Tong Fei, Xu Wenjing, Al-Haidar Maram, Kitagawa Daichi, Al-Kaysi Rabih O, Bardeen Christopher J
Chemistry Department, University of California, Riverside, 501 Big Spring Road, Riverside, CA, 92521, USA.
College of Science and Health Professions-3124, King Saud bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh, 11426, Kingdom of Saudi Arabia.
Angew Chem Int Ed Engl. 2018 Jun 11;57(24):7080-7084. doi: 10.1002/anie.201802423. Epub 2018 May 9.
A surfactant-assisted seeded-growth method is used to form single-crystal platelets composed of 9-methylanthracene with two different internal molecular orientations. The more stable form exhibits a photoinduced twisting, as observed previously for 9-methylanthracene microribbons grown by the floating drop method. However, the newly discovered elongated hexagonal platelets undergo a photoinduced rolling-up and unrolling. The ability of the rolled-up cylindrical shape to trap superparamagnetic nanoparticles enables it to be carried along in a magnetic field gradient. The new photoinduced shape change, made possible by a novel surfactant-assisted crystal growth method, opens up the possibility of using light to modulate the crystal translational motion.
一种表面活性剂辅助的种子生长方法被用于形成由9-甲基蒽组成的具有两种不同内部分子取向的单晶片。更稳定的形式表现出光致扭曲，这与之前通过浮滴法生长的9-甲基蒽微带所观察到的情况相同。然而，新发现的细长六边形片会发生光致卷曲和展开。卷曲的圆柱形状捕获超顺磁性纳米颗粒的能力使其能够在磁场梯度中被携带。这种新的光致形状变化通过一种新颖的表面活性剂辅助晶体生长方法得以实现，为利用光来调制晶体平移运动开辟了可能性。
