Zhan, Yong published the artcileMechanofluorochromism based on BOPIM complexes: The effect of substituents and regulation of the direction of the emission color changes, Related Products of nitriles-buliding-blocks, the main research area is preparation boron pyridyl imidazole complex; crystal mol structure boron pyridyl imidazole complex; mechanofluorochromism boron pyridyl imidazole complex; thermal decomposition boron pyridyl imidazole complex.
Novel boron 2-(2′-pyridyl)imidazole (BOPIM) complexes T1, T2 and T3 with different substituents (including bromo, tert-Bu and methoxyl) on the benzene ring of BOPIM dyes were designed and synthesized, and their optical properties in both solution and the solid state were studied and compared. The three compounds exhibited typical intramol. charge transfer (ICT) characteristics. Solvent-dependent UV-visible absorption, fluorescence emission spectra and quantum chem. calculation indicated a mol. push-pull electronic structure. Their ICT degrees increased with the sequence of T1 < T2 < T3. The anal. of the x-ray crystal structure revealed the twisted mol. conformation of BOPIM dyes. Furthermore, they showed remarkable reversible mechanofluorochromic (MFC) features under mech. force. The MFC activities could be tuned easily by changing the substituents on the BOPIM dyes. T1 exhibited emission color change from bright green to yellowish green with a spectral red shift of only 22 nm under mech. stimuli, whereas T2 and T3 gave the large spectral red shifts of 36 and 30 nm. Electronic and steric effects of the substitutes were proved playing significant roles in regulating the ICT effect and intermol. interactions. More importantly, the remarkable effect of substituents on the MFC behaviors of BOPIM dyes will provide an effective way to obtain novel high-contrast MFC dyes. Dyes and Pigments published new progress about Crystal structure. 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Related Products of nitriles-buliding-blocks.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts