Enhanced luminescence of single-benzene fluorescent molecules through halogen bond cocrystals

Abstract

Organic single fluorescent molecules often suffer from aggregation-induced quenching effect under solid-state conditions, especially for red-emissive molecules, due to the flat rigid molecular framework and strong π-π interaction. Cocrystal engineering...

Effects of Gamma Radiation on Single- and Multicomponent Organic Crystalline Materials

“…The single components with a single aromatic ring showed no or weak fluorescence both pre and postradiation (Figures S52–S57). This is expected as these single-component phases are known for being relatively weak fluorophores due to aggregating-induced quenching within the solid state . Turning to the multicomponent phases, we note differing levels of quenching of the fluorescence signal for the preradiation samples.…”

“…This is expected as these single-component phases are known for being relatively weak fluorophores due to aggregating-induced quenching within the solid state. 56 Turning to the multicomponent phases, we note differing levels of quenching of the fluorescence signal for the preradiation samples. This has been previously noted to occur by Tamuly et al where they indicated 1,3-C 6 H 6 CO 2 and 1,4-C 6 H 6 CO 2 will engage in hydrogen bonding interactions with nitrogen-containing fluorophores to induce quenching in solution.…”

Modulation of luminescence properties of cocrystals composed of amino substituted dimethyl phthalates and 1,2,4,5-tetracyanobenzene by crystal engineering

“…However, the π–π stacking structure might cause fluorescence quenching and decrease quantum yield. 60–62…”

Exploring halogen⋯halogen interactions in supramolecular self-assemblies of BODIPY networks

“…Noncovalent interactions, such as hydrogen bonding (HB), halogen bonding (XB), electrostatic, dipole-dipole and van der Waals interactions, represent an essential set of tools for the building of supramolecular architectures with precisely controlled structures and functions. [1][2][3][4][5][6] Thanks to the dynamic and reversible properties of noncovalent interactions, supramolecular assemblies have been used in widespread applications such as catalysis, [7][8][9][10] solar cells, [11][12][13] crystal engineering, 14,15 sensors, 16,17 and stimuli-responsive and selfhealing materials. [18][19][20][21][22][23] Among these interactions, XB has become increasingly attractive as a routine and predictable tool in supramolecular chemistry, due to its highly directional nature, significant strength, and tunable length.…”