- 作者: 施正雄
- 作者服務機構: 台灣師範大學化學系
- 中文摘要: Artificial macrocyclic polyethers were synthesized and applied as neutral carriers for ion-selective PVC membrane electrodes, ion-chromatographic packing materials, extractants and adsorbents for ion separation, coating materials for piezoeletrical membrane sensors for organic species, and ion-transport carriers through liquid membranes. Ion-selective electrodes such as those for K/sup +/, Na/sup +/, UO/sub 2//sup 2+/, Cs/sup +/, Pb/sup 2+/, Fe/sup 3+/, Hg/sup 2+/ and Ag/sup +/ ions based on crown ether-phosphotungstic acid (PW) precipitates and dithio crown ethers respectively were prepared and showed good sensitivity and selectivity. Crown ether-PW precipitates were applied as adsorbents of rare-earth ions and some common heavy-metal ions. Some rare-earth ions were easily extracted with crown ethers, especially 15-crown-5. Poly(styrene/divinyl benzene) cryptand-22 resin was synthesized and applied as a bifunctional stationary phase of ion chromatography to separate both cations and anions, even some organic carboxylate geometric isomers. Crown ethers such as mono-benzo-15-crown-5 was successfully applied as a coating material on piezoelectric quartz membrane sensors for some organic species. The oscillation frequency of the crown-ether quartz-membrane sensor was sensitive to organic vapours such as amines and alcohols. Upon adsorption of organic species on the crown-ether quartz membrane, the oscillation frequency of the sensor decreased obviously. Special crown ether such as dibenzo-16-crown-5- oxyacetic acid, decyl-cryptand-22 and 1,4-dihydro-pyridine- 18-crown-5 were synthesized and successfully applied as ion- transport carriers (ionophores) for transport of Na/sup +/, K/sup +/ and Mg/sup 2+/ ions through liquid membranes.
- 英文摘要: --
- 中文關鍵字: Crown Ether; Ion-Selective Electrode; Adsorbent; Extractant; Ion Chromatography; Piezo-Electric Sensors; Ion Transport Carrier
- 英文關鍵字: 冠醚;離子選擇電極;吸附劑;萃取劑;離子層析法;離子傳送載體