A Propeller-like Uranyl Metallomesogen
نویسندگان
چکیده
منابع مشابه
A propeller-like uranyl metallomesogen.
Uranyl triflate forms with three imidazo[4,5-f]-1,10-phenanthroline ligands a propeller-like complex that exhibits a hexagonal columnar phase. The ligand is not liquid-crystalline, but a mesophase is induced upon complex formation with the uranyl salt. The thermal behavior has been investigated by polarizing optical microscopy and by high-temperature X-ray diffraction. A model of the stacking o...
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Configurationally stable, propeller-like triarylphosphine and triarylphosphine oxide can be synthesized; a chiral scaffold based on Lissoclinum-cyclopeptides linked via three peptide bonds with a triphenylphosphine and triphenylphosphine oxide moiety, respectively, prevents effectively epimerization at the chiral phosphorus atom.
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Ahstraet--Uranyl acetate solutions, ranging in concentration from about 100 ppm to 3700 ppm, were reacted with the Na-, K-, and Caforms of zeolite A. The crystalline products from the Naand K-A zeolites resembled compreignacite (K~O-6UO3' l lH~O) and from the Ca-A, becquerelite (CaO'6UO3. l lH~O). With higher concentrations of uranyl acetate, only X-ray-amorphous products were obtained. The com...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 2005
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja056664w