Results 51 to 60 of about 44,713 (249)

CN and HCN in Dense Interstellar Clouds

, 2005
We present a theoretical investigation of CN and HCN molecule formation in dense interstellar clouds. We study the gas-phase CN and HCN production efficiencies from the outer photon-dominated regions (PDRs) into the opaque cosmic-ray dominated cores.
Amiel Sternberg, Bachiller R., Bachiller R., de Boisanger C., Flower D. R., Fuente A., Gai I. Boger, Greaves J. S., Herbst E., Jansen D. J., Le Bourlot J., Le Bourlot J., Lee H.-H., Lindqvist M., Messing I., Pineau des Forets G., Schilke P., Simon R., Storzer H., Truong-Bach, Viala Y. P., Vikor L.   +21 more
core   +2 more sources

Single and Double Photoionization and Photodissociation of Toluene by Soft X-rays in Circumstellar Environment [PDF]

, 2016
The formation of polycyclic aromatic hydrocarbons (PAHs) and their methyl derivatives occurs mainly in the dust shells of asymptotic giant branch (AGB) stars.
Boechat-Roberty, H. M., Fantuzzi, F., Monfredini, T., Nascimento, M. A. C., Wolff, W.   +4 more
core   +2 more sources

Engineering Photolabile Cyclopentane‐Fused Coumarins: From One‐Pot Synthesis to Mechanistic Study for Visible Light‐Triggered Photolysis

Chemistry – An Asian Journal, EarlyView.
Cyclopentane fusion in coumarin photocages transforms their behavior from rapid SN1‐mediated release (minutes) to a slower elimination pathway (hours), accompanied by dramatic spectral changes upon photolysis, providing complementary tools for controlled‐release applications requiring different payload delivery rates.
Jau‐Tien Lin, Hsuan‐Yu Lin, Tai‐Chung Lo, Chih‐Ling Lin, Yi‐Hsien Li, Wei‐Hao Wu, Ting‐Yi Hsieh, Shun‐Yuan Luo, Chih‐Chien Chu   +8 more
wiley   +1 more source

Fano interference and cross-section fluctuations in molecular photodissociation

, 2003
We derive an expression for the total photodissociation cross section of a molecule incorporating both indirect processes that proceed through excited resonances, and direct processes.
B. Mehlig, C. Mahaux, F. Haake, H. Feshbach, K. Kobayashi, O. Bohigas, S. A. Reid, T. Gorin, T. W. Canzler, W. Ihra, Y. Alhassid, Yan V. Fyodorov   +11 more
core   +1 more source

Advancing Light‐Triggered Alkyd Paint Curing: (Cp)FeII(naphthalene)](PF6) Catalysts with Enhanced Photosensitivity and Increased Performance in Pigmented Alkyd Paints

ChemistryEurope, EarlyView.
[(Cp)FeII(naphthalene)](PF6) catalysts are reported with improved curing efficiency of alkyd paints compared to [(Cp)FeII(arene)](PF6), particularly in dark‐pigmented formulations. Their improved photosensitivity enables faster drying at lower concentrations, presenting a promising alternative to conventional industrial driers under regulatory pressure.
Jens Tolboom, Alexis K. Bauer, Johan Bootsma, Jitte Flapper, Michael L. Neidig, Bas de Bruin   +5 more
wiley   +1 more source

X-ray induced Coulomb explosion imaging of transient excited-state structural rearrangements in CS2

Communications Physics, 2023
Structural imaging of transient excited-state species is a key goal of molecular physics, promising to unveil rich information about the dynamics underpinning photochemical transformations.
James Unwin, Felix Allum, Mathew Britton, Ian Gabalski, Hubertus Bromberger, Mark Brouard, Philip H. Bucksbaum, Taran Driver, Nagitha Ekanayake, Diksha Garg, Eva Gougoula, David Heathcote, Andrew J. Howard, Paul Hockett, David M. P. Holland, Sonu Kumar, Chow-shing Lam, Jason W. L. Lee, Joseph McManus, Jochen Mikosch, Dennis Milesevic, Russell S. Minns, Christina C. Papadopoulou, Christopher Passow, Weronika O. Razmus, Anja Röder, Arnaud Rouzée, Michael Schuurman, Alcides Simao, Albert Stolow, Atia Tul-Noor, Claire Vallance, Tiffany Walmsley, Daniel Rolles, Benjamin Erk, Michael Burt, Ruaridh Forbes   +36 more
doaj   +1 more source

Mechanistic Study of the Light‐Initiated Generation of Free Diazoalkanes: Towards Photo‐Orthogonal Synthesis

ChemistryEurope, EarlyView.
A combined computational and experimental study elucidates the mechanism of the light‐induced formation of free diazoalkanes in detail. Starting from deprotonated tosylhydrazone as the light‐harvesting species, it undergoes bond dissociation from a charge transfer state.
Ferdinand L. Pointner, Jonas Poll, Elina K. Taskinen, Vincent George, Tristan Ruff, Florian Rott, Gabriel Mayer, Niklas Gessner, Roger‐Jan Kutta, Burkhard König, Patrick Nuernberger, Christian Ochsenfeld, Regina de Vivie‐Riedle   +12 more
wiley   +1 more source

Photodissociation and the Morphology of HI in Galaxies

, 2004
Young massive stars produce Far-UV photons which dissociate the molecular gas on the surfaces of their parent molecular clouds. Of the many dissociation products which result from this ``back-reaction'', atomic hydrogen \HI is one of the easiest to ...
A Sternberg, AN Witt, BG Elmegreen, DA Smith, DJ Hollenbach, DJ Hollenbach, EJ Shaya, GB Field, J-M Deharveng, JE Pringle, JM Shull, L Vigroux, MG Wolfire, MG Wolfire, MJ Kaufman, O Laurent, R Braun, R Braun, RJ Allen, RJ Allen, RJ Allen, RJ Allen, RJ Allen, SC Madden, TP Stecher   +24 more
core   +2 more sources

Boron‐Doped Polycyclic Aromatic Hydrocarbons: Synthesis and Functional Properties

ChemistryEurope, EarlyView.
Herein, recent research on boron‐containing polycyclic aromatic hydrocarbons (B‐PAHs) is presented with particular emphasis on their synthesis. Covered compound classes include kinetically shielded, methylene‐tethered, and fully fused B‐PAHs as well as borata‐arenes and carbene‐stabilized B‐PAHs. In the last part, functional properties originating upon
Matthias Schnitzlein, Frank Würthner
wiley   +1 more source

Photodissociation of the OD radical at 226 and 243 nm [PDF]

, 2003
The photodissociation dynamics of state selected OD radicals has been examined at 243 and 226 nm using velocity map imaging to probe the angle–speed distributions of theD(2S) and O(3P2) products.
Chestakov, Dmitri A., Eppink, Andre T.J.B., Greenslade, Margaret E., Groenenboom, Gerrit G., Lester, Marsha I., Parker, David H., Radenovic, Dragana C., ter Meulen, J J., van der Loo, Mark P.J., van Roij, Andre J.A.   +9 more
core   +1 more source