Covalently adsorbing COC to the BPN sheet affects the electronic structure of the material as shown in the EBS (Figure ). COC introduces a defect state between the X and M points at the Fermi level at lower concentrations (A) resulting in a small gap of 0.032 eV (Figure The type II Dirac cone is affected by a COC state as well. At a coverage of 0.25, it disappears once both 6-4 rows are occupied. This is the case for B (Figure right) and C (Figure ). The type II Dirac cone is retained in D (Figure ), since there are alternating functionalized and unfunctionalized 6-4 rows. As a consequence of this observation, the Dirac cone has to result from energy dispersion within the 6-4 row. This facilitates anisotropic charge transfer because of the type-II Dirac cone with a direction dependency. Consequently, chemical functionalization significantly alters the materials properties, depending on the coverage and adsorption sites.