Synthesis of Prussian blue-embedded porous polymer for detection and removal of Cs ions. (5th December 2018) - Namgung, Ho
Abstract: A Prussian blue (PB)-embedded coordination polymer (COP) was prepared by simple incorporation of PB into a COP composed of 1, 1, 2, 2-tetrakis(4-carboxyphenyl)ethane and the Zn ion during the synthesis of COP. The PB-COP was prepared as micro-sized particles with green emission (490 nm) from the strongly fluorescent tetraphenylethene group in the solid state through aggregation-induced emission. The PB-COP showed particle shape with sizes ranging from 1 to 6 μm. As the PB in PB-COP efficiently adsorbed Cs ions, the microstructure of PB-COP was degraded to smaller particles, along with a concomitant decrease in the green fluorescence of the PB-COP. Such a decrease in the green emission of PB-COP was used as a signal for the presence of Cs ions, in which the limit of detection for Cs ions was found to be 73.8 ppb. The hybridized material of the PB-COP can be used as both an efficient adsorbent and a sensor for Cs ions, achieving simultaneous removal and detection. Graphical abstract: Highlights: A hybrid material was prepared with coordination polymer (COP) and Prussian blue (PB). COP was prepared by ionic interaction between COOH of organic molecules and Zn ions. The hybrid materials could remove efficiently Cs ions via adsorption on PB. The fluorescence of COP in hybrid materials also decreased upon exposure to Cs ions.