{"92501":{"#nid":"92501","#data":{"type":"event","title":"(09-0217) Prof. Andrei Tokmakoff, MIT","body":[{"value":"\u003Cp\u003EProf. Andrei Tokmakoff, Massachusetts Institute of Technology\n\u003C\/p\u003E\n\u003Cp\u003EThe Dynamics of Hydroxide Transport in Water\n\u003C\/p\u003E\n\u003Cp\u003ECherry Emerson Series\n\u003C\/p\u003E\n\u003Cp\u003EIt is believed that the aqueous hydroxide ion possesses an anomalously fast diffusion constant because of its ability to accept a proton from a neighboring water molecule, leading to translocation of the ion.  This proposal is similar to the Grotthus mechanism for transport of an excess proton in water. We use femtosecond 2D IR spectroscopy to investigate this process through the vibrational dynamics of the OH stretching vibration in aqueous NaOD solutions.  Our experiments separate the dynamics of the hydroxide from those of its first solvation shell, characterize the kinetics for proton exchange and show signatures of the intermolecular proton transfer dynamics.  The interpretation of these experiments is assisted with spectroscopic modeling based on empirical valence bond simulations of this process. Our results show that transfer proceeds transiently through a Zundel-like configuration that evolves as a result of the fluctuations of the water hydrogen bonding network.\n\u003C\/p\u003E\n\u003Cp\u003EFor more information contact \u003Ca href=\u0022mailto:njohn3@mail.gatech.edu\u0022\u003EMs. Natalie John\u003C\/a\u003E.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Prof. Andrei Tokmakoff, Massachusetts Institute of Technology\n\nThe Dynamics of Hydroxide Transport in Water\n\nCherry Emerson Series","format":"limited_html"}],"field_summary_sentence":[{"value":"Prof. Andrei Tokmakoff, Massachusetts Institute of Technology"}],"uid":"27275","created_gmt":"2008-12-23 01:00:00","changed_gmt":"2016-10-08 01:57:16","author":"Shirley Tomes","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2009-02-17T14:00:00-05:00","event_time_end":"2009-02-17T15:00:00-05:00","event_time_end_last":"2009-02-17T15:00:00-05:00","gmt_time_start":"2009-02-17 19:00:00","gmt_time_end":"2009-02-17 20:00:00","gmt_time_end_last":"2009-02-17 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/web.mit.edu\/chemistry\/www\/faculty\/tokmakoff.html","title":"Prof. Andrei Tokmakoff, MIT"}],"groups":[{"id":"85951","name":"School of Chemistry and Biochemistry"}],"categories":[],"keywords":[{"id":"1692","name":"materials"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EShirley Tomes\u003C\/strong\u003E\u003Cbr \/\u003EChemistry \u0026amp; Biochemistry\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=st81\u0022\u003EContact Shirley Tomes\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404-894-0591\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}