Mbarek M, Almoneef M M, Ben Saleh Y, Alimi K
Laboratoire de Recherche: Synthèse asymétrique et ingénierie moléculaires des matériaux nouveaux pour l'électroniques Organiques (LR18ES19), Faculté des Sciences de Monastir, Université de Monastir-Tunisie, Tunisia.
Physics Department, Faculty of Science, Princess Nourah Bint Abdulrahman University, Riyadh , Saudi Arabia.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 May 5;252:119509. doi: 10.1016/j.saa.2021.119509. Epub 2021 Jan 29.
The synthesis of new fluorescent polymers based on π-conjugated chains is a major challenge for organic electronic. The materials must be soluble, stable over long periods and able to be produced with a high yield. In particular, poly (vinylcarbazole), poly (fluorenes), and poly (thiophene) partially meet these criteria. In this study, new soluble copolymers PVK-F8T2 was synthesized from poly(9-vinylcarbazole) (PVK) and poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(bithiophène)] (F8T2). As these materials are highly luminescent and green-emitting, they have good chemical and thermal stability and can be easily functionalized. Here, the vibrational and optical properties of PVK-F8T2 was studied using several different techniques, including Infrared absorption, Raman scattering, thermogravimetric analysis (TGA), UV-visible optical absorption, and both stationary and transient photoluminescence. The novel copolymer shows an increase of thermal stability compared to the two original polymers (PVK and F8T2). The stationary and transient photoluminescence reveal an energy transfer from PVK to F8T2. This study indicates that these copolymers are good candidates for photophysical applications.
基于π共轭链合成新型荧光聚合物是有机电子领域的一项重大挑战。这些材料必须可溶、长期稳定且能够高产率生产。特别是，聚（乙烯基咔唑）、聚（芴）和聚（噻吩）部分满足这些标准。在本研究中，由聚（9-乙烯基咔唑）（PVK）和聚[（9,9-二辛基芴基-2,7-二基）-co-（联噻吩）]（F8T2）合成了新型可溶性共聚物PVK-F8T2。由于这些材料具有高发光性且发出绿色光，它们具有良好的化学和热稳定性，并且易于功能化。在此，使用几种不同技术研究了PVK-F8T2的振动和光学性质，包括红外吸收、拉曼散射、热重分析（TGA）、紫外-可见光学吸收以及稳态和瞬态光致发光。与两种原始聚合物（PVK和F8T2）相比，这种新型共聚物显示出热稳定性的提高。稳态和瞬态光致发光揭示了从PVK到F8T2的能量转移。这项研究表明，这些共聚物是光物理应用的良好候选材料。
