THESIS
2017
xiv, 99 pages : illustrations (some color) ; 30 cm
Abstract
Two-dimensional (2D) metal–organic frameworks (MOFs) self-assembled at
solid-vacuum interfaces have attracted extensive attentions in last decade, owing to
their unique chemical and physical properties, for example, heterogeneous catalysis,
molecular magnetism, and selective host-guest binding. However, in contrast to the
abundantly reported transition metal coordinated MOFs, MOFs incorporating heavy
metals such as p-block or f-block metals are rarely reported. 2D-MOFs incorporating
heavy metals such as Pb have been theoretically predicted to exhibit non-trivial
topological phases originating from strong spin-orbital coupling (SOC) effect. This
prediction hints that the Pb-coordinated 2D metal–organic structures may represent a
new family of functional materials with appealing...[
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Two-dimensional (2D) metal–organic frameworks (MOFs) self-assembled at
solid-vacuum interfaces have attracted extensive attentions in last decade, owing to
their unique chemical and physical properties, for example, heterogeneous catalysis,
molecular magnetism, and selective host-guest binding. However, in contrast to the
abundantly reported transition metal coordinated MOFs, MOFs incorporating heavy
metals such as p-block or f-block metals are rarely reported. 2D-MOFs incorporating
heavy metals such as Pb have been theoretically predicted to exhibit non-trivial
topological phases originating from strong spin-orbital coupling (SOC) effect. This
prediction hints that the Pb-coordinated 2D metal–organic structures may represent a
new family of functional materials with appealing electronic and spintronic properties.
Experimental realization of these predicated structures is therefore highly desirable.
Lanthanide (Ln)-based 2D-MOFs exhibit versatile morphologies, owing to the
flexible coordination chemistry of Ln ions. In this regard, 2D-MOFs involved Ln
elements can be attractive due to high thermal stability, tunable pore size, chemical
sensing and potential application for heterogeneous catalysis. In this thesis, we
focused on the rational design and fabrication of 2D-MOFs containing heavy metals,
i.e., Pb and rare earth metal-Eu on noble metal substrates. We used scanning tunneling
microscopy (STM) to investigate the structures and self-assembly mechanism of these
systems at a single-molecular level.
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