Publication

Isomer specific spectroscopy of metal clusters trapped in a matrix: Ag9

Christian Felix, Wolfgang Harbich, Christoph Sieber
2004
Journal Articles

Abstract

Clusters of metal atoms at a fixed size can assume different structural arrangements, known as isomers, which may have nearly the same energy. Therefore at given experimental conditions distribution of these isomers can be present. While the size selection is a relatively common technique, the isomer selection is not; it is therefore more difficult to obtain information about a single isomer. We report here on isomer specific spectroscopy of Ag9 clusters together with ab initio calculations allowing to identify the isomer responsible for the measured excitation pattern and fluorescence.

Official source

https://infoscience.epfl.ch/entities/publication/0bc336d8-7975-49ff-a0bd-11aaa7de6bc5

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Christian Felix, Wolfgang Harbich, Christoph Sieber
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/0bc336d8-7975-49ff-a0bd-11aaa7de6bc5

About this result

Related concepts (32)

Chirality (chemistry)

In chemistry, a molecule or ion is called chiral (ˈkaɪrəl) if it cannot be superposed on its by any combination of rotations, translations, and some conformational changes. This geometric property is called chirality (kaɪˈrælɪti). The terms are derived from Ancient Greek χείρ (cheir) 'hand'; which is the canonical example of an object with this property. A chiral molecule or ion exists in two stereoisomers that are mirror images of each other, called enantiomers; they are often distinguished as either "right-handed" or "left-handed" by their absolute configuration or some other criterion.

Cis–trans isomerism

Cis–trans isomerism, also known as geometric isomerism or configurational isomerism, is a term used in chemistry that concerns the spatial arrangement of atoms within molecules. The prefixes "cis" and "trans" are from Latin: "this side of" and "the other side of", respectively. In the context of chemistry, cis indicates that the functional groups (substituents) are on the same side of some plane, while trans conveys that they are on opposing (transverse) sides.

Directional selection

In population genetics, directional selection, is a mode of negative natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype. Under directional selection, the advantageous allele increases as a consequence of differences in survival and reproduction among different phenotypes. The increases are independent of the dominance of the allele, and even if the allele is recessive, it will eventually become fixed.

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Isomer specific spectroscopy of metal clusters trapped in a matrix: Ag9

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