231613-67-5Relevant academic research and scientific papers
Self-decoupled porphyrin with a tripodal anchor for molecular-scale electroluminescence
Zhu, San-E.,Kuang, Yan-Min,Geng, Feng,Zhu, Jia-Zhe,Wang, Cong-Zhou,Yu, Yun-Jie,Luo, Yang,Xiao, Yang,Liu, Kai-Qing,Meng, Qiu-Shi,Zhang, Li,Jiang, Song,Zhang, Yang,Wang, Guan-Wu,Dong, Zhen-Chao,Hou
, p. 15794 - 15800 (2013)
A self-decoupled porphyrin with a tripodal anchor has been synthesized and deposited on Au(111) using different wet-chemistry methods. Nanoscale electroluminescence from single porphyrin molecules or aggregates on Au(111) has been realized by tunneling electron excitation. The molecular origin of the luminescence is established by the vibrationally resolved fluorescence spectra observed. The rigid tripodal anchor not only acts as a decoupling spacer but also controls the orientation of the molecule. Intense molecular electroluminescence can be obtained from the emission enhancement provided by a good coupling between the molecular transition dipole and the axial nanocavity plasmon. The unipolar performance of the electroluminescence from the designed tripodal molecule suggests that the porphyrin molecule is likely to be excited by the injection of hot electrons, and then the excited state decays radiatively through Franck-Condon π*-π transitions. These results open up a new route to generating electrically driven nanoscale light sources.
Size complementarity of macrocyclic cavities and stoppers in amide- rotaxanes
Heim, Christiane,Affeld, Ansgar,Nieger, Martin,Voegtle, Fritz
, p. 746 - 759 (2007/10/03)
New [2]rotaxanes were prepared by the threading and the slipping procedure, the latter having the advantage of not needing templating interactions. As a consequence, the first [2]rotaxane consisting of a tetraamide macrocycle and a pure hydrocarbon thread
