TY - JOUR

T1 - Complex Uranyl Dichromates Templated by Aza-Crowns

AU - Siidra, Oleg I.

AU - Nazarchuk, Evgeny V.

AU - Charkin, Dmitry O.

AU - Kalmykov, Stepan N.

AU - Zadoya, Anastasiya I.

PY - 2018/12

Y1 - 2018/12

N2 - Three new uranyl dichromate compounds templated by aza-crown templates were obtained at room temperature by evaporation from aqueous solutions: 4 (3). The use of aza-crown templates made it possible to isolate unprecedented and complex one-dimensional units in 2 and 3, whereas the structure of 1 is based on simple uranyl-dichromate chains. It is very likely that the presence of relatively large organic molecules of aza-crown ethers does not allow uranyl chromate chain complexes to condense into the units of higher dimensionality (layers or frameworks). In general, the formation of 1, 2, and 3 is in agreement with the general principles elaborated for organically templated uranyl compounds. The negative charge of the [(UO 2)(Cr 2 O 7) 2 (H 2 O)] 2− , [(UO 2) 2 (CrO 4) 2 (Cr 2 O 7) 2 (H 2 O)] 4− and [(UO 2) 3 (CrO 4) 4 (Cr 2 O 7) 2 ] 6− one-dimensional inorganic motifs is compensated by the protonation of all nitrogen atoms in the molecules of aza-crowns.

AB - Three new uranyl dichromate compounds templated by aza-crown templates were obtained at room temperature by evaporation from aqueous solutions: 4 (3). The use of aza-crown templates made it possible to isolate unprecedented and complex one-dimensional units in 2 and 3, whereas the structure of 1 is based on simple uranyl-dichromate chains. It is very likely that the presence of relatively large organic molecules of aza-crown ethers does not allow uranyl chromate chain complexes to condense into the units of higher dimensionality (layers or frameworks). In general, the formation of 1, 2, and 3 is in agreement with the general principles elaborated for organically templated uranyl compounds. The negative charge of the [(UO 2)(Cr 2 O 7) 2 (H 2 O)] 2− , [(UO 2) 2 (CrO 4) 2 (Cr 2 O 7) 2 (H 2 O)] 4− and [(UO 2) 3 (CrO 4) 4 (Cr 2 O 7) 2 ] 6− one-dimensional inorganic motifs is compensated by the protonation of all nitrogen atoms in the molecules of aza-crowns.

M3 - Article

VL - 8

SP - 462

JO - Liquid Crystals Today

JF - Liquid Crystals Today

SN - 1358-314X

ER -