dimensional (2D) materials led by graphene and transition-metal dichalcogenides
exhibit unique physical properties dominated by their 2D honeycomb structures.
They have attracted intense interest because of their significance for both basic
science and potential applications. Inspired by the success of these systems,
designing new artificial honeycomb lattices is a rapidly expanding area of
research aimed at developing novel 2D materials with properties beyond those of
existing systems. The challenge is how to construct such structures,
particularly on length scales beyond the covalent bonds.
Wang’ group reported a 2D honeycomb superlattice via self-assembly of a planar
building block with well-controlled shape, containing two types of covalently
linked organo-functionalized inorganic clusters. Electron microscopy has
revealed single- and multilayer self-assembled sheets with a diversity of graphene-like
stacking modes, albeit on an order-of-magnitude larger length scale.
work had successfully constructed, through self-assembly, a mesoscale version
of graphene-like nano-honeycomb monolayers. Like graphene, they were found to
form bi- and tri-layers via different stacking modes. The successful generation
of a self-assembled mesoscale graphene-like structure promises further
developments of novel 2D materials with unique properties. The huge specific
area combined with porosity of such structures can ensure highly accessible
active sites and generate extremely high chemical affinity. The structure presented
here can be regarded as a truly 2D cluster-based metal−organic framework, an
emerging class of cluster-assembled materials with considerable potential for
applications such as in catalysis, sensors, electrochemistry, membranes, 2D
heterojunctions, and templated synthesis and as complex nanoreactors.
work was supported by the National Natural Science Foundation of China and Ministry
of Science and Technology of China and published in the international
well-known chemistry journal-Journal of the American Chemical Society as a