Engineering linkers to regulate solid-state emission of spirodifluorene-based conjugated porous polymers for white light-emitting devices,Polymer Chemistry

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Engineering linkers to regulate solid-state emission of spirodifluorene-based conjugated porous polymers for white light-emitting devices
Polymer Chemistry ( IF 4.1 ) Pub Date : 2024-06-07 , DOI: 10.1039/d4py00319e
Yinan Hu _{1,

2} , Mingkai Shi ₂ , Shulin Meng _{1,

2} , Haocheng Zhao ₃ , Junfeng Wang _{1,

2} , Yuling Wu _{1,

2} , Jie Li ₂ , Yanqin Miao ₂ , Hua Wang ₂

Affiliation

Conjugated porous polymers (CPPs) are preferred new luminescent materials in the field of photoelectronics. The unique porous and conjugated structures can successfully restrict the torsion of aromatic units, attenuate intermolecular π–π stacking, promote exciton mobility, and thus, enhance the fluorescence activity. Herein, spiro [3,3] heptane-2,6-bis(2′,2′′,7′,7′′-tetrabromo)spirofluorene (TBrSDF)-based conjugated porous polymers, CPP-1 and CPP-2, with different conjugation lengths were developed by condensation with 9,9-dioctylfluorene-2,7-diboronic acid (M₁) and 2,7-diethynyl-9,9-dioctylfluorene (M₂), respectively. A series of luminescent films for solid-state lighting were prepared by dispersing the two CPPs with different ratios in polymethyl methacrylate (PMMA) matrixes, and warm white light according to the commission internationale de l'eclairage (CIE) coordinates of (0.33, 0.44) was obtained with a ratio of 1 : 4. In addition, the two CPPs were used as light-converting materials coated directly onto the surface of ultraviolet light-emitting diodes (UV LEDs), and the CPP-2-coated LEDs emitted warm white light with CIE coordinates of (0.33, 0.37).

中文翻译：

用于调节白光发射器件中螺二芴基共轭多孔聚合物固态发射的工程连接体

共轭多孔聚合物（CPP）是光电子领域首选的新型发光材料。独特的多孔和共轭结构可以成功限制芳香单元的扭转，减弱分子间π-π堆积，促进激子迁移率，从而增强荧光活性。在此，螺[3,3]庚烷-2,6-双(2',2'',7',7''-四溴)螺芴(TBrSDF)基共轭多孔聚合物CPP-1和CPP-2，通过与 9,9-二辛基芴-2,7-二硼酸 (M ₁ ) 和 2,7-二乙炔基-9,9-二辛基芴 (M ₂

更新日期：2024-06-07

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