Synthesis and Isolation of a Homochiral Nanohoop Composed of a Trogers Base and Hexaparaphenylene

The synthesis of a new nanohoop containing a stereogenic Troger ' s base skeleton tethered to a curved hexaparaphenylene ([6]CPP) is reported. The TB[6]CPP nanohoop possesses a stable C-2 symmetrical structure, which promotes the allowed transition that gives rise to pale blue emission with a quantum yield of similar to 0.69, surpassing the value of the more symmetrical [8]CPP. Moreover, TB[6]CPP shows chiroptical properties including circular dichroism and circularly polarized luminescence with a moderate dissymmetry factor (jglum j) of similar to 2.1x10(-3)