A new class of “electro-acid/base”-induced reversible methyl ketone colour switches
作者:Yu-Mo Zhang、Minjie Li、Wen Li、Zhiyuan Huang、Shaoyin Zhu、Bing Yang、Xiao-Chun Wang、Sean Xiao-An Zhang
DOI:10.1039/c3tc30769g
日期:——
Methyl ketone has been designed as a switching unit for electrically addressable molecular colour switches. A newly proposed mechanism of âelectro-acid/baseâ (radical ions)-induced intermolecular proton transfer for the colour switch is proven clearly by cyclic voltammetry (CV), X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (IR) and in situ UV-Vis spectroscopy. A dramatic spectral absorption shift (about 291 nm) is observed during the switching, and blue, yellow and green colours are obtained by adjusting the substituents on the methyl ketone-bridged unit. The in situ âelectro-acid/baseâ is far more convenient than the conventional chemical stimulus of acids or bases for the manipulation of the molecular switching properties. This new switching method and molecular structure manipulation will inspire and accelerate the further development of broad switching materials and applications in ultrathin flexible displays, etc.
甲基酮被设计为电可调分子颜色开关的开关单元。通过循环伏安法(CV)、X射线光电子能谱(XPS)、红外光谱(IR)和原位紫外-可见光谱,新的“电酸/碱”(自由基离子)诱导的分子间质子转移机制得到了明确证明。在开关过程中观察到显著的光谱吸收位移(约291纳米),通过调节甲基酮桥接单元上的取代基,可以获得蓝色、黄色和绿色。原位“电酸/碱”调节比传统的酸或碱化学刺激更为方便,能够操控分子的开关特性。这种新的开关方法和分子结构操控将激励并加速广泛开关材料及其在超薄柔性显示器等应用的发展。