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  • 02월 28일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Picogram detection of nitro-explosive compound using multiple emitting Polythiophenes-Coated CdTe QDs

2019년 2월 13일 12시 35분 03초
ANAL1.O-17 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 10시 : 04분
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
Mohamed Ragab Elsayed Ali, Salah Mahmoud Tawfik Ahmed1, Yong-ill Lee1,*
Changwon National University, Egypt
1Department of Chemistry, Changwon National University, Korea
A facile in-situ polymerization strategy has been performed to synthesize novel multiple emitting amphiphilic conjugated polythiophene-coated CdTe quantum dots as an optical sensor for the rapid, sensitive, selective, and on-site detection of 2,4,6-trinitrophenol (TNP). More importantly, portable, disposable, cost-effective, and easy-to-use paper strips and chitosan film were successfully applied to visually detect TNP concentrations as low as 1 nM. Using a smartphone with an easy-to-access and color-scanning App as a detection platform for the quantitative determination of TNP has also been demonstrated. The quantum dot-based sensor not only exhibits an excellent selectivity for TNP comparing with its analogues, but also possesses an excellent limit of detection of 0.56 nmol L-1 with linear ranges of 0.05-14 μmol L-1. Furthermore, the quantum dot sensor was successfully applied to determine TNP in tap and river water samples, presenting high recoveries in the range of 95.5–106.3% and 96.9-110.88% at three spiking levels with the relative standard deviation within 1.54-2.32% and 1.44-2.81%, respectively. This work unveiled an effective method for the sensitive and selective detection of TNP explosive toward national security and environmental protection. Keywords: QDs, trinitrophenol (TNP), river water, electron transfer mechanism.