Turn-on fluorogenic and chromogenic detection of Fe3+and Cr3+in a completely water medium with polyacrylamide covalently bonding to rhodamine B using diethylenetriamine as a linker

Turn-on fluorogenic and chromogenic detection of Fe3+and Cr3+in a completely water medium with polyacrylamide covalently bonding to rhodamine B using diethylenetriamine as a linker