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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제121회 학술발표회 및 총회 Colorimetric detection of UO22+ using gold nanoparticles immobilized with pillar[5]arene complex with nitrophenyldiacetic acids as chemoprobe

등록일
2018년 2월 5일 21시 56분 17초
접수번호
3947
발표코드
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발표시간
4월 19일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Inorganic Chemistry
저자 및
공동저자
SOJEONG HEO, Heekyoung Choi1, Jong Hwa Jung1,*
Nano Chemistry Laboratory, Gyeongsang National University, Korea
1Department of Chemistry, Gyeongsang National University, Korea
Uranium is an important raw material in nuclear energy generation, however, it is a critical radioactive component in the atmosphere, and it creates damage to human health. In this work, we report a simple, cost-effective, and selective colorimetric detection technique for UO22+ by using nitrophenyldiacetic acids (NPD) functionalized gold nanoparticles (Au NPs 1). The hybrid Au NPs 1 could be induced to aggregate in the presence of UO22+ ions. The UO22+ could be recognized by the colorimetric response of hybrid Au NPs 1, that can be observed by a UV-vis spectrophotometer, and it is easily detectable by naked eye. The hybrid Au NPs 1 bound by UO22+ possesses good selective response compared to other metal ions (Li+, Na+, K+, Rb+, Cs+, Ca2+, Mg2+, Ba2+, Ni2+, Zn2+, and Co2+), which led to a prominent color change. The color of the hybrid Au NPs 1 was also changed from the red to the dark red upon addition of UO22+ in the presence of other metal ions. From Job’s plot, we found that one NPD moiety attached onto the surface of Au NPs 1 forms 1:1 stoichiometry with UO22+. Hence, it provides a facile and effective colorimetric sensor for the real-time detection of UO22+.

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