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Ratiometric Piezochromism of Electrospun Polymer Films: Intermolecular Interactions for Enhanced Sensitivity and Color Difference.
ChemPlusChem ( IF 3.4 ) Pub Date : 2018-03-23 , DOI: 10.1002/cplu.201800080
Heyi Yang 1, 2 , Zhanghua Sun 1 , Chunyan Lv 2 , Moge Qile 1 , Kai Wang 3 , Huiwen Gao 2 , Bo Zou 3 , Qingbao Song 1 , Yujian Zhang 2
Affiliation  

Many piezochromic luminescent (PCL) dyes are known for their fluorescent switching capacity in the powdered phase, but they are usually difficult to utilize practically owing to poor mechanical properties. Herein, a nanofiber film fabricated through an electrospinning process is doped with PCL dye. The electrospun film not only reveals the mechanics of macromolecular materials, but also achieves precise, gradient pressure recognition (ratiometric PCL behavior). The PCL sensitivity and color difference of the dye in a crystalline state are calculated to be 15.7 nm GPa-1 and 149 nm, respectively. The sensitivity of an electrospun film containing 0.1 % (w/w) dye decreased to 3.6 nm GPa-1 . Moreover, the individual effects of molecular conformation and intermolecular interaction on the PCL properties have been clearly distinguished through in situ high-pressure experiments. Intermolecular interactions play a more significant role in PCL color difference and sensitivity. The film fabricated through an electrospinning process contributes to understanding of the working mechanism and real applications of piezochromic materials.

中文翻译:

静电纺丝聚合物薄膜的比例压致变色:分子间相互作用增强了感光度和色差。

许多压致变色发光(PCL)染料以其在粉末相中的荧光转换能力而著称,但由于机械性能较差,通常通常很难实际使用。在此,通过电纺丝工艺制造的纳米纤维膜被PCL染料掺杂。电纺膜不仅揭示了高分子材料的力学原理,而且还实现了精确的梯度压力识别(比重PCL行为)。计算出结晶态的染料的PCL灵敏度和色差分别为15.7 nm GPa-1和149 nm。含有0.1%(w / w)染料的静电纺丝薄膜的灵敏度降至3.6 nm GPa-1。而且,通过原位高压实验已清楚地区分了分子构象和分子间相互作用对PCL性质的影响。分子间相互作用在PCL色差和灵敏度中起更重要的作用。通过静电纺丝工艺制造的薄膜有助于理解压致变色材料的工作机理和实际应用。
更新日期:2018-03-23
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