So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Fu, Shengjie; Tan, Yi; Zhang, Shiai; Lv, Jiayi; Feng, Xiucun; Xu, Defang; Liu, Xingliang researched the compound: Palladium(II) acetate( cas:3375-31-3 ).Synthetic Route of C4H6O4Pd.They published the article 《Excellent and reversible mechanofluorochromism in donor-acceptor π-systems based on bisarylic methanone derivatives》 about this compound( cas:3375-31-3 ) in Dyes and Pigments. Keywords: excellent reversible mechanofluorochromism donor acceptor system bisarylic methanone derivative. We’ll tell you more about this compound (cas:3375-31-3).
Mechanofluorochromic (MFC) materials characterized by high-contrast fluorescent colors and/or high intensities have rarely been reported. This can be attributed to the complex mechanism and mol. design associated with MFC phenomenon. Herein, the route followed for the preparation of two D-A type bisarylic methanone fluorescent mols. CAR-BZ-POZ and CAR-BZ-PTZ, has been presented. Results obtained from systematic photophys. experiments reveal that CAR-BZ-POZ and CAR-BZ-PTZ are characterized by twisted intramol. charge-transfer (TICT) states, highly distorted mol. conformations, good solid-state emission properties, and high-contrast reversible mechanofluorochromism. The as-prepared CAR-BZ-POZ and CAR-BZ-PTZ solids emitted intense yellow-green fluorescence (531 and 550 nm, resp.), and the solid-state luminescence efficiencies recorded were 32.54% and 24.92%, resp. When the samples were ground, orange-red fluorescence was emitted (602 and 594 nm, for CAR-BZ-POZ and CAR-BZ-PTZ, resp.). Results obtained by conducting mechanistic studies suggest that the MFC phenomenon can be attributed to the phase transition (from crystalline to amorphous phase) of the mols. The red-shift in the PL spectral profiles, achieved following the process of grinding, could be attributed to the extension of the mol. conjugation length and the planar intramol. charge transfer (PICT) properties.
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