π-Conjugated molecules and polymers have shown a lot of potential in a broad range of electronic, photonic, spintronic, sensing and biomedical applications. Their properties depend on our ability to control their structure, π-conjugation and intermolecular organization, which is intimately related to their optical, electronic, and magnetic properties. This Symposium will focus on the most recent advances on the design, synthesis and properties of planar and distorted π-conjugated systems that extend on 1D, 2D and 3D.