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Design and characterization of diamondoid covalent assemblies

Diamondoid compounds can find applications in various fields, especially as scaffolds in nanomaterial design. Diamondoid covalent assemblies are especially promising derivatives that typically consist of several diamondoid cage subunits connected with a heteroatom or a functional group. We recently prepared and fully characterized such compounds that had an ether linker in order to test their self-assembly capabilities on surfaces.[1, 2] Their unambiguous characterization was achieved using NMR and was made easier due to their inherent high symmetry. On the other hand, structural assignment of their on-surface self- assemblies is challenging due to their non-planar nature so spatial identification was accomplished using a combination of microscopy and computational tools. Spontaneous self-assembly of such systems is predominately governed by London dispersion interactions (Figure 1). In order to gain more insight into the nature of the agglomeration process, we also studied their arrangement in helium nanodroplets, which is an environment suitable for characterizing weakly-bound supramolecular clusters.[3, 4] Deeper understanding of the forces governing the self-organization of diamondoid covalent assemblies opens a way to their tailored design and further application as building blocks in nanotechnology.

Diamondoid compounds ; Nanomaterial design ; NMR characterization

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