Columns designed from nanographenes

Graphene is a carbon materials that types extraordinarily skinny layers. Due to its uncommon properties, it’s fascinating for a lot of technical purposes. This additionally applies to polycyclic fragrant hydrocarbons (PAHs), which could be thought to be cut-outs of graphene. They’re thought-about promising supplies for natural photovoltaics or for field-effect transistors.

Massive, single-layer PAH molecules—sometimes called nanographenes—are nicely researched. In distinction, little is understood about PAHs organized into columnar multilayer stacks.

Focusing on multilayer nanographenes

Now a brand new method to those supplies is opening up: researchers from Julius-Maximilians-Universität Würzburg (JMU) in Bavaria, Germany, current a classy technique for designing exactly outlined, multilayered nanographenes within the journal Nature Chemistry.

“In our lab, we’ve synthesized a custom-made nanographene that’s outfitted with two cavities on each side of its planar core,” says Professor Frank Würthner, head of the JMU Centre for Nanosystems Chemistry. The cavities are shaped by the attachment of cumbersome substituents. In consequence, the nanographene can maintain a most of two smaller PAHs on its high and backside sides.

Of their experiments, the Würzburg chemists noticed that the nanographene shaped two- and three-layer PAH complexes in resolution. As well as, the staff was in a position to isolate pairs of those complexes as solids, i.e. as four- and six-layer PAHs, in addition to different multilayer compounds.

The structural particulars of those merchandise had been  confirmed by crystallographer Dr. Kazutaka Shoyama; doctoral college students Magnus Mahl and M.A. Niyas completed the synthesis, supramolecular binding research and quantum-chemical calculations.

Doable utility in photo voltaic cells

“Our idea for organizing multilayer nanographenes ought to be relevant to the design of purposeful natural supplies,” explains Professor Würthner. He says the technique of utilizing multilayer nanographenes for cost service technology in photo voltaic cells is promising.