文献类型：期刊文献

英文题名：Temperature-modulated porous gadolinium micro-networks with hyperchrome-enhanced fluorescence effect

作者：Chen, Bin-Bin[1];Chang, Shuai[1];Lv, Jian[1];Qian, Ruo-Can[1];Li, Da-Wei[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Frontiers Sci Ctr Mat & Dynam Chem, Key Lab Adv Mat,Feringa Nobel Prize Scientist Joi, Shanghai 200237, Peoples R China

年份：2021

卷号：422

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20212410508334);WOS:【SCI-EXPANDED(收录号:WOS:000669703700003)】；

基金：Funding Information This research was supported by the National Natural Science Foundation of China (21977031, 21788102, 21777041, 21974046) , the Shanghai Science and Technology Committee (17520750100, 19391901700, 19520744000 and 19ZR1472300) and the Fundamental Research Funds for the Central Universities.!

语种：英文

外文关键词：Gadolinium micro-networks; Hyperchrome-enhanced fluorescence; Temperature-modulated pore structure; Peroxidase-like catalysis; White light-emitting diodes

摘要：Porous and luminescent functional materials having well-controlled morphology are crucial in the field of adsorption, catalysis, and drug release. Herein, we propose the mechanism of hyperchrome-enhanced fluorescence (HEF) for the synthesis of highly fluorescent gadolinium micro-networks (Gd-MNs) via a facile one-pot hydrothermal treatment of almost non-luminescent Gd3+ ions / citric acid (Gd3+/CA) complexes. It is found that after high-temperature polymerization, a strong pi-pi* transition occurs in the Gd-MNs, which significantly enhances the absorption of light. So, our proposed HEF effect as a new photoactivation strategy can efficiently improve the fluorescence (FL) emission of optical materials by creating a large pi-conjugated structure. Surprisingly, the FL of Gd-MNs is 152 times higher compared to that of Gd3+/CA complexes. In particular, porous Gd-MNs (P-Gd-MNs) having tunable porosity can be obtained by changing the reaction temperature, as the formation of the porous structure is strongly dependent on the release of H2O molecules, coordinated with Gd3+ ions. Because of their porous structure and good FL properties, P-Gd-MNs is an ideal material for white lightemitting diodes (WLEDs) with adjustable correlation color temperature, by embedding fluorescent carbon dots into their pores. Besides, P-Gd-MNs can also be transformed into a peroxidase-like catalyst by directly reducing the Cu2+ ions of the porous surface. Moreover, Cu coated P-Gd-MNs can also be used for catalysing the degradation of rhodamine 6G dye with a degradation efficiency of about 100%. Hence, the facile synthesis of P-GdMNs opens new avenues for its potential applications in WLEDs fabrication and biocatalysis.