Isolation strategy for a novel luminescent Eu3+-pyridine-2,6-dicarboxylic acid complex with high compatibility and stability for light-conversion agricultural films
文献类型： 外文期刊
作者： Zhang, Maolin 1 ; Zhao, Chipeng 1 ; Song, Ji-Qing 1 ; He, Wen-Qing 1 ; Zhao, Peiyi 2 ; Liu, Jialei 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
2.Inst Resources Environm & Sustainable Dev, Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot 010031, Peoples R China
期刊名称：MATERIALS CHEMISTRY FRONTIERS （ 影响因子：8.683； 五年影响因子：7.988 ）
ISSN：
年卷期： 2022 年 7 卷 1 期
页码：
收录情况： SCI
摘要： Small organic conjugated molecule-based rare earth complexes are a kind of promising light-conversion material used in greenhouse films to improve the crop yield. Unfortunately, achieving a high luminescent performance of this kind of light-conversion material with a low migration rate in the film is still a big challenge. It has been predicted that increasing the interaction between the luminescent complex and polymer backbone could reduce the migration rate of the complex. Herein, we bridged two pyridine-2,6-dicarboxylic acid derivatives coordinated to Eu3+ luminescent centers using different lengths of the alkyl chain. Then, two new light-conversion agents, LDPA-4 (four carbon atoms) and LDPA-6 (six carbon atoms), were prepared. Using this strategy, we achieved a 615 nm red-light emission quantum yield (QY) of 13.16% for LDPA-6, which was much higher than that of LDPA-4 (5.28%) and the reference sample LCA-C (10.77%), respectively. In the resulting light-conversion films, rape samples treated with LDPF-6 exhibited the largest growth rate and yield of 2482.8 kg ha(-1) during the experimental plot application, which was 1.15 times higher than that of the pure PE one, demonstrating the special ligand effect of the pyridine-2,6-dicarboxylic acid and the importance of the alkyl chain length between the two luminescent centers.
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