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제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Chelation enhanced fluorescence of rhodamine based organic nanoparticles for selective detection of mercury ions in aqueous medium

2019년 8월 23일 10시 43분 53초
ORGN.P-414 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 18일 (금요일) 11:00~12:30
Organic Chemistry
저자 및
Jin Sik Shin, Prasad Gajanan Mahajan1, Nilam Chandrakant Dige2, Balasaheb Daniyal Vanjare1, Ki Hwan Lee1,*
Department of Chemistry, Chungnam National University, Korea
1Department of Chemistry, Kongju National University, Korea
2Department of Biological Sciences, Kongju National University, Korea

A Schiff base centered fluorescent organic nanoparticles (FONs) were prepared by using rhodamine as structural core (RSB) and a stabilizer. The simple, easy and quick reprecipitation method has been employed for the preparation of FONs of RSB. The formation and morphology of FONs was confirmed by particle size analysis and scanning electron microscopy, respectively. The prepared FONs of RSB found to be more stable and photoactive for the neutral pH. A series of metal ion was used to investigate the change in fluorescence properties of RSB when in contact with and without the target metal ion solutions. Interestingly, only mercury (Hg2+) addition to FONs of RSB shows chelation induced enhanced fluorescence response. While, addition of other metal ions induces negligible fluorescence quenching effect with FONs of RSB. The interaction of FONs of RSB and Hg2+ introduces chelation enhanced fluorescence is unaltered even addition of other metal ion of higher concentration. The studies on UV–vis absorption titration, zeta-particle size, Job’s plot and modified Benesi-Hildebrand plot illustrates the strong complexation between FONs of RSB and Hg2+. Thus, such sensing properties posed by prepared FONs will open a simple and quick detection method for hazardous Hg2+ in an aqueous solution. The present analytical approach is advantageous over the traditional analysis methods.