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SUMMARY:Coherent multidimensional femtosecond spectroscopy – from basics
  to applications
DTSTART:20190328T171500
DTEND:20190328T181500
DTSTAMP:20260415T011224Z
UID:13db4321e1d77857849a43ae448703a9ce1894d380ddc840833f4975
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Jürgen Hauer\nAt the core of our perception of chemical
  transformation are ‘molecular movies’: we understand a reaction when 
 there is a satisfactory picture of bonds breaking and forming and when the
  sequence of such events is known. The appropriate timescale to observe an
 d interpret chemical reactions is given by the period of molecular vibrati
 ons\, i.e. in the femtosecond (fs) range. A carbon-carbon double bond for 
 instance vibrates with a period of roughly 20 fs. Accordingly\, femtosecon
 d spectroscopy has established itself as a fundamental tool in physical-ch
 emical sciences. Since its advent nearly three decades ago\, femtosecond s
 pectroscopy has diversified greatly\, with transient absorption as the mos
 t wide spread technique. The recently emerged two-dimensional electronic s
 pectroscopy (2D-ES) reports on the same non-linear signal as transient abs
 orption\, but with a maximally enriched information content\; in 2D-ES\, t
 he signal is resolved both in excitation and emission frequencies as well 
 as in its time-dependence.\n\nIn my talk\, I will introduce 2D-ES and disc
 uss several of its applications on molecular dynamics in biologically rele
 vant systems as well as in molecular J-aggregates.
LOCATION:BCH 2201 https://plan.epfl.ch/?room==BCH%202201
STATUS:CONFIRMED
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