1,8-dinitro-4,5-dihydroxyantraquinone--solid-state linear-polarized IR-spectroscopy of oriented colloid particles as a suspension in nematic liquid crystal.
By means of the linear-polarized IR-spectroscopic (IR-LD) tool to study the oriented solids samples as a colloid suspensions in nematic liquid crystal, the influence of the short contacts and pi-pi interactions in crystalline phase on IR-bands assignment and profile, i.e., relationship structure-spectroscopic properties, is studied in model system 1,8-dinitro-4,5-dihydroxyantraquinone. For a higher accuracy of the spectroscopic assignments a predetermination of the crystal structure in the same crystalline sample used in IR-LD spectroscopic elucidation is done. Some important aspects of pi-pi interactions and short contacts in solid phase are described. The advantages of the IR-LD method for an orientation of samples are demonstrated.
South-West University "Neofit Rilski", Department of Chemistry, 66 Ivan Mihailov Street, 2700 Blagoevgrad, Bulgaria. nasko50@yahoo.com
Atanas G
AG
Chapkanov
D000880:Anthraquinones / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry*; D003460:Crystallization; D006878:Hydroxides / Q000737:chemistry; D050866:Liquid Crystals / Q000737:chemistry*; D008956:Models, Chemical; D008968:Molecular Conformation; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry; D011809:Quinones / Q000737:chemistry*; D015203:Reproducibility of Results; D013053:Spectrophotometry / Q000379:methods; D013055:Spectrophotometry, Infrared / Q000379:methods*; D013535:Suspensions
D000880:Anthraquinones; D003102:Colloids; D006878:Hydroxides; D011809:Quinones; D013535:Suspensions; C538818:1,8-dinitro-4,5-dihydroxyanthraquinone; D010100:Oxygen