Engineering organic/inorganic diols that reversibly capture and release volatile guests

Triarylcarbinol derivatives barter intermolecular interactions to accommodate substituents and create polymorphs

“…These considerations can be useful in view of an application of the pyridine derivatives as ligands in the design of organic/ inorganic networks, 1,2,26,27 since in that case the pyridine acceptor is employed in the coordination bond, and the packing relies on the association propensity of the other functional groups.…”

“…Currently, we are aiming to design new organic-inorganic hybrid crystals capable of hosting and releasing small guests via reversible solid-gas processes based on a soft rearrangement of the crystal packing in response to the presence of a suitable guest. 1,2 These materials are assembled by coordinating two a-(4-pyridyl)benzhydrol (LOH) ligands 3 (Scheme 1) to a central transition metal, thus obtaining organic/inorganic diols which combine the molecular recognition patterns of the triaryl carbinol ends with the stereochemical information encoded by the metal centre.…”

A discussion on the solid state organization of 4-pyridyl imino compounds and on the co-crystallization between their molecular precursors

“…4 Recently, we have been particularly interested in the realization of organicinorganic systems able to capture and to release reversibly small guests, and we have shown that the size and shape of the organic ligands are crucial in determining the inclusion propensity of these materials. 5,6 In this perspective we aim to realize new ligands with tunable size and shape for the synthesis of wheeland-axle hybrid metallo-organic diols with potential chlathrating properties. Previous works have shown that pyridineoximes are building blocks well suited for the synthesis of hybrid organicinorganic materials, due to the consistency in their hydrogen bond interactions.…”

Concomitant polymorphism and twinning of dichloro-bis(η5-tert-butylcyclopentadienyl)titanium(IV)

“…The molecular symmetry evaluations and exact refinement procedures are also discussed. We are interested in the design of hybrid organic-inorganic wheeland-axle systems (waad) with flexible dynamic frameworks that can create pores "on demand " to accomodate small guest molecules [1][2][3]. A reversible dynamic reorganization between the waad nonsolvate and solvate phases requires two conditions: (i) a low cost structural rearrangement between two states represented by the initial close (self-mediated)and the final open (guest-mediated) host frameworks, (ii) an easily accessible migration path for the outcoming and incoming guest molecules.…”

“…A reversible dynamic reorganization between the waad nonsolvate and solvate phases requires two conditions: (i) a low cost structural rearrangement between two states represented by the initial close (self-mediated)and the final open (guest-mediated) host frameworks, (ii) an easily accessible migration path for the outcoming and incoming guest molecules. Palladium complexes of triarylcarbinol ligands have shown suitable structural requisites to give reversible host-guest properties [2,3]. New iminic ligands designed on this basis result very promising promoters of potentially bistable supramolecular architectures based on metallo-organic supramolecular building units as wide as 40 Å (Figure).…”