The direct determination Mn2+ using carboxymethyl chitosan crosslinked with cyclodextrin containing hydrogen-bonded NC QDs (NC QD/CCSCD nanocomposites). The probable mechanism of the NC QD/CCSCD nanocomposites’ fluorescence was quenched by Mn2+ could be interpreted as acyclic crown ether chelation. Mn2+ induced the NC QD/CCSCD clusters assembly to…[Read more]