Construction of Novel Luminescent Lanthanide Framework for Selective Sensing of Cu2+ and 4- Nitrophenol in water

Release time:2021-05-29  Hits:

• Impact Factor:4.174
• DOI number:10.1039/D0DT04089D
• Affiliation of Author(s):兰州交通大学
• Teaching and Research Group:化学与生物工程学院301室
• Journal:Dalton Transactions
• Place of Publication:英国皇家化学会
• Funded by:国家自然科学基金
• Abstract:It is challenging to develop highly stable lanthanide luminescent sensors for detecting heavy metal ions and nitroaromatics in view of human healthy and environmental security. To this end, two water stable Ln-MOFs with chemical constition of {[Ln(HL)]∙3DMF∙3H2O}n (Ln = Eu, LZG-Eu and Ln = Tb, LZG-Tb) have been developed solvothermally by using a multidentate ligand (H4L) with central phenyl backbone bisubstituted by 2,6-pyridine-dicarboxylic acid in para-position, H4L = 1,4-bis(2',2'',6',6''-tetracarboxy-1,4':4,4''-pyridyl)benzene. Single crystal analysis demonstrate that the two novel Ln-MOFs feature 4,4,4-connected nets with unprecedented topology symbol of {42.6.83}2{42.62.82}{42.84} and containing two kinds of one-dimensional channels. Powder X-ray diffraction as well as luminescence determination results indicate that they could remain their crystallinity and structural integrity in harsh acidic and basic conditions with pH ranging from 4~11. Moreover, they are highly luminescent to be excellent chemical sensors for detecting Cu2+ and 4-NP with high selectivity and sensitivity in aqueous media from deionized water, tap water to river water based on distinct quenching effects. To our best knowledge, their detection limits are lower than that documented so far. In addition, quenching efficiency of 4-NP retained in the presence of interfering ions even after the compound used for five cycles, which makes them attractive, reliable, visual and recyclable luminescent Ln-MOF sensor materials for 4-NP. The recognition mechanism for Cu2+ could be attributed to the dissociation of the main framework induced by Cu2+ and subsequent formation of a Cu2+ coordination species and that for 4-NP is considered to be the multiquenching mechanisms dominated with competition absorption.
• Co-author:于欣欣,王慧,宋富强
• First Author:蔺增刚
• Indexed by:Journal paper
• Correspondence Author:刘伟生,songxueqin
• Discipline:Natural Science
• First-Level Discipline:Chemistry
• Document Type:J
• Issue:50
• Page Number:1874-1886
• Translation or Not:no
• Date of Publication:2020-12-31
• Included Journals:SCI
• Links to published journals:https://vpnx.lzu.edu.cn/https/77726476706e69737468656265737421e0e2438f69227b5330079bab/en/content/articlelanding/2021/dt/d0dt04089d#!divAbstract

• 1.The construction of a novel luminescent.pdf