Gataullina K V, Ziganshin M A, Stoikov I I, Gubaidullin A T, Gorbatchuk V V
A.M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya 18, 420008 Kazan, Russia.
Phys Chem Chem Phys. 2015 Jun 28;17(24):15887-95. doi: 10.1039/c5cp02042e. Epub 2015 May 28.
A studied tert-butylthiacalix[4]arene derivative with four N-(2-acetoxyethyl)carbamoylmethoxy substituents on its lower rim in partial-cone configuration (calixarene 1) can remember its previous treatment in three essentially different ways by the formation either of a molecular glass or two metastable polymorphs after heating or the removal of an included guest molecule. Guest-induced memory is very selective with a polymorph created only after the release of a few included guests among a large series of those studied and is detected via an exothermic transition. Along with ordinary properties, like glass transition, curing and cold crystallization, the molecular glass from 1 is selective due to its ability to crystallize in solvent vapors and vapor mixtures over a well-defined concentration range. Being cooperative, this property may be used for the visual detection of ethanol content in water solution when it reaches a threshold value.
一种经过研究的杯[4]芳烃衍生物，其下边缘具有四个处于部分锥构型的N-(2-乙酰氧基乙基)氨基甲酰基甲氧基取代基（杯芳烃1），通过加热后形成分子玻璃或两种亚稳多晶型物，或者去除所包含的客体分子，它能够以三种本质上不同的方式“记住”其先前的处理过程。客体诱导的记忆具有很高的选择性，仅在一系列所研究的客体中释放少数几个所包含的客体后才会产生一种多晶型物，并通过放热转变来检测。除了玻璃化转变、固化和冷结晶等常规性质外，杯芳烃1形成的分子玻璃具有选择性，这是因为它能够在定义明确的浓度范围内的溶剂蒸气和蒸气混合物中结晶。这种性质具有协同性，当水溶液中的乙醇含量达到阈值时，可用于视觉检测乙醇含量。
