title: Protonation effect on ligands in EuL: a luminescent switcher for fast naked-eye detection of HCl.
abstract: A new luminescent coordination polymer, EuH(L)(2)(NO(3))(2) (EuL, HL = 2-(2-pyridin-2-yl)quinoline-4-carboxylic acid), has been solvothermally synthesized, and its framework of uncoordinated pyridyl rings was exploited for the binding and specific sensing of HCl via a protonation effect. The protonation effect changes the energy of the excited state of the ligands, rendering them unable to act as efficient antennae for Eu(3+) characteristic emission. Thus, we have developed a new, fast and convenient sensor for HCl, a gas harmful for the environment.
authors.affiliation: Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou, Fujian 350002, China. czlu@fjirsm.ac.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Wen-Bin
authors.initials: WB
authors.lastname: Yang
authors.forename: Xiao-Yuan
authors.initials: XY
authors.lastname: Wu
authors.forename: Xiao-Fei
authors.initials: XF
authors.lastname: Kuang
authors.forename: Can-Zhong
authors.initials: CZ
authors.lastname: Lu
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005063:Europium / Q000737:chemistry*; D005740:Gases / Q000032:analysis*; D006851:Hydrochloric Acid / Q000032:analysis*; D008024:Ligands; D049449:Luminescence; D008163:Luminescent Measurements; D008958:Models, Molecular; D011108:Polymers / Q000737:chemistry; D011522:Protons; D011725:Pyridines / Q000737:chemistry*; D011804:Quinolines / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D005740:Gases; D008024:Ligands; D011108:Polymers; D011522:Protons; D011725:Pyridines; D011804:Quinolines; D005063:Europium; C059924:quinoline-4-carboxylic acid; D006851:Hydrochloric Acid