Rational Construction of Polymeric Mercuric(II) Imidazole with High Anion Exchange Capacity

Xiao, Bo; Li, Qian Qian; Li, Yang; Fang, Shao Ming

doi:10.4028/www.scientific.net/amr.239-242.2683

Cited by 1 publication

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References 6 publications

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“…Within CPs, those containing d 10 metal ions are widely explored for their high structural diversity and versatility, rich photophysical behavior, interesting electrical properties, and high luminance efficiency. ,− On the contrary, in spite of attractive properties of mercury(II) compounds in thermometers, manometers, paper industry, paints, cosmetics, preservatives, energy-efficient fluorescent light bulbs and batteries, the CPs reported with Hg(II) − are infrequent as compared to Zn(II) and Cd(II). − ,, To the best of our knowledge, so far no Hg(II)-based luminescent CPs have been exploited as multistimuli-responsive fluorescence-based sensor showing stimuli-triggered luminescent behavior via anion exchange and detections of NACs and solvents.…”

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confidence: 98%

Multistimuli-Responsive Hydrolytically Stable “Smart” Mercury(II) Coordination Polymer

2018

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A new one-dimensional double chain photoluminescent Hg(II) coordination polymer (CP), {[Hg(L)]·(ClO)} (1), was synthesized using a benzimidazole-appended tripodal tridentate ligand, 1,3,5-tris(benzimidazolylmethyl)benzene (L). The dynamic and flexible framework of 1 allows it to be entitled as first Hg(II)-based CP belonging to the rare category of CPs that exhibit multistimuli-responsive photoluminescence sensing properties and called as "smart" material. The sensitivity of this material via luminescence quenching method showing "turn off" behavior to a range of stimuli, including anions, solvents, and nitroaromatic compounds (NACs), offers more fine-grained control over its properties. 1 can easily adjust its channel dimensions to encapsulate different guest anions forming complete/partial anion-exchanged materials 1A-1B/1C-1E using NO, BF, OTf, OTs, and PF anions, respectively. Reversible (1A and 1B) and irreversible (1C-1E) anion exchange behaviors were observed for the complete and partial anion-exchanged products, respectively. The noteworthy feature of the anion-exchanged compounds is their anion-triggered luminescent behavior depending on different properties of anions.The excellent emission in water and high hydrolytic stability of 1 allows its use for rapid and efficient fluorescence-based detections of NACs in aquatic system. The uncoordinated pendant benzimidazole moiety in 1 serves as Lewis basic recognition site for trinitrophenol (TNP) detection, and along with electron- and energy-transfer mechanisms, 1 forms a luminescent probe for detection of TNP with low detection limits (0.55 ppm), exhibiting excellent photostability and recyclability. 1 also represents the first reported Hg(II)-based sensory CP material that can discriminate nitrophenol and nitroaniline isomers through fluorescence sensing.

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