Fabrication and fluorescence properties of perylene bisimide dye aggregates bound to gold surfaces and nanopatterns
作者:Ulrike Haas、Christoph Thalacker、Jörg Adams、Jürgen Fuhrmann、Silke Riethmüller、Uwe Beginn、Ulrich Ziener、Martin Möller、Rainer Dobrawa、Frank Würthner
DOI:10.1039/b210423g
日期:2003.3.19
Perylene bisimide dyes with two different imide substituents have been synthesized by sequential imidization reactions to give the disulfide 8 bearing two perylene bisimide dyes. Aggregation properties of this bis-perylene dye were studied by UV/Vis absorption and steady-state polarization-dependent as well as time-resolved fluorescence spectroscopy and the results were compared to those of the symmetrical perylene bisimide dye 4. In both cases, aggregation is expressed in a strong bathochromic shift of the excitation and the emission spectra and increasing concentration results in an increase in lifetime from 5 to 8 ns. By means of the thiol linker, self-assembly of 8 on gold surfaces was accomplished leading to surface-bound dye aggregates. Intense fluorescence from these dye aggregates was observed on surfaces decorated with hexagonal gold patterns, whereas the fluorescence is only weak on plain gold substrates.
通过连续的酰亚胺化反应合成了具有两种不同酰亚胺取代基的双亚苝染料,得到了含有两种双亚苝染料的二硫化物 8。通过紫外/可见吸收、稳态偏振依赖性和时间分辨荧光光谱法研究了这种双亚苝染料的聚集特性,并将研究结果与对称的亚苝双亚胺染料 4 的聚集特性进行了比较。在这两种情况下,聚集都表现为激发光谱和发射光谱的强烈浴色偏移,浓度的增加会导致寿命从 5 毫微秒延长到 8 毫微秒。通过硫醇连接剂,8 在金表面上实现了自组装,形成了表面结合染料聚集体。在装饰有六角形金图案的表面上,可以观察到这些染料聚集体发出的强烈荧光,而在普通金基底上,荧光很弱。