Maxim Pavlovich Yutkin

Porous metal–organic frameworks (MOFs) as matrices for inclusion compounds

Inclusion compounds based on metal–organic frameworks (MOFs) have promising practical application in gas storage, separation and fine purification of substances, as well as in catalysis. MOFs are crystalline compounds consisting of metal ions coordinated by bridging organic ligands that form porous structures. The kinetics of the thermal decomposition of the frameworks themselves, namely [Co2(camph)2bpy] and [Co2(asp)2bpy], was investigated (camph and asp are the anions of camphoric and aspartic acids, bpy is the organic amine, 4,4′-bipyridyl). The empty coordination polymer framework based on metal camphorates was thermally (kinetically) less stable than the polymer framework based on metal aspartate. A high kinetic stability of frameworks with aspartic complexes during heating was due to the entropic factor rather than the enthalpic one.

Synthesis, Crystal Structure, and Luminescence Properties of Coordination Polymers Based on Cadmium Isonicotinates

Heating a solution of cadmium nitrate and isonicotinic acid in N,N′-dimethylformamide or dimethyl sulfoxide gave three new coordination polymers, [Cd(Inic)2] · 0.5DMF (I), [Cd3(DMSO)6(Inic)2(SO4)2] (II), and [{Cd(DMSO)(Inic)}2(SO4)] · 2H2O (III), which were studied by X-ray crystallography. Compounds I and III were characterized by IR spectroscopy and elemental and thermogravimetric analyses and luminescence spectroscopy.

Synthesis and structure of chiral coordination polymers of CoII, CuII, and MgII saccharates

Chiral metal-organic coordination polymers [Co2(sacch)2]·1/2H2O·CH3OH (1), [Cu(sacch)(H2O)2]·3H2O (2), and [Mg(H2O)3(sacch)] (3) (H2sacch is d-saccharic acid) were synthesized from aqueous or water-methanol solutions of potassium hydrogen saccharate and a salt of the corresponding metal. The compositions and structures of the resulting compounds were determined by single-crystal X-ray diffraction and confirmed by X-ray powder diffraction, IR spectroscopy, thermogravimetry, and elemental analysis.

Structure of a framework coordination polymer Zn2(dmf)(H2O)(atc)]·0.75DMF·0.5H2O

In the interaction of Zn(NO3)2·6H2O and adamantane-1,3,5,7-tetracarboxylic acid (H4atc) in N,N′-dimethyl formamide (DMF) a three-dimensional coordination polymer with the composition [Zn2(dmf)(H2O)(atc)]·0.75DMF·0.5H2O (1) is produced. Its structure is determined by a single crystal X-ray diffraction study.

Crystal structure of metal-organic coordination polymers [Cu(bpy)2(H2O)2](NO3)2·4.5C2H5OH and [Cu2(bpy)(H2O)(L-pha)2](NO3)2·H2O

Two metal-organic coordination polymers [Cu(bpy)2(H2O)2](NO3)2·4.5C2H5OH (1) and [Cu2(bpy)(H2O)(L-pha) 2](NO3)2·H2O (2) (L-Hpha = L-phenylalanine, bpy = 4,4′-bipyridyl) are prepared by slow evaporation of an aqueous alcoholic solution of copper nitrate, L-phenylalanine, and 4,4′-bipyridyl. The structure and composition of the obtained compounds are determined by single crystal XRD. The framework of compound 1 is positively charged and forms two types of intersecting channels. Compound 2 is a homochiral metal-organic coordination polymer whose structure contains L-phenylalanine anions.