Arrangements of fluorophores in the salts of imidazole tethered anthracene derivatives with pyridinedicarboxylic acids influencing photoluminescence

Abstract

The self-assemblies of salts of 9-N-(3-imidazolylpropylamino)methylanthracene (Hanthraimida) with pyridinedicarboxylic acid and cocrystals with 1,3-dihydroxybenzenes were analysed to sort out their impacts on the aggregation induced emissions in solid state. Varieties...

Assemblies of salts of urea and thiourea derivatives and release of hosts from composites with calcium oxide

“…Thus, relinquishing the weaker hydrogen bond of urea N-H would impart a more negative character to the nitrogen next to naphthalene causing delocalization over naphthalene, resulting in degenerate states leading to the dual emission, of which one emission is at a relatively longer wavelength. We have recently reported dual emissions in solid samples of organic salts; they were observed due to the change in the domain 82 and also due to the presence of multiple numbers of symmetry non-equivalent molecules in a unit cell. In the present case, it is the excited states having a difference in H-bonds that may be mixing together to generate degenerate states.…”

π-Stacking among the Anthracenyl Groups of a Copper Complex Resulted in Doubling of Unit Cell Volume To Provide New Polymorphs

“…The Hanthraimmida has a π-aromatic anthracenyl group appended though flexible linkers (Figure d). It is known to provide cocrystal with pyridine dicarboxylic acid, where the organo cations of Hanthraimmida shows symmetry nonequivalent forms. The literature suggests that symmetry-independent molecules provide polymorphs or synthon variations .…”