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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Visualizing tilted binding and precession of diatomic NO adsorbed to Co-porphyrin on Au(111) using scanning tunneling microscopy

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Title
Visualizing tilted binding and precession of diatomic NO adsorbed to Co-porphyrin on Au(111) using scanning tunneling microscopy
Author(s)
Kim H.; Chang Y.H.; Lee S.H.; Lim S.; Noh S.K.; Yong-Hyun Kim; Kahng S.J.
Publication Date
2014-06
Journal
CHEMICAL SCIENCE, v.5, no.6, pp.2224 - 2229
Publisher
ROYAL SOC CHEMISTRY
Abstract
The axial bindings of diatomic molecules to metalloporphyrins play key roles in dynamic processes of biological functions. The basic knowledge of binding structures of NO adsorbed to Co-porphyrin remains unsettled; recent scanning tunneling microscopy showed center protrusion images, while X-ray diffraction and nuclear magnetic resonance spectroscopy revealed tilted binding structures of NO. Here we report high-resolution scanning tunneling microscopy images of NO adsorbed to Co-porphyrins which show perfect agreement with the latter. Upon NO exposure, three-lobed structures of Co-porphyrins were transformed to bright ring shapes on Au(111). With the help of density functional theory calculations, we reproduce the bright ring shapes in the simulated scanning tunneling microscopy image by considering tilted binding and precession motion of NO. Thus, our study directly visualizes the NO ligand of the NO-Co-porphyrin nitrosyl complexes that is tilted away from the axis normal to the porphyrin plane, and is undergoing precession. This journal is © the Partner Organisations 2014.
URI
https://pr.ibs.re.kr/handle/8788114/1188
ISSN
2041-6520
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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