Water-Soluble Cyclophanes Synthesized via the Zincke Reaction
作者:Lu Tong、Dingsheng Zhu、Binbin Chen、Yixin Chen、Guangcheng Wu、Fei Zeng、Hao Li
DOI:10.1021/acs.orglett.1c03154
日期:2021.12.17
By taking advantage of the Zinckereaction, we successfully synthesized three macrocycles, each of which contains two bipyridinium units as the electron acceptors. Two of them contain sp2-hybridized atoms exclusively in the ring frameworks, while the third contains two methylene units. The third macrocycle is able to form 1:1 inclusion complexes with guests of complementary sizes. A pair of isomers
depending on guest molecule polarity; DMF inclusioncrystals exhibited the highest fluorescenceintensity (ΦF=0.40), four times as high as that of a benzene inclusioncrystal (ΦF=0.10). According to systematic investigations of inclusion phenomena, strong host–guest interactions and filling of the inclusionspace led to a high fluorescenceintensity. Temperature‐dependent fluorescence spectral measurements