Magri David C, Coen Gregory D, Boyd Robert L, de Silva A Prasanna
School of Chemistry and Chemical Engineering, Queen's University, Belfast BT9 5AG, Northern Ireland, UK.
Anal Chim Acta. 2006 May 24;568(1-2):156-60. doi: 10.1016/j.aca.2005.11.073. Epub 2006 Jan 17.
A novel molecular AND logic gate 1 is demonstrated based on the competition between fluorescence and photoinduced electron transfer (PET). It is constructed according to a 'receptor2-spacer-fluorophore-spacer-receptor1-spacer-fluorophore-spacer-receptor2' format where receptor1 is a tertiary amine, receptor2 is a benzo-15-crown-5 ether and the fluorophore is an anthracene moiety, which are separated from each other by methylene spacers. The fluorescence response in methanol is significantly enhanced only when both H+ and Na+ are the inputs at high enough concentrations in accordance with AND logic. Cs+ behaves similarly to Na+, but with a lower fluorescence enhancement, whereas the other alkali metal cations are not effective. Electrospray ionization mass spectrometry provides evidence for formation of 1:1 and 1:2 (1:metal) complexes with alkali cations, and formation of a 1:2:1 (1:metal:proton) complex in the additional presence of acid.
基于荧光与光致电子转移（PET）之间的竞争，展示了一种新型分子与逻辑门1。它按照“受体2-间隔基-荧光团-间隔基-受体1-间隔基-荧光团-间隔基-受体2”的形式构建，其中受体1是叔胺，受体2是苯并-15-冠-5醚，荧光团是蒽部分，它们通过亚甲基间隔基彼此隔开。仅当H⁺和Na⁺在足够高的浓度下作为输入时，根据与逻辑，甲醇中的荧光响应才会显著增强。Cs⁺的行为与Na⁺相似，但荧光增强较低，而其他碱金属阳离子则无效。电喷雾电离质谱提供了与碱金属阳离子形成1:1和1:2（1:金属）配合物的证据，以及在额外存在酸的情况下形成1:2:1（1:金属:质子）配合物的证据。
