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Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide
นักวิจัย : Li, Junbo , Gao, Junkuo , Xiong, Wei-Wei , Li, Pei-Zhou , Zhang, Huacheng , Zhao, Yanli , Zhang, Qichun
คำค้น : DRNTU::Science::Chemistry.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : Li, J., Gao, J., Xiong, W.-W., Li, P.-Z., Zhang, H., Zhao, Y., et al. (2014). Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide. Chemistry - An Asian Journal, 9(1), 121-125. , 1861-4728 , http://hdl.handle.net/10220/19205 , http://dx.doi.org/10.1002/asia.201301144
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Chemistry - an Asian journal
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A new chemodosimeter based on pyridinium-fused pyridinone iodide (PI) has been obtained through a “clean reaction” method. This compound can detect CN− in aqueous solution with a high selectivity and rapid response. The detection of CN− occurs through the nucleophilic attack of CN− on the C[DOUBLE BOND]N bond, which induces the destruction of the π-conjugation on the pyridinium ring. Support of this detection mechanism was obtained by 1H NMR titration, HR-MS, and DFT calculations. Upon the addition of 10 equivalents CN− to a solution of PI in THF/H2O (1:1, v/v), a 57-fold enhancement in fluorescence intensity was observed at the maximum emission wavelength of 457 nm. Meanwhile, the maximum absorption wavelength was also blue-shifted from 447 nm to 355 nm. Other common anions such as BF4−, PF6−, F−, Cl−, Br−, I−, H2PO4−, ClO4−, CH3COO−, NO2−, N3−, and SCN− had little effect on the detection of CN−. The response time of PI for CN− was less than 5 seconds. The detection limit was calculated to be 5.4×10−8 m, which is lower than the maximum permission concentration in drinking water (1.9 μm) set by the World Health Organization (WHO).

บรรณานุกรม :
Li, Junbo , Gao, Junkuo , Xiong, Wei-Wei , Li, Pei-Zhou , Zhang, Huacheng , Zhao, Yanli , Zhang, Qichun . (2557). Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, Junbo , Gao, Junkuo , Xiong, Wei-Wei , Li, Pei-Zhou , Zhang, Huacheng , Zhao, Yanli , Zhang, Qichun . 2557. "Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, Junbo , Gao, Junkuo , Xiong, Wei-Wei , Li, Pei-Zhou , Zhang, Huacheng , Zhao, Yanli , Zhang, Qichun . "Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2557. Print.
Li, Junbo , Gao, Junkuo , Xiong, Wei-Wei , Li, Pei-Zhou , Zhang, Huacheng , Zhao, Yanli , Zhang, Qichun . Pyridinium-fused pyridinone : a novel “turn-on” fluorescent chemodosimeter for cyanide. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2557.