Efficient Fluorescence Quenching by Distant Production of a Free Electron

被引：17

作者：

Hans, Andreas ^{[1
,2
]}

Schmidt, Philipp ^{[1
,2
]}

Ozga, Christian ^{[1
,2
]}

Richter, Clemens ^{[3
,4
]}

Otto, Huda ^{[1
,2
]}

Holzapfel, Xaver ^{[1
,2
]}

Hartmann, Gregor ^{[1
,2
]}

Ehresmann, Arno ^{[1
,2
]}

Hergenhahn, Uwe ^{[3
,5
]}

Knie, Andre ^{[1
,2
]}

机构：

[1] Univ Kassel, Inst Phys, Heinrich Plett Str 40, D-34132 Kassel, Germany

[2] Univ Kassel, Ctr Interdisciplinary Nanostruct Sci & Technol CI, Heinrich Plett Str 40, D-34132 Kassel, Germany

[3] Leibniz Inst Surface Engn IOM, Permoserstr 15, D-04318 Leipzig, Germany

[4] Free Univ Berlin, Dept Phys, Arnimallee 14, D-14195 Berlin, Germany

[5] Max Planck Inst Plasma Phys, Wendelsteinstr 1, D-17491 Greifswald, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2019年 / 10卷 / 05期

关键词：

PENNING IONIZATION; CLUSTERS; VALENCE; DECAY;

D O I：

10.1021/acs.jpclett.9b00124

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Energy and charge transfer processes play an important role in many fundamental reactions in chemistry, biochemistry, and even technology. If an entity that is part of a larger system is photoexcited, its energy will dissipate, for example, by rearrangement of electron density in a large molecule or by photon emission (fluorescence). Here, we report the experimental observation of free electrons from a heterogeneous van der Waals cluster, in which some sites act as electron emitters receiving their energy efficiently from other "antenna" sites that are resonantly excited in the UV range. By complementing electron spectroscopy with fluorescence detection, we can directly observe that electron emission via this mechanism completely quenches fluorescence once the channel opens. We suggest this mechanism to be important for both quenching of fluorescence as well as resonantly enhancing free electron production in a variety of systems.

引用

页码：1078 / 1082

页数：9

共 26 条

[1] Valence and inner-shell spectroscopy on rare-gas clusters [J].