School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel.
Org Lett. 2020 Dec 18;22(24):9706-9711. doi: 10.1021/acs.orglett.0c03764. Epub 2020 Dec 7.
Conjugated 5,5'-Bicalixarene scaffolds having fluorophores at the chain termini have been prepared and tested in the supramolecular detection of nitric oxide. Scaffolds bearing electron-rich fluorophores demonstrated a stronger turn-off response to the presence of NO than the fluorophore-free analogue in both organic and aqueous media, while no fluorescence quenching happened when the electron-deficient fluorophores were employed. Unprecedented ratiometric supramolecular sensing was observed when fluorophores of the opposite electronic demands were placed at the scaffold's termini.
具有链端荧光团的共轭 5,5'-双倍半硅氧烷支架已被制备并用于检测一氧化氮的超分子检测。在有机和水相介质中，带有富电子荧光团的支架对 NO 的存在表现出比无荧光团类似物更强的关闭响应，而当使用缺电子荧光团时则没有发生荧光猝灭。当将具有相反电子需求的荧光团置于支架的末端时，观察到前所未有的比率型超分子传感。
