Switching of Radiation Force on Optically Trapped Microparticles through Photochromic Reactions of Pyranoquinazoline Derivatives
Switching of Radiation Force on Optically Trapped Microparticles through Photochromic Reactions of Pyranoquinazoline Derivatives
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通过吡喃喹唑啉衍生物的光致变色反应改变光捕获微粒上的辐射力
DOI：
10.1021/acs.jpcc.8b03420
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发表时间：
2018
影响因子：
3.7
通讯作者：
Kenji Setoura; Ahsan M. Memon; Syoji Ito*; Yuki Inagaki; Katsuya Mutoh; Jiro Abe; Hiroshi Miyasaka*
中科院分区：
文献类型：
--
作者：
正宗千明;松田友佳;唐澤嶺;清水貴博;柳谷隆彦;Kenji Setoura; Ahsan M. Memon; Syoji Ito*; Yuki Inagaki; Katsuya Mutoh; Jiro Abe; Hiroshi Miyasaka*
利用光控技术实现微小物体的机械运动，是发展介观遥控驱动器的重要方向。为此，光诱导分子、分子聚集体和晶体的形态变化在化学和材料科学领域得到了广泛的研究。在这里，我们建议直接使用光的动量（即辐射力）来控制小物体的运动，通过光致变色反应的吡喃喹唑啉（PQ）衍生物。PQ在可见光区为无色，在紫外光照射下为封闭形式，发生光化学开环反应生成有色异构体，开环异构体主要通过热逆反应返回无色封闭异构体。在实验中，单个聚合物微粒的直径为7 μm，并结合PQ被捕获的光镊。当用UV光照射捕获的微粒时，微粒通过由着色形式的PQ产生的吸收力而沿光传播轴沿着推动约几微米。此外，我们发现，被困微粒的动力学调节PQ的热逆反应。研究结果表明，光致变色反应的多样性可以通过光与分子之间的动量交换转化为介观运动。
Photocontrol of mechanical motions of small objects has attracted much attention to develop mesoscopic remote actuators. For this purpose, photoinduced morphological changes of molecules, molecular aggregates, and crystals have been extensively studied in the field of chemistry and materials science. Here, we propose direct use of momenta of light (i.e. radiation force) to control the motion of small objects, through photochromic reactions of pyranoquinazoline (PQ) derivatives. PQ is colorless in visible wavelength region while it is in closed form and undergoes photochemical ring-opening reactions to form colored isomers upon UV light irradiation; the open-ring isomers return to the colorless closed isomers mainly through the thermal back reaction. In the experiment, individual polymer microparticles with diameters of 7 μm incorporating PQ were trapped by optical tweezers. When the trapped microparticle was irradiated with UV light, the microparticle was pushed along the axis of light propagation about a few micrometers by absorption force arising from PQ in colored form. In addition, we found that dynamics of trapped microparticles was regulated by the thermal back reaction of PQ. The present results demonstrate that diversity of photochromic reactions can be transcribed into mesoscopic motions through the momentum exchange between light and molecules.
影响因子：
10.8
作者：
Toyoda K;Miyamoto K;Aoki N;Morita R;Omatsu T
通讯作者：
Omatsu T
影响因子：
11
作者：
Baffou, Guillaume;Quidant, Romain
通讯作者：
Quidant, Romain
影响因子：
64.8
作者：
Kobatake, Seiya;Takami, Shizuka;Irie, Masahiro
通讯作者：
Irie, Masahiro