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352 Newest Publications about the topic photochemical reaction

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Femtosecond to microsecond observation of the photochemical reaction of 1,2-di(quinolin-2-yl)disulfide with methyl methacrylate

17-May-2017 | Daisuke Koyama; Paul M. Donaldson; Andrew J. Orr-Ewing, Physical Chemistry Chemical Physics, 2017

The mechanism of the thiol–ene reaction induced by 330 nm ultraviolet excitation of 1,2-di(quinolin-2-yl)disulfide (QSSQ) in the presence of methyl methacrylate (MMA) is investigated by sub-picosecond to microsecond transient absorption spectroscopy. The measurements, spanning more than seven ...

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Molecules, Vol. 22, Pages 775: Transparent Nanotubular TiO2 Photoanodes Grown Directly on FTO Substrates

10-May-2017 | Paušová, Šárka ; Kment, Štěpán ; Zlámal, Martin ; Baudys, Michal ; Hubička, Zdeněk ; Krýsa, Josef, Molecules, 2017

This work describes the preparation of transparent TiO2 nanotube (TNT) arrays on fluorine-doped tin oxide (FTO) substrates. An optimized electrolyte composition (0.2 mol dm−3 NH4F and 4 mol dm−3 H2O in ethylene glycol) was used for the anodization of Ti films with different thicknesses (from 100 ...

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The Primary Photochemistry of Vision Occurs at the Molecular Speed Limit

13-Apr-2017 | Philip J. M. Johnson; Marwa H. Farag; Alexei Halpin; Takefumi Morizumi; Valentyn I. Prokhorenko; Jasper Knoester; Th ..., Journal of Physical Chemistry B, 2017

Ultrafast photochemical reactions are initiated by vibronic transitions from the reactant ground state to the excited potential energy surface, directly populating excited-state vibrational modes. The primary photochemical reaction of vision, the isomerization of retinal in the protein rhodopsin, ...

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Reactivity of Ketyl and Acetyl Radicals from Direct Solar Actinic Photolysis of Aqueous Pyruvic Acid

06-Apr-2017 | Alexis J. Eugene; Marcelo I. Guzman, Journal of Physical Chemistry A, 2017

The variable composition of secondary organic aerosols (SOA) contributes to the large uncertainty for predicting radiative forcing. A better understanding of the reaction mechanisms leading to aerosol formation such as for the photochemical reaction of aqueous pyruvic acid (PA) at λ ≥ 305 nm can ...

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Monitoring Photochemical Reactions Using Marangoni Flows

06-Apr-2017 | J. Muller; H. M. J. M. Wedershoven; A. A. Darhuber, Langmuir, 2017

We evaluated the sensitivity and time resolution of a technique for photochemical reaction monitoring based on the interferometric detection of the deformation of liquid films. The reaction products change the local surface tension and induce Marangoni flow in the liquid film. As a model system, ...

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Photochemical Reaction of OCSe with ClF in Argon Matrix: A Light-Driven Formation of XC(O)SeY (X, Y = F or Cl) Species

05-Apr-2017 | Jovanny A. Gómez Castaño; Rosana M. Romano; Carlos O. Della Védova; Helge Willner, Journal of Physical Chemistry A, 2017

The photochemistry of OCSe with ClF trapped together in argon matrices at cryogenic temperatures has been explored and the first interhalogen representatives of the elusive XC(O)SeY family, namely syn-ClC(O)SeF, anti-ClC(O)SeF, syn-FC(O)SeCl, and anti-FC(O)SeCl, as well as the hitherto triatomic ...

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Optomechanical Control of Quantum Yield in Trans–Cis Ultrafast Photoisomerization of a Retinal Chromophore Model

02-Mar-2017 | Alessio Valentini, Daniel Rivero, Felipe Zapata, Cristina García‐Iriepa, Marco Marazzi, Raúl Palmeiro, Ignacio Fdez. ..., Angewandte Chemie International Edition, 2017

Abstract The quantum yield of a photochemical reaction is one of the most fundamental quantities in photochemistry, as it measures the efficiency of the transduction of light energy into chemical energy. Nature has evolved photoreceptors in which the reactivity of a chromophore is enhanced by ...

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Looking at Photoinduced Charge Transfer Processes in the IR: Answers to Several Long-Standing Questions

09-Jan-2017 | Bogdan Dereka; Marius Koch; Eric Vauthey, Accounts of Chemical Research, 2017

ConspectusBecause of its crucial role in many areas of science and technology, photoinduced electron transfer is the most investigated photochemical reaction. Despite this, several important questions remain open. We present recent efforts to answer some of them, which concern both inter- and ...

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Fullerene as Photocatalyst: Visible-Light Induced Reaction of Perfluorinated α,ω-Diiodoalkanes with C60

03-Jan-2017 | Andrey Kh. Vorobiev; Ruslan R. Gazizov; Andrey Ya. Borschevskii; Vitaliy Yu. Markov; Vitaliy A. Ioutsi; Victor A. Br ..., Journal of Physical Chemistry A, 2017

Solution phase photochemical reaction of fullerene with perfluorinated alkyldiiodides I–RF–I can be efficiently initiated by visible range irradiation that targets solely the fullerene component. Photoinduced electron transfer from fullerene onto the diiodide component effects dissociative ...

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Macromol. Chem. Phys. 24/2016

16-Dec-2016 | Naofumi Naga, Saki Hashimoto, Tomoharu Miyanaga, Hidemitsu Furukawa, Macromolecular Chemistry and Physics, 2016

Front Cover: Fluorescence resonance energy transfer (FRET) sensitized emission of perylene by pyrene in a joint‐linker type organic‐inorganic hybrid gel is firstly observed. The present gels with controlled mesh size and homogeneous network should be usable as a molecular‐size flask to conduct ...

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