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Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism
นักวิจัย : Ding, Guoqiang , Lin, TingTing , Zhou, Rui , Dong, Yuliang , Xu, Jianwei , Lu, Xuehong
คำค้น : DRNTU::Science::Chemistry
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : Ding, G., Lin, T., Zhou, R., Dong, Y., Xu, J., & Lu, X. (2014). Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism. Chemistry - a European journal, in press. , 0947-6539 , http://hdl.handle.net/10220/20685 , http://dx.doi.org/10.1002/chem.201403133
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Chemistry - a European journal
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

An electrofluorochromic (EFC) conjugated copolymer (PEFC) containing carbazole and benzothiadiazole (BTD) moieties is synthesized through Suzuki coupling followed by electrochemical polymerization, resulting in a nanoporous EFC polymer electrode. The electrode exhibits high sensitivity and selectivity in the EFC detection of cyanide anions (CN−) in largely aqueous electrolyte (67 vol % water) because electrochemical oxidation of PEFC leads to significant fluorescence quenching, and the presence of different concentrations (1 to 100 μm) of CN− in the electrolyte can weaken the oxidative quenching to substantially different extents. Although PEFC is hydrophobic in the neutral state, it is converted to radical cation/dication states upon oxidation, rendering the PEFC some hydrophilicity. Moreover, its nanoporous morphology provides a large surface area and short diffusion distance, facilitating the movement of CN− in the electrolyte into the PEFC film to interact with receptors. Density functional theory calculations show that the noncovalent interaction between electron-deficient BTD and nucleophilic CN− is energy favorable in the oxidized states in both aqueous and organic media, suggesting that the specific π−–π+ interaction plays the main role in the CN− detection.

บรรณานุกรม :
Ding, Guoqiang , Lin, TingTing , Zhou, Rui , Dong, Yuliang , Xu, Jianwei , Lu, Xuehong . (2557). Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ding, Guoqiang , Lin, TingTing , Zhou, Rui , Dong, Yuliang , Xu, Jianwei , Lu, Xuehong . 2557. "Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ding, Guoqiang , Lin, TingTing , Zhou, Rui , Dong, Yuliang , Xu, Jianwei , Lu, Xuehong . "Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2557. Print.
Ding, Guoqiang , Lin, TingTing , Zhou, Rui , Dong, Yuliang , Xu, Jianwei , Lu, Xuehong . Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2557.