?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F8904%2F&rft.title=Studies+on+the+Alternatives+to+Stilbene+Based+Precipitons+and+Further+Applications+and+Designs+of+Precipitons.&rft.creator=Vaslowski%2C+Gregory&rft.description=Precipitons%2C+solubility-based+phase+tags%2C+can+be+used+in+similar+fashion+to+other+solution+based+phase+tags+without+many+of+the+disadvantages.+Structures+based+on+azobenzene+have+been+studied+as+alternatives+to+stilbene-based+precipitons.+The+double+bond+between+nitrogens+in+azobenzene+can+be+interconverted+between+cis+and+trans+by+UV+irradiation%2C+unlike+stilbene+which+only+isomerizes+in+the+cis+to+trans+direction.+The+analogous+nature+of+azobenzene+to+stilbene+was+the+basis+for+the+creation+and+study+of+possible+recyclable+alternatives+to+the+studied+stilbene+orignal.+Stilbene-based+precipiton+reagent+tags+have+also+been+studied.+Previous+studies+show+the+effectiveness+of+precipitons+as+a+substrate+tag.+To+show+the+precipiton's+effectiveness+as+a+reagent+scavenger%2C+several+carbodiimide-based+tags+have+been+synthesized+and+tested+as+reagent+scavengers.+Finally%2C+various+sulfoxides+tagged+with+a+stilbene-based+precipiton+have+been+synthesized+in+order+to+demonstrate+isolation+of+small+molecules+by+sublimation+from+solids.+Proof+of+principle+is+demonstrated+by+isomerizing+precipiton+tagged+sulfoxides+which+are+subsequently+heated+in+oil+and+release+several+small+allyl+protected+products.+These+products+are+isolated+and+characterized+by+common+methods.&rft.date=2007-09-19&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F8904%2F1%2FGregoryVaslowski-8-10-2007-MSThesis.pdf&rft.identifier=++Vaslowski%2C+Gregory++(2007)+Studies+on+the+Alternatives+to+Stilbene+Based+Precipitons+and+Further+Applications+and+Designs+of+Precipitons.++Master's+Thesis%2C+University+of+Pittsburgh.++++(Unpublished)++