Projekt 4. - Institut for Matematik og Datalogi - Syddansk Universitet
Projekt 4. - Institut for Matematik og Datalogi - Syddansk Universitet
Projekt 4. - Institut for Matematik og Datalogi - Syddansk Universitet
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N a t u r v i d e n s k a b e l i g t P r o j e k t / F a r m a c e u t : V a l g f r i t P r o j e k t<br />
<strong>Projekt</strong> 53. Polymorphism in crystalline aspirin: new<br />
tricks with mankind’s oldest drug<br />
Vejleder: Andrew Bond, adb@ifk.sdu.dk<br />
<strong>Institut</strong>: <strong>Institut</strong> <strong>for</strong> Fysik <strong>og</strong> Kemi (IFK)<br />
Praktisk del: <strong>Institut</strong>e<br />
Gruppeplacering: Library<br />
Gruppestørrelse: Minimum 3 and maximum 4 students. One group can work on the project.<br />
Kommentarer: The project is especially targeted at Pharmacy students, but it can be taken by<br />
any student on the Science Year. The project is undertaken in English.<br />
Keywords:<br />
Crystallisation, drugs, X-ray diffraction.<br />
Abstract<br />
Crystalline <strong>for</strong>ms of drugs are of paramount importance in the pharmaceutical industry <strong>for</strong> two<br />
main reasons: (i) the majority of drugs are administered as crystalline solids; (ii) the crystalline<br />
<strong>for</strong>m of a drug can influence pharmaceutically relevant properties such as solubility, bioavailability<br />
and processing ability (<strong>for</strong> example, tablet <strong>for</strong>mation). The term polymorphism refers to the<br />
ability of a particular molecule to adopt more than one crystalline <strong>for</strong>m. This project considers<br />
polymorphism in mankind‟s oldest drug, aspirin.<br />
Since the first determination of the aspirin crystal structure in 1967, there have been many claims<br />
in the literature <strong>for</strong> discovery of new aspirin polymorphs, but none could ever be conclusively<br />
proven. The puzzle was finally solved in 2007 through work per<strong>for</strong>med at SDU. This project<br />
studies aspirin polymorphism, and includes the following activities:<br />
(i) Survey of the literature concerning aspirin polymorphism.<br />
(ii) Synthesis and crystallisation of aspirin polymorphs.<br />
(iii) Characterisation of aspirin polymorphs using X-ray diffraction.<br />
(iv) Visualisation and understanding of the aspirin crystal structures.<br />
The project will provide an overview of crystalline solid <strong>for</strong>ms of pharmaceutical molecules, and<br />
give some experience in techniques <strong>for</strong> crystallisation and characterisation of crystalline solids.<br />
Minikurser<br />
Obligatorisk: <strong>Projekt</strong>arbejde (Microsoft, Nat).<br />
Anbefalede: Ingen.<br />
Litteraturliste over metode artikler, som udleveres til de studerende<br />
A. D. Bond, R. Boese and G. R. Desiraju, American Pharmaceutical Review, May/June 2007.<br />
Selected sections from J. Bernstein, Polymorphism in Molecular Crystals, Ox<strong>for</strong>d University<br />
Press, 2002.<br />
Selected sections from R. Hilfiker (ed.), Polymorphism in the Pharmaceutical Industry, Wiley-<br />
VCH, 2006.<br />
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