On-surface coordination chemistry: direct imaging of the conformational freedom of an axial ligand at room temperature.
نویسندگان
چکیده
The on-surface ligation of nitric oxide (NO) with Co-tetraphenylporphyrin (CoTPP) sublimed onto oxygen-reconstructed Ni(001) is studied using room-temperature scanning tunneling microscopy (STM) and complementary photoemission spectroscopies. On the oxygen-reconstructed substrates, the porphyrins are observed to form well-ordered, self-assembled layers. STM directly images the NO ligand as a characteristic feature in the center of the molecule. Under certain STM imaging conditions the dynamicity of this feature can be related to the temperature-activated conformational flexibility of the NO ligand. This provides an indirect confirmation of the bending of the Co-NO bond, as predicted from classical coordination chemistry.
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عنوان ژورنال:
- Physical chemistry chemical physics : PCCP
دوره 15 39 شماره
صفحات -
تاریخ انتشار 2013