6059-62-7Relevant academic research and scientific papers
Novel Water-Soluble β-Cyclodextrin-Calix[4]arene Couples as Fluorescent Sensor Molecules for the Detection of Neutral Analytes
Buegler, Juergen,Engbersen, Johan F. J.,Reinhoudt, David N.
, p. 5339 - 5344 (1998)
The synthesis and the host-guest chemistry of two novel fluorescent β-cyclodextrin-calix[4]arene couples 1 and 2 is described. The compounds were prepared by coupling a β-cyclodextrin linked with an aminoxylyl spacer with two different calix[4]arene building blocks each bearing a fluorophore. The fluorophores attached to 1 and 2 are the 2-naphthylamine and the dansyl moiety, respectively. The unsymmetric calix[4]arene functionalization was achieved by monoprotection of the 1,3-diformylcalix[4]arene. The host molecules 1 and 2 were used as fluorescent probes for several organic analytes in aqueous solution. 1 shows sensitivity for a series of neutral organic guest species, such as steroids, terpenes, and other natural products. In contrast, compound 2 does not show sensitivity for organic analytes in aqueous solution. The different behavior of the two fluorescent probes 1 and 2 is explained by the different strength of self-inclusion of each fluorphoric group into the β-cyclodextrin cavity.
Photochemistry of Some Group V Onium Salts. Effect of Magnetic Nuclei on In-Cage Radical Coupling Reactions
Breslin, David T.,Saeva, Franklin D.
, p. 713 - 715 (2007/10/02)
A series of group V arylammonium, arylphosphonium, and arylarsonium salts have been synthesized and their photochemical behaviour investigated.Direct irradiation of the onium salts in acetonitrile provided photoproducts that were dependent on the magnitude of the nuclear hyperfine coupling constant of the heteroatom rather than spin-orbit coupling.The ammonium and phosphonium salts provided only out-of-cage coupling products while the arsonium salt provided both in-cage and out-of-cage coupling products.
