Deep insights into polymorphism initiated by exploring multicolor conversion materials

Abstract

The two isomers exhibit almost identical solvatochromism and AIE activity but high-contrast polymorphism and mechanochromism.

Luminescent polymorphic crystals: mechanoresponsive and multicolor-emissive properties

“…6a). 66 The emission wavelength of the polymorphs shifted by 11-48 nm in the hypsochromic direction upon slight grinding. Further strong grinding resulted in the bathochromic shift of the emission wavelength up to 51 nm.…”

Disparity in piezofluorochromism for twisted mono-carbazole-based AIEgens resulting from interchanging electron-rich substituents: effect of coplanarity on twisted π-conjugates

“…TMBpCBZ was purified by column chromatography using ethyl acetate and petroleum ether (5% ethyl acetate in petroleum ether). A similar method was followed for CBZpTMB using diethyl ((10-(9-pentyl-9H-carbazol-3-yl)anthracen-9-yl) methyl)phosphonate (CBZP) 10 1…”

“…The molecular response of changing photoluminescence (PL) properties as a result of various stimuli conveys the fundamental basis of PL switching, security papers, optoelectronic devices, and data storage in several applied fields. [1][2][3][4][5] An observable color change from the same molecule, without any tedious chemical modifications, offers significant benefits. However, this emission color change under mechanical force/pressure in the solid-state is difficult to predict or design.…”

Mechanochromic luminogens with hypsochromically shifted emission switching property: recent advances and perspectives

“…Wang et al reported a boron complex of tetraphenylethylene incorporated β-diketonate, 29 (Chart 3), and successfully developed four different crystalline forms ( 29Y , 29R , 29N and 29F ) of it by using the dichloromethane and hexane mixed solvent system. 114 Fig. 16(a, c, e and g) shows the fluorescence spectra of 29Y , 29R , 29N and 29F under different stimuli in which the prominent emission peaks for the crystalline forms of 29Y , 29R , 29N and 29F were observed at 547 nm, 580 nm, 617 nm, and 602 nm, respectively.…”