{"id":274,"date":"2018-11-12T14:24:04","date_gmt":"2018-11-12T14:24:04","guid":{"rendered":"https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/?page_id=274"},"modified":"2018-12-14T15:29:36","modified_gmt":"2018-12-14T15:29:36","slug":"ottle-cells-for-epr","status":"publish","type":"page","link":"https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/optically-transparent-thin-layer-electrochemical-cells\/ottle-cells-for-epr\/","title":{"rendered":"EPR OTTLE Cell"},"content":{"rendered":"<p>Published here in (<em>Collect. Czech. Chem. Commun<\/em>., \u00a02001,\u00a0<strong style=\"letter-spacing: 0.08px\">66<\/strong><span style=\"letter-spacing: 0.08px\">,\u00a052-66) and based off of work by\u00a0Allendoerfer (1975) our electron paramagnetic resonance cell offers unparalleled performance,\u00a0 allowing users to both generate and <\/span>stabilize<span style=\"letter-spacing: 0.08px\">\u00a0the sometimes highly sensitive paramagnetic species.\u00a0<\/span><\/p>\n<h2>Electron Paramagnetic Resonance OTTLE Cell<\/h2>\n<p>To support our users in their investigations of paramagnetic species our cell has a number of impressive features.<\/p>\n<ul>\n<li>Coaxial design allows for a Au helical working &amp; Pt helical counter electrode to be placed into the EPR cavity.<br \/>\n<h3 style=\"letter-spacing: 0.08px\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-283 alignright\" style=\"font-size: 16px;letter-spacing: 0.08px\" src=\"https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/wp-content\/uploads\/sites\/66\/Unorganized\/epr-113x300.jpg\" alt=\"\" width=\"113\" height=\"300\" srcset=\"https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/wp-content\/uploads\/sites\/66\/Unorganized\/epr-113x300.jpg 113w, https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/wp-content\/uploads\/sites\/66\/Unorganized\/epr.jpg 225w\" sizes=\"auto, (max-width: 113px) 100vw, 113px\" \/><\/h3>\n<\/li>\n<li>Boasts a high surface area for rapid electrolysis and undistorted EPR signal.<\/li>\n<li>The potential at the WE is easily controlled by a Ag psuedo-reference electrode, placed just above the working electrode.<\/li>\n<li>Placement of the electrodes in the EPR cavity allows the cell to be evacuated &#8211; preventing decomposition of the radical species through exposure to moisture and air.<\/li>\n<li>Moreover, the cell can be simply cooled by placing into a Dewar-type holder which is preventing decomposition of the radical species through thermal means.<\/li>\n<\/ul>\n<h4>Case Study 1: Thermally-unstable radical cation of 3,6-diphenyl-1,2-dithiine<\/h4>\n<p>Electrochemical studies revealed that at E<sub>1\/2<\/sub> = + 0.665 V vs Fc\/Fc<sup>+<\/sup> the compound undergoes a 1e oxidation to the radical cation. While stable on the short time-scale of CV it was later revealed, by <a href=\"https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/optically-transparent-thin-layer-electrochemical-cells\/room-temperature-ottle-cell\/\">UV-VIS spectroelectrochemistry,<\/a> that on a time-scale of minutes, the cation decomposes thermally. In order to measure an EPR spectrum of the unstable radical cation it must be cooled to 233 K in DCM. The cell performs well under these conditions, as evidenced by the large signal-to-noise ratio and the rapid apperance of the EPR signal at the potential of the anodic wave.\u00a0 The spectrum indicates that the unpaired electron is largely localized on the sulfur atoms.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-297 \" src=\"https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/wp-content\/uploads\/sites\/66\/Unorganized\/EPR-CaseStudy1.png\" alt=\"\" width=\"462\" height=\"237\" srcset=\"https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/wp-content\/uploads\/sites\/66\/Unorganized\/EPR-CaseStudy1.png 1686w, https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/wp-content\/uploads\/sites\/66\/Unorganized\/EPR-CaseStudy1-300x154.png 300w, https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/wp-content\/uploads\/sites\/66\/Unorganized\/EPR-CaseStudy1-768x394.png 768w, https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/wp-content\/uploads\/sites\/66\/Unorganized\/EPR-CaseStudy1-1024x525.png 1024w\" sizes=\"auto, (max-width: 462px) 100vw, 462px\" \/><\/p>\n<h2>Obtain a quote<\/h2>\n<p><a href=\"https:\/\/research.reading.ac.uk\/spectroelectrochemistry\/faq\/\">Contact us to discuss your requirements and obtain a quote for one of our EPR OTTLE cells.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Our EPR cell offers users unparalleled detection of air, moisture and temperature sensitive paramagnetic species<\/p>\n","protected":false},"author":125,"featured_media":285,"parent":141,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"__cvm_playback_settings":[],"__cvm_video_id":"","footnotes":""},"class_list":["post-274","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8.1 - 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