Conjugated macrocycles on planar chiral 2,2paracyclophane

2,2Paracyclophane (2,2PCP) with unique three dimensional rigid structure and planar chirality has wide applications in material science．As an ideal building block to construct conjugated macrocycles, 2,2PCP could introduce intriguing properties for macrocycles including chirality and topological structure．Recent progress on macrocycles based on 2,2PCP scaffold are summarized in this review．Featured properties and planar chirality of 2,2PCP are discussed．Conjugated macrocycles based on 2,2PCP are classified into two types of helical oligothiophenes macrocycles and conjugated carbon macrocycles．Some of the macrocycles show bright circularly polarized luminescence with large glum values．