Synthesis of light-harvesting dendrimers focally anchored with crown ethers or terpyridine ligands
作者:Yongchun Pan、Meng Lu、Zhonghua Peng、Joseph S. Melinger
DOI:10.1039/b307507a
日期:——
extenction coefficients and high fluoresence quantum yields. Coordination of crown ethers with alkali ions results in a significant increase in absorption strength in the UV range, but little alteration in either intensity or position of fluorescence emission. Coordination of terpyridine ligands with Ru2+, however, does efficiently quench the fluorescence from the dendrons,albeit only the smallest dendron
冠醚和吡啶吡啶配体已通过Pd催化的偶联反应成功连接到光收集苯乙炔单树枝状化合物的焦点上。这些功能性单树枝的结构通过1H和13C NMR光谱,质谱和元素分析进行了表征。这种结合配体锚定的树枝状分子显示出宽的吸收,大的摩尔延伸系数和高的荧光量子产率。冠醚与碱离子的配位会导致UV范围内的吸收强度显着提高,但荧光发射的强度或位置几乎没有变化。联吡啶配体与Ru2 +的配位可有效地猝灭树枝状分子的荧光,尽管只有最小的树枝状分子显示出有效的结合。