intercalation of cytosine into eu3+-doped hydrocalumite and their fluorescent responses

Intercalation of cytosine into eu3+-doped hydrocalumites and the fluorescence of the eu3+-doped hydrocalumite response to cytosine has been investigated. xrd patterns showed that the basal spacing of eu-doped hydrocalumite obviously increased after it exposed to various content of cytosine, revealing the intercalation of cytosine into eu3+-doped hydrocalumite. tg-dsc curves and ir spectra of the intercalated samples are different from that of the eu-doped hydrocalumite and cytosine, indicating the interaction between the eu3+-doped hydrocalumite and cytosine. fluorescent spectra suggested that the fluorescent changes of eu3+-doped hydrocalumite depended on the concentration of cytosine solution. this fluorescent change would be potential application in biological probe in view of the biocompatibility of ca2+ ions and the fluorescence of eu3+ ions. moreover, the eu3+-doped hydrocalumite would be a healthy and cheap fluorescent material applied in biology or healing drugs fields.