Analytical Chemistry p. 4234 - 4238 (1995)
Update date:2022-08-04
Topics:
Bocchi, Carlo
Careri, Maria
Casnati, Alessandro
Mori, Giovanni
A new series of calix-crowns were used in ion-selective electrodes with two solvents (dibutyl sebacate and o-nitrophenyl octyl ether). As ionophores, the 1,3-dimethoxy and the three different conformers of the 1,3-diisopropoxycalix[4]arene-crown-6 (i.e., 1,3-alternate, partial cone, and cone) were considered. Their behavior toward cesium ion was studied in terms of detection limit (DL), sensitivity (S, mV/pCs), and selectivity toward protons, ammonium, alkali, and alkaline earth metal ions. The lowest DL value was obtained for membranes containing the 1,3-diisopropoxy derivative in the 1,3-alternate conformation. To correlate the analytical results with the structural properties of the ligand and with the nature of the polymeric membrane, a multifactor ANOVA with interactions was carried out on selectivities toward univalent and divalent ions. As for the alkali metal ions, a highly significant negative correlation (p < 0.01) between the pKCS/Mpot values and the ionic radius was found; in addition, for the smaller ions H+, Li+, and Na+, the four ionophores showed higher differences in selectivity than for the larger ions K+ and Rb+ as well as for alkaline earth metal ions. Better results than those previously reported with other ligands in terms of DL (5 × 10-7 M) and pKCs/Mpot (4.46) were found for the 1,3-diisopropoxycalix-[4]arene-crown-6 in the 1,3-alternate conformation.
View MoreHubei Onward Bio-Development Co., Ltd.
Contact:+86-718-8417012
Address:No.517,Shizhou Avenue,Enshi City,Hubei Province,China,445002
Anhui Dexinjia Biopharm Co., Ltd
Contact:+86-531-82375818
Address:9 Hexie Road, kaifaqu, Taihe
PINGYUAN SIHUAN PHARMACEUTICAL CO., LTD
Contact:+86-531-55696072
Address:#2766,yinxiu Road, Economic Development Zone, Pingyuan Country, Shandong Province, China.
Shandong Jiulong Hisince Pharmaceutical Co.,Ltd.
Contact:+86-15853188990
Address:Huadian Pioneer Park, Huadian Township, Qihe County, Dezhou City, Shandong, P.R.China
SHANDONG CREDAGRI CHEMICAL CO., LTD.
Contact:+86-531-88872050
Address:ROOM 601A, BUILDING 2, SHUNTAI SQUARE, NO. 2000 SHUNHUA ROAD, HI-TECH DEVELOPMENT ZONE, JINAN, CHINA.
Doi:10.1021/ol901875z
(2009)Doi:10.1016/S0020-1693(00)85176-2
(1988)Doi:10.1021/jm901081g
(2009)Doi:10.1002/chem.200305301
(2003)Doi:10.1002/ejoc.201402673
(2014)Doi:10.1139/V09-069
(2009)