The development of stimuli-responsive difluoroboron β-diketonate materials has attracted more and more attention for their potential application in optoelectronics and functional bio-materials. In this study, we have designed and synthesized a novel photoresponsive dithienylethene-containing difluoroboron β-diketonate complex 1 by Knoevenagel condensation reaction. Its structure have been confirmed by ¹H NMR, ¹³C NMR and HRMS (ESI). And it exhibited solvent-dependent photophysical properties in solution before visible light irradiation. Subsequently, photochromism of 1 was investigated in solution, and it was found that 1 revealed solvent-dependent and visible light-triggered NIR photochromic behaviors. Moreover, it also displayed excellent fluorescence switching behavior and photochromism in the film state upon visible light irradiation. Accordingly, the dithienylethene 1 may be acted as a novel visible light-responsive fluorescence dyes in optoelectronic materials.

刺激响应性二氟硼β-二酮硼酸酯材料的开发由于其在光电子和功能性生物材料中的潜在应用而受到越来越多的关注。在这项研究中，我们已经设计并通过Knoevenagel缩合反应合成了一种新型的光响应性的含二噻吩乙烯的二氟硼β-二酮酸酯配合物1。其结构已通过¹ H NMR，¹³ C NMR和HRMS（ESI）确认。并且它在可见光照射之前在溶液中表现出溶剂依赖性的光物理性质。随后，在溶液中研究了1的光致变色，发现1揭示了溶剂依赖性和可见光触发的近红外光致变色行为。此外，在可见光照射下，其在膜状态下还显示出优异的荧光转换行为和光致变色。因此，二噻吩基乙烯1可以用作光电材料中的新型可见光响应型荧光染料。