Enantiomēru atpazīšana kristāliskā stāvoklī: izvēlētu mazu organisku molekulu enantiomēru veidotu cieto šķīdumu strukturālā un termodinamiskā daba
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Latvijas Universitāte
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lav
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eng
Abstract
Darbā pētītas vairākas cietos šķīdumus veidojošas enantiomēru sistēmas. Izpētīta izvēlēto savienojumu enantiotīro un racēmisko formu kristālisko cietfāžu daudzveidība (polimorfisms un solvatomorfisms). Enantiomēru sistēmas raksturotas ar divkomponentu fāžu diagrammām, norādot uz termodinamiski stabilu un metastabilu cieto šķīdumu veidošanos pilnā un nepilnā enantiomēru sastāva apgabalā. Noteiktas arī kristāliskās struktūras, atklājot cietos šķīdumus ar enantioselektīvām un stereonespecifiskām kristalogrāfiskajām pozīcijām. Noteikta pētīto savienojumu cieto šķīdumu strukturālā daba. ENANTIOMĒRU CIETIE ŠĶĪDUMI, ENANTIOMĒRU ATPAZĪŠANA KRISTĀLISKĀ STĀVOKLĪ, DIVKOMPONENTU FĀŽU DIAGRAMMAS, KVAZI−CENTROSIMETRISKAS STRUKTŪRAS, NESAKĀRTOTAS STRUKTŪRAS
Several systems of enantiomer solid solutions have been studied. Solid phase diversity, including polymorphism and solvatomorphism, of racemic and enantiopure forms of the studied compounds has been explored. The enantiomer systems have been characterized by melt phase diagrams showing stable and metastable solid solutions in full and limited composition regions. Furthermore, crystal structures have been determined revealing existence of solid solutions with enantioselective and non-stereospecific crystallographic molecular positions. The structural origin of the lack of enantiomer recognition in the studied systems has been determined. SOLID SOLUTIONS OF ENANTIOMERS, ENANTIOMER RECOGNITION IN THE SOLID STATE, MELT PHASE DIAGRAMS, QUASI−CENTROSYMMETRIC STRUCTURES, DISORDERED STRUCTURES
Several systems of enantiomer solid solutions have been studied. Solid phase diversity, including polymorphism and solvatomorphism, of racemic and enantiopure forms of the studied compounds has been explored. The enantiomer systems have been characterized by melt phase diagrams showing stable and metastable solid solutions in full and limited composition regions. Furthermore, crystal structures have been determined revealing existence of solid solutions with enantioselective and non-stereospecific crystallographic molecular positions. The structural origin of the lack of enantiomer recognition in the studied systems has been determined. SOLID SOLUTIONS OF ENANTIOMERS, ENANTIOMER RECOGNITION IN THE SOLID STATE, MELT PHASE DIAGRAMS, QUASI−CENTROSYMMETRIC STRUCTURES, DISORDERED STRUCTURES