title: Product accumulation for ultrasensitive femtochemistry.
abstract: We present a novel experimental method for studying photochemical reactions that involve permanent products. The accumulation of photoproducts facilitates the measurement of extremely small product yields. A calibration of the setup accounts for diffusion effects, and the experimental results can be expressed in terms of single-pulse photochemical efficiencies. A demonstration experiment on indocyanine green (ICG) is presented. The general method is suited both for femtosecond spectroscopy and quantum control experiments.
authors.affiliation: Institut für Physikalische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Langhojer
authors.forename: Frank
authors.initials: F
authors.lastname: Dimler
authors.forename: Gregor
authors.initials: G
authors.lastname: Jung
authors.forename: Tobias
authors.initials: T
authors.lastname: Brixner
mesh_terms: D002138:Calibration; D002621:Chemistry / Q000295:instrumentation* / Q000379:methods*; D004396:Coloring Agents / Q000737:chemistry*; D004058:Diffusion; D004867:Equipment Design; D007208:Indocyanine Green / Q000737:chemistry*; D007834:Lasers; D008956:Models, Chemical; D015233:Models, Statistical; D008962:Models, Theoretical; D010777:Photochemistry / Q000295:instrumentation* / Q000379:methods*; D011789:Quantum Theory; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000295:instrumentation* / Q000379:methods; D013997:Time Factors
chemical_list: D004396:Coloring Agents; D007208:Indocyanine Green