New Zinc functionalized metal organic Framework for selective sensing of chromate ion

Publication date: November 2017
Source:Sensors and Actuators B: Chemical, Volume 251
Author(s): R. Minmini, Sanay Naha, Sivan Velmathi
A modified metal organic framework have been prepared by the solvothermal process of 2-(4-carboxyphenyl)-1, 3-dioxoisoindoline-5-carboxylic acid with Zn(OAc)2.2H2O. The framework has a PtS − type net. The obtained porous material has been characterized by X-ray diffraction, Scanning electron microscopy, UV–vis spectroscopy, FTIR spectroscopy and BET surface area analysis. The BET surface area was 757m²/g⁻¹. The synthesized MOF exhibits reasonably good fluorescence characteristics. The luminescent studies indicates that the obtained Zn-MOF could be an efficient material for selectively sensing anion especially CrO4²⁻. The mechanism of sensing is also studied in detail. The Zn-MOF senses the anion without altering its structural integrity. This post-synthesis route can be used for synthesis of isomorphous metal–organic frameworks that cannot be obtained by direct synthesis.

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