| Popis: |
S serijo reakcij sem preverjala pomen topila in razmerja reagentov na reakcije diatrizoične kisline s temi reagenti. Z rentgensko praškovno analizo (PXRD), rentgensko strukturno analizo (SC XRD) in termogravimetrično analizo (TGA) sem ugotavljala nastanek kokristalov ali soli kot tudi navzočnost halogenskih vezi v trdninah. Kokristal je enotna kristalinična snov, katere kristalno rešetko sestavljajo nevtralne komponente, ki so pri standardnih pogojih v trdnem agregatnem stanju. Koristni so na raznih področjih, zlasti v farmaciji, saj so manj kemijsko labilni, imajo nižjo temperaturo tališča, imajo višjo hitrost raztapljanja in višjo topnost. Diatrizoična kislina se uporablja kot kontrastni medij pri rentgenskem slikanju za vizualizacijo internih organov in ožilja. Pri svojem magistrskem delu sem pripravila kristale diatrizoične kisline z nekaterimi dušikovimi spojinami. Strukture produktov sem potrdila z različnimi analiznimi metodami omenjenimi zgoraj. Produkti bi se potencialno lahko uporabili kot kontrastno sredstvo, ki bi imelo manj stranskih učinkov in bi bilo bolj varno za uporabo kot ta, ki se uporabljajo v medicini sedaj in v preteklosti. The impact of solvents and ratio of reactants in various reactions of diatrizoic acid with these reactants has been tested. The appearance of cocrystals and existance of halogen bonds in cocrystals was analysed by powder X-ray diffraction (PXRD), single crystal X-ray diffraction (SC XRD) and thermogravimetric analysis (TGA). Cocrystals are solid compounds that are crystalline single phase materials, they form a particular crystalline structure with particular properties, being a higher chemical stability, lower melting point, faster dissolution and higher solubility. Cocrystals can be applied in plenty different areas and are additionally frequently used in pharmacy for their unique characteristics. Diatrizoic acid is additionally used as a contrast medium in X-ray scans for visualization of internal organs and vessels. In my work I prepared crystals between diatrizoic acid and other nitrogen compounds and confirm their structure with analytical methods mentioned above. The products could potentially be used as new contrast medium with fewer side effects and would be safer to use than the contrast mediums used in the medicine currently and in the past. |
