Engineering Hydrogen-Bonded Hexagonal Networks Built from Flexible 1,3,5-Trisubstituted Derivatives of Benzene

Crystalline supramolecular organic frameworks via hydrogen-bonding between nucleobases

We describe here the first crystalline hydrogen-bonded organic framework made from complementary guanine and cytosine nucleobases.

Channel Confinement of Aromatic Petrochemicals via Aryl-Perfluoroaryl Interactions With a B←N Host

We report channel confinement properties of an electron-deficient boron host derived from the orthogonal B←N interaction between a boronic ester and trans-pentafluorostilbazole. The boron host forms one-dimensional channels in the crystalline solid state when crystallized with common electron-rich aromatic petrochemicals (i.e., benzene, toluene, o-xylene) to form solvates and a cocrystal with stilbene. Molecular confinement of the electron-rich molecules in the solids is achieved through a combination of aryl-perfluoroaryl interactions (π-πF) and hydrogen bonds.

Functional materials based on molecules with hydrogen-bonding ability: applications to drug co-crystals and polymer complexes

The design, synthesis and property characterization of new functional materials has garnered interest in a variety of fields. Materials that are capable of recognizing and binding with small molecules have applications in sensing, sequestration, delivery and property modification. Specifically, recognition of pharmaceutical compounds is of interest in each of the aforementioned application areas. Numerous pharmaceutical compounds comprise functional groups that are capable of engaging in hydrogen-bonding interactions; thus, materials that are able to act as hydrogen-bond receptors are of significant interest for these applications. In this review, we highlight some crystalline and polymeric materials that recognize and engage in hydrogen-bonding interactions with pharmaceuticals or small biomolecules. Moreover, as pharmaceuticals often exhibit multiple hydrogen-bonding sites, many donor/acceptor molecules have been specifically designed to interact with the drug via such multiple-point hydrogen bonds. The formation of multiple hydrogen bonds not only increases the strength of the interaction but also affords unique hydrogen-bonded architectures.

Hydrogen-bonded organic frameworks: design, structures and potential applications

This paper highlights the current key progress on HOF-based materials, including their design, structural characteristics, and applications.

Porous Hydrogen-Bonded Organic Frameworks

Ordered porous solid-state architectures constructed via non-covalent supramolecular self-assembly have attracted increasing interest due to their unique advantages and potential applications. Porous metal-coordination organic frameworks (MOFs) are generated by the assembly of metal coordination centers and organic linkers. Compared to MOFs, porous hydrogen-bonded organic frameworks (HOFs) are readily purified and recovered via simple recrystallization. However, due to lacking of sufficiently ability to orientate self-aggregation of building motifs in predictable manners, rational design and preparation of porous HOFs are still challenging. Herein, we summarize recent developments about porous HOFs and attempt to gain deeper insights into the design strategies of basic building motifs.

Cyclometallated platinum(ii) and palladium(ii) complexes containing 1,5-diarylbiguanides: synthesis, characterisation and hydrogen bond-directed assembly

[M(ppy)(big)] (M = Pt(ii), Pd(ii), big = 1,5-diarylbiguanide) complexes are synthesised and their promise as tectons for hydrogen bond-directed assembly is explored.

Open network structures from 2D hydrogen bonded networks: diaminotriazyl tetraoxapentacenes

Crystals of 1 show two-dimensional hydrogen-bonded sheets that are prevented from packing closely by the large core, resulting in open network structures.

Controlling the distance between hydrogen-bonded chloro-s-triazine tapes: crystal engineering using N-alkyl chains and the influence of temperature

Precise control of tape spacing in hydrogen-bonded alkyl-chain substituted chloro-s-triazines is demonstrated at 150–298 K, with some unexpected behaviour from the odd-number carbon derivatives.