Every year millions of tons of zeolites are produced, being used as molecular sieves, hydrocracking catalysts, gas-capture materials and for emerging novel applications. There is a demand to synthesise new zeolites with bespoke frameworks, which are tailor-made for a chosen application. To achieve these ‘designer zeolites’ it is crucial to fully understand the host-guest interactions between organic additives and zeolitic frameworks. Here we have studied four different zeolites, synthesised with the same organic additive, 18-crown-6 ether, which show observable differences in the host-guest interactions. We demonstrate that the framework geometry dominates the decomposition temperature, enthalpy and mechanism. The zeolites show unique decomposition features, emphasising experimental differences in how the organic additive and framework interact.

每年生产数百万吨的沸石，被用作分子筛，加氢裂化催化剂，气体捕获材料并用于新兴的新应用。需要使用定制框架来合成新的沸石，这些框架是为选定的应用量身定制的。为了获得这些“设计师沸石”，至关重要的是要充分了解有机添加剂与沸石骨架之间的主客体相互作用。在这里，我们研究了四种由相同的有机添加剂18冠6醚合成的不同沸石，它们在主体与客体的相互作用中显示出可观察到的差异。我们证明框架的几何形状支配着分解温度，焓和机理。沸石表现出独特的分解特征，强调了有机添加剂和骨架相互作用的实验差异。