Polyfluorinated hydroxy and carboxy benzenes as a new type of H-donors for self-assembly with 18-crown-6 ether: Synthesis, supramolecular structure and stability of co-crystals

Polyhalogenated aminobenzonitrilesvs.their co-crystals with 18-crown-6: amino group position as a tool to control crystal packing and solid-state fluorescence

“…Thermocycling of A 2 •cr and D 2 •cr leads to quite noticeable changes in the thermal effect in the second melt. However, such differences in the DSC parameters of co-crystals upon thermocycling were observed in some cases 16,17,73 and appear to be caused by normalization or quenching of the sample without any change in the crystal structure. In particular, crystallographic data obtained 16 on the A 2 •cr single crystals prepared from a solution and from a melt indicate the identity of the crystal structure despite the large differences in the thermal characteristics.…”

How does the combination of the nitro group and fluorine atoms affect the (co)crystallization behaviour of arylenediamines?

“…An illustrative example is the co-crystallization of polyhalogenated arenes having a H-donor function (amines, alcohols, acids) and macrocyclic ether 18crown-6. [12][13][14][15] It was established that certain structural fragments of the aromatic co-former control the stoichiometry and supramolecular structure of the co-crystals. The H-donor co-former and crown ether in the co-crystals are connected via an intermolecular H-bond X-H⋯O cr (X = O, N), or its water-mediated analogue O-H⋯O(H)-H⋯O cr , which is the only structure-directing interaction in co-crystals of 1 : 1 stoichiometry.…”

“…The H-donor co-former and crown ether in the co-crystals are connected via an intermolecular H-bond X-H⋯O cr (X = O, N), or its water-mediated analogue O-H⋯O(H)-H⋯O cr , which is the only structure-directing interaction in co-crystals of 1 : 1 stoichiometry. [12][13][14] The key factor determining the diversity of the co-crystallization patterns is the ability of aromatic coformers to form strong intermolecular interactions that compete with this H-bond and enable self-assembly of rather complex supramolecular structures (Fig. 1).…”

The Synthesis, Structure, and Dielectric Properties of a One-Dimensional Hydrogen-Bonded DL-α-Phenylglycine Supramolecular Crown-Ether-Based Inclusion Compound

“…Given that supramolecular materials are predisposed to the formation of stable novel structures and molecular aggregates of specific functions, their diverse hybrid assemblies of functional units tend to form complex order-disorder states, which can give rise to anomalies in optical, electrical, thermal, magnetic, and other physical properties of the resulting materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Therefore, achieving the functional diversification and coupling of supramolecular material systems has become a research hotspot, especially in the fields of crystal engineering, nonlinear optics, and hybrid materials [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”