Photo-induced energy transfer and its switching in dyad and triad chromophore systems composed of coumarin, Ru(ii) and Os(ii) terpyridine-type complexesElectronic supplementary information (ESI) available: 1H NMR and ES mass spectra of the new dyad and triad coumarin-containing complexes, (C151)2-Os, (C151)2-Ru-ph-Os and (C151)2-Ru-azo-Os and the emission spectra of (C151)2-tpy and (C151)2-Os. See http://www.rsc.org/suppdata/dt/b2/b212274j/
作者:Tetsuo Akasaka、Toshiki Mutai、Joe Otsuki、Koji Araki
DOI:10.1039/b212274j
日期:2003.4.4
coumarin, Ru(II) and Os(II) terpyridine-type complexes were synthesized. The dyad is composed of coumarin and Os(II) units, while the triads are composed of coumarin, Ru(II) and Os(II) units. One of the triads has a phenylene spacer to connect the Ru(II) unit and the Os(II) unit, while the other has an azo moiety. Energy transfer in these multichromophoric systems has been probed by electronic absorption
一个新的二元组和两个三元组 发色团 含化合物 香豆素合成了Ru(II)和Os(II)三联吡啶类复合物。二元组由香豆素和Os(II)单位,而三合会则由香豆素,Ru(II)和Os(II)单位。其中一个三合会有一个亚苯基连接Ru(II)单元和Os(II)单元的垫片,而另一个具有一个偶氮部分。这些多发色体系中的能量转移已通过电子吸收和发光光谱。已经研究了在后一个三元组中由氧化还原刺激引起的光诱导能量转移的转换行为。光物理和电化学分析 表示能量传递的贡献来自 香豆素 发色团在“接通状态”下,Ru(II)中心相对于以Os(II)为中心的发射估计约为70%。此贡献大于先前报告的Ru(II)/ Os(II)二聚体系统中的40%。因此,可以得出结论,在这种新的三单元组生色团系统中,已经实现了从香豆素部分到Os(II)中心的定向能量转移的改进转换。