MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Junli Shi,Yongzheng Liu,Xianping Xin,Yue Zhao,Shengling Li,Hongxia Pan,Jun Chen,Duanlin Cao,Linxiu Zhao
The rapid detection of explosives is crucial for national security, public health, and environmental protection. In this study, a novel isophorone-based fluorescent compound, ( E )-2-(3-(2-(2-(dimethylamino)pyrimidin-5-yl)vinyl)-5,5-dimethylcyclohex-2-en-1-ylidene)malononitrile ( YMD ), was designed and synthesized. The structure of YMD was characterized by nuclear magnetic resonance (NMR), high-resolution mass spectrometry (HRMS), and X-ray single crystal diffraction. The detection limits for TNP and PYX were 13.88 μM and 15.59 μM, respectively. The probe exhibited a quick (within 10 s) and selective fluorescence quenching response to the explosives 2,4,6-Trinitrophenol (TNP) and 2,6-bis(picrylamino)-3,5-dinitropyridine (PYX), even in the presence of potential interferences. The mechanism can be attributed to synergistic effects involving multiple interactions, including photoinduced electron transfer (PET), inner filter effect (IFE), static quenching, and dynamic quenching. Remarkably, thanks to the excellent sensing properties of the YMD , it can be used for test strip testing. The YMD is capable of being applied to environmental water sample analysis and live intracellular imaging due to the mild detection system.
研究领域:
分析化学
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材料科学
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传感器
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安全检测
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环境监测
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2024
·
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
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
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
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
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
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Di Ma,Jingtao An,Xiaoming Huang,Minghao Zhai,Chunli Ma,Na Wei,Wanan Cai,Tingting Zhou,Haijun Niu
A diamine containing carbazole (Cz) and triphenylamine (TPA) groups, N-(4-(dibenzocarbazol-7-yl) phenyl)-N-(4-aminophenyl) benzene-1,4-diamine (DC7TPA-NH2), is designed and used to form three polyamides (PAs): DC7TPA-SA, DC7TPA-CA, and DC7TPA-OA through linear condensation with three dicarboxylic acids. The photophysical properties including UV–visible absorption spectra and photoluminescence (PL) emission spectra of three PAs are measured. Among them, DC7TPA-CA exhibits an intense PL emission. Upon comparison of UV–visible absorption spectra and PL emission spectra of DC7TPA-CA in diverse solvents, a consistent red shift in the PL emission peak is observed with increasing solvent polarity. Most notably, electrochromic (EC) performance testing revealed that this series of PA films exhibit optical contrast exceeding 90% and have good cycling stability. Specifically, the DC7TPA-SA film shows the highest optical contrast, reaching an impressive 95%. Meanwhile, due to the presence of ether oxygen bonds stabilizing free radicals, DC7TPA-OA demonstrates the best cycling stability among the three PAs. To further investigate its potential for application in EC smart windows (ECSWs), DC7TPA-OA is fabricated into an EC device (ECD). Testing reveals a maximum (initial) optical transmittance change (ΔT) of 88% with only a 3% decay after 240 cycles. Compared to other ECSWs, device of DC7TPA-OA consistently ranks among the top in terms of ΔT performance across all-most categories, whether inorganic ECDs, organic ECDs, COF-based ECDs or composite ECDs, and also demonstrates excellent response times and coloring efficiency (CE). Furthermore, the three PAs exhibit distinct color-changing behaviors, and DC7TPA-CA and DC7TPA-OA maintain a colorless neutral state. This property meets diverse application requirements, especially for ECSWs. Additionally, DC7TPA-CA possesses a high PL quantum efficiency (φ) and sensitivity to trinitrophenol (TNP), making it a promising candidate for nitroexplosive detection.
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Meiyi Liu,Weilian Zheng,Yi Yang,Ge Shi,Yining Li,Shuai Zhou,Yijian Zhao,Zhiyi Yao
2,4,6-trinitrophenol (TNP) is an environmentally deleterious substance with high toxicity and explosibility. It is of great significance for environmental protection and public health to establish a rapidly on-site monitoring method for perilous TNP. Current methods for detecting TNP mainly rely on traditional laboratory analysis lacking rapid detection through intelligent modes. Herein, we construct a smartphone recognition based fluorescence sensing system via the supramolecular assembly of a perylene probe to quantify TNP. The sensing platform consists of a fluorescent probe based on quaternary ammonium functionalized perylene (PDI-BTMA), as the TNP-response recognition element, and smartphones as optical signals receptors bringing simpleness, celerity, and portability for TNP monitoring. The sensor reveals dual output signals of color and fluorescence in response to TNP. The results show that the optical responses of PDI-BTMA can be attributed to the formation of the supramolecular complex (PDI-BTMA/TNP) via non-covalent interactions including static electricity, hydrophobic interaction, charge transfer, and π-π stacking. It shows a wide linear range for TNP of 200–1200 nM with a detection limit of 9 nM. In addition, we successfully made portable PDI-BTMA fluorescence paper. The RGB value of fluorescence color was also collected by using the smartphone-assisted sensing platform, and the G/B channel values show a linear relationship with TNP concentration in 0.1–50 μM, with the lowest detection concentration of 48.4 nM. Additionally, it could be successfully utilized for quantitative TNP monitoring in environmental water and soil samples, which achieved a greater recovery rate in the range of 99–110%. This research integrating the PDI-BTMA probe with a smartphone firstly presents a new strategy for real-time and on-site monitoring of TNP in the environment.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 30
·16603-16610
·
IF 2.936
Fangfang Li,Fengyi Wang,Xuan Hu,Baozhan Zheng,Juan Du,Dan Xiao
The detection of nitroaromatic explosives is important due to their strong explosive force and harmfulness in the environment, and for homeland security and public safety. Herein, a phosphorescence CaTiO3:Pr3+@SiO2 nanosensor was successfully developed for the sensitive and selective detection of 2,4,6-trinitrophenol (TNP). The red-emitting phosphorescent chemosensor CaTiO3:Pr3+@SiO2 possessed a long enough phosphorescence lifetime of 0.016 s. The TNP induced phosphorescence quenching process of CaTiO3:Pr3+@SiO2 presented a wide linearity with TNP concentrations ranging from 0.5 to 100 μM, and the detection limit was found to be 20.6 nM. Furthermore, this sensor displayed a high selectivity toward TNP over other structurally similar compounds like 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), 4-nitrotoluene (NT), 2,4-dinitrophenol (DNP), 4-nitrophenol (NP) and phenol. This sensing system was successfully used in the test of TNP concentrations in water samples, and showed great potential for practical application.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2026
·
IF 3.9
Chen Wang,Xing-Jing Zhang,Li-Na Zhao,Ting Zhang,Feng-Ying Bai,Yong-Heng Xing
The development of TNP sensors for one-stop real-time detection is crucial for understanding water environments and maintaining human health and safety. However, one of the main obstacles that hindering the development of on-site detection technology in the future is the complexity of the detection environment. Here, in this work, a novel metal-organic framework (MOF) Eu-tcbpe designed with H 4 tcbpe (H 4 tcbpe = 4′,4‴,4‴,4′‴-(ethene-1,1,2,2-tetrayl)tetrakis(([1,1′biphenyl]-4-carboxylic acid))) and Eu 3+ was synthesized. This complex exhibited anti-interference, sensitive, and rapid detection capabilities with the limitation of detection of 0.42 mg/L for TNP. In order to realize real-time portable detection, a hydrogel sensing platform with Eu-tcbpe and methyl red was designed and prepared. This platform retains all the features of Eu-tcbpe . Combining it with smartphone can perform real-time detection towards TNP. It could be found that two independent colorimetric and fluorescent channels on the sensor exhibited specific responses to TNP under sunlight and fluorescence irradiation, respectively. Furthermore, by utilizing the principle of strong electrostatic interaction, the cationic dye safranin T (ST) was encapsulated into Eu-tcbpe with an anionic framework, achieving tunability of the fluorescence color of Eu-tcbpe . This work is expected to provide research ideas for advancing the detection of MOFs in fluorescence sensing and the practical application of MOFs as multi-color luminescent materials.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
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
·
纳米技术
·
分析化学
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Immunology
·
2019
·
IF 4.716
Wu Liting,Fu Shengli,Yin Xiaoxue,Guo Zheng,Wang Anli,Ye Jianmin
The recent discovery of long-lived plasma cells (LLPCs) in mammals, which provide a constant expression of specific high-affinity antibodies that mediate humoral memory, has caused a dramatic paradigm shift in the study of immunity and vaccine development. In teleost fish, there are few studies regarding the association between LLPCs and antibody production, and the affinity of the antibodies secreted by the LLPCs is poorly understood. In the present study, channel catfish (Ictalurus punctatus) were immunized with trinitrophenylated-keyhole limpet hemocyanin (TNP-KLH) to examine TNP-specific antibody titers, affinities, antibody-secreting cell (ASC) dynamic changes, and especially the affinity of secreted antibodies by LLPCs post-immunization. We demonstrated that TNP-specific LLPCs were generated starting at week 4 post-immunization, achieved a maximal number at week 8, and maintained a comparable level throughout the 18-week post-immunization period, which was correlated with the dynamics of serum antibody titers and affinity maturation in the response. The LLPCs appeared to mostly reside within, or migrate to, the anterior kidney (bone marrow-like tissue in mammals), but a small portion was also located in the spleen and peripheral blood. The antibodies produced by the LLPCs possessed high affinities, indicating that the generation and development of LLPCs were driven by affinity selection in teleosts. Collectively, the results of this study provide insights toward the evolutionary understanding of the affinity-dependent mechanism of LLPC generation and development.
研究领域:
免疫学
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兽医学
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水生生物学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Ligui Wu,Qiaofeng Wu,Jingcheng Xu,Lingling Rong,Xiaoli Yu,Chen Cai,Xiangfeng Huang,Xiaoming Zou
The effects of antibiotics on the proliferation of antibiotic resistant genes (ARGs) in WWTPs have drawn great attention in recent years. The effects of antibiotics on ARGs in the enhanced biological phosphorus removal (EBPR) system and its mechanisms, however, are still not well understood. In this study, EBPR systems were constructed using activated sludge to investigate the effects of ten commonly detected antibiotics in the environment on the proliferation of ARGs and the mechanisms involved. The results showed that the total abundance of ARGs increased to varying degrees with the addition of different antibiotics (0.05 mmol/L), and the top 30 ARGs increased by 271.1 % to 370.0 %. Mobile genetic elements (MGEs), functional modules, and the bacteria community were consistently related to the changes in ARGs. Refractory antibiotics, in particular, have a stronger promoting effect on transduction in the EBPR system. The insertion sequence common region (ISCR) and transposon (Tnp) were identified as crucial factors in the proliferation of ARGs. Moreover, the risk of polyphosphate accumulating organisms (PAOs) carrying ARGs in the presence of antibiotics should not be ignored. Our findings emphasize the potential efficacy of employing strategies that target the reduction of MGEs, regulation of cellular communication, and management of microbial communities to effectively mitigate the risks associated with ARGs.
研究领域:
环境工程
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微生物学
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污水处理
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遗传学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 29
·7083-7092
·
IF 5.066
Yajiao Song,Jianhua Lü,Bingxin Liu,Changli Lü
Thermo-responsive block copolymer brushes of PNIPAM-b-P(MQ-co-GMA) were successfully grafted from graphene oxide (GO) by consecutive reversible addition–fragmentation chain transfer (RAFT) polymerization based on the monomers of N-isopropylacrylamide (NIPAM), 5-(2-methacryloyl-ethyloxymethyl)-8-quinolinol (MQ) and glycidyl methacrylate (GMA). The 8-hydroxyquinoline units in the polymer brushes could coordinate with Al3+ to form green luminescent copolymer brushes containing tris(8-hydroxyquinoline)aluminum (Alq3) on the GO surface. The resulting fluorescent hybrid could be used as a nano-platform for the sensitive and robust detection of 2,4,6-trinitrophenol (TNP). The green fluorescence of the polymer brush modified GO hybrid in aqueous solution could be quenched by TNP via charge transfer and the observed linear fluorescence intensity change allowed the quantitative detection of TNP with a detection limit down to 2.38 × 10−9 M. The fluorescent nanohybrids exhibited a robust temperature-responsive behavior as a result of the conformation change in PNIPAM chains of polymer brushes.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）