High Pressure Effects on the Emission Properties and Crystal Structure of Coumarin 120

Activation and Tuning of Green Fluorescent Protein Chromophore Emission by Alkyl Substituent-Mediated Crystal Packing

“…A combination of time-resolved and steady-state emission techniques may allow the deconvolution of contributions from multichromophoric systems. Fluorescence lifetimes obtained from measurements of the solid-state of materials are often complex, and multiexponential decay profiles are observed, which could be attributed to the presence of molecules in different states of aggregation in the solid state . In addition, due to the complexity of the excitation spectra in the solid-state ROBDI derivatives, it is feasible to use pulsed diode lasers with two different wavelengths (372 and 467 nm) as excitation sources in the TCSPC system.…”

Mechanochromic Luminescent Tetrathiazolylthiophenes: Evaluating the Role of Intermolecular Interactions through Pressure and Temperature-Dependent Raman Spectroscopy

“…They are good alternatives to inorganic sensors due to many advantages, such as good flexibility, low-cost preparation, and large-area fabrication. Up to now, there were only very few organic materials reported to exhibit significant piezochromism, as a result of crystalline structure changes (related to different intermolecular packing) [1][2][3][4][5][6] . In the particular case of 2,3,4,5-Tetra(2-thiazolyl)thiophene crystals 1 , the interplay among a 3-D network of intermolecular N…H-C hydrogen bonds and - interactions between stacked molecules forming dimers confers to the crystal a peculiar sensitivity to mechanical stress.…”

“…They are good alternatives to inorganic sensors due to many advantages, such as good flexibility, low-cost preparation, and large-area fabrication. Up to now, there were only very few organic materials reported to exhibit significant piezochromism, as a result of crystalline structure changes (related to different intermolecular packing). − In the particular case of 2,3,4,5-tetra­(2-thiazolyl)­thiophene crystals, the interplay among a three-dimensional (3D) network of intermolecular N···H–C hydrogen bonds and π–π interactions between stacked molecules forming dimers confers to the crystal a peculiar sensitivity to mechanical stress. Indeed, the material exhibits luminescent chromism, i.e., a remarkable shift of the fluorescence emission, induced both by grinding and by modulation of the hydrostatic pressure. − Piezochromism is relevant in the perspective of the potential applications, such as memory devices and sensors.…”

Molecular Dual-Rotators with Large Consecutive Emission Chromism for Visualized and High-Pressure Sensing

“…In recent years, very few organic materials have been reported to exhibit significant piezochromism, caused by change of crystal structures (relating to different intermolecular packing). 14 However, these materials always exhibit prominent mechanoluminescence properties under smashing or grinding, due to the easy disturbance of weak noncovalent interactions between molecules. Some of them even show significant emission color change upon heating.…”

“…Organic sensors are always regarded as good potential alternatives due to many advantages, such as low-cost preparation, good flexibility, and large-area fabrication. In recent years, very few organic materials have been reported to exhibit significant piezochromism, caused by change of crystal structures (relating to different intermolecular packing) . However, these materials always exhibit prominent mechanoluminescence properties under smashing or grinding, due to the easy disturbance of weak noncovalent interactions between molecules.…”