A selective chromogenic chemosensor for carboxylate salt recognition
作者:Piotr Piątek
DOI:10.1039/c0cc05537a
日期:——
heteroditopic chromogenic chemosensor bearing a crown ether substituted at the intraannular position with a nitrophenylthiourea moiety has been synthesized. The binding behavior of this sensor was investigated by (1)H NMR spectroscopy and UV-vis spectroscopy. The receptor binds in a cooperative fashion to both a potassium cation and a carboxylate anion whereas a sodium cation sequesters an anion from the
Molecular receptors. Synthesis, x-ray crystal structures, and chemical properties of crown ethers bearing an intraannular phenolic group
作者:Christine M. Browne、George Ferguson、M. Anthony McKervey、D. Lindsay Mulholland、Thomas O'Connor、Masood Parvez
DOI:10.1021/ja00295a024
日期:1985.5
Intraannular functionalization of macrocyclic polyethers via organolithium intermediates
作者:Maria Skowronska-Ptasinska、Veronika M. L. J. Aarts、Richard J. M. Egberink、Johan Van Eerden、Sybolt Harkema、David N. Reinhoudt
DOI:10.1021/jo00258a017
日期:1988.11
Czech, Anna; Czech, Bronislaw P.; Desai, Dhimant H., Journal of Heterocyclic Chemistry, 1986, vol. 23, p. 1355 - 1358
作者:Czech, Anna、Czech, Bronislaw P.、Desai, Dhimant H.、Hallman, Johnny L.、Phillips, John B.、Bartsch, Richard A.
DOI:——
日期:——
Phenylazophenol-quinone phenylhydrazone tautomerism in chromogenic cryptands and corands with inward-facing phenolic units and their acyclic analogs
作者:Eddy Chapoteau、Bronislaw P. Czech、Carl R. Gebauer、Anand Kumar、Koonwah Leong、Daniel T. Mytych、Wolodymyr Zazulak、Dhimant H. Desai、Elzbieta Luboch
DOI:10.1021/jo00007a057
日期:1991.3
A series of 4-(4'-nitrophenol)azophenol compounds is prepared in which ether oxygen-containing substituents are attached at the 2- and 6-positions or connect the 2- and 6-positions to incorporate the chromophoric unit into corand or cryptand structures with inward-facing phenolic groups. The phenylazophenol-quinone phenylhydrazone tautomerism of these compounds, as probed by ultraviolet-visible spectroscopy, reveals a pronounced effect of the structure of the ether oxygen-containing substituents or bridging unit upon the tautomeric equilibrium. Chromogenic responses of five cryptands with inward-facing phenolic groups to sodium and potassium ions are determined and compared.