SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Zhihua Li,Lin Chen,Jiaxi Deng,Jing Zhang,Cailin Qiao,Mei Yang,Guoren Xu,Xiaogang Luo,Danqun Huo,Changjun Hou
Water contamination caused by heavy metals represents an urgent global issue. Cu 2+ , a potential trace heavy metal pollutant, can accumulate in the human body through the food chain, leading to excessive levels that give rise to diverse health complications. Hence, in this investigation, a novel and efficacious fluorescent probe named Eu-BTB was developed for the detection of Cu 2+ , employing 1,3,5-triphenyl(4-carboxyphenyl) (H 3 BTB) as the ligand and Eu 3+ as the metallic framework. The probe demonstrates exceptional fluorescence characteristics. The interaction between the probe ligand BTB and Eu 3+ triggers an antenna effect, heightening the emission efficiency of Eu 3+ while preserving its intrinsic emission. The introduction of Cu 2+ competes with BTB for binding, thus quelling the antenna effect and inducing a fluorescence alteration. Within the concentration range of 0.05–10 μM, the fluorescence intensity-to-Cu 2+ concentration ratio exhibits a robust linear correlation, with a remarkably low detection limit of 10 nM and a rapid response time of 3 min. The fluorescent probe has been effectively deployed for the detection of copper ions in water across diverse environmental conditions, with the obtained outcomes being validated via the conventional approach of inductively coupled plasma mass spectrometry (ICP-MS). The Eu-BTB probe showcases the advantages of simplicity, swiftness, and broad applicability, thus affirming its potential for the prompt and accurate detection of Cu 2+ in diverse environmental water samples.
研究领域:
环境科学
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Jialong Pang,Yali Liu,Chuanfang Zhao,Jiawen Li,Mengting Ran,Baiyi Zu,Xincun Dou
The structural modification of metal–organic frameworks (MOFs) is of vital importance in many fields, especially in sensing with enhanced performance, while the efficient synthesis of functionalized MOF nanoparticles toward small molecule detection remains challenging. Here, a general cellulose nanofibril (CNF)-induced in situ one-step strategy was proposed for the synthesis of dual-ligand-functionalized europium-based MOF (EuMOF@CNF) nanoparticles under an effective regulation of the crystallization kinetics in hydrothermal synthesis. Based on the unique dual-ligand structure, the obtained EuMOF featured a tunable antenna effect and laid a good foundation for fluorescence-sensing materials. Benefiting from the superior self-assembly properties of CNFs and the tunable antenna effect of EuMOF@CNF, flexible sensing films were constructed, showing excellent mechanical properties (72 MPa for stress and 3.8% for strain) and tunable luminescence properties and achieving instant (1 s) and sensitive fluorescence sensing of sarin analogue vapor with a significantly low limit of detection (LOD, 2.8 ppb) and robust selectivity against a wide range of common interferents (>14 types), especially independent of common acids. We believe that this pioneering design of EuMOF with tunable antenna effects would positively advance the development of high-performance MOF-based fluorescent materials and devices.
研究领域:
材料科学
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化学传感器
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2024
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IF 4.4
Jie Wang,Ya-Nan Yu,Rou Huang,Ce Wang,Zheng Yin
Mix-ligands strategy is highly efficient for the rational construction of MOFs with particular structure motifs and high porosity, yet challenging and requiring matching in hierarchical coordination assembly and synergetic crystallization. The solvothermal reactions of 1,3,5-tris[4-carboxyphenyl]benzene (H 3 btb) and 1,4-benzenedicarboxylic acid (H 2 bdc) with different 3d metal ions , generated highly porous mixed-ligands MOFs of [(CH 3 ) 2 NH 2 ] 2 [Mn 3 (btb) 2 (bdc)]·12DMF·3MeOH ( Mn-btb-bdc ) having anionic 3D frameworks constructed from linear [Mn 3 (COO) 8 ] nodes, [Co 4 (btb) 2 (bdc)(H 2 O) 3 ]·15DMF·7H 2 O ( Co-btb-bdc ) processing neutral frameworks constituted by linear [Co 3 (COO) 6 (H 2 O) 4 ] and paddle-wheel [Co 2 (COO) 4 (H 2 O) 2 ] nodes, as well as one single-ligand MOFs of [(CH 3 ) 2 NH 2 ][Cd(btb)(H 2 O)]·8DMF ( Cd-btb-2fold ) exhibiting 2-fold interpenetrated ths net frameworks due to the unsuccessful introduce of the coexisted bdc ligand. Two new topology net of 2,3,8-connected net with point symbol of (4 2 ·6) 2 (4 4 ·6 6 ·8 12 ·10 5 ·12)(6) and 2,3,4,6-connected net with Point Symbol of (4·8 2 ) 4 (4 2 ·8 11 ·10 2 ) 2 (8 4 ·12 2 )(8 2 ) were found for Mn-btb-bdc and Co-btb-bdc . All these three MOFs are highly porous with void fractions of 60.9%, 52.2% and 61.4%, stemming from 3D-penetrated, 3D-penetrated and 1D channels, respectively. Such structural differentiations are attributed to the diversified electronic structure and coordination preference of different 3d metal ions, as well as the solvent template and temperature effects. Two-steps gate-opening behaviour in gas sorption isotherms was found in the flexible Mn-btb-bdc MOFs.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）