期刊
CHEMPLUSCHEM
卷 84, 期 9, 页码 1391-1395出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.201900266
关键词
alkynes; chromophores; cross-coupling; donor-acceptor compounds; fluorescence
We have prepared nine structural isomers of a tetrakis(arylethynyl)benzene chromophore functionalized with 4-butoxyphenyl and pyridyl units as the respective donor and acceptor units and examined their steady-state spectroscopic parameters to study how small structural variations effect the electronic absorption and emission spectra. Unlike their 4-dibutylaminophenyl congeners that exhibited dynamic hypsochromic or bathochromic shifts in response to Lewis and Bronsted acids, the current class of compounds simply showed quenched fluorescence upon protonation; only AlCl3 elicited a red-shifted fluorescence response. Computational studies of each system were also performed to provide additional insight into the energy levels and electronic transitions present.
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