Utilizing the heterocyclic effect towards high contrast ratios of mechanoresponsive luminescence based on aromatic aldehydes

Abstract

Utilizing heterocycles with different-membered rings and additional heteroatoms would be an effective way to increase MRL contrast ratios by tuning different types of noncovalent interactions in the solid state.

Dithienylethene-based photoswitchable phosphines for light-controlled palladium-catalyzed Stille coupling reaction

“…Figure2b, Table1and FigureS5). In combination with NMR spectroscopic measurements in toluene-d 8 and TD-DFT calculations, it was demonstrated that DTE photocyclization takes place in the complexes, in contrast to some previously reported DTE-based phosphine-metal compounds 39,46. However, palladium(II) complexation did have a relevant effect on the UV-induced ring-closing process of the phosphine ligands.…”

Structure–activity strategies for mechanically responsive fluorescent materials: a molecular perspective

“…In addition to the design strategies mentioned above, there are other factors that affect the mechanical response, such as the introduction of boron heteroatoms or controlling the appropriate number of flexible chains. 60 Cao et al proposed a novel design strategy: introducing BN units into highly planar and large rigid aromatic skeletons, adjusting molecular dipole moments and intermolecular interactions, forming planar quadrilateral molecular stacking, and making molecules more responsive to external stimuli, as shown in Fig. 8-(8-1).…”

Imine bond orientation manipulates AIEgen derived Schiff base isomers through the intramolecular hydrogen bond effect for different fluorescence properties and applications

“…[16][17][18] This phenomenon is mainly due to the complicated involvement of multiple factors, such as molecular configuration and inter/intra molecular interactions, which affect the macroscopic properties of functional materials. [19][20][21] Therefore, the development of an efficient perspective to design fluorescent Schiff bases with predictable properties may advance the investigation of functional Schiff bases.…”