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Dispersible Novel Naphthalene-2,6-Dicarboxylic Acid Monomethyl Ester-Based Coordination Polymers Through In Situ Hydrolysis Reaction: Highly Sensitive Detection of Small Molecules and Metal Ions

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Two new naphthalene-2,6-dicarboxylic acid monomethyl ester-based coordination polymers formulated as [M(NDAME)2H2O] (M = Zn, 1; M = Cd, 2; NDAME = naphthalene-2,6-dicarboxylic acid monomethyl ester) have been synthesized through in situ hydrolysis of naphthalene-2,6-dicarboxylic acid dimethyl ester (NDADE) and characterized by elemental analyses, IR spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction (PXRD) and thermal gravimetric analysis (TGA). In compound 1, each NDAME ligand bridges two Zn into a one-dimension (1D) chain in a μ 2η 1 : η 1 coordination mode, in which two carboxyl groups and two Zn centers construct a distorted 8-membered ring. In compound 2, Cd metal centers are joined into 1D chain by NDAME ligand in μ 2η 1 : η 2 coordination mode, in which Cd centers and carboxyl oxygens are interconnected into an inorganic Cd–O chain. Notably, compounds 1 and 2 are stably dispersed in DMA without any stabilizer. The fluorescent properties of compounds 1 and 2 were investigated in the solid state and in various solvent emulsions. The results show that the photoluminescence of compounds 1 and 2 are both easily quenched by NB and 2-NT as well as Cu2+ ion and Fe3+ ion, showing highly naked-eye colorimetric sensing for small molecules and metal ions (NB = nitrobenzene and 2-NT = 2-nitrotoluene). The quenching mechanisms are also investigated in details.
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Document Type: Research Article

Publication date: 01 December 2017

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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