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28. Introduction of Organic Dyes into Cadmium(II) MOF for Tunable Light Emission and Highly Sensitive Probing Antibiotics.

Author

Wu, Haozhen, Yang, Guo‐Ping, and Wang, Yao‐Yu

Subjects
FLUORESCENCE resonance energy transfer, CADMIUM, LUMINESCENCE, COORDINATION polymers, RHODAMINE B, ORGANIC dyes, METAL-organic frameworks
Abstract

A honeycomb porous cadmium(II) metal–organic framework {[Cd(L)(H2O)] ⋅ NMP ⋅ 5H2O}n (1, H2L=1‐(4‐carboxyphenyl)‐1H‐pyrazole‐3‐carboxylic acid and NMP=1‐methyl‐2‐pyrrolidinone) was obtained using the solvothermal method. The luminescent molecules rhodamine B (RhB) and fluorescein (FL) were encapsulated in 1 using the immersion method to prepare RhB@1 and FL@1 dual emission composites. Additionally, a series of RhBx/FL1‐x@1 composites with varying luminescence properties were generated by altering the molar ratio of RhB to FL. Furthermore, the photoluminescence of RhB@1 and FL@1 was demonstrated to be caused by photoelectron transfer and fluorescence resonance energy transfer from 1 to the encapsulated guest module. Notably, RhB@1 showed the considerable improvement in fluorescence selectivity and detection limit (10−6 M) for metronidazole and dimetronidazole with remarkable recyclability. [ABSTRACT FROM AUTHOR]

Published
2024
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32. Impact of blockchain technology on the optimal pricing and quality decisions of platform supply chains.

Author

Tao, Feng, Wang, Yao-Yu, and Zhu, Shi-Hu

Subjects
BLOCKCHAINS, PRICES, SUPPLY chains, WHOLESALE prices, PRICE levels
Abstract

We investigate how blockchain technology influences optimal pricing and quality decisions under two different supply chain structures. In both cases, the supplier is the leader and plays a Stackelberg game with downstream platform(s). Specifically, the supplier determines the wholesale prices and quality levels of the products, and the platform(s) decides the selling prices. Based on our analysis, we find that when consumer acceptance of blockchain is low, among the two products in the single platform, the products with blockchain technology have not only a high quality but also a low price. However, in the case of the two competitive platforms, although blockchain will also enable the platform that uses this technology to provide products with a high quality and low price, its advantages are not obvious. Nevertheless, in comparing the two cases, when consumer acceptance is high, the two competing platforms tend to provide products with a high quality and low price, regardless of whether or not the products use blockchain technology. Our conclusions reveal that although blockchain will benefit a supplier and consumers, in some cases, the supplier will have an incentive to decrease the quality level of the products with blockchain technology, which will eventually negatively affect consumers. [ABSTRACT FROM AUTHOR]

Published
2023
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41. Robust lanthanide MOFs as multifunctional luminescent sensors for intelligent visualization monitoring of MEAA and texture code anti-counterfeiting applications.

Author

Yang, Hui-Min, Yang, Guo-Ping, and Wang, Yao-Yu

Abstract

2-(2-Methoxyethoxy)ethanol (MEEA) can cause DNA damage and teratogenesis, and the biomarker of MEEA is 2-(2-methoxyethoxy)acetic acid (MEAA). Therefore, portable and accurate monitoring of MEAA has far-reaching significance to ensure human health. In this work, a series of isometric three-dimensional (3D) lanthanide metal–organic frameworks (Ln-MOFs) {[Ln0.5(L)(H2O)]·1.5H2O}n (1-Ln, Ln = Eu, Tb, EuxTb1−x) were synthesized by using 1-(4-carboxyphenyl)-1H-pyrazole-4 carboxylic acid (H2L) and Ln3+. 1-Eu showed excellent sensing performance for MEAA with ultra-low detection limit (0.39 μM) and fast response time (within 1 min). To enhance the practicability of 1-Eu, three visual detection strategies of MEAA were provided. The polytetrafluoroethylene (PTFE) fluorescence film (Film@1-Eu) had a detection limit as low as the ppm level, and the fluorescence test paper achieved quantitative MEAA detection by combining with a smartphone sensing platform. In addition, a portable intelligent logic detector based on 1-Eu was designed by introducing a logic gate strategy for the real-time detection of MEAA. Notably, a Ln-MOF texture code with a high encryption algorithm and information density was designed for anti-counterfeiting labels on merchandise, utilizing the distinctive tuneable emission characteristic of 1-Ln. This study not only achieved the first visual detection of MEEA but also provided novel insights for the design of anti-counterfeiting materials. [ABSTRACT FROM AUTHOR]

Published
2024
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