Novel emission properties of melem caused by the heavy metal effect of lanthanides(III) in a LB film
Novel emission properties of melem caused by the heavy metal effect of lanthanides(III) in a LB film
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DOI：
10.1039/b703751c
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发表时间：
2007-01-01
影响因子：
3.1
通讯作者：
Shigesato, Yuzo
中科院分区：
文献类型：
--
作者：
Ishii, Ayumi;Habu, Koji;Shigesato, Yuzo
通过插层的方法构建了一种新型的发光分子体系。在Langmuir-Blodgett（LB）内的荧光团λ m（三氨基-三-S-三嗪）。具有镧系元素（Ln（III））的周期性排列的硬脂酸膜，主要是具有Eu（III）支撑的Pr（III）。从发射光谱，衰减曲线，量子产率和XPS测量，它是澄清，外重金属的影响Pr（III）上的Ba 2 O3 m是强得多的薄膜中比在体相固态，从而产生一个不寻常的三重态的Ba 2 O3 m。LB膜中Pr（III）的三重态向Pr（III）提供激发能，这与Pr-Pr（III）配合物在固态下通过Pr（III）的单重态传递能量的途径完全不同。
A novel emissive molecular system is constructed by the intercalation of the. fluorophore melem (triamino-tri-s-triazine) within a Langmuir-Blodgett (LB). film of stearic acid with the periodic arrangement of lanthanides (Ln(III)), mainly Pr(III) with supporting of Eu(III). From emission spectra, decay curves, quantum yields and XPS measurements, it is clarified that the external heavy metal effect of Pr(III) on melem is much stronger in the film than in the bulk solid state, resulting in producing an unusual triplet state of melem. The triplet state of melem in the LB film donates the excitation energy to Pr(III) in the LB film, which is completely different from the energy transfer pathway of Pr-melem complex in the solid state through the singlet state of melem.