213600-35-2Relevant academic research and scientific papers
Heteroepitaxial Growth of Multiblock Ln-MOF Microrods for Photonic Barcodes
Yao, Yinan,Gao, Zhenhua,Lv, Yuanchao,Lin, Xianqing,Liu, Yingying,Du, Yuxiang,Hu, Fengqin,Zhao, Yong Sheng
, p. 13803 - 13807 (2019)
Micro/nanoscale multicolor barcodes with unique identifiability and a small footprint play significant roles in applications such as multiplexed labeling and tracking systems. Now, a strategy is reported to design multicolor photonic barcodes based on 1D Ln-MOF multiblock heterostructures, where the domain-controlled emissive colors and different block lengths constitute the fingerprint of a corresponding heterostructure. The excellent heteroepitaxial growth characteristics of MOFs enable the effective modulation of the coding structures, thereby remarkably increasing the encoding capacity. The as-prepared multicolor barcodes enable an efficient authentication and exhibit great potential in fulfilling the functions of anti-counterfeiting, information security, and so on. The results will pave an avenue to novel hybrid MOFs for optical data recording and security labels.
Fluorescence and electrochemical detection of iodine vapor in the presence of high humidity using Ln-based MOFs
Dong, Xiuting,He, Qing,Li, Menglin,Wang, Xinpeng,Wang, Yuxin,Zhang, Wen
, p. 15567 - 15575 (2021/12/02)
Efficient detection of toxic radioiodine species emitted by nuclear-related activities and accidents is crucial for the health of the human body and safety of the environment. Herein we report that a series of stable Ln-based MOFs with BTC linkers (Ln-BTCs) could provide dual fluorescence and electrochemical response of iodine vapor in the presence of humidity. Iodine molecules could be attracted by the oxygen sites of carboxylate linkers and confined in the cavities of Ln-BTCs. Due to the photoinduced electron transfer effect, the fluorescence of Ln-BTCs is quenched drastically in the presence of iodine. Meanwhile, the conductivity of Ln-BTCs could reach an increase of 107 fold in magnitude after iodine trapping. Water molecules could also be trapped in Ln-BTCs, having interacted with the frameworks via hydrogen bonds, and reduce the iodine uptake capacity, but they cannot alter the fluorescence and conductive properties of Ln-BTCs as distinctly as iodine molecules could. Besides, Raman mapping suggests a diffusion coefficient of 1.5 × 10-14 m2 s-1 for iodine transport in the porous Eu-BTC. The dual fluorescence and electrochemical signal outputs show high sensitivity and attractive ability to reduce false positives, which could be useful for potential integration for sensing radioiodine vapor. This journal is
Synthesis and characterization of rare earth complexes with benzene-1,3,5-tricarboxylic acid
Zhao, Guohu,Gao, Jinzhang,Zhao, Jun,Teng, Xiulan,Kang, Jingwan
, p. 1405 - 1414 (2008/10/09)
Benzene-1,3,5-tricarboxylic acid (TMA) and its mononuclear rare earth complexes were synthesized and characterized by elemental analysis, TG-DTA, IR, fluorescence spectroscopy and X-ray powder diffraction analysis. It was shown that the three-coordinated rare earth ion is the central ion and located in the centre of a ligand basket forming the clathrate solid compound.
