MICROPOROUS AND MESOPOROUS MATERIALS
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2024
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IF 4.8
Di-Ming Chen,Han-Dong Qiao,Cong-Li Gao,Shao-Ming Fang
Metal-organic frameworks (MOFs) have emerged as a multi-functional platform for selective gas capture and luminescent detection of harmful pollutants, in which their pore functionality and structural stability are two key factors to be considered for the targeted applications. In this contribution, we present the synthesis and structural evaluation of a new channel-type MOF formulated as {[In 3 (OH) 3 (TATAB) 2 ](DMA) 8 (CH 3 CN) 6 (H 2 O) 2 } n ( 1 , DMA is short for N,N-dimethylacetamide and TATAB is the abbreviation of 4,4′,4″-s-triazine-1,3,5-triyl-p-aminobenzoate) constructed from rod-like [In-(OH)-(COO) 2 ] n chains and the N-rich fluorescent triazine ligand H 3 TATAB. The noninterpenetrated framework of 1 features 1D rhombic channels (13.1 × 14.2 Å 2 ) along the c axis with abundant of free N sites on the pore walls. The solvent-removal framework of 1 ( 1a ) could adsorb large amount of C 2 H 2 (154 cm 3 /g) at 298 K and 1 bar with a moderate C 2 H 2 /CO 2 selectivity (3.7), and its separation performance has been further validated via the break-through experiments. Aqueous-phase sensing experiments demonstrate this MOF exhibits excellent performance of fluorescent detection of 2,4,6-trinitrophenol (TNP) via remarkable fluorescence quenching and obvious blue-shift of maximum emission. In connection to the sensing experiments, we used DFT calculations to reveal the underlying mechanism of such sensing performances via analyzing the energy lever together with electron transfer route.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2021
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IF 3.498
Han Zhang,Guan-Yu Ding,Afifa Yousaf,Li Chen,Xin-Long Wang,Guo-Gang Shan,Chun-Yi Sun,Zhong-Min Su
Luminescent sensors have received extensive attention due to their fast-response and easy-operation and when integrating multifunctions in a sensor, the cost will be reduced substantially. Covalent organic polymers (COPs) as multifunctional luminescent sensor with outstanding performance are still underexplored. In this work, a typical COP named as COP-2 show preponderant performance in the detection of Fe 3+ , MnO 4 − , and TNP. COP-2 has the highly efficient ability to selectively detect Fe 3+ among the other metal ions , and the limit of the detection (LOD) is 0.89 μ M, which outperforms the reported covalent organic materials. Anion sensing shows the COP-2 has the highly anti-interference ability and recyclicity to detect MnO 4 − . Explosive analogs sensing demonstrates that COP-2 owns the superior ability in sensing TNP in the knockdown concentration with 0.0067 ppm LOD, which superior to the values in the reported literature. In addition to the above superb sensing performance, COP-2 can be utilized as a white light-emitting diode (WLED) when combined with the commercial blue emission LED and presents a Commission Internationale de l’Eclairage (CIE) coordinate of (0.31, 0.32). These results show the COP-2 not only has an appealing performance in multifunctional luminescent sensing application, but also has a possible application in white light emitting.
研究领域:
材料科学
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化学传感
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光学器件
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Feifei Zhao,Tianyi Zhang,Qian Liu,Changli Lü
For most of the carbon dots (CDs), solid-state fluorescence and room temperature phosphorescence (RTP) are difficult to achieve due to self-quenching and intersystem crossing (ISC) limitations. Here, nitrogen-doped CDs-1 showing both fluorescence and RTP was obtained by hydrothermal reaction from polyvinyl alcohol (PVA) and 5-amino-1,10-phenanthroline (Aphen). The CDs-1 emits blue-green fluorescence in aqueous solution, while emits white fluorescence and yellow-green RTP in the solid state with a RTP lifetime up to 103 ms, exhibiting a long afterglow with a duration of 3 s, which is visible to the naked eyes. The RTP of the CDs-1 is derived from the C N/C N in Aphen and C N/CN in Aphen and C O produced during the carbonization process with a small energy gap between the singlet and triplet states, which helps to realize the ISC. At the same time, the hydrogen bonds between the C N/CN or CO bonds and O H of the not completely carbonized PVA chains on the CDs-1 surface have the advantages of moisture resistance, oxygen barrier and improving the rigidity of CDs-1. Eventually, non-radiative transitions can be suppressed. Based on the decent fluorescence properties, the aqueous solution of CDs-1 can be used to detect TNP and is responsive to pH with a good linear relationship between acid and alkali. In addition, the RTP of CDs-1 can be utilized as banknote anti-counterfeiting material under a long excitation wavelength. This work provides a possibility to realize the multi-mode illumination regulation of CDs by facile one-step strategy.
研究领域:
材料科学
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化学
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纳米技术
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分析化学
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光学材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Chen Wang,Xing-Jing Zhang,Li−Na Zhao,Ting Zhang,Feng-Ying Bai,Li-Xian Sun,Yong-Heng Xing
The abuse and excessive discharge of organic pollutants such as nitroaromatic compounds (NACs) have become a hot topic of concern for all humanity and society, and the development of fast, effective, and targeted technical means for detecting NACs also faces many challenges. Here, we reported a strontium-based metal–organic framework (MOF) {[Sr2(tcbpe)(H2O)4]}n (Sr-tcbpe), in which tcbpe represents deprotonated 4′,4‴,4″‴,4‴‴-(ethene-1,1,2,2-tetrayl)tetrakis(([1,1′biphenyl]-4-carboxylic acid)). In Sr-tcbpe, Sr–O polyhedron and deprotonated tcbpe4– ligand have a staggered connection to form a self-assembled three-dimensional network structure. In addition, it is found that Sr-tcbpe undergoes no luminescent color change when grinding under solvent protection, while mechanochromic fluorescence behavior is observed when grinding directly, leading to luminescent color changes from cyan to green (Sr-tcbpe-G). Additionally, Sr-tcbpe and Sr-tcbpe-G could selectively detect PNP, DNP, and TNP, and Sr-tcbpe achieves visual fluorescence sensing detection toward TNP at a limit of detection as low as 2.25 μM. Moreover, during the detection process, unexpectedly, TNP exhibits a selective etching effect on Sr-tcbpe, which could drill nano holes with different sizes on the surface area of MOF materials to a certain extent, achieving the conversion of chemical energy to mechanical energy. In addition, the successful preparation of a portable sensor Sr-tcbpe@gypsum block provides a platform for the perfect combination of mechanochromic fluorescence behavior and visualization detection toward TNP. It lays the foundation for the practical application of MOF materials in daily life.
研究领域:
材料科学
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分析化学
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环境科学
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传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）