A dual-emitting Rhodamine B-encapsulated Zn-based MOF for the selective sensing of Chromium(VI)

Rhodamine B-Zn-MOF composite (RhB-Zn-MOF) with dual emission intensity was synthesized through one pot synthesis by in-situ encapsulation of Rhodamine-B dye on new Zn-MOF metal–organic framework [(Zn(OAc)2(4-BrIPh) (1,10-phenonthroline)].2H2O, (4-BrIPh = 4-Bromoisophthalic acid). The synthesized encapsulated material was characterized by Elemental analyzer, FTIR, UV–Visible spectroscopy, TGA, single and powder X-ray diffraction and photoluminescence spectroscopy. It showed that the synthesized composite, RhB-Zn-MOF could be used as an efficient probe for the selective sensing of Cr(VI) in the presence of Cr(III) as well as other metal ions.