Potassium,calcium, and strontium complexes with diphenyloxo-18-crown-6. Synthesis and vibrational spectra

New K, Ca, and Sr complexes with diphenyloxo-18-crown-6 (2,3,5,6-dibenzo-1,4,7,10,13,16-hexaoxocyclooctadecadiene-2,5, DPO18C6) were prepared and isolated as solids. Their IR spectra (400–4000 cm^–1) were studied. On the basis of spectroscopic data, a structure was proposed for these compounds. In the complexes, DPO18C6 occurs in the inner sphere of K, Ca, and Sr. Only five oxygen atoms of the crown ether are involved in coordination, and the macrocycle conformation does not depend on the nature of the metal.Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 2, 2005, pp. 98–103.Original Russian Text Copyright © 2005 by Ivanova, Dorokhov, Kireeva, Pyatova, Yakshin, Tsivadze.     

Supramolecular organization of crown- and phosphoryl-containing magnesium and zinc phthalocyaninates in solutions of synthetic and natural surfactants

Russian Chemical Bulletin - The behavior of crown- and phosphoryl-containing magnesium and zinc phthalocyaninates in solutions of synthetic and natural surfactants is studied. In a phosphate buffer...     

Magnesium octa(benzo-15-crown-5)phthalocyaninate in the sodium dodecyl sulfate solutions: A study using electron and 1H NMR spectroscopy

The behavior of magnesium octa(benzo-15-crown-5)phthalocyaninate in water medium in the presence of sodium dodecyl sulfate was studied using both electronic and ¹H NMR spectroscopy, including the method of two-dimensional ¹H-¹H correlation NOESY. In the microheterogeneous environment of the CH₃(CH₂)₁₁OSO₃Na solutions at the concentrations of the latter close to the CMC the phthalocyanine is in monomeric form, while at the concentration less than the critical micelle-formation concentration it becomes a dimer or even more aggregated. The results of the NMR spectroscopic investigation indicate that magnesium octa(benzo-15-crown-5)phthalocyaninate preferrably binds to the CH₃(CH₂)₁₁OSO₃Na micelle in the hydrophobic region of the latter.     

Potassium and cesium thiocyanate complexes with diphenyloxa-21-crown-7: Synthesis and vibration spectra. Selective properties of dipnehyloxa-21-crown-7

Novel K and Cs complexes with diphenyloxa-21-crown-7 (2,3,5,6-dibenzo-1,4,7,10,13,16,19-heptaoxacyclo-heneicosadiene-2,5; DPO21C7) are synthesized and isolated in a solid state, and their IR spectra (4000–400 cm^–1) are studied. Only four ether O atoms of crown ether are involved in coordination. Conformation of a macrocycle in the complexes depends on the cation size. The potentiometric selectivity of diphenyloxa-21-crown-7 toward Cs⁺ ions was found to be the greatest.Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 3, 2005, pp. 163–167.Original Russian Text Copyright © 2005 by Ivanova, Dorokhov, Pyatova, Galkina, Yakshin, Tsivadze.This revised version was published online in April 2005 with a corrected cover date.This revised version was published online in April 2005 with a corrected cover date.