Institut für Ionenphysik und Angewandte Physik and Center of Molecular Biosciences Innsbruck, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria.
J Phys Chem A. 2010 Feb 4;114(4):1633-8. doi: 10.1021/jp909890h.
Electron attachment to formamide clusters in helium nanodroplets is reported for the first time. In contrast to the gas phase, parent anions are seen following low energy electron attachment to both the monomer and the small clusters. This is attributed to formation of dipole (or quadrupole) bound anions. In addition to the bare anions, the mass spectra also show the monomer and clusters with attached helium atoms. The affinity for attaching helium atoms strongly varies with cluster size; for example, the dimer anion is more than 10 times more likely to bind one or more helium atoms than the monomer. Possible binding sites for the helium atoms are discussed.
首次报道了氦纳米液滴中甲酰胺团簇的电子附加。与气相相反，在低能电子附加到单体和小团簇后，都可以看到母体阴离子。这归因于偶极（或四极）束缚阴离子的形成。除了裸露的阴离子外，质谱还显示了与氦原子附加的单体和团簇。与团簇尺寸强烈相关的氦原子的附着亲和力;例如，二聚体阴离子比单体更有可能结合一个或多个氦原子，可能性超过 10 倍。讨论了氦原子的可能结合位点。
