A dual-functional metal phosphate for high proton conduction and selective luminescence turn-on sensing of Co2+ ions. Issue 11 (20th February 2020)

• Record Type: Journal Article
• Authors: Zhou, Shu-Fang; Wu, Guo-Mei; Lin, Tian; Zhang, Chen-Xi; Wang, Qing-Lun
• Is Part Of: CrystEngComm. Volume 22:Issue 11(2020)
• Page Start: 2013
• Page End: 2019
• Publication Date: 2020-02-20
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce02031d
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : The {[Zn(H2 PIPZ)](H2 O)} n (compound 1 ) detects Co 2+ ions with turn on fluorescent and proton conductivity of composite membrane 1@PVA10 is ten times higher than compound 1 at 98% RH and 353 K. Abstract : In this work, {[Zn(H2 PIPZ)](H2 O)} n was synthesized by self-assembly of an N, N ′-piperazinebis(methylenephosphonic acid) [H4 PIPZ] ligand and zinc chloride under hydrothermal conditions. The Zn 2+ ion is four-coordinated by oxygen atoms from four different H2 PIPZ 2− ligands to form a tetrahedral configuration. The Zn 2+ tetrahedral units are further connected by a phosphate group of the H2 PIPZ 2− ligand to form a 3D structure. AC analysis shows that the proton conductivity of compound 1 is excellent and by introducing 1 into PVA to make composite membranes, the proton conductivity of composite membrane 1 @PVA-10 (10% wt) reached 2.78 × 10 −4 S cm −1 at 98% RH and 353 K, which is approximately ten times higher than that of 1 . In addition, compound 1 has excellent selectivity and sensitivity to cobalt ions in water due to turn on fluorescence. The detection limit is 1.0 × 10 −8 M. In contrast, the Fe 3+ ion has a turn off fluorescence effect on 1 and the detection limit is 1.0 × 10 −6 M.