Yuan Baoling, Gou Gaozhang, Fan Tao, Liu Mingxian, Ma Yunsheng, Matsuda Ryotaro, Li Liangchun
Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P. R. China.
Department of Chemistry and Biotechnology, School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan.
Angew Chem Int Ed Engl. 2022 Jul 11;61(28):e202204568. doi: 10.1002/anie.202204568. Epub 2022 May 19.
Photoresponsive arylsilanes have been fascinating molecules for decades because of their unique photophysical characteristics and surface chemistry. Here we report the synthesis and fabrication of a crystalline two-dimensional trisilyl metal-organic framework (TSiMOF) orderly installed with the classical photoresponsive hexamethyltrisilane groups on the surface. Irradiated by UV light under air in minutes the fluorescence of the TSiMOF is turned on simultaneously with an intriguing surface transformation from superhydrophobic to hydrophilic. Thus, multifarious luminescent and hydrophilic patterns including logos, characters and Quick Response codes, etc. with good resolution are readily generated on the facilely fabricated TSiMOF film. The mechanism of this transformation is revealed by control experiments that the superficial trimethylsilyl groups suffering photochemical oxidation have been converted to hydroxyl groups.
几十年来，光响应性芳基硅烷因其独特的光物理特性和表面化学性质而成为引人关注的分子。在此，我们报告了一种晶体二维三硅烷基金属有机框架（TSiMOF）的合成与制备，该框架在表面有序安装了经典的光响应性六甲基三硅烷基团。在空气中用紫外光照射几分钟后，TSiMOF的荧光被开启，同时伴随着从超疏水到亲水的有趣表面转变。因此，在容易制备的TSiMOF薄膜上可以轻松生成包括标志、字符和二维码等具有良好分辨率的多种发光和亲水图案。对照实验揭示了这种转变的机制，即表面的三甲基硅烷基团发生光化学氧化后转化为羟基。
