Solvent-induced construction of two zinc supramolecular isomers: synthesis, framework flexibility, sensing properties, and adsorption of dye molecules

Abstract

Solvent-induced construction of two zinc supramolecular isomerism, sensing properties and adsorption of dye molecules.

Solvent-Induced Controllable Supramolecular Isomerism: Phase Transformation, CO2 Adsorption, and Fluorescence Sensing toward CrO42–, Cr2O72–, MnO4–, and Fe3+

“…Solvent suspensions of 1α -DMF exhibit fluorescence intensity in the trend of DMF (424 nm) > ACE (425 nm) ∼ MeOH (420 nm) > DCM (458 nm) > Tol (455 nm) > H 2 O (450 nm), and solvent suspensions of 1β -DMAc show a similar trend of DMF (422 nm) > DCM (464 nm) ∼ DMAc (441 nm) > Tol (461 nm) > H 2 O (463 nm). This is attributed to different collision interactions between the solvent molecules and the frameworks of 1α -DMF and 1β -DMAc. − In addition, 1α -DMF in DMF, ACE, and MeOH suspensions and 1β -DMAc in DMF and DMAc suspensions show fluorescence emissions very close to their solid-state fluorescence in position, while, in comparison, both 1α -DMF and 1β -DMAc reveal red shifts more than 20 nm in DCM, Tol, and H 2 O suspensions.…”

A Water-Stable 2-Fold Interpenetrating cds Net as a Bifunctional Fluorescence-Responsive Sensor for Selective Detection of Cr(III) and Cr(VI) Ions

“…In addition, the emission maxima of these suspensions varied from 384 nm to 432 nm, showing remarkable blue shift compared to the solid-state fluorescence. The phenomena can most likely be attributed to the different collision interactions rather than crystal structure change [ 56 , 57 ], since that 1 is highly stable in all chosen solvents. Additionally, it is noted that the fluorescence emission intensities are nearly directly proportional to the concentrations of 1 in H 2 O suspensions ( Figure S4 ).…”

Engineered Bifunctional Luminescent Pillared‐Layer Frameworks for Adsorption of CO2 and Sensitive Detection of Nitrobenzene in Aqueous Media

“…For other solvent molecules, such as CH 3 OH, CH 3 CN, CH 2 Cl 2 , and toluene, as the dispersion media, MOFs 1 – 5 showed luminescent intensities from moderate to weak. Such phenomena can be mainly attributed to different interactions between the homogeneously dispersible framework structure and distinct solvent molecules [65, 66] . On the other hand, shifts in the luminescence emissions of MOFs 1 – 5 were observed upon changing the solvent, with the longest luminescence band appearing in the case of toluene ( λ em =446–460 nm).…”