Synthesis and structure of a new fluorescent sensor based on Ba(II)‐multicarboxylate for detection of Cu2+ ion. Issue 10 (6th April 2021)

• Record Type: Journal Article
• Authors: Ma, Kui‐Rong; Yin, Jing‐Zhou; Kan, Yu‐He
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 647:Issue 10(2021)
• Page Start: 1118
• Page End: 1123
• Publication Date: 2021-04-06
• Subjects: Ba(II)-carboxylate -- coordination polymer -- structure -- fluorescent sensor; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.202100011
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract: A novel barium(II) coordination polymer (CP), [Ba3 (L)2 (H2 O)4 ] n 1, has been firstly isolated based on organic ligand 1‐[(2′‐carboxybiphenyl‐4‐yl)methyl]‐2‐propylimidazole‐4, 5‐dicarboxylic acid (H3 L=(HO2 C)2 (C3 N2 )(C3 H7 )CH2 (C6 H4 )(C6 H3 )CO2 H) by hydrothermal technique, and determined by single‐crystal X‐ray diffractions, elemental analysis, IR, powder X‐ray diffractions (PXRD). The Ba(II)‐CP 1 belongs to a novel 2‐D layer structure created from 1‐D serrated chain containing secondary building unit (SBU) [Ba(1)Ba(2)Ba(3)] via carboxylate group linkage. In 1, the ligand L 3− gives a variety of coordinated styles, nonadentate: μ 2 :( η 1 η 1 ), μ 2 :( η 1 η 1 ), μ 3 :( η 2 η 2 ) and decadentate: μ 1 :( η 1 η 1 ), μ 3 :( η 2 η 2 ), μ 3 :( η 1 η 2 ), μ 3 :( η 1 η 2 ), which is the first reported example. Moreover, the room‐temperature fluorescent measurements show that the Ba(II)‐CP 1 has specific ability to recognize copper(II) ion in aqueous solution by means of fluorescence quenching effect, corresponding obtained quenching constant K sv =1.18×10 2 M −1 and the limit of detection LOD=0.274 μM. Fluorescence titration experiment reveals that there is a good linear relationship between copper ion concentration and fluorescence intensity in the concentration range of 2.0×10 −6 ∼5.3×10 −6 mol ⋅ L −1 . The corresponding linear equation: y =402.41897–0.70486 x, and linear correlation coefficient: R 2 =0.99866 ( λ ex =310 nm and λ em =412 nm). Abstract :