We describe the synthesis and energy-transfer characteristics of a [2.2]paracyclophane-based through-space-conjugated dimer consisting of two stacked π-electron systems. Photoexcited energy transfe...
[2.2]paracyclophane-based through-space conjugated polymers with fluorescence quenchers
作者:Yasuhiro Morisaki、Shizue Ueno、Yoshiki Chujo
DOI:10.1002/pola.26382
日期:2013.1.15
New [2.2]paracyclophane‐based through‐space conjugatedpolymers containing fluorescence quenchers such as anthraquinone and ferrocene units at the polymer termini were designed and synthesized. Their optical properties were investigated in detail. Fluorescence emission from the stacked π‐electron systems was effectively quenched by the stacked π‐electron systems at the polymer termini due to the energy
[2.2]Paracyclophane‐based through‐space conjugated oligomers and polymers were prepared, in which poly(p‐arylene–ethynylene) (PAE) units were partially π‐stacked and layered, and their properties in the ground state and excited state were investigated in detail. Electronic interactions among PAE units were effective through at least ten units in the ground state. Photoexcited energy transfer occurred
Toward molecular wires: The synthesis and energy‐transfer abilities of a [2.2]paracyclophane‐based through‐space conjugated dimer consisting of the two stacked π‐electron systems are described (see figure). Photoexcited energy transfer by the Förster mechanism occurred efficiently (ΦET>0.999) from the donor to acceptor π‐electron systems with a rate constant (kET) of 1012 s−1.