The results of nematic liquid crystal - isotropic liquid phase transition study by the method of differential scanning calorimetry
for inclusion compounds - mesoporous aluminosilicate molecular sieves of MCM-41 type (including Cu-exchanged samples) with
encapsulated in inner-crystalline space nematic liquid crystal (5CB), as well as IR spectroscopic data for such compounds
were represented. It was shown, that the 5CB molecules are able to interact with the active centers in the MCM-41 channels
forming strong enough bonds of -C≡N⋅⋅⋅H-O- type. The relative amount of 5CB molecules interacting with the walls of channels
and those retaining ‘liquid crystalline’ state in binary systems of molecular sieves MCM-41 and CuMCM-41 was estimated. This
conclusion was confirmed by the data obtained from differential scanning calorimetry measurements.