Metal-organic frameworks (MOFs) give the opportunity of confining guest molecules into their pores even by ap ost-synthetic protocol. PUM168 is aZ n-based MOF characterized by microporous cavities that allows the encapsulation of asignificant number of guest molecules.The pores engineered with different binding sites show aremarkable guest affinity towards as eries of natural essential oils components, such as eugenol, thymol and carvacrol, relevant for environmental applications.Exploiting single crystal X-raydiffraction, it was possible to step-wisely monitor the rather complex threecomponents guest exchange process involving dimethylformamide (DMF,t he pristine solvent) and binary mixtures of the flavoring agents.Apicture of the structural evolution of the DMF-to-guest replacement occurring inside the MOF crystal was reached by adetailed single-crystal-to-single-crystal monitoring. The relation of the supramolecular arrangement in the pores with selective guests release was then investigated as afunction of time and temperature by static headspace GC-MS analysis.

Metal-organic frameworks (MOFs) give the opportunity of confining guest molecules into their pores even by ap ost-synthetic protocol. PUM168 is aZ n-based MOF characterized by microporous cavities that allows the encapsulation of asignificant number of guest molecules.The pores engineered with different binding sites show aremarkable guest affinity towards as eries of natural essential oils components, such as eugenol, thymol and carvacrol, relevant for environmental applications.Exploiting single crystal X-raydiffraction, it was possible to step-wisely monitor the rather complex threecomponents guest exchange process involving dimethylformamide (DMF,t he pristine solvent) and binary mixtures of the flavoring agents.Apicture of the structural evolution of the DMF-to-guest replacement occurring inside the MOF crystal was reached by adetailed single-crystal-to-single-crystal monitoring. The relation of the supramolecular arrangement in the pores with selective guests release was then investigated as afunction of time and temperature by static headspace GC-MS analysis.

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