Highly luminescent and stable lanthanide coordination polymers based 2-(3′, 4′-dicarboxyphenoxy)-benzoic acid: Crystal structure, photoluminescence, white light emission and fluorescence sensing. (October 2022)

• Record Type: Journal Article
• Authors: Wei, Mingming; Luo, Lilin; Cui, Ruifang; Wang, Xiong; Chen, Jingyao; Cai, Zelun; Li, Xia; Wei, Huibo; Wei, Chen; Bian, Zuqiang
• Is Part Of: Dyes and pigments. Volume 206(2022)
• Publication Date: 2022-10
• Subjects: Coordination polymer -- Photoluminescence -- White-light emission -- Fluorescence sensing; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2022.110650
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: New lanthanide coordination polymers (Ln-CPs), {[Ln(DPBA)(phen)2 ]·2H2 O}n (Ln = Eu 1, Tb 2, Gd 3 ), based on a ternary system containing 2-(3′, 4′-dicarboxyphenoxy)-benzoic acid (H3 DPBA) and 1, 10-phenanthroline (phen) were hydrothermally prepared. The Ln-CPs exhibit a 1D structure with [LnO4 N4 ] polyhedra and DPBA ligands, which can be extended to a 3D supramolecular network by water clusters and π-stacking. The coordination polymers have remarkable thermal stability up to 340 °C and solvent stability (in various solvents containing water in the 3–12 pH range). 1, 2, 3 show bright red, green, and blue emissions, respectively. Notably, 1 exhibits a very high photoluminescence quantum yield (PLQY) of 86%, which is among the best values for Ln-CPs. Energy transfer analysis is performed for Ln-CPs by DFT/TD-DFT calculations, solid-state phosphorescence (77 K) and UV–vis absorption spectra of Gd-CP. Favorable photostability of 1 is observed through a UV aging experiment, which shows that the PLQY of 1 maintained 55% of its initial value after 150 h Ultraviolet A (UVA) irradiation, which makes it potentially useful as a light conversion material. In addition, the Gd0.993 Eu0.0017 Tb0.0053 -CP codoped system shows white emission with a high PLQY of 35.09%, which is among the highly ranked as compared with reported white light emissions based on Ln-CPs. This highly luminescent Eu-CP can also be used as a sensitive fluorescence sensor for antibiotic detection in aqueous solution. Graphical abstract: Eu-CP and its isomorphic Tb/Gd-CPs were constructed from H3 DPBA and phen ligands. Eu-CP has excellent photoluminescence quantum yield, remarkable thermal and solvent stabilities, and favorable photostability under UV irradiation. A highly efficient white lighting material was prepared through a Ln(III) ion doping strategy. Also, Eu-CP has high sensitivity for antibiotics detection in aqueous solution. Image 1 Highlights: 1D highly luminescent and stable Ln-CPs with DPBA and phen ligands were constructed. Eu-CP exhibits high PLQY (86%). Eu-CP has remarkable thermally and solvent stabilities, and favorable photostability. Doped Gd:Eu/Tb-CP shows efficient white light emission with high PLQY (35.09%). Eu-CP can selectively detect MNZ, ONZ and RNZ in aqueous solution with high sensitivity.