A DSC-TLC analysis of thermolysis reactions involving 2'-deoxynucleosides |
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Authors: | P G Olafsson A M Bryan K Lau |
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Institution: | (1) Department of Chemistry, State University of New York at Albany, 12222 Albany, New York, USA |
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Abstract: | Differential scanning calorimetry (DSC) has provided a universal tool for ascertaining the effects of preparation and thermal history on the physical characteristics of polymers. When applied to the study of nonpolymeric compounds, however, the interpretation of thermal analysis data may be complicated by the possible occurrence of chemical as well as physical transformations under thermal stress. In the present study involving 2'-deoxynucleosides, this difficulty has been resolved by utilizing a DSC-TLC combination to correlate thermal phenomena with corresponding chemical and physical changes. This combination shows great promise in extending the application of DSC to the investigation of thermal reactions.
Zusammenfassung Die Differential-Scanning-Kalorimetrie (DSC) ist besonders geeignet zum Nachweis des Einflusses der Herstellungsbedingungen und thermischen Vorgeschichte auf die Beschaffenheit von Polymeren. Beim Einsatz zur Untersuchung nicht-polymerer Verbindungen kann jedoch die Deutung der Daten der Thermoanalyse schwierig werden, da durch thermische Stresswirkung chemische sowie physikalische Unwandlungen stattfinden können. In diesem Beitrag, der sich mit 2'-Desoxynucleosiden befasst, wurde diese Schwierigkeit durch Anwendung einer Kombination von DSC und TLC behoben, welche die Korrelation thermischer Erscheinungen mit den entsprechenden chemischen und physikalischen Änderungen gestattete. Diese Kombination von DSC und TLC ist hinsichtlich der Erweiterung des Anwendungsgebiets der DSC auf die Untersuchung thermischer Reaktionen vielversprechend.
Résumé L'analyse calorimétrique différentielle (DSC) est une méthode universelle pour mettre en évidence les effets de la préparation et du passé thermique sur les caractéristiques physiques des polymères. Cependant, si on l'applique à l'étude de composés non-polymères, l'interprétation des données d'analyse thermique peut être compliquée par l'intervention possible de transformations chimiques ou physiques sous l'effet du traitement thermique. Dans la présente étude sur les désoxy-2'-nucléosides cette difficulté est éliminée en combinant la DSC et la TLC afin d'établir une corrélation entre les phénomènes thermiques qui correspondent aux changements chimiques et physiques. L'emploi combiné de ces deux méthodes semble promis à une grande extension.
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![mcy](/content/t2317785l840155v/xxlarge1084.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![yacy](/content/t2317785l840155v/xxlarge1103.gif) ![mcy](/content/t2317785l840155v/xxlarge1084.gif) . ![Ecy](/content/t2317785l840155v/xxlarge1069.gif) ![tcy](/content/t2317785l840155v/xxlarge1090.gif) ![kcy](/content/t2317785l840155v/xxlarge1082.gif) ![ocy](/content/t2317785l840155v/xxlarge1086.gif) ![mcy](/content/t2317785l840155v/xxlarge1084.gif) ![bcy](/content/t2317785l840155v/xxlarge1073.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![rcy](/content/t2317785l840155v/xxlarge1088.gif) ![ocy](/content/t2317785l840155v/xxlarge1086.gif) ![acy](/content/t2317785l840155v/xxlarge1072.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![acy](/content/t2317785l840155v/xxlarge1072.gif) ![tcy](/content/t2317785l840155v/xxlarge1090.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![khcy](/content/t2317785l840155v/xxlarge1093.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![kcy](/content/t2317785l840155v/xxlarge1082.gif) ![yacy](/content/t2317785l840155v/xxlarge1103.gif) ![vcy](/content/t2317785l840155v/xxlarge1074.gif) ![lcy](/content/t2317785l840155v/xxlarge1083.gif) ![yacy](/content/t2317785l840155v/xxlarge1103.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![tcy](/content/t2317785l840155v/xxlarge1090.gif) ![scy](/content/t2317785l840155v/xxlarge1089.gif) ![mcy](/content/t2317785l840155v/xxlarge1084.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![gcy](/content/t2317785l840155v/xxlarge1075.gif) ![ocy](/content/t2317785l840155v/xxlarge1086.gif) ![ocy](/content/t2317785l840155v/xxlarge1086.gif) ![bcy](/content/t2317785l840155v/xxlarge1073.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![shchcy](/content/t2317785l840155v/xxlarge1097.gif) ![acy](/content/t2317785l840155v/xxlarge1072.gif) ** ![shchcy](/content/t2317785l840155v/xxlarge1097.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![rcy](/content/t2317785l840155v/xxlarge1088.gif) ![acy](/content/t2317785l840155v/xxlarge1072.gif) ![scy](/content/t2317785l840155v/xxlarge1089.gif) ![shcy](/content/t2317785l840155v/xxlarge1096.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![rcy](/content/t2317785l840155v/xxlarge1088.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![pcy](/content/t2317785l840155v/xxlarge1087.gif) ![rcy](/content/t2317785l840155v/xxlarge1088.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![Dcy](/content/t2317785l840155v/xxlarge1044.gif) ![Scy](/content/t2317785l840155v/xxlarge1057.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![scy](/content/t2317785l840155v/xxlarge1089.gif) ![scy](/content/t2317785l840155v/xxlarge1089.gif) ![lcy](/content/t2317785l840155v/xxlarge1083.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![dcy](/content/t2317785l840155v/xxlarge1076.gif) ![ocy](/content/t2317785l840155v/xxlarge1086.gif) ![acy](/content/t2317785l840155v/xxlarge1072.gif) ![ncy](/content/t2317785l840155v/xxlarge1085.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![tcy](/content/t2317785l840155v/xxlarge1090.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![rcy](/content/t2317785l840155v/xxlarge1088.gif) ![mcy](/content/t2317785l840155v/xxlarge1084.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![chcy](/content/t2317785l840155v/xxlarge1095.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![scy](/content/t2317785l840155v/xxlarge1089.gif) ![kcy](/content/t2317785l840155v/xxlarge1082.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) ![rcy](/content/t2317785l840155v/xxlarge1088.gif) ![iecy](/content/t2317785l840155v/xxlarge1077.gif) ![acy](/content/t2317785l840155v/xxlarge1072.gif) ![kcy](/content/t2317785l840155v/xxlarge1082.gif) ![tscy](/content/t2317785l840155v/xxlarge1094.gif) ![icy](/content/t2317785l840155v/xxlarge1080.gif) .
N.S.F. Undergraduate Research Participant from SUNY College at Plattsburg, Summer 1975. |
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