoichiometric complexes, as verified by changes in their UV/Vis and MS (ESI) spectra and even by the naked eye.</p> </abstract>