Rich-colour mechanochromism of a cyanostilbene derivative with chiral self-assembly
作者:Li Wen、Jingwei Sun、Chengjian Li、Chenfei Zhu、Xi Zhang、Zhenbo Wang、Qingbao Song、Chunyan Lv、Yujian Zhang
DOI:10.1039/d1nj01528a
日期:——
Mechanochromic luminophores exhibiting rich-colour transitions among multiple states have important potential applications, but few such compounds are known. Herein, chiral self-assembly fabrication is proposed as a valid method to realize a new type of metastable state, which may bring enriched PL colours. A novel chiral fluorophore, ACNS, was synthesized and assembled into helices with specific handedness
在多种状态之间表现出丰富颜色转变的机械致变色发光体具有重要的潜在应用,但很少有人知道此类化合物。在此,手性自组装制造被认为是实现新型亚稳态的有效方法,这可能会带来丰富的 PL 颜色。一种新型手性荧光团ACNS被合成并组装成具有特定旋向性的螺旋,在研磨和其他刺激下显示出黄色、绿色和蓝色之间的三色光致发光 (PL) 转变。结晶ACNS粉末(B相)发出明亮的天蓝色光。有趣的是,发光体组装成具有特定旋向性的螺旋纳米纤维(Y 相),在 539 nm 处呈现黄色荧光。此外,在研磨时,Y 相和 B 相粉末都变成绿色发光粉末(G 相),在 498 nm 处具有 PL 峰。这种策略在概念上很简单,并且为开发具有多色荧光切换的机械致变色发光团提供了一种有前途的方法。