Electron attachment to trinitrotoluene (TNT) embedded in He droplets: complete freezing of dissociation intermediates in an extended range of electron energies

被引：27

作者：

Mauracher, Andreas ^{[1
,2
]}

Schoebel, Harald ^{[1
,2
]}

da Silva, Filipe Ferreira ^{[1
,2
]}

Edtbauer, Achim ^{[1
,2
]}

Mitterdorfer, Christian ^{[1
,2
]}

Denifl, Stephan ^{[1
,2
]}

Maerk, Tilmann D. ^{[1
,2
]}

Illenberger, Eugen ^{[3
]}

Scheier, Paul ^{[1
,2
]}

机构：

[1] Univ Innsbruck, Inst Ionenphys & Angew Phys, A-6020 Innsbruck, Austria

[2] Univ Innsbruck, Ctr Mol Biosci Innsbruck, A-6020 Innsbruck, Austria

[3] Free Univ Berlin, Inst Chem & Biochem Phys & Theoret Chem, D-14195 Berlin, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 37期

关键词：

GAS-PHASE; HELIUM DROPLETS; ANIONS; CLUSTERS; CAPTURE;

D O I：

10.1039/b908192e

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：

Electron attachment to the explosive trinitrotoluene (TNT) embedded in Helium droplets (TNT@He) generates the non-decomposed complexes (TNT)(n)(-), but no fragment ions in the entire energy range 0-12 eV. This strongly contrasts the behavior of single TNT molecules in the gas phase at ambient temperatures, where electron capture leads to a variety of different fragmentation products via different dissociative electron attachment (DEA) reactions. Single TNT molecules decompose by attachment of an electron at virtually no extra energy reflecting the explosive nature of the compound. The complete freezing of dissociation intermediates in TNT embedded in the droplet is explained by the particular mechanisms of DEA in nitrobenzenes, which is characterized by complex rearrangement processes in the transient negative ion (TNI) prior to decomposition. These mechanisms provide the condition for effective energy withdrawal from the TNI into the dissipative environment thereby completely suppressing its decomposition.

引用

页码：8240 / 8243

页数：4

共 17 条

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