Citation: Jun Zhang, Shun Yang Yu, Tan Ji Yin, Xue Feng Hu, Wei Qin. A comparative study of four 20-membered N₂S₄-crown ethers as ionophores for polymeric membrane silver selective electrodes[J]. Chinese Chemical Letters, ;2010, 21(4): 464-467. doi: 10.1016/j.cclet.2009.11.028 shu

A comparative study of four 20-membered N₂S₄-crown ethers as ionophores for polymeric membrane silver selective electrodes

Jun Zhang ^a,b,c, ,
Shun Yang Yu ^a ,
Tan Ji Yin ^a ,
Xue Feng Hu ^a ,
Wei Qin ^a

a Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;
b Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
c Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 17 August 2009

Fund Project: This work was financially supported by the Chinese Academy of Sciences (No. KZCX2-YW-410), the National Natural Science Foundation of China (No. 40776058), the National 863 High Technology Project of the Ministry of Science and Technology of China (No. 2007AA09Z103), the Outstanding Youth Natural Science Foundation of Shandong Province (No. JQ200814) and the Taishan Scholar Program of Shandong Province.

Four 20-membered N₂S₄-monoazathiacrown ethers have been synthesized and explored as neutral ionophores for Ag⁺-selective electrodes.Potentiometric responses reveal that the flexibility of the ligands has great effect on the selectivity and sensitivity to Ag⁺ions.The electrode based on ionophore 9,10,20,25-tetrahydro-5H,12H-tribenzo[b,n,r][1,7,10,16,4,13]tetrathiadiaza cycloicosine6,13-(7H,14H)-dione(C)with 2-nitrophenyl octyl ether(ο-NPOE)as solvent in a poly(vinyl chloride)(PVC)membrane matrix shows a measuring range of 1.0×10^-6 to 1.0×10^-3 mol/L with a Nemstian slope of 54.9±0.3 mV/decade.This electrode has high selectivity for Ag⁺with negligible interference from many other cations and can be used in a wide pH range of 3.6-9.2.
- Ion-selective electrodes,
- Silver,
- Ionophore,
- Azathiacrown ether
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