Molecular Implementation of Sequential and Reversible Logic Through Photochromic Energy Transfer Switching
作者:Patricia Remón、Martin Hammarson、Shiming Li、Axel Kahnt、Uwe Pischel、Joakim Andréasson
DOI:10.1002/chem.201100027
日期:2011.5.27
fluorescence switching through modulation of energy transfer. The dyads were designed in such a way that energy transfer is only observed for the open forms of the photochrome (merocyanine and protonated merocyanine), whereas the closed spiropyran is inactive as an energy acceptor. This was made possible through a deliberate choice of fluorophores (4‐amino‐1,8‐naphthalimide, dansyl, and perylene) that produce
研究了用荧光团修饰的光致变色螺吡喃作为分子平台,通过调节能量转移实现了荧光转换。设计二元组的方式是,仅在开放形式的光致变色剂(硫氰酸和质子化的花菁)中观察到能量转移,而封闭的螺吡喃却没有作为能量受体的活性。通过精心选择的荧光团(4-氨基-1,8-萘二甲酰亚胺,丹磺酰基和per),可以实现与螺环形式的零光谱重叠和对于花菁形式的相当大的重叠,从而使之成为可能。根据福斯特理论,能量传递被认为是高效的,在某些情况下是100%的效率。光子的组合开关(λ光> 530 nm)和化学(基本)输入可创建顺序逻辑设备,这是键盘锁的基本元素。此外,结合基于蒽的酸性变色荧光开关,设计了一种可逆逻辑器件。这样就可以通过多色荧光信号对不同的输入组合进行明确的编码。可以方便地将所有设备重置为其初始状态并重复循环。