Self-assembled fluorescent Zn-MOF with high specific surface area based on the coordination interaction for sensitive detection and selective removal of tetracycline antibiotic in water

作者: Yao, Meng ; Zhang, Shun ; Cai, Lifeng ; Huang, Jing ; Zou, Hanxun ; Xu, Tangxuan ; Yang, Lei ; Zou, Ding ; Huang, Jianhui

As one of most common used antibiotics, tetracyclines (TCs) have been widespread used in many fields.However, the abuse of antibiotics resulted in serious environmental pollutants.Therefore, it is of great significance to develop new materials for rapid detection and effective removal of tetracyclines.In this study, a step-by-step synthesis strategy was adopted to prepare a fluorescent LMOF material Znq2@ZIF-8, and it was well characterized.Znq2@ZIF-8 showed strong green emission and has large sp. surface area, with excellent stability and good recyclability.The fluorescence of Znq2@ZIF-8 can be quenched with the addition of tetracycline (TC) in the aqueous environment, demonstrating good selectivity and strong interference resistance, with a limit of detection (LOD) of 0.13μmol•L-1.In addition, Znq2@ZIF-8 exhibits excellent adsorption and removal abilities for TC.As a result, Znq2@ZIF-8 enables the simultaneous detection and removal of TC in aqueous environments, providing a solution for future TC pollution in water.

2024-11-01·Crystal Research and Technology

Preparation and Photophysical Properties of Znq₂ Metallic Nanomaterials

作者: Huang, Xin ; Huang, Guiyi ; Li, Fulian ; Song, Yumin ; Ma, Penghui ; Long, Yunshuai

AbstractBis(8‐hydroxyquinolates) Zinc (Znq2) can be used as a light‐emitting layer material in OLED devices to achieve its efficient electroluminescence effect. In this paper, Znq2 powder has been successfully synthesized and modified by the physical vapor deposition (PVD) method. Precursors and nano‐materials are characterized by XRD, SEM, PL, and so on. The performance of the modified material has been significantly improved. The emission intensity and absorption intensity in the deposited products increased with the increase in PVD temperature. At 453 K, luminous properties such as luminous intensity reach the optimal value including its fluorescence lifetime. Fluorescence lifetime values vary from 13 to 17 ns with the increase in temperature. The luminescence mechanism is also discussed. The energy gap and absorption spectrum of HOM‐LUMO are calculated by the DFT/UB3LYP method. The experimental values agree well with the theoretical values. The nanomaterial crystals modified by PVD technology are more orderly, impurities are reduced, and the luminous stability of the material is improved, which may be one of the reasons for the relatively slow decline in product life. The research combined with theoretical simulation is expected to be helpful to the research and promotion of such materials.

2024-11-01·Optical Materials

Control of second-and third-order nonlinear optical properties of DCM and Znq2 composites fabricated by the physical vapor co-deposition process

作者: Plociennik, Przemyslaw ; Plociennik, Przemysław ; El kouari, Youssef ; El karout, Houda ; Sahraoui, Bouchta ; Belghiti, Amine Alaoui ; Wisniewski, Krzysztof ; Zawadzka, Anna ; Laouid, Amina ; Hajjaji, Abdelowahed

In the present work, investigations on the second and third-order NLO properties of, 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) reddye co-doped bis(8-hydroxyquinoline) Zinc (Znq₂) thin films with different concentrations were investigated.The samples have a thickness of 100 nm.They were prepared using the phys. vapor deposition (PVD) method under a high vacuum.The morphol. properties were studied by at. force microscopy.The second-order nonlinear susceptibility χ(2) after applying the corona poling technique was estimated using the comparative model of Lee, while the third-order nonlinear susceptibility χ(3) was estimated using the comparative model of Kubodera and Kobayashi.The tested samples varied in terms of the concentration of DCM in the structure, which visibly influenced their nonlinear response.The pure DCM thin film showed a large value of the second and third-order nonlinear susceptibility, while pure Znq2 had only the second harmonic response with a low value.In this study, we have demonstrated that doping with DCM, even with small concentrations, has also strongly enhanced the non-linearity of Znq2.The obtained results show that such compositions can be a good alternative for optoelectronic applications.

100 项与 Zinc oxinate 相关的药物交易

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