Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transoid-to-Cisoid Conformation Changes of Single Molecules on Surfaces
  Triggered by Metal Coordination   Conformational isomers are stereoisomers that can interconvert over low
potential barriers by rotation around a single bond. However, such bond
rotation is hampered by geometrical constraints when molecules are adsorbed on
surfaces. Here we show that the adsorption of
4,4'-bis(4-carboxyphenyl)-6,6'-dimethyl-2,2'-bipyridine molecules on surfaces
leads to the appearance of pro-chiral single-molecules on NiO(001) and to
enantiopure supramolecular domains on Au(111) surfaces containing the
$transoid$ molecule conformation. Upon additional Fe adatom deposition,
molecules undergo a controlled interconversion from a $transoid$ to $cisoid$
conformation as a result of coordination of the Fe atoms to the 2,2'-bipyridine
moieties. As confirmed by atomic force microscopy images and X-ray
photoelectron spectroscopy measurements, the resulting molecular structures
become irreversibly achiral.

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The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
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The categories of this paper are: math
20
The categories of this paper are: acc-phys