Abstract
A water soluble luminescent 1D metal organic coordination polymer of Zn(II) [Zn(FDA)(2,2′-bpy)(H2O)]·2H2O (2,2′-bpy = 2,2′-bipyridine and FDA = 2,5-furandicarboxylate), 1 was successfully synthesized by solvothermal method. This crystalline compound 1 showed strong luminescence emission at 325 nm upon excitation at 290 nm in aqueous medium. The luminescence intensity was highly sensitive towards a bio-metabolized purine derivative, uric acid (UA). However, it did not show any considerable response towards structurally similar other purine derivatives like adenine (Adn), guanine (Gua) and theobromine (Tbr). The compound 1 was found to be highly selective and sensitive towards uric acid (UA) with a detection limit of 300 ppb. The sensitivity and selectivity of 1 towards UA was also investigated in the presence of several metal ions, anions and organic bio-molecules which are commonly found in human urine. The results indicated that 1 could be a potential probe for selective detection and estimation of UA in urine. The mechanism of the sensing was explained successfully and it was also supported by DFT calculation.
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