Jessop Ignacio A, Díaz Fernando R, Terraza Claudio A, Tundidor-Camba Alain, Leiva Ángel, Cattin Linda, Bèrnede Jean-Christian
Departamento de Química, Facultad de Ciencias, Universidad de Tarapacá, P.O. Box 7-D, Av. General Velásquez 1775, Arica, Chile.
Departamento de Química Orgánica, Facultad de Química, Pontificia Universidad Católica de Chile, P.O. Box 306, Post 22, Santiago, Chile.
Polymers (Basel). 2018 May 21;10(5):553. doi: 10.3390/polym10050553.
A new series of two-dimensional statistical conjugated polymers based on aniline and 9,9-dihexylfluorene as donor units and benzo- or naphtho-quinoxaline/thiadiazole derivatives as acceptor moieties, possessing PANI segments as side chains, were designed and synthesized. To investigate the effects of the perpendicular PANI branches on the properties of the main chain, the optical, electrochemical, morphological and electroluminescence properties were studied. The 2D materials tend to possess lower molecular weights and to absorb and to emit light red-shifted compared to the trunk 1D-polymers, in the yellow-red region of the visible spectrum. The 1D- and 2D-conjugated polymers present optical band gaps ranging from 2.15⁻2.55 eV, HOMO energy levels between -5.37 and -5.60 eV and LUMO energy levels between -3.02 and -3.29 eV. OLED devices based on these copolymers were fabricated. Although the performances were far from optimal due to the high turn-on voltages for which electroluminescence phenomena occur, a maximum luminescence of 55,100 cd/m² together with a current density of 65 mA/cm² at 18.5 V were recorded for a 2D-copolymer, .
设计并合成了一系列新型二维统计共轭聚合物，该聚合物以苯胺和9,9 - 二己基芴作为供体单元，以苯并或萘并喹喔啉/噻二唑衍生物作为受体部分，并具有聚苯胺链段作为侧链。为了研究垂直聚苯胺支链对主链性质的影响，对其光学、电化学、形态学和电致发光性质进行了研究。与主干一维聚合物相比，二维材料往往具有较低的分子量，并且在可见光谱的黄 - 红区域吸收和发射红移光。一维和二维共轭聚合物的光学带隙范围为2.15⁻2.55 eV，最高占据分子轨道（HOMO）能级在 - 5.37和 - 5.60 eV之间，最低未占据分子轨道（LUMO）能级在 - 3.02和 - 3.29 eV之间。制备了基于这些共聚物的有机发光二极管（OLED）器件。尽管由于电致发光现象发生时的高开启电压，器件性能远未达到最佳，但对于一种二维共聚物，在18.5 V时记录到最大发光强度为55,100 cd/m²，电流密度为65 mA/cm² 。
