Results 61 to 70 of about 1,079,430 (204)

Coherent Stokes Raman Scattering for Simultaneous Measurement of CO2 and CH4 Temperatures

open access: yesJournal of Raman Spectroscopy, Volume 57, Issue 10, Page 1644-1653, October 2026.
A three‐beam hybrid fs/ps CSRS method is employed to excite the rovibrational transitions in the Fermi‐dyad of CO 2 and the v2 mode of CH 4. Time‐domain spectroscopic models are developed to extract the fuel and flame temperature profiles from experimental CH 4 and CO 2 spectra in a diffusion flame.
Alexander M. Warner   +3 more
wiley   +1 more source

Selective gating to vibrational modes through resonant X-ray scattering

open access: yesNature Communications, 2017
Investigating dynamics of polyatomic molecules is difficult as their potential energy surfaces are multidimensional due to coupled degrees of freedom. Here the authors demonstrate a spatial selective gating technique to probe the different vibrational ...
Rafael C. Couto   +14 more
doaj   +1 more source

Specificity of scattering of ultrashort laser pulses by molecules with polyatomic structure

open access: yesScientific Reports, 2022
The theory of scattering of ultrashort laser pulses (USP) is the basis of diffraction analysis of matter using modern USP sources. At present, the peculiarities of interaction of USP with complex structures are not well developed.
D. N. Makarov   +2 more
doaj   +1 more source

Reversible Hydration Tuning of Polar Order and Large Nonlinear Optical Response in a 2D van der Waals Crystal, LiInP2S6

open access: yesAdvanced Materials, Volume 38, Issue 52, 16 September 2026.
Hydration‐induced symmetry breaking transforms layered LiInP2S6${\rm LiInP}_2{\rm S}_6$ from a nonpolar to a chiral‐polar phase, producing a giant enhancement of non‐resonant second‐harmonic generation. The reversible tuning of polar order through molecular intercalation establishes a strategy for dynamically controlling nonlinear optical ...
Jadupati Nag   +8 more
wiley   +1 more source

On the determination of Lennard-Jones parameters for polyatomic molecules

open access: yes, 2022
Characterizing the key length and energy scales of intermolecular interactions, Lennard-Jones parameters, i.e., collision diameter and well depth, are prerequisites for predicting transport properties and rate constants of chemical species in dilute ...
Luo KH   +3 more
core   +2 more sources

Resonance in Interacting Induced-Dipole Polarizing Force Fields: Application to Force-Field Derivatives

open access: yesAlgorithms, 2009
The Silberstein model of the molecular polarizability of diatomic molecules, generalized by Applequist et al. for polyatomic molecules, is analyzed. The atoms are regarded as isotropically polarizable points located at their nuclei, interacting via the ...
Francisco Torrens, Gloria Castellano
doaj   +1 more source

Drug Delivery With Metal–Organic Frameworks

open access: yesAngewandte Chemie Novit, Volume 2, Issue 3, September 2026.
Metal–organic frameworks (MOFs) have recently entered human clinical trials for cancer radiotherapy, highlighting both the maturity and potential of MOFs as platforms for drug delivery. This minireview introduces the principles of MOF‐based drug delivery and discusses key opportunities and design challenges that will shape the next generation of these ...
Nathalie W. Tarabay   +6 more
wiley   +1 more source

Vibronic Interaction in Linear Polyatomic Molecules

open access: yes, 1969
This thesis deals with the weak interaction between the electronic and degenerate vibrational motions in linear polyatomic molecules. Second-order vibronic energy expressions are obtained for triatomic and tetratomic molecules in degenerate electronic ...
Kam, Kui-Ting
core   +1 more source

Negative Ions of Polyatomic Molecules

open access: yesEnvironmental Health Perspectives, 1980
In this paper general concepts relating to, and recent advances in, the study of negative ions of polyatomic molecules area discussed with emphasis on halocarbons. The topics dealt with in the paper are as follows: basic electron attachment processes, modes of electron capture by molecules, short-lived transient negative ions, dissociative electron ...
openaire   +2 more sources

Molecular filming: A director's grammar for visualizing chemistry in motion

open access: yesBulletin of the Korean Chemical Society, Volume 47, Issue 9, Page 1042-1057, September 2026.
Molecular filming names the practice, not just the product, of ultrafast structural science. In deliberate analogy to molecular editing, which rewrites connectivity in space, molecular filming records geometry in time, assembling time‐ordered structural frames into a movie of atomic motion and recasting the field as a grammar of directorial choices ...
Hyotcherl Ihee
wiley   +1 more source

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