Supramolecular Assembly and Solid State Chemistry

Molecular Packing Dependent Solid State Fluorescence Response of Supramolecular Metal–Organic Frameworks: Phenoxo-Bridged Trinuclear Zn(II) Centered Schiff Base Complexes with Halides and Pseudohalides

“…Polynuclear transition metal complexes with salen-type ligands have also been extensively studied as luminescent materials besides organic salts. Salen-type ligands have been proven to be very effective in constructing supramolecular architectures with copper, zinc, and other d- and f-block metal ions. − The anions used, either as terminal or as bridging ligands, alter the chemistry of the complex to a great extent and affect their supramolecular assembly in the solid state . The cationic fluorogens are usually designed with complex and flexible structures to alter the photophysical properties against the strong dipole–dipole interactions, which open the nonradiative decay channels quenching the solid state luminescence.…”

“…26−28 The anions used, either as terminal or as bridging ligands, alter the chemistry of the complex to a great extent and affect their supramolecular assembly in the solid state. 29 The cationic fluorogens are usually designed with complex and flexible structures to alter the photophysical properties against the strong dipole−dipole interactions, which open the nonradiative decay channels quenching the solid state luminescence. The changes of the anions would also greatly influence the emission in aggregation of organic salts as well as with metal complexes, because the strength of electrostatic attraction between cationic and anionic species and steric hindrance may deeply affect the molecular packing in aggregation.…”

Mechanochemical Synthesis of a Cocrystal of Two Supramolecular Hydrogen-Bonded Aggregates of 1,3,6,8-Tetraazatricyclo[4.3.1.13,8]undecane (TATU) with 4-tert-Butylphenol Bearing Different Hydrogen Bonding Interactions

“…Noncovalent interactions, such as electrostatic forces, H-bonds, halogen bonds, CH-π, π-π stacking, cation-π, anion-π, lone pair-π associations and other weak forces, play significant roles in a variety of fields, including molecular recognition, host-guest chemistry, crystal engineering, supramolecular chemistry, biochemistry, pharmaceutical chemistry, and materials science [1,2]. Of these interactions, hydrogen bond interactions are the most powerful supramolecular interactions through which many topology structures, such as an infinite 1-D chain, 1-D tapes, 2-D sheet, and 3-D networks, can be assembled [3,4].…”