Abstract:
Multiple dynamic libraries of compounds are generated when more than one reversible reaction comes into play. Commonly, two or more orthogonal reversible reactions are used, leading to non-communicating dynamic libraries which share no building blocks. Only a few examples of communicating libraries have been reported, and in all those cases, building blocks are reversibly exchanged from one library to the other, constituting an antiparallel dynamic covalent system. Herein we report that communication between two different dynamic libraries through an irreversible process is also possible. Indeed, alkyl amines cancel the dynamic regime on the nucleophilic substitution of tetrazines, generating kinetically inert compounds. Interestingly, such amine can be part of another dynamic library, an imine-amine exchange. Thus, both libraries are interconnected with each other by an irreversible process which leads to kinetically inert structures that contain parts from both libraries, causing a collapse of the complexity. Additionally, a latent irreversible intercommunication could be developed. In such a way, a stable molecular system with specific host-guest and fluorescence properties, could be irreversibly transformed when the right stimulus was applied, triggering the cancellation of the original supramolecular and luminescent properties and the emergence of new ones.
摘要:
当多于一个可逆反应开始起作用时,产生化合物的多个动态库。通常,使用两个或多个正交可逆反应,导致不共享构建块的非通信动态库。只报道了几个交流库的例子,在所有这些情况下,积木从一个图书馆可逆地交换到另一个图书馆,构成一个反平行的动态共价系统。在这里,我们报告说,通过不可逆的过程,两个不同的动态库之间的通信也是可能的。的确,烷基胺取消了四嗪亲核取代的动力学机制,产生动力学惰性化合物。有趣的是,这种胺可以是另一个动态库的一部分,亚胺-胺交换。因此,两个库通过不可逆的过程相互连接,从而产生包含两个库的部分的动力学惰性结构,导致复杂性的崩溃。此外,可以发展潜在的不可逆转的相互交流。以这样的方式,具有特定主客体和荧光性质的稳定分子体系,当施加正确的刺激时,可能会不可逆转地改变,引发了原有的超分子和发光特性的取消和新的发光特性的出现。