Figure 4. The structural patter of the new 2D carbon crystal prepared from 1,3,5-trihydroxybenzene.

The 2D carbon crystal consists of 4-carbon rings and 6-carbon rings in ratio 1:1. The side lengths of the six-carbon rings are around 1.42~1.46 Å, and the two bonds, joining the two six-carbon rings, are around 1.50~1.52 Å. In the 2D carbon crystal dodecagon holes with diameter around 5.8 Å are regularly located. The 2D carbon crystal has two types of edge structural patterns. In one edge pattern the grooves are separated by six-ring spur; and in the other pattern the grooves are separated by spur of (6C-ring)-(4C-ring)-(6C-ring).