2-脲基-41氢-嘧啶酮四氢键萘-蒽超分子组装体系:'通过键'机制的单重态能量传递

摘要

A relative rigid naphthalene-anthracene supramolecular ensemble has been designed and synthesized via 2-ureido-4[1H]-pyrimidinone quadruple hydrogen-bonded module. Steadystate and time-resolved fluorescence profiles demonstrate that the singlet-singlet energy transfer occurs effectively from naphthalene to anthracene moieties in ensemble UPNa · UPAn.The rate constant and efficiency for photoinduced energy transfer in ensemble UPNa · UPAn is much greater than that of theoretical calculation through F(O)rster mechanism. Therefore, the singlet-singlet energy transfer process takes place via F(O)rster mechanism and “through AADD quadruple hydrogen bond” mechanism in this ensemble.%设计合成了基于2-脉基-4[1氢]-嘧啶酮AADD四氢键萘-葱超分子组装体系UPNa·UPAn.稳态和时间分辨荧光光谱研究表明UPNa·UPAn四氢键组装体可以发生从茶到葱的高效、快速的单重态能量传递过程.体系内光诱导单重态能量传递的速度和效率远大于通过F(o)rster机制的单重态能量传递速率,表明组装体系UPNa·UPAn中茶向葱的光诱导单重态能量传递是经由体系内的F?rster和"通过AADD四氢键"的超交换机制发生的.