Synthesis, structure, fluorescence and electrochemical properties of a new Zn(ii)–organic framework constructed by a tricarboxylic acid ligand. (14th August 2019)

• Record Type: Journal Article
• Authors: Wang, Yan; He, Yuan-Chun; Zhao, Fang-Hua; Zhu, Kunlei; Li, Jie; Kan, Wei-Qiu; Jing, Zhihong; You, Jinmao
• Is Part Of: New journal of chemistry. Volume 43:Number 34(2019)
• Page Start: 13635
• Page End: 13641
• Publication Date: 2019-08-14
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c9nj02679g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A new efficient fluorescent sensor [Zn3 (L)(HL)(OH)(H2 O)3 ]·H2 O (1 ) for detecting Cr2 O7 2− anions has been synthesized. Moreover, compound1 has been calcined to prepare a new electrocatalyst R-C@800 for HER. Abstract : At present metal–organic frameworks (MOFs) provide an ideal platform for the preparation of various materials. In this work, a new efficient fluorescent sensor [Zn3 (L)(HL)(OH)(H2 O)3 ]·H2 O (1 ) for detecting Cr2 O7 2− anions has been synthesized. The luminescence intensities of compound1 with various types of anions (I −, PO4 3−, SO4 2−, NO3 −, CO3 2−, Br −, Cr2 O7 2− ) are investigated. The results demonstrate that compound1 could be a potential candidate for detecting Cr2 O7 2− anions with high selectivity and sensitivity. Additionally, electrocatalytic water-splitting is one of the most efficient ways to produce clean energy hydrogen, but commercially available catalysts are expensive. Hence a new material (R-C@800) has been prepared after the calcination treatment of compound1, and it is employed as a catalyst material for the hydrogen evolution reaction (HER) in KOH media. The overpotential of R-C@800 at the current density of 10 mA cm −2 is 395 mV. Moreover, the Tafel slope is estimated to be 191 mV dec −1 by fitting the corresponding Tafel plots extracted from the polarization curves. The results show that R-C@800 is a potential HER material.