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We investigate an anthracene derivative, 3(5)-(9-anthryl) pyrazole (ANP),self-assembled on the Au (111) surface by means of scanning tunnelingmicroscopy (STM) and density functional theory (DFT) calculations. Achessboard-like network structure composed of ANP molecules is found, coveringthe whole Au (111) substrate. Our STM results and DFT calculations reveal thatthe formation of chessboard-like networks originates from a basic unit cell, atetramer structure, which is formed by four ANP molecules connected throughC-H-N hydrogen-bonds. The hydrogen bonds inside each tetramer and the molecularadsorption interaction are fundamentally important in providing a driving forcefor formation of the supramolecular networks.

Building the Chessboard-like Supramolecular Structure on Au (111) Surfaces