학술논문
Highly Emissive π-Conjugated Alkynylpyrene Oligomers: Their Synthesis and Photophysical Properties.
Document Type
Article
Author
Source
Subject
*OLIGOMERS
*ABSORPTION
*ORGANIC synthesis
*FLUORESCENCE spectroscopy
*CHEMICAL reactions
*ORGANIC chemistry
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Language
ISSN
0022-3263
Abstract
We newly prepared para- and meta-linked alkynylpyrene oligomers and examined their photophysical properties. Oligomerization of monomeric building blocks was performed by Cu¹-promoted oxidative coupling reaction. The resulting oligomers mainly consist of 2-mer to 6-mer that were assigned on the basis of MALDI-TOF mass spectra, and the 2-mer, 3-mer, and 4-mer were isolated and fully characterized. From their absorption and fluorescence spectra, the para-Iinked oligomers were found to be somewhat π-conjugated compared with meta-linked ones, and the fluorescence quantum yields decreased with increasing oligomer length (Φf = 0.79-0.55). [ABSTRACT FROM AUTHOR]