Citations with the tag: FLASH photolysis

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  • Pico- and nano-second laser flash photolysis study on photoinduced charge separation in oligothiophene-C[sub 60] dyad molecules.
    Fujitsuka, Mamoru; Matsumoto, Keisuke; Ito, Osamu; Yamashiro, Takashi; Aso, Yoshio; Otsubo, Tetsuo // Research on Chemical Intermediates; 2001, Vol. 27 Issue 1/2, p73 

    Photoinduced charge separation (CS) and charge recombination (CR) processes of octathiophene-C[sub 60] and dodecathiophene-C[sub 60] dyad molecules (8T-C[sub 60] and 12T-C[sub 60], respectively) have been investigated by time-resolved absorption spectroscopy in the visible and near-IR regions....

  • Comparison of intermediates of tryptophan, tyrosine and their dipeptide induced by UV light and SO[sup .][sub 4][sup �].
    Song, Q.-H.; Guo, Q.-X.; Yao, S.-D.; Lin, N.-Y. // Research on Chemical Intermediates; 2002, Vol. 28 Issue 4, p329 

    The chemical processes of tryptophan (Trp), tyrosine (Tyr) and a dipeptide Trp-Tyr, which are induced by UV radiation and one-electron oxidation of SO[sup .][sub 4][sup �], have been investigated in aqueous solution by KrF (248 nm) laser flash photolysis. On the basis of optical studies,...

  • ArF laser flash photolysis of phenol and anisole.
    Kajii, Yoshizumi; Obi, Kinichi; Nakashima, Nobuaki; Yoshihara, Keitaro // Journal of Chemical Physics; 11/1/1987, Vol. 87 Issue 9, p5059 

    Absorption spectra of phenoxy radical in the gas phase are observed in the range of 210–300 nm in the ArF excimer laser (193 nm) flash photolysis of phenol and anisole. An intense absorption band is obtained around 230 nm and a broad band around 270–300 nm. In the photolysis of...

  • Bending overtones and barrier height of a 1A1 CH2 by flash photolysis stimulated emission pumping.
    Xie, Wei; Harkin, Carmel; Dai, Hai-Lung // Journal of Chemical Physics; 10/1/1990, Vol. 93 Issue 7, p4615 

    The J≤7 and Ka≤3 rotational levels of the bending vibrational overtones, (0,2,0), (0,3,0), and (0,4,0), and the (1,1,0) combination band of a 1A1CH2 were characterized in detail by stimulated emission spectroscopy. The methylene was generated from ketene photolysis. Spectroscopic...

  • PHOTOCHEMICAL STUDIES OF MANGANESE(III) QUADRIDENTATE SCHIFF BASE COMPLEXES AND CORRESPONDING SCHIFF BASES IN NON-AQUEOUS MEDIUM.
    Rajendiran, S.N.; Bhadbhade, M.M.; Natarajan, P. // Research on Chemical Intermediates; 1999, Vol. 25 Issue 7, p709 

    Presents a study which investigated the photochemical properties of some manganese(III) Schiff base complexes by continuous and flash photolysis methods in non-aqueous medium. Experimental methods; Results; Discussion.

  • Geometric and solvent effects on intramolecular phenolic hydrogen abstraction by carbonyl n,Ï€* and Ï€,Ï€* triplets.
    Lathioor, Edward C; Leigh, William J // Canadian Journal of Chemistry; Dec2001, Vol. 79 Issue 12, p1851 

    The photochemistry of a series of alkoxyacetophenone, -benzophenone, and -indanone derivatives, which contain a remote phenolic group linked to the ketone by a para,para'- or meta,meta'-oxyethyl spacer, has been studied in acetonitrile and dichloromethane solutions using laser flash photolysis...

  • Diffusion can explain the nonexponential rebinding of carbon monoxide to protoheme.
    Miers, Jeffrey B.; Postlewaite, Jay C.; Zyung, Taehyoung; Chen, Sheah; Roemig, Gary R.; Wen, Xiaoning; Dlott, Dana D.; Szabo, Attila // Journal of Chemical Physics; 12/15/1990, Vol. 93 Issue 12, p8771 

    The recombination after flash photolysis of carbon monoxide (CO) to protoheme (PH) in glycerol: water is studied over ten decades in time (1 ps to 10 ms). The rebinding consists of an initial nonexponential geminate phase followed by a slower exponential bimolecular phase. The entire time course...

  • Relaxation kinetics of diffusion-influenced reactions of the type A+B...C perturbed by flash....
    Jaeyoung Sung; Kook Joe Shin // Journal of Chemical Physics; 11/22/1998, Vol. 109 Issue 20, p9101 

    Examines the relaxation kinetics of diffusion-influenced reactions of the type A+B...C perturbed by flash photolysis. Displacement of the reactant species concentrations; Development of a relaxation kinetic theory; Applicability of the derived kinetic equations to reaction systems of any ...

  • Reduction of hexaammineruthenium(III) ions by a series of tris(polypyridyl)chromium(II) ions � Revisiting the Cr(NN)[sub 3] [sup 3+/2+] self-exchange rate.
    Zahir, K Omar // Canadian Journal of Chemistry; Jul2001, Vol. 79 Issue 7, p1124 

    The kinetics of the outer-sphere oxidation of Cr(NN)[sub 3] [sup 2+] ions (NN = 2,2'-bipyridine, 1,10-phenanthroline, and their substituted analogs) by hexaammineruthenium(III) was studied using laser flash photolysis. The Cr(NN)[sub 3] [sup 2+] ions were generated via the reductive quenching of...

  • MAGNETIC FIELD EFFECT ON PHOTOINDUCED ELECTRON TRANSFER REACTION BETWEEN [RU(BPY)[sub2](H[sub3]PZBZIM)][sup2+] AND N,N'-METHYL VIOLOGEN IN MICELLAR SOLUTION: A LASER FLASH PHOTOLYTIC STUDY IN HIGH FIELDS[sup#].
    Misra, Ajay; Haldar, Mintu; Chowdhury, Mihir // Research on Chemical Intermediates; 1999, Vol. 25 Issue 8, p813 

    Presents a study which investigated the magnetic field effect on the radical pair generated by the electron transfer from photoexcited [Ru(bpy)[sub 2](H[sub 3]pzbzim)](CIO[sub 4)[sub 2] to methyl viologen in aqueous sodium laurate micellar solution by using laser flash photolytic technique. ...

  • Flash photolysis studies of charge-transfer photochemistry of nickel(II) and cobalt(III) complexes.
    Prakash, H.; Natarajan, P. // Research on Chemical Intermediates; 2003, Vol. 29 Issue 4, p349 

    The photochemical behavior of cobalt(III) and nickel(II) complexes on excitation in the charge-transfer bands is reviewed in this article with particular reference to the study of intermediates. Investigations on the photoredox reactions of cobalt(III) and nickel(II) complexes using flash...

  • Photochemical properties of meso-substituted thiacarbocyanine dyes in solutions and in complexes with DNA.
    Pronkin, P.; Tatikolov, A.; Sklyarenko, V.; Kuz�min, V. // High Energy Chemistry; Jul2006, Vol. 40 Issue 4, p252 

    The processes of cis-trans photoisomerization and thermal back isomerization as well as the effect of DNA on the spectral and kinetic characteristics of the triplet state of a number of meso-substituted thiacarbocyanine dyes: 3,3�-diethyl-9-methoxythiacarbocyanine iodide (K1),...

  • Reaction of the tamoxifen cation and the bis-(4-methoxyphenyl)methyl cation in aqueous solutions containing 2'-deoxyguanosine.
    McClelland, Robert A; Sanchez, Cristina; Sauer, Effiette; Vukovic, Sinisa // Canadian Journal of Chemistry; Mar2002, Vol. 80 Issue 3, p269 

    The competition between 2'-deoxyguanosine (dG) and water has been quantitatively evaluated for the allylic carbocation derived from tamoxifen and for the stabilized diarylmethyl cation (bis-(4-methoxyphenyl)methyl). Both systems were examined by the competition kinetics method, in which the...

  • Photoinduced oxidation of sea salt halides by aromatic ketones: a source of halogenated radicals.
    Jammoul, A.; Dumas, S.; D'Anna, B.; George, C. // Atmospheric Chemistry & Physics; 2009, Vol. 9 Issue 13, p4229 

    The interactions between triplet state benzophenone and halide anion species (Cl-, Br- and I-) have been studied by laser flash photolysis (at 355 nm) in aqueous solutions at room temperature. The decay of the triplet state of benzophenone was followed at 525 nm. Triplet lifetime measurements...

  • Diode-array spectrometer (DAPS) for visible and near-IR absorption measurements with 10-ns time resolution.
    Sedlmair, Josef; Ballard, S. Gwyn; Mauzerall, David C. // Review of Scientific Instruments; Dec1986, Vol. 57 Issue 12, p2995 

    This paper describes a diode-array pulsed spectrometer (DAPS) that performs flash photolysis studies with a time resolution of 10 ns and a spectral resolution of 2.4 nm over a 600-nm wavelength window in the range of 350-1100 nm. It employs a 1024-element photodiode-array detector with high...

  • Implementation of an optical multichannel analyzer controller for nanosecond flash photolysis measurements.
    Lewis, J. W.; Yee, G. G.; Kliger, D. S. // Review of Scientific Instruments; Jun87, Vol. 58 Issue 6, p939 

    Traditionally optical multichannel analyzers (OMAs) have been turnkey instruments. Controllers are now available which replace the OMA console with the users existing computer. The increased flexibility of this approach comes at the expense of increased involvement in the details of system...

  • Picosecond flash photolysis apparatus with high absorbance resolution.
    Ebbesen, Thomas W. // Review of Scientific Instruments; Aug1988, Vol. 59 Issue 8, p1307 

    A new picosecond flash photolysis apparatus is described which makes extensive use of fiber optics in the probing beam pathway. The apparatus is simple and easy to use. The absorbance resolution and accuracy are greatly enhanced and allow for quantitative determination of properties of transient...

  • Simple modification of Varian E-line microwave bridges for fast time-resolved EPR spectroscopy.
    Forbes, Malcolm D. E.; Peterson, John; Breivogel, Christopher S. // Review of Scientific Instruments; Nov91, Vol. 62 Issue 11, p2662 

    Modification of the popular Varian E-line series of electron paramagnetic resonance (EPR) spectrometers for fast direct detection EPR spectroscopy is described. The overall time response and signal reproducibility of the spectrometer is improved by changing the values of two capacitors in the...

  • Rate constant for the reaction of O(3P) with diacetylene from 210 to 423 K.
    Mitchell, M. B.; Nava, D. F.; Stief, L. J. // Journal of Chemical Physics; 9/15/1986, Vol. 85 Issue 6, p3300 

    The absolute rate constant for the reaction of O(3P) with diacetylene (C4H2) has been measured as a function of pressure and temperature by the flash photolysis-resonance fluoresence method. At 298 K and below, no pressure dependence of the rate constant was observed but at 423 K a moderate...

  • Kinetic stabilizing effect of the 4-N-methylacetamido substituent on the phenylnitrenium ion.
    Ruane, Patrick H; McClelland, Robert A // Canadian Journal of Chemistry; Dec2001, Vol. 79 Issue 12, p1875 

    Photolysis of 4-(N-methylacetamido)phenyl azide in aqueous solution results in quantitative formation of the 4-(N-methylacetamido)phenylnitrenium ion, this cation arising from solvent protonation of an initially formed singlet arylnitrene. The cation is observed by flash photolysis,...

  • The photochemistry of 1-(3,5-dimethoxyphenyl)-2-(4-methoxyphenyl)ethyl ethanoate in alcohol solvents: A search for carbocation rearrangements.
    Roberts, J C; Pincock, J A // Canadian Journal of Chemistry; Jun2003, Vol. 81 Issue 6, p709 

    The photochemistry of the title compound 1 in methanol and 2,2,2-trifluoroethanol has been examined. In both solvents two ether products were obtained: one (18) resulting from trapping of the carbocation 2 (expected from photosolvolysis of 1), and the other (19) from the carbocation 3 (expected...

  • Electrophilicity of a 9-aryl-9-fluorenyl cation in water -- Kinetic evidence for antiaromaticity.
    Ward, Sarah; Messier, Tammy; Lukeman, Matthew // Canadian Journal of Chemistry; Jun2010, Vol. 88 Issue 6, p493 

    The 9-(4-methoxyphenyl)-9-nuorenyl cation (2) has been generated in 100% water by laser Hash photolysis of 9-(4-methoxyphenyl)-9-fluorenol (3), representing the first observation of a 9-fluorenyl cation in this solvent with lifetimes in the microsecond timescale. The relatively long lifetime...

  • A versatile flash photolysis apparatus.
    Beischel, Charles J.; Moore, Stacie K.; Crouch, Rosalie K.; Knapp, Daniel R. // Review of Scientific Instruments; Mar92, Vol. 63 Issue 3, p2069 

    A flash photolysis apparatus and sample cell suitable for photoaffinity labeling experiments are described and compared to a conventional continuous wave source using potassium ferrioxalate actinometry and activation of a model aryl azide photoaffinity label. The flash lamp enclosure is designed...

  • Photophysical properties of coumarin-120: Unusual behavior in nonpolar solvents.
    Pal, Haridas; Nad, Sanjukta; Kumbhakar, Manoj // Journal of Chemical Physics; 7/1/2003, Vol. 119 Issue 1, p443 

    Photophysical properties of coumarin-120 (C120; 7-amino-4-methyl-1,2-benzopyrone) dye have been investigated in different solvents using steady-state and time-resolved fluorescence and picosecond laser flash photolysis (LFP) and nanosecond pulse radiolysis (PR) techniques. C120 shows unusual...

  • Photofragments of Ni(CO)4: A linear combination of Gaussian-type orbitals (LCGTO) Xα study.
    Rösch, Notker; Jörg, Harald; Kotzian, Manfred // Journal of Chemical Physics; 4/1/1987, Vol. 86 Issue 7, p4038 

    The photolytic reaction of Ni(CO)4 upon UV irradiation has been studied theoretically using the LCGTO-Xα method. The origin of the observed luminescence is assigned to emission from the charge–transfer excited fragment Ni(CO)3 based on an analysis of the involved orbitals and on total...

  • Low-cost monochromatic microsecond flash microbeam apparatus for single-cell photolysis of rhodopsin or other photolabile pigments
    Sullivan, Jack M. // Review of Scientific Instruments; Feb1998, Vol. 69 Issue 2, p527 

    Develops a monochromatic microsecond flash microbeam apparatus for single-cell photolysis of rhodopsin and other photolabile pigments. Collimation of flashes in the xenon flash instrument; Transmission of the flash to the epifluorescent port of a microscope; Function of the objective lens of the...

  • Further investigation of the photodissociation dynamics of dichlorocarbene near 248 nm.
    Seung Keun Shin; Dagdigian, Paul J. // Journal of Chemical Physics; 4/21/2008, Vol. 128 Issue 15, p154322 

    A further investigation of the 248 nm photodissociation of CCl2, which expands upon our original study of this process [S. K. Shin and P. J. Dagdigian, Phys. Chem. Chem. Phys. 8, 3446 (2006)], is presented. The CCl2 parent molecule and the CCl photofragment were detected by laser fluorescence...

  • A study of Ar[sup +] laser-assisted Si doping of GaAs by chemical beam epitaxy.
    Shi, B. Q.; Shi, B.Q.; Tu, C. W.; Tu, C.W. // Applied Physics Letters; 3/27/2000, Vol. 76 Issue 13 

    Doping results from Ar[sup +] laser-assisted chemical beam epitaxy with triethylgallium, tris(dimethylamino) arsenic, and silicon tetrabromide precursors are reported. Enhancements in the n-type doping concentration are observed with laser irradiation in the substrate-temperature range 390-500...

  • High Resolution Optical Spectral Image of the Singlet and Triplet States of Dibenzanthracene in Polymethylmethacrylate.
    Bayrakçeken, Fuat // Asian Journal of Chemistry; 2012, Vol. 24 Issue 5, p2180 

    Highly sensitive detection of singlet-singlet, triplet-triplet optical absorptions and delayed fluorescence of 1,2:5,6-dibenzanthracene in polymethylmethacrylate were experimentally observed by flash and laser flash photolysis techniques. 1,2:5,6-Dibenzanthracene molecules were excited in a...

  • A LASER FLASH PHOTOLYSIS STUDY OF AMINO ACIDS AND DIPEPTIDES USING 4-NITRO-QUINOLINE 1-OXIDE AS A PHOTOSENSITIZER: THE pH DEPENDENCE.
    Sheng, Zhenyu; Song, Qinhua; Gao, Fan; Zhou, Xiaoguo; Li, Jiang; Dai, Jinghua; Sun, Haihong; Li, Quanxin; Yu, Shuqin; Ma, Xingxiao // Research on Chemical Intermediates; 2000, Vol. 26 Issue 7/8, p715 

    Presents a study which investigated the pH effects on the photochemical reaction of amino acids and related dipeptides with 4-nitroquinoline 1-oxide (4NQO) as a photosensitizer using laser flash photolysis. Overview of 4NQO; Materials and methods used; Results and discussion.

  • Studies on reactivity of benzoyl and benzoylperoxy radicals produced by laser flash photolysis of dibenzoyldiazene in aerated solutions.
    Hoshino, Mikio; Konishi, Reiko; Seto, Hideharu; Seki, Hiroshi; Sonoki, Hirotaka; Yokoyama, Takashi; Shimamori, Hiroshi // Research on Chemical Intermediates; 2001, Vol. 27 Issue 1/2, p189 

    Photolysis of dibenzoyldiazene gives benzoyl radicals. In aerated solutions, the benzoyl radicals react with oxygen to yield benzoylperoxy radicals. Spin trapping studies indicate that 5,5'dimethyl-1-pyrroline N-oxide reacts with the benzoylperoxy radicals to produce the adduct which exhibits...

  • Electron transfer reaction of 4,4'-bipyridine with triethylamine in acetonitrile: effect of water addition on the reaction dynamics.
    Ali, Sameh S.; Maeda, K.; Murai, H.; Azumi, T. // Research on Chemical Intermediates; 2003, Vol. 29 Issue 1, p1 

    The photo-induced electron-transfer reaction of 4,4'-bipyridine (BPY) with triethylamine (TEA) in acetonitrile is studied by laser flash photolysis. The reaction mechanism and kinetics are found very sensitive to the presence of a small amount of water. At low water concentrations (i.e. <0.003...

  • Study on electron transfer of fluorescent probe lumichrome and nucleic acid by laser flash photolysis.
    Hui Li; Zhi-Qin Jiang; Yang Pan; Shu-Qin Yu // Research on Chemical Intermediates; 2006, Vol. 32 Issue 8, p695 

    Laser flash photolysis (LFP) of lumichrome (LC) has been studied upon laser excitation at 355 nm. The transient absorption spectra of LC in aqueous solution displayed two bands at 380 nm and 540�700 nm for the triplet 3LC, and a wide band at 430�530 nm for the radical anion LC. The...

  • Photosensitized oxidation of methionine derivatives. Laser flash photolysis studies.
    Pedzinski, Tomasz; Markiewicz, Artur; Marciniak, Bronislaw // Research on Chemical Intermediates; 2009, Vol. 35 Issue 4, p497 

    The early events in the triplet 4-carboxybenzophenone (CB)-induced oxidation of N-acetyl-methionine methyl ester ( N-Ac-Met-OCH3) are investigated in aqueous solution. Upon electron transfer from the methionine residue of N-Ac-Met-OCH3 to 3CB*, the resulting sulfur radical cation undergoes...

  • Nanosecond probing of the early nucleation steps of silver atoms in colloidal zeolite by pulse radiolysis and flash photolysis techniques.
    Tahri, Z.; Luchez, F.; Yordanov, I.; Poizat, O.; Moissette, A.; Valtchev, V.; Mintova, S.; Mostafavi, M.; Waele, V. // Research on Chemical Intermediates; 2009, Vol. 35 Issue 4, p379 

    The process of formation and the subsequent aggregation of silver atoms (Ag0) in nanosized zeolite beta (BEA) are studied by transient absorption spectroscopy. The zeolite nanocrystals are stabilized in aqueous colloidal suspensions with a narrow particle size distribution in the range...

  • Localized Ca2+ uncaging induces Ca2+ release through IP3R in smooth muscle.
    Min Wang; Zheng Chen; Yan Xing; Xu Zhang; Xian-zhi Dong; Guang-ju Ji // Acta Pharmacologica Sinica; Jul2006, Vol. 27 Issue 7, p939 

    Aim: Our previous study indicated that there are two types of Ca2+ release events seen in intact mouse bladder tissue. In this study our aim is to investigate the mechanism that underlies the phenomena of Ca2+ release in smooth muscle. Methods: Single cells were isolated and tissue segments were...

  • Laser flash photolysis study on 9-phenylxanthenium tetrafluoroborate: Identification of new features due to the triplet state.
    BANERJEE, SANGHAMITRA; SAMANTA, ANUNAY // Journal of Chemical Sciences; Jan2011, Vol. 123 Issue 1, p15 

    Laser flash photolysis study on highly fluorescent and stable salt of 9-phenylxanthenium cation in neutral condition has been carried out for the first time. A new transient absorption band of this extensively studied system that perhaps remained buried under the fluorescence envelope and...

  • Remarkably stereoselective photoinduced electron-transfer reaction between zinc myoglobin and optically active binaphthyl bisviologen.
    Takashima, Hiroshi; Tanaka, Michiru; Hasegawa, Yuko; Tsukahara, Keiichi // Journal of Biological Inorganic Chemistry; May2003, Vol. 8 Issue 5, p499 

    We have designed and synthesized new optically active bisviologens ([BNMV]4+) containing a binaphthyl moiety to examine the stereoselective photoinduced electron-transfer (ET) reactions with zinc-substituted myoglobin (ZnMb) by flash photolysis. The photoexcited triplet state of ZnMb, 3(ZnMb)*,...

  • Primary Photophysical and Photochemical Processes in the Photolysis of 1,2-Dihydroquinolines in Different Solvents.
    Nekipelova, T.; Kuzmin, V. // High Energy Chemistry; Nov2005, Vol. 39 Issue 6, p392 

    The fluorescence lifetimes (tfl) of alkyl and alkoxy substituted dihydroquinolines ( DHQ) were measured in hexane, isopropanol, methanol, and water. It was shown that tfl was determined by the solvent nature and weakly depended on substituents on the DHQ aromatic ring and heterocycle, with tfl...

  • Electron transfer quenching studies of luminescent complex's of Ru (iii) with mixed ligands.
    Tripathi, P. N.; Verma, Smriti; Singh, R. P. // Journal of Experimental Sciences; Jan2012, Vol. 3 Issue 1, p14 

    In the present paper the reaction of Ru (III) perchlorates with some polytertiary phosphines and arsines has been investigated. The study of quenching of excited states of Ru (LL'-)33+ complexes and subsequent reaction occuring with potential reductant - amines, aromatic ether, nitro compounds,...

  • Use of an optical multichannel analyzer for recording absorption spectra of short-lived transients.
    Hunter, E. P. L.; Simic, M. G.; Michael, B. D. // Review of Scientific Instruments; Dec1985, Vol. 56 Issue 12, p2199 

    Characteristics of an adapted commercial optical multichannel analyzer system for recording of transient absorption spectra in single-shot pulse radiolysis and flash photolysis are described. The features discussed include temporal (2 μs) and spectral (1 nm) resolution, signal-to-noise ratio...

  • Munc13-1 acts as a priming factor for large dense-core vesicles in bovine chromaffin cells.
    Ashery, Uri; Varoqueaux, Frederique; Voets, Thomas; Betz, Andrea; Thakur, Pratima; Koch, Henriette; Neher, Erwin; Brose, Nils; Rettig, Jens // EMBO Journal; 7/15/2000, Vol. 19 Issue 14, p3586 

    In chromaffin cells the number of large dense-core vesicles (LDCVs) which can be released by brief, intense stimuli represents only a small fraction of the ‘morphologically docked’ vesicles at tile plasma membrane. Recently, it was shown that Munc13-1 is essential for a post-docking...

  • Flash photolysis study of the reactivity of isomeric forms of arylnitroso oxides toward triphenyl phosphite.
    Khursan, V.; Chainikova, E.; Safiullin, R. // High Energy Chemistry;  

    The kinetics of the reactions of phenylnitroso oxide and 4-CH3O-, 4-CH3-, and 4-Br-phenylnitroso oxides with triphenyl phosphite was studied in acetonitrile, benzene, and hexane by flash photolysis. The reaction occurs only with the trans-isomers of nitroso oxides. The value of the reaction rate...

  • Investigation of fulvic acid photochemistry in aqueous solutions by stationary and laser flash photolysis techniques.
    Makunina, M.; Pozdnyakov, I.; Grivin, V.; Plyusnin, V. // High Energy Chemistry; May2014, Vol. 48 Issue 3, p197 

    Photochemistry of fulvic acid ( FA, Henan ChangSneng Corporation) in aqueous solutions was studied using stationary and nanosecond laser (355 nm) flash photolysis. UV-excitation leads to formation of FA triplet state which is characterized by wide unstructured absorption band with maximum at 620...

  • Reactions of arylnitroso oxides with substituted styrenes: Kinetics and products.
    Chainikova, E. M.; Safiullin, R. L.; Faizrakhmanova, I. M.; Galkin, E. G. // Kinetics & Catalysis; Mar2009, Vol. 50 Issue 2, p174 

    The kinetics of the reactions of phenylnitroso oxide and 4-CH3O- and 4-Cl-phenylnitroso oxides with a series of substituted styrenes (4-X-C6H4-CH=CH2; X = H, CH3O, Cl, CN) in acetonitrile at 22 ± 2°C was studied using the flash photolysis technique. It was shown for 4-CH3O-C6H4NOO as an...

  • Porter, George (1920 - 2002).
    Chainikova, E. M.; Safiullin, R. L.; Faizrakhmanova, I. M.; Galkin, E. G. // Hutchinson Dictionary of Scientific Biography; 2005, p1 

    English physical chemist who developed the technique of flash photolysis for the direct study of extremely fast chemical reactions, for which achievement he shared the 1967 Nobel Prize for Chemistry with Ronald Norrish and Manfred

  • Comparison of Vanillin and Isovanillin Photolysis in Aqueous Solutions.
    Vusovich, O.; Lapin, I.; Svetlichnyi, V.; Sul'timova, N.; Tchaikovskaya, O. // Russian Physics Journal; Mar2014, Vol. 56 Issue 11, p1287 

    General kinetic regularities of reactions of stationary and laser photolysis of 3-methoxy-4-hydroxybenzaldehyde (vanillin) and 3-hydroxy-4-methoxybenzaldehyde (isovanillin) are investigated by the method of nanosecond laser flash-photolysis. The 4 harmonic of a Nd:YAG laser (λ = 266 nm) with...

  • Does acetone react with HO2 in the upper-troposphere?
    Dillon, T. J.; Pozzer, A.; Crowley, J. N.; Lelieveld, J. // Atmospheric Chemistry & Physics Discussions; 2010, Vol. 10 Issue 7, p16747 

    Recent theoretical calculations showed that reaction of HO2 with acetone (CH3C(O)CH3) could be a potentially important sink for acetone and source for acetic acid in cold parts of the atmosphere (e.g. the tropopause region). The reaction HO2+CH3C(O)CH 3(CH3)2C(OH)OO (R1, R-1) was therefore...

  • Pressure dependence of the absolute rate constant for the reaction Cl+C2H2 from 210–361 K.
    Brunning, J.; Stief, L. J. // Journal of Chemical Physics; 8/1/1985, Vol. 83 Issue 3, p1005 

    The pressure dependence of the absolute rate constant for the reaction Cl+C2H2 →M ClC2H2 has been examined at four temperatures ranging from 210–361 K using the flash photolysis-resonance fluorescence (FP-RF) techniques. The data has been fitted to the Troe expression to determine...

  • Ultraviolet spectroscopy of the B 2A’ and C 2A‘ states of FCO.
    Maricq, M. Matti; Szente, Joseph J.; Su, Yi; Francisco, Joseph S. // Journal of Chemical Physics; 6/15/1994, Vol. 100 Issue 12, p8673 

    Gas phase uv spectra of FCO obtained from the flash photolysis of F2, or F2CO, in the presence of CO are presented. The spectrum consists of three prominent progressions assigned to the B and C states of FCO and a fourth, weaker, progression which may belong to the second excited 2A’...

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