After the introduction of amino-ethyl-amino group between donor and acceptor, the styryl moiety of MTPABT-APyc, MTPADP-APyc and MTPABD-APyc still showed good planarity, in MTPAQL-APyc and MTPAPA-APyc molecules, due to the more complex structure of the heterocyclic moiety, the steric hindrance is larger, and a small dihedral angle appears. It should be noted that although the donor moiety was modified with a different heterocycle, the bond length of the acceptor moiety was almost unchanged, indicating that the insertion of the amino-ethyl-amino group disrupted the interaction between the donor and the acceptor. This will facilitate the construction of charge-separated dyes.