期刊
NATURE CHEMISTRY
卷 14, 期 4, 页码 457-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41557-021-00861-5
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资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [WU 317/20-2]
This study demonstrates the assembly of C-64 nanographene derivative with smaller PAHs into multilayer stacks and identifies dispersion forces as the main stabilizing factor for these complexes.
Polycyclic aromatic hydrocarbons (PAHs) show promise for applications in functional devices such as organic photovoltaics and field-effect transistors, but, although nanometre-sized PAHs-often referred to as nanographenes-have been well investigated as single-layer molecules, their multilayer counterparts remain rather unexplored. Here we show the assembly of a C-64 nanographene derivative (comprising a planar core decorated with four meta-terphenyl-imide moieties at its periphery) into multilayer stacks with smaller PAHs ranging from naphthalene to ovalene and hexabenzocoronene. The functionalized C-64 nanographene serves as a ditopic host that can accommodate a smaller PAH on either side of its planar core, in cavities delimited by its bulky imide substituents. Bilayers and trilayers (that is, complexes with 1:1 and 1:2 host:guest ratios, respectively) were observed in solution, and dimers of these complexes as well as multilayer compounds were isolated in the solid state. Quantum-chemical calculations indicate that dispersion forces are the main stabilizing factor for these complexes.
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