Tang Qinglin, Liu Shasha, Liu Jin, Wang Yao, Wang Yanxin, Wang Shichao, Du Zhonglin, Huang Linjun, Belfiore Laurence A, Tang Jianguo
National Center of International Joint Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Sci. & Tech. Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80523, USA.
Polymers (Basel). 2022 Feb 24;14(5):905. doi: 10.3390/polym14050905.
With the growing needs for flexible fluorescence emission materials, emission fibers and related wearable fabrics with bright emission properties have become key factors for wearable applications. In this article, novel cuboid-like crystals of Eu complexes were generated. Except for light-energy-harvesting ligands of thenoyltrifluoroacetone (TTA) and 1,10-phenanthroline hydrate (Phen), the crystal structures were adjusted by other functional amphiphilic molecules. Not only does ETPC-SA, adjusted by stearic acid, have a regular cuboid-like crystal with a size of about 2 μm size, but it also generates the best photon emission property, with a fluorescence quantum yield of 98.4% fluorescence quantum yield in this report. Furthermore, we succeeded in producing novel fluorescent fibers by mini-twin-screw extrusion, and it was easy to form bright red fabrics, which are equipped with strong fluorescence intensity, flexibility, and a smooth hand feeling, with the normal fabricating method in our work. It is worth noting that ETPC-HQ fibers, which carry a crystal complex adjusted by hydroquinone, possess the lowest quantum yield but have the longest average fluorescence lifetime of 1259 µs. This result means that a low-density polyethylene (LDPE) matrix could make excited electrons stand in the excited state for a relatively long time when adjusted by hydroquinone, so as to increase the afterglow property of fluorescent fibers.
随着对柔性荧光发射材料需求的不断增长，具有明亮发射特性的发射纤维及相关可穿戴织物已成为可穿戴应用的关键因素。在本文中，生成了新型的铕配合物长方体状晶体。除了噻吩甲酰三氟丙酮（TTA）和1,10 - 菲啰啉水合物（Phen）等光能收集配体外，晶体结构还通过其他功能性两亲分子进行了调整。不仅由硬脂酸调整的ETPC - SA具有尺寸约为2μm的规则长方体状晶体，而且它还具有最佳的光子发射性能，在本报告中的荧光量子产率为98.4%。此外，我们通过微型双螺杆挤出成功制备了新型荧光纤维，并且通过我们工作中的常规制造方法很容易形成具有强荧光强度、柔韧性和光滑手感的亮红色织物。值得注意的是，携带由对苯二酚调整的晶体配合物的ETPC - HQ纤维具有最低的量子产率，但平均荧光寿命最长，为1259µs。这一结果意味着当由对苯二酚调整时，低密度聚乙烯（LDPE）基质可以使激发电子在激发态停留相对较长时间，从而提高荧光纤维的余辉性能。
