Wang Yong, Zhang Qiaoqiao, Liu Qi, Abrahams Brendan F, Lang Jian-Ping
College of Chemistry, Chemical Engineering and Materials, Soochow University, Suzhou, 215123, Jiangsu, People's Republic of China.
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, People's Republic of China.
Angew Chem Int Ed Engl. 2024 Sep 16;63(38):e202409472. doi: 10.1002/anie.202409472. Epub 2024 Aug 6.
With the aim of producing a photomechanical material for incorporation in soft microrobots, a one-dimensional diene coordination polymer (CP) [Cd(F-bpeb)(3-CBA)] (CP1, F-bpeb=4,4'-((1E,1'E)-(2,5-difluoro-1,4-phenylene)bis(ethene-2,1-diyl))dipyridine, 3-HCBA=3-chlorobenzoic acid) was synthesized and characterized. Irradiation of CP1 with ultraviolet (UV) or visible light causes [2+2] photocycloaddition reactions resulting in the introduction of crystal strain which triggers various types of crystal movements. Composite films of CP1-PVA (SC) fabricated by dispersing CP1 crystals into polyvinyl alcohol (PVA) solution allow amplification of the crystal movement so that the film strips exhibit fast and flexible curling upon photoirradiation. The composite films may be cut into long rectangular strips and folded to simulate soft microrobots which exhibit a variety of fast, flexible and continuous photomechanical movements resembling a human performing various gymnastic exercises.
为了制备一种用于软微型机器人的光机械材料，合成并表征了一种一维二烯配位聚合物（CP）[Cd(F-bpeb)(3-CBA)]（CP1，F-bpeb = 4,4'-((1E,1'E)-(2,5-二氟-1,4-亚苯基)双(乙烯-2,1-二基))二吡啶，3-HCBA = 3-氯苯甲酸）。用紫外线（UV）或可见光照射CP1会引发[2+2]光环加成反应，导致引入晶体应变，从而引发各种类型的晶体运动。通过将CP1晶体分散到聚乙烯醇（PVA）溶液中制备的CP1-PVA复合膜（SC）可以放大晶体运动，使得膜条在光照射下表现出快速且灵活的卷曲。复合膜可以切割成长方形长条并折叠以模拟软微型机器人，这些机器人表现出各种快速、灵活且连续的光机械运动，类似于人类进行各种体操运动。
