Organic Small Molecule Fluorescent Dyes Based on Pigment Red 254 with Both Mechanofluorochromic and Thermochromic Behaviors
The compound 2,5-diheptyl-3,6-bis(4-chlorophenyl)-pyrrolopyrrole-1,4-dione(c7dpp)was synthesized by n-alkyl chain double substitution of Pigment Red 254.Its prop-erties in mechanofluorochromic and thermochromism were studied.Under the excitation of 365 nm ultraviolet light,the solid powder sample obtained by rotary evaporation,emitting bright yellow fluorescence(563 nm).After grinding,the red shifts to 582 nm.After solvent fumigation or 135℃annealing,the sample emits yellow green fluorescence(537 nm).After grinding again,it can return to 582 nm,and the spectral peak shift reaches 45 nm.XRD a-nalysis shows that the mechanochemical behavior of the molecule is closely related to the change of molecular stacking structure,and shows a strong response of properties to struc-ture.These excellent stimulus response materials have high application value in the fields of light-emitting devices and sensors.
Pigment Red 254diketopyrrolopyrrolemechanofluorochromicthermochro-micmultistimuli-responsive materials
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维普
