Site-selective bond scission of methylbenzoate following core excitation

2018 ◽  
Vol 20 (14) ◽  
pp. 9591-9599 ◽  
Author(s):  
Osamu Takahashi ◽  
Kuno Kooser ◽  
Dang Trinh Ha ◽  
Hanna Myllynen ◽  
Joakim Laksman ◽  
...  
Keyword(s):  
Photon Energy ◽  
Site Specificity ◽  
Core Excitation ◽  
Bond Scission ◽  
Site Selective

Relative ion yield of methylbenzoate depending on photon energy show site-specificity.

PHOTODEGRADATION OF POLY(TETRAFLUOROETHYLENE) AND POLY(VINYLIDENE FLUORIDE) THIN FILMS BY INNER SHELL EXCITATION

2002 ◽  
Vol 09 (01) ◽  
pp. 335-340 ◽  
Author(s):  
KOJI K. OKUDAIRA ◽  
HIROYUKI YAMANE ◽  
KAZUYUKI ITO ◽  
MOTOYASU IMAMURA ◽  
SHINJI HASEGAWA ◽  
...  
Keyword(s):  
Thin Films ◽  
Photon Energy ◽  
Polymer Chain ◽  
Mass Spectra ◽  
Vinylidene Fluoride ◽  
Time Of Flight ◽  
Bond Scission ◽  
Poly Vinylidene Fluoride ◽  
Ion Production ◽  
Ion Yields

Ion time-of-flight (TOF) mass spectra of poly(tetrafluoroethylene) (PTFE) and poly(vinylidene fluoride) (PVDF) thin films near fluorine and carbon K-edges were observed. For PTFE thin films, peaks corresponding to F +, CF +, and [Formula: see text] appeared, while for PVDF F + and H + were mainly observed. They indicate that for PTFE the polymer chain (C–C bonds) as well as C–F bonds are broken by irradiation of photons near fluorine and carbon K-edges, while for PVDF the bond scission occurs mainly at the C–F and C–H bond. Partial ion yields (PIY) of these ions for PTFE and PVDF thin films show strong photon energy dependencies near fluorine and carbon K-edges. The excitation from fluorine 1s to σ( C – F )* is specially efficient for F + ion production for both PTFE and PVDF.

Site selective dissociation of ozone upon core excitation

2007 ◽  
Vol 156-158 ◽  
pp. 245-249 ◽  
Author(s):  
A. Mocellin ◽  
M.S.P. Mundim ◽  
L.H. Coutinho ◽  
M.G.P. Homem ◽  
A. Naves de Brito
Keyword(s):  
Core Excitation ◽  
Selective Dissociation ◽  
Site Selective

Photon-energy dependence of single-photon simultaneous core ionization and core excitation inCO2

2016 ◽  
Vol 94 (1) ◽  
Author(s):  
S. Carniato ◽  
P. Selles ◽  
P. Lablanquie ◽  
J. Palaudoux ◽  
L. Andric ◽  
...  
Keyword(s):  
Energy Dependence ◽  
Photon Energy ◽  
Single Photon ◽  
Core Excitation

Active control of chemical bond scission by site-specific core excitation

2003 ◽  
Vol 528 (1-3) ◽  
pp. 242-248 ◽  
Author(s):  
Shin-ichi Wada ◽  
Ryohei Sumii ◽  
Kouji Isari ◽  
Satoshi Waki ◽  
Erika O. Sako ◽  
...  
Keyword(s):  
Chemical Bond ◽  
Active Control ◽  
Core Excitation ◽  
Site Specific ◽  
Bond Scission

Active control of site specificity in ion desorption by core excitation

2003 ◽  
Vol 199 ◽  
pp. 361-365 ◽  
Author(s):  
Shin-ichi Wada ◽  
Erika O. Sako ◽  
Ryohei Sumii ◽  
Satoshi Waki ◽  
Kouji Isari ◽  
...  
Keyword(s):  
Active Control ◽  
Site Specificity ◽  
Core Excitation ◽  
Ion Desorption

A quantitative approach to inner shell losses

1978 ◽  
Vol 36 (1) ◽  
pp. 526-527 ◽  
Author(s):  
R.D. Leapman ◽  
P. Rez ◽  
D.F. Mayers
Keyword(s):  
Energy Transfer ◽  
Cross Section ◽  
Cross Sections ◽  
Accurate Determination ◽  
Background Intensity ◽  
Core Excitation ◽  
Quantitative Basis ◽  
Cross Section Differential ◽  
Bound Electrons

Microanalysis by EELS has been developing rapidly and though the general form of the spectrum is now understood there is a need to put the technique on a more quantitative basis (1,2). Certain aspects important for microanalysis include: (i) accurate determination of the partial cross sections, σx(α,ΔE) for core excitation when scattering lies inside collection angle a and energy range ΔE above the edge, (ii) behavior of the background intensity due to excitation of less strongly bound electrons, necessary for extrapolation beneath the signal of interest, (iii) departures from the simple hydrogenic K-edge seen in L and M losses, effecting σx and complicating microanalysis. Such problems might be approached empirically but here we describe how computation can elucidate the spectrum shape.The inelastic cross section differential with respect to energy transfer E and momentum transfer q for electrons of energy E0 and velocity v can be written as

MEMORY EFFECTS IN THE FRAGMENTATION OF MOLECULES FOLLOWING SITE-SPECIFIC CORE EXCITATION

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-741-C9-744 ◽  
Author(s):  
W. HABENICHT ◽  
L. A. CHEWTER ◽  
M. SANDER ◽  
K. MÜLLER-DETHLEFS ◽  
E. W. SCHLAG
Keyword(s):  
Memory Effects ◽  
Core Excitation ◽  
Site Specific
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