WATLab and Department of Chemistry , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada.
Department of Chemistry , Chungnam National University , Daejeon 34134 , Republic of Korea.
ACS Appl Mater Interfaces. 2018 Dec 26;10(51):44768-44775. doi: 10.1021/acsami.8b17256. Epub 2018 Dec 11.
A blue fluorophore of Schiff base zinc complex is prepared by a hydrolysis-free solution-based synthetic method. Under ultraviolet (UV) excitation, the complex produces blue emission with a quantum yield ( Q) of 42.6% in methylene chloride and 24.0% in standalone powder form. Quantum mechanical calculations show that the blue emission is generated by the change in the chemical state of the ligand associated with the complexation with Zn cations. Thin films of Zn complexes incorporated in polymethylmethacrylate (PMMA) and cellulose acetate butyrate (CAB) polymers are also prepared by dispersing the complexes into the polymer matrices. These hybrid polymer films exhibit several notable features, particularly enhanced luminescence efficiency (with maximum Q of 85.8% for PMMA and 30.0% for CAB) and scalability for fabrication over a large area while retaining the original properties of the host polymers. Light-emitting diodes are also fabricated using the CAB hybrid thin films, and they show a Q of 43.2% with excellent photostability. The complex and its hybrid films demonstrate their great potential for such applications as UV-to-blue conversion devices in photoelectronics, solar-cell concentrators, solid-state lighting and display, and greenhouse agriculture.
一种基于无水解的溶液合成方法制备了席夫碱锌配合物的蓝色荧光团。在紫外（UV）激发下，该配合物在二氯甲烷中产生蓝色发射，量子产率（Q）为 42.6%，在独立粉末形式下为 24.0%。量子力学计算表明，蓝色发射是由配体的化学状态变化引起的，与 Zn 阳离子的络合有关。通过将配合物分散到聚合物基质中，还制备了掺入聚甲基丙烯酸甲酯（PMMA）和醋酸丁酸纤维素（CAB）聚合物中的 Zn 配合物的薄膜。这些混合聚合物膜具有几个显著的特点，特别是发光效率的提高（对于 PMMA 的最大 Q 为 85.8%，对于 CAB 的最大 Q 为 30.0%）和在保留聚合物主链原始性能的情况下在大面积上的可扩展性。还使用 CAB 混合薄膜制造了发光二极管，它们的 Q 为 43.2%，具有出色的光稳定性。该配合物及其混合薄膜在光电学中的 UV 到蓝光转换器件、太阳能电池聚光器、固态照明和显示器、温室农业等应用中显示出巨大的潜力。
