Two piezochromic molecules, (2Z,4E)-2-(4-(Diphenylamino)phenyl)-5-phenylpenta-2,4-dienenitrile (1a) and (2Z,4E)-2-(4-(acridin-10(9H)-yl)phenyl)-5-phenylpenta-2,4-dienenitrile (1b), were synthesized by using Knoevenagel and Buchwald-Hartwig cross-coupling reactions. Their piezochromic fluorescence behavior was tuned by subtle structural change. The system indicates typical intramolecular charge-transfer properties. The luminescence intensity of 1a decreased with increasing pressure with the redshift of the emission wavelength when the hydrostatic pressure in a diamond anvil cell (DAC) was applied on its crystal. However, the emission wavelength of 1b which has a methylene unit more than 1a had no obvious shift and the intensity increased gradually at the pressure range from 0.66 GPa to 5.72 GPa.

两个压致变色分子（2 Z，4 E）-2-（4-（二苯氨基）苯基）-5-苯基戊-2,4-二烯腈（1a）和（2 Z，4 E）-2-（4-（丙烯腈-10（9H）-基）苯基）-5-苯基戊-2,4-二烯腈（1b）是通过Knoevenagel和Buchwald-Hartwig交叉偶联反应合成的。它们的压致变色荧光行为通过微妙的结构变化进行了调节。该系统指示典型的分子内电荷转移性质。当将金刚石砧座单元（DAC）中的静水压力施加到晶体上时，随着发射波长的红移，发光强度1a随发射波长的红移而降低。但是，发射波长为图1b，其具有一个亚甲基单元超过1A无明显移和强度在压力范围逐渐增加从0.66 1GPa至5.72 GPA。