A novel chitosan based fluorescence chemosensor for selective detection of Fe (III) ion in acetic aqueous medium

ABSTRACT

Within this study, we have prepared 3-hydroxy-6H-benzo[c]chromen-6-one analogue grafted chitosan polymer. Mainly, 3-(3-chloropropoxy)-6H-benzo[c]chromen-6-one was synthesized from urolithin B and it was grafted on medium molecular weight chitosan (Uro-g-Ch). Employing our previous experience and observation on the characterisation of Urolithin B as a selective, fluorescent probe for sensing Iron (III), we have questioned its application in a polymer chain. Following that, we have conducted a serious of experiments to identify the fluorometric properties of the grafted polymer. Employing the λmax values detected for excitation and emission of fluorescent active-grafted polymer, the quenching effect of various metals on fluorescence was investigated based on grafted polymer–metal interactions. It was found that the grafted polymer displayed selective interaction with Iron (III) among the other metals tested (e.g. various +1, +2, +3 metals).

KEYWORDS:

• Chitosan
• urolitin B
• iron(III) ion
• fluorescent
• chemosensor
• selective detection

Disclosure statement

No potential conflict of interest was reported by the authors.