Results 101 to 110 of about 2,475,342 (218)

Photodissociation dynamics of bromoiodomethane from the first and second absorption bands. A combined velocity map and slice imaging study

, 2018
Ion imaging is applied to disentangle the selective bond cleavage in the photodissociation of bromoiodomethane from the two first absorption bands.
Marggi Poullaín, Sonia, David V. Chicharro, Chicharro, David, Navarro, Eduardo, Rubio-Lago, Luis, Bañares Morcillo, Luis, Eduardo Navarro, Luis Rubio-Lago, Luis Bañares, González-Vázquez, Jesús, Sonia Marggi Poullain, Jesús González-Vázquez   +11 more
core   +1 more source

The Interstellar Medium in I Zw 18 Seen with JWST/MIRI. II. Warm Molecular Hydrogen and Warm Dust

The Astrophysical Journal
We present JWST/MIRI spectra from the Medium-resolution Spectrometer of I Zw 18, a nearby dwarf galaxy with a metallicity of ∼3% Solar. Here, we investigate warm molecular hydrogen, H _2 , observed in spectra extracted in ∼120 pc apertures centered on ...
L. K. Hunt, B. T. Draine, M. G. Navarro, A. Aloisi, R. J. Rickards Vaught, A. Adamo, F. Annibali, D. Calzetti, S. Hernandez, B. L. James, M. Mingozzi, R. Schneider, M. Tosi, B. Brandl, M. G. del Valle-Espinosa, F. Donnan, A. S. Hirschauer, M. Meixner, D. Rigopoulou   +18 more
doaj   +1 more source

Searching for the elusive CH2+ with the James Webb Space Telescope

Astronomy & Astrophysics
Context. Carbocations are key species in interstellar chemistry, providing entry points for building larger hydrocarbons. CH+, and more recently, CH3+, have been detected.
Zannese M., Coudert L. H., Dartois E., Dell’Ova P., Roncero O., del Mazo-Sevillano P., Jacovella U., Gans B., Goicoechea J. R., Van De Putte D., Boersma C., Habart E., Peeters E., Cami J., Chown R., Schroetter I., Kannavou O.   +16 more
doaj   +1 more source

Ligand‐Dependent Locally Excited and Charge‐Transfer Emission in Linear Copper(I) Mesoionic Carbene Luminophores

Advanced Optical Materials, Volume 14, Issue 37, 9 October 2026.
Ligand engineering enables precise control of emission in linear Cu(I) complexes by tuning donor–acceptor interactions between electron‐rich amines and π‐accepting mesoionic carbenes. Naphthyl‐substituted carbenes promote locally excited phosphorescence with vibronic structure, whereas electron‐rich amides combined with electron‐poor carbenes favor ...
Felix León, Changfeng Si, Chenfei Li, Adisak Thanetchaiyakup, Thomas V. Papineau, Denis Jacquemin, Eli Zysman‐Colman, Han Sen Soo   +7 more
wiley   +1 more source

Photodissociation dynamics of propionyl chloride in the ultraviolet region

The Journal of Chemical Physics, 2009
Velocity imaging technique combined with (2+1) resonance-enhanced multiphoton ionization (REMPI) is used to detect primary photodissociation of propionyl chloride. In one-color experiments at 235 nm, the Cl and Cl∗ fragments are produced rapidly, leading to a fraction of translational energy release of 0.37 and 0.35, anisotropy parameters of 1.1 and 0 ...
Wei, Z. R., Zhang, X. P., Lee, W. B., Zhang, B., Lin, K. C.   +4 more
openaire   +3 more sources

Ultrafast electron diffractive imaging of the dissociation of pre-excited molecules

Physical Review Research
Gas phase ultrafast electron diffraction (GUED) has become a powerful technique to directly observe the structural dynamics of photoexcited molecules.
Yanwei Xiong, Haoran Zhao, Sri Bhavya Muvva, Cuong Le, Lauren F. Heald, Jackson Lederer, Martin Centurion   +6 more
doaj   +1 more source

Multiscale Perspectives on Perovskite Instability: From Atomistic Deformation to Device Degradation in Perovskite Solar Cells

Advanced Energy Materials, Volume 16, Issue 39, 21 October 2026.
Multiscale perspectives on how excess charges in soft lead halide perovskites induce operational instability in photovoltaic devices are presented. Localized carriers formed under thermodynamic non‐equilibrium states modify atomistic interactions and drive lattice distortions, accelerating device degradation.
Joo‐Hong Lee, Donghyeon Lee, Seoyoon Lee, Jin‐Wook Lee, Mansoo Choi, Min‐cheol Kim, Namyoung Ahn   +6 more
wiley   +1 more source

Resolving dense photodissociation regions: The structure of photochemical fronts in three-dimensional gas distributions

Astronomy & Astrophysics
Context. For decades, the Orion Bar has been the prototypical photodissociation region (PDR). Viewed nearly edge-on, it offers a unique window into the stratified chemical structure of the atomic-to-molecular transition of the interstellar medium.
Gaches Brandt A. L., Bisbas Thomas G., Brendel Lothar, Zhu Zhengping   +3 more
doaj   +1 more source

Human erythroid models of sickle cell disease

HemaSphere, Volume 10, Issue 10, October 2026.
Abstract Sickle cell disease (SCD) is a group of severe inherited red blood cell disorders causing a major global healthcare burden. Despite recent advances in gene therapy and stem cell transplantation, treatment options remain very limited, highlighting the urgent need for the development of new therapeutic approaches.
Deborah E. Daniels, Maria A. Lizarralde‐Iragorri, Fatima O. Oyawoye, David C. Rees, Jan Frayne, Sara El Hoss   +5 more
wiley   +1 more source

Molecular Hydrogen Emission from Photodissociation Regions [PDF]

International Astronomical Union Colloquium, 1989
AbstractWe review new observational and theoretical developments of the understanding of the H2 infrared emission in the last 5 years since the discovery of the fluorescent emission in NGC 2023. An excitation analysis of H2 in a variety of Galactic sources has revealed that in many sources the excitation is expressed as a mixture of thermal and ...
openaire   +1 more source