Conducting metallophthalocyanine 2D covalent organic frameworks: the role of central metals in controlling π-electronic functions

Phthalocyanine covalent organic frameworks with different central metals are synthesized, and the AA-stacking structure of the 2D polymer sheets results in periodic phthalocyanine pi-columns. The central metals control the pi-electronic functions, including the improvement of light absorbance, the ease of carrier transport, and the photocurrent gain.