双发色团杂蒽染料分子内能量传递

Intramolecular Energy Transfer in Anthracene-Heteroatom-Containing-Anthracene Dyes

本文研究了甲基蒽为能量给体(D)以杂蒽染料作受体(A)的分子间和分子内的能量传递过程.得到了这些过程的物理特性常数,能量传递速率常数(k_ET),发生能量传递时D与A的平均间距(r),Forster距离(R_0),能量传递速率(E)等.结果表明:r值与分子模型实测值相比是允许的;E值一般在0.3左右,其效率不很高是由于D的发射光谱与A的吸收光谱之间重叠交盖不很理想所致;D与A之间只有单重态—单重态能量传递而没有三重态—三重态能量传递发生.

Anthracene-Heteroatom-containing anthrancene dyes have been synthesized. Intramolecular energy transfer between methylanthracene (MA) as a donor (D) and heteroatom-containing anthracene dyes as an acceptor (A) has been studied and the characteristic parameters were obtained, such as the constant of energy transfer (k_(ET)), the distance between the centers of donor and acceptor (r), Forster distance (R_(?)) and efficiency of energy transfer (E). The low efficiency (E～30%) may be attributed to the small overlap between MA's. emission spectrum and dye's absorption spectrum. Triplet energy transfer was not observed from the phosphorescence spectrum.