چكيده به لاتين
Metal-organic frameworks (MOFs) are a subdivision of coordination polymers which are constructed from metallic nodes or clusters and organic linkers through coordination bonds. They are in the center of scientists’ attention due to their unique properties such as high surface area, large pore volume, tunable structure and stability in various condition leading to a wide range of application including drug delivery, gas storage and separation, adsorption, sensing etc. In this study two pillar-layered MOFs, [Cu2(BDC)2(DABCO)] and its amine-functionalized isostructure, were successfully prepared to examine their performance in metal ions sensing via exploiting Photoluminescence-based method. These materials could recognize copper cations efficiently through changing the luminescent response in less than 20 minutes. With increasing the concentration of Cu(II) solution, first the luminescent response changes occurred intensely, then equilibrium was reached and no more changes were observed. In the presence of other metal cations, the sensors almost recognized the analyte selectively. At the end of the experimental tests, via using FTIR spectroscopy and PXRD patterns, the reasonable mechanism of sensing was proposed. They confirmed that the introduction of analyte does not collapse the structure, so just the chemical interaction between the walls of pores and Cu(II) ions are responsible for the purpose application.
