Synthesis of J-Aggregating Dibenz[a,J]anthracene-Based Macrocycles

被引:81
作者
Chan, Julian M. W.
Tischler, Jonathan R.
Kooi, Steve E.
Bulovic, Vladimir
Swager, Timothy M. [1 ]
机构
[1] MIT, Dept Chem, Cambridge, MA 02139 USA
基金
美国国家科学基金会;
关键词
ANTHRACENE-ACETYLENE OLIGOMERS; PERYLENE BISIMIDE DYES; CHEMISTRY; ABSORPTION; SUPERRADIANCE; CONSTRUCTION; AROMATICITY; CONVERSION; PORPHYRINS; FRAMEWORK;
D O I
10.1021/ja900382r
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Several fluorescent macrocycles based on 1,3-butadiyne-bridged dibenz[a,J]anthracene subunits have been synthesized via a multistep route. The synthetic strategy involved the initial construction of a functionalized dibenz[a,J]anthracene building block, subsequent installation of free alkyne groups on one side of the polycyclic aromatic framework, and a final cyclization based on a modified Glaser coupling under high-dilution conditions. Photophysical studies on three conjugated macrocycles revealed the formation of J-aggregates in thin films, as well as in concentrated solid solutions (polyisobutylene matrix), with peak absorption and emission wavelength in the range of lambda = 460-480 nm. The characteristic red-shifting of the J-aggregate features as compared to the monomer spectra, enhancement in absorption intensities, narrowed linewidths, and minimal Stokes shift values, were all observed. We demonstrate that improvements in spectral features can be brought about by annealing the films under a solvent-saturated atmosphere, where for the best films the luminescence quantum efficiency as high as 92% was measured. This class of macrocycles represents a new category of J-aggregates that due to their high peak oscillator strength and high luminescence efficiency have the potential to be utilized in a variety of optoelectronic devices.
引用
收藏
页码:5659 / 5666
页数:8
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