Atom-selective bond breaking in a chemisorbed homonuclear molecule induced by core excitation:: N2/Ru(001)

被引：47

作者：

Romberg, R ^{[1
]}

Heckmair, N

Frigo, SP

Ogurtsov, A

Menzel, D

Feulner, P

机构：

[1] Tech Univ Munich, Phys Dept E 20, D-85747 Garching, Germany

[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[3] Verkin Inst Low Temp Phys & Engn, UA-31064 Kharkov, Ukraine

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.84.374

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe photochemical selectivity for N 1s to pi* excitations of chemisorbed N-2. By narrow bandwidth synchrotron radiation we selectively excite one of the two atoms of the molecule. Photon stimulated desorption of neutral N atoms predominates for excitations of the N atom close to the surface, whereas excitation of the outer atom ejects predominantly N-2(0) and small amounts of N+, demonstrating the predominant breaking of the inner or outer bond, respectively, of the N-2 adsorbate. Analysis on the basis of previously obtained decay electron spectra after atom-selective excitation can explain the mechanism of localized bond breaking.

引用

页码：374 / 377

页数：4

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