A Double Layer Laminated Film of Cellulose Nanocrystals and Dye Displaying Vibrant Circularly Polarized Light
A Double Layer Laminated Film of Cellulose Nanocrystals and Dye Displaying Vibrant Circularly Polarized Light
复制标题
DOI：
10.1007/s40242-021-1436-4
复制
发表时间：
2021-12
影响因子：
3.1
通讯作者：
Lihong Wei;Xiaoting Ma;Yan Xu
中科院分区：
文献类型：
--
作者：
Lihong Wei;Xiaoting Ma;Yan Xu
圆偏振光（CP）是一种圆偏振光，由于其独特的光学特性，包括光信息存储能力和手性特异性，在信息存储与加密、三维显示和传感等应用中具有重要意义[1-6]。为了产生圆偏振光，手性和光包括自发光和入射光是必要的。研究表明，小的手性有机分子[7-9]、手性稀土配合物[10-12]和手性超分子组合物[13-16]能够将自发发光转化为CP发光，其水平可以用发光不对称因子glum来测量[17,18]。高胶值、特定的手性和可调谐的波段波长是CP发光的理想属性。获得白色或多色CPL材料的一种常用方法是在一个手性主体内组合多个发光团[19-21]。例如，Liu和Duan等人[19]通过在手性纳米管中封装多种类型的聚集诱导发射（AIE）剂实现了多色CP发光。方法简单，但CP发光手性不可控。另一种实现多色CP发光的方法是将刺激响应发光团封装在手性环境中[22,23]。Liu和Jiang等人[22]利用发光团质子化程度的变化，实现了从蓝色到绿色、从黄色到橙色的CP发光。Deng等人[24]报道了不同共轭长度的螺旋聚乙烯烃可以将吸收光转化为CP光。迄今为止，开发一种简单的方法来生产具有可调谐特性的圆偏振光仍然具有挑战性。
Circularly polarized (CP) light is a circularly polarized electromagnetic wave and is of significance for applications, such as information storage and encryption, 3D display and sensing due to its unique optical properties including optical information storage capacity and chiral specificity [1―6]. In order to produce circularly polarized light, chirality and light including spontaneous luminescence and incident light are necessary. It has shown that small chiral organic molecules [7―9], chiral rare earth complexes [10―12], and chiral supramolecular assemblies [13―16] are capable of transforming spontaneous luminescence to CP luminescence while the level can be measured using luminescence dissymmetry factor glum [17, 18]. High glum value, specific handedness and tunable band wavelengths are desirable attributes of CP luminescence. A common method to obtain white or multicolor CPL materials is to combine multiple luminophores within a chiral host [19―21]. For example, Liu and Duan et al.[19] realized multi-color CP luminescence by encapsulating multiple types of aggregationinduced emission (AIE) agents in chiral nanotubes. The method is simple, however, the CP luminescence handedness was non-controllable. Another method to enable multi-color CP luminescence was achieved by encapsulating a stimuliresponsive luminophore in a chiral environment [22, 23]. Liu and Jiang et al.[22] realized the CP luminescence from blue via green and yellow to orange by taking advantage of the change of the protonation degree of the luminophore. Deng et al.[24] reported that helical polyacetylenes with different conjugated lengths can be used to convert absorbed light to CP light. To date, it remains challenging to develop a facile method to produce circularly polarized light with tunable properties using a single luminophore.