New carbazole-modified pyrazole derivatives were synthesized. It was found that tert-butylcarbazole derivatives of TCPDP, TCPHP, TCPPM and TCPPF exhibited reversible mechanofluorochromic (MFC) behavior under the treatment of grinding/fuming with CH₂Cl₂. Particularly, the emission of the as-synthesized crystals of TCPDP was weak and emerged in the ultraviolet region, while the grinding led to significant red-shift of the emission to the visible-light region, accompanied with the significant fluorescence enhancement on account of the formation of J-aggregates. Thus, TCPDP showed intriguing fluorescence switching in visible-light region during MFC processes, which could be easily observed visually. Additionally, TCPDP, TCPHP, TCPPM and TCPPF could form stable organogels in some organic solvents. Notably, the solutions of TCPPM and TCPPF were almost non-emissive, but gelation-induced blue emission was achieved. Thus, the fluorescence could be also turned on due to the AIE (aggregation-induced emission) during the gel formation.

合成了新的咔唑改性的吡唑衍生物。发现在用CH ₂ Cl ₂研磨/发烟的条件下，TCPDP，TCPHP，TCPPM和TCPPF的叔丁基咔唑衍生物表现出可逆的机械荧光致变色（MFC）行为。特别是，TCPDP的合成晶体的发射微弱，并出现在紫外光区域，而研磨导致发射光向可见光区域显着红移，同时由于碳纳米管的存在显着增强了荧光。J聚集体的形成。因此，TCPDP在MFC的过程中，在可见光区域显示出有趣的荧光切换，这在视觉上很容易观察到。另外，TCPDP，TCPHP，TCPPM和TCPPF可以在某些有机溶剂中形成稳定的有机凝胶。值得注意的是，TCPPM和TCPPF的解决方案几乎是非发射性的，但是实现了凝胶诱导的蓝色发射。因此，由于凝胶形成期间的AIE（聚集诱导的发射），荧光也可以被打开。