Vlasyuk Dmytro, Łyszczek Renata, Podkościelna Beata, Puszka Andrzej, Hnatejko Zbigniew, Stankevič Marek, Głuchowska Halina
Department of General and Coordination Chemistry and Crystallography, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. C. Skłodowskiej Sq. 2, 20-031 Lublin, Poland.
Department of Polymer Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, Gliniana 33, 20-614 Lublin, Poland.
Materials (Basel). 2023 Sep 30;16(19):6509. doi: 10.3390/ma16196509.
A series of homogeneous hybrid BPA.DA-NVP@EuL materials were obtained through an in situ approach where the luminescent dopant was formed at the molecular level with different contents (0.1; 0.2; 0.5; 1; and 2% by weight). A Europium(III) complex (EuL) with quinoline-2,4-dicarboxylic acid was applied as a luminescence additive while a polymer matrix consisted of a combination of bisphenol A diacrylate (BPA.DA) and N-vinylpyrrolidone (NVP) monomers. Synthesis steps and the final materials were monitored by NMR and Fourier transform infrared spectroscopy (FTIR). The emission, excitation spectra, lifetime, and quantum yield measurements were applied for the determination of the photophysical characteristics. The thermal and mechanical properties of the obtained materials were tested via thermal analysis methods (TG/DTG/DSC and TG-FTIR) in air and nitrogen atmospheres, dynamic mechanical analysis (DMA), and hardness and bending measurements. Generally, even a small addition of the metal complex component causes changes in the thermal, mechanical, and luminescent properties. Hybrid materials with a greater europium complex content are characterized by a lower stiffness and hardness while the heterogeneity and the flexibility of the samples increase. A very small amount of an EuL admixture (0.1% wt.) in a hybrid material causes an emission in the red spectral range and the luminescence intensity was reached for the BPA-DA-NVP@1%EuL material. These materials may be potentially used in chemical sensing, security systems, and protective coatings against UV.
通过原位方法获得了一系列均匀的杂化BPA.DA-NVP@EuL材料，其中发光掺杂剂在分子水平上以不同含量（0.1%、0.2%、0.5%、1%和2%重量）形成。以喹啉-2,4-二羧酸铕（III）配合物（EuL）作为发光添加剂，聚合物基体由双酚A二丙烯酸酯（BPA.DA）和N-乙烯基吡咯烷酮（NVP）单体组合而成。通过核磁共振（NMR）和傅里叶变换红外光谱（FTIR）监测合成步骤和最终材料。应用发射光谱、激发光谱、寿命和量子产率测量来确定光物理特性。通过在空气和氮气气氛中的热分析方法（TG/DTG/DSC和TG-FTIR）、动态力学分析（DMA）以及硬度和弯曲测量来测试所得材料的热性能和力学性能。一般来说，即使少量添加金属配合物组分也会导致热性能、力学性能和发光性能发生变化。铕配合物含量较高的杂化材料具有较低的刚度和硬度，而样品的不均匀性和柔韧性增加。杂化材料中极少量的EuL混合物（0.1%重量）会在红色光谱范围内产生发射，并且BPA-DA-NVP@1%EuL材料达到了发光强度。这些材料可能潜在地用于化学传感、安全系统和抗紫外线防护涂层。
