SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Hua Liang,Zongchen Li,Daqiang Wu,Ke Dai,Luyao Zhong,Yonggang Liu,Minhao Yan,Xianguo Tuo
Structure is a crucial factor to decide the selectivity and sensitivity of chemosensors. In this work, a diacylhydrazone 2a and its congeneric derivatives 2b-2d were synthesized and their applications for Al 3+ detection were investigated. Except 2d , all the other compounds exhibit notable turn-on fluorescence toward Al 3+ over 15 other metal ions and the sensitivities of 2b and 2c are even higher after modification, illustrating ortho -OH indispensability in their structures for sensing. Reversibility investigation shows that the sensors all have regeneration ability. Meanwhile, the sensor-Al 3+ systems show selective fluorescence turn-off for Cu 2+ , providing a potential platform for tandem recognition of Al 3+ and Cu 2+ . 2a as a standard, shows a 1:2 molar ratio to Al 3+ confirmed by Job’s plot, 1 H NMR spectra and mass spectra, and its detection limit for Al 3+ is 7.63 nM in ethanol. It has relevant sensitivity over pH 3-9, with the highest sensitivity at around pH 4. Apart from Al 3+ detection, anion selectivity was also explored and it shows that 2a , 2b and 2c all have selectivity toward CN − evidenced by UV-vis spectra.
研究领域:
化学传感器
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分析化学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Kuiling Wei,Xuejuan Cao,Yan Wu,Boming Tang,Bailin Shan,Xinqiang Zhang
In recent years, self-healing waterborne polyurethanes (SWPUs) with stimuli-responsive properties have attracted increasing attention. It is critical that dynamic crosslinking networks are designed to respond to appropriate stimulus. In this work, the effects of disulfide bonds, acylhydrazone bonds, and intrinsic hydrogen bonding on the mechanical properties, self-healing performance, and degradation behavior of SWPUs were explored. Initially, disulfide bonds were introduced into the crosslinked networks through a simple chemical modification of cystamine dihydrochloride, providing a cost-effective alternative to typical disulfide bond monomers. Subsequently, bio-based vanillin was used to cap isocyanate groups at ratios of 0.25, 0.5, 0.75, and 1.0, creating reactive sites for the condensation of diacylhydrazine with carbonyl groups. By adjusting the end-capping ratios, varying concentrations of acylhydrazone bonds were incorporated into the networks. The results indicated that increasing the end-capping ratio led to >83.4 % self-healing efficiency of SWPUs under both thermal and acidic conditions. The disordered hydrogen bonds improved the fracture strength of SWPUs, while the ordered hydrogen bonds enhanced the stiffness during stretching. In addition, the degradation test results revealed that SWPU was fully decomposed in a THF solvent (2-mercaptoethanol/deionized water/THF = 2/2/8, volume ratio). This excellent degradability is primarily attributed to the combined effects of imine hydrolysis, dynamic disulfide bonds, and copolymer fragmentation at single bonds near the carbonyl groups. This work presents a novel approach for designing polyurethane elastomers with multiple dynamic adaptive networks, offering the potential for low-cost production and cleaner preparation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Hui Xiong,Hua Liang,Ke Dai,Qiang Tian,Xuezhi Dai,Haifeng Su,Guy Royal
Thorium, as a radioactive element, is always associated with rare earth in nature. So it is an exacting challenge to recognize thorium ion (Th 4+ ) in the presence of lanthanide ions because of their overlapping ionic radii. Here three simple acylhydrazones ( AF , AH and ABr , with the functional group fluorine, hydrogen and bromine, respectively) are explored for Th 4+ detection. They all exhibit excellent “turn-on” fluorescence selectivity toward Th 4+ among f-block ions in aqueous medium with outstanding anti-interference abilities, where the coexistence of lanthanide and uranyl ions in addition with other ordinary metal ions have negligible effects during Th 4+ detection. Interestingly, pH variation from 2 to 11 has no significant influence on the detection. Among the three sensors, AF displays the highest sensitivity to Th 4+ and ABr the lowest with the emission wavelengths in the order of λ AF -Th < λ AH -Th < λ ABr -Th . The detection limit of AF to Th 4+ can reach 29 nM (pH = 2) with a binding constant of 6.64 × 10 9 M −2 . Response mechanism for AF toward Th 4+ is proposed based on the results of HR-MS, 1 H NMR and FT-IR spectroscopies together with DFT calculations. This work provides important implications on the development of related series of ligands in nuclide ions detection and future separation from lanthanide ions.
研究领域:
分析化学
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放射化学
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配位化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Pang Shukui,Yu Yanchao,Yan Xuexue,Wu Mianyuan,Liu Qiye,Zu Panru,Wu Canyao
A novel coumarinylhydrazone fluorescent probe L was designed and synthesized from 4-(diethylamino)salicylaldehyde, its structure was characterized by NMR, IR. Fluorescence emission spectra showed that in ethanol solution, probe L could form a 1:1 complex L-Cu 2+ with Cu 2+ to realize the "turn-off" detection of Cu 2+ with high specificity and sensitivity (3.7 × 10 –7 mol/L). Meanwhile, the complex L-Cu 2+ had a specific fluorescence-enhanced response to HPO 4 2− with a detection limits down to 5.6 × 10 –7 mol/L and was resistant to the effects of many common anions (NO 2 − , N 3 − , CO 3 2− , SO 3 2− , HPO 4 2− , I − , Br − , F − , HCO 3 − , SO 4 2− , NO 3 − , Cl − , CH 3 COO − , Cr 2 O 7 2− , S 2 O 3 2− , P 2 O 7 4− ). Detection mechanism could be HPO 4 2− captured Cu 2+ of the complex and released the free ligand L. At last, the complex L-Cu 2+ was successfully applied to the determination of HPO 4 2− in different environmental water samples, and the spiked recoveries ranged from 98.05% to 108.18% and the relative standard deviations of 0.75% ~ 2.9%, which had good application prospects. Graphical A new coumarin acyl hydrazone fluorescent probe L was designed and synthesized, which could specifically recognize Cu2+ and HPO42- in a relay manner. In addition, the probe had good prospects for practical applications.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Liyuan Qiao,Chengde Liu,Cheng Liu,Lishuai Zong,Hongjian Gu,Chenghao Wang,Xigao Jian
Smart hydrogels have wide potential in biological field owing to their self-healing property, pH or temperature sensitivity. However, the preparation of smart hydrogels often requires complicated synthesis process, and the single functionality of hydrogels might limit their application. To solve these problems, we developed a self-healing, pH-sensitive and shape memory hydrogel of poly (diacetone acrylamide- co -acrylamide -co -acrylic acid)/alginate (PDAAc-A), taking advantage of the Schiff-base reaction and the hydrogen bonding interaction in a one-step method. The tensile modulus, fracture stress, fracture strain and toughness of the developed PDAAc-A3 hydrogel are 0.021 MPa, 0.013 MPa, 7.5 mm/mm and 0.07 MJ/m 2 , respectively. The dynamic and reversible acylhydrazone and hydrogen bonds endow hydrogels with self-healing property and pH-sensitive gel-sol transformation ability. The tensile tests demonstrate that the self-healing efficiency of hydrogel could reach up to 85% after about 30 min. Furthermore, PDAAc-A hydrogel exhibits pH-sensitivity during drug release. In PBS solution with pH value of 5, the hydrogel shows the fastest drug release rate and the highest drug release ratio, which is near 100% after about 4 h. Moreover, in 1 M ferric chloride solution, the shape memory time, shape memory ratio and shape recovery ratio of the resultant hydrogel are 2 min, 100% and 100%, respectively.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Yanheng He,Tianwei Zhang,Ming Zeng,Hao Duan,Bing Zhang,Jianying Yu
To prepare SBS modified asphalt (SMA) waterproofing membrane with excellent self-healing performance, in this paper, four self-healing agents (ASHA-A, ASHA-B, ASHA-C, ASHA-D) with acylhydrazone bonds and carbon-carbon double bonds (C C) were synthesized, and were used to prepare self-healing SMA waterproofing membranes (SSMA-A, SSMA-B, SSMA-C, SSMA-D). The effects of ASHAs with different structures on the structure, high and low temperature properties, joint peel strength and self-healing performance of SSMAs were investigated. The Fourier transform infrared spectroscopy and fluorescence microscope results showed that acylhydrazone bonds of ASHAs were introduced into the chains of SBS molecules, and the SBS in SSMAs occurred crosslinking through the C C of ASHAs and SBS, the crosslinked network structures of SBS in SSMA-C and SSMA-D were denser and more complete because ASHA-C and ASHA-D contained more C C involved in the crosslinking reaction. The softening point and low temperature flexibility of SSMAs were enhanced by the formation of the SBS crosslinked network structure, and the optimum dosage of ASHAs was 0.6%. The joint peel strength of SSMA-A, SSMA-B, SSMA-C and SSMA-D increased by 26.68%, 31.25%, 49.52% and 56.97% compared to SMA. The introduction of acylhydrazone bonds with reversible fracture and rearrangement significantly improved the crack self-healing performance of SMA, the impermeability times of SMA, SSMA-A, SSMA-B, SSMA-C and SSMA-D were 13.28 min, 37.29 min, 42.53 min, 53.34 min and 59.67 min after self-healing at 40℃ for 8 h, which indicated that ASHA-D with benzene ring and multiple C C had the best improvement in self-healing performance of SMA.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 26
·12111-12127
·
IF 3.5
Zhao Yanna,Bai Xiaowei,Zhang Yingying,Wang Yuqi,Huang Yuqing,Hou Wentong
Acylhydrazone bonds can participate in dynamic exchange reactions under acid-stimulated conditions, and disulfide bonds can participate in dynamic exchange reactions under thermally stimulated conditions. It is of great significance to prepare epoxy vitrimer that can rapidly self-repair under acid and thermal stimulation conditions. In this paper, vanillin was used as raw material, and monomer (VAN-AD) containing acylhydrazone bond was synthesized by reaction with adipic dihydrazide. Then, VAN-AD and 4-aminophenyl disulfide (SS) were cured together with glycerol triglycidyl ether to prepare an epoxy vitrimer with acylhydrazone and disulfide dual dynamic covalent bonds. Where VAN-AD provides some of the flexible chain segments and acylhydrazone bonds and SS provides the aromatic phenyl and disulfide bonds. The material was prepared in a simple process and under mild condition, and the properties of the material were optimized by changing the ratio of VAN-AD to SS. The T g of the material was 50 °C when the ratio of SS was the highest, the thermal stability was enhanced with the increase of the ratio of SS, and the maximum tensile strength up to 50.9 MPa, and the material can be completely degraded by DMF with 5% HCl. It is worth noting that the material shows rapid self-healing properties under acid-heat conditions, self-healing rates up to 97.37%, and the tensile strength can reach 26 MPa after repair. The material can be successfully remodeled by hot pressing for 1 h at 140 °C and 10 MPa. Graphical abstract
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 11
·8814-8828
·
IF 3.442
Qiao Liyuan,Liu Chengde,Liu Cheng,Yang Liquan,Zhang Manxia,Liu Wentao,Wang Jinyan,Jian Xigao
Dialdehyde-terminated PEG (PEG–CHO) and adipic dihydrazide-modified alginate (ALG-ADH) was developed to provide aldehyde and hydrazide active sites, respectively, and thus to obtain dynamic acylhydrazone bonds, which endow alginate hydrogel with excellent self-healing property. Different concentrations of cross-linking agent have been added, and their influence on the structure, morphology, mechanical properties and self-healing performance has been evaluated. The gelation kinetics, shear performance and compressive property have been investigated in detail. The hydrogel with 5% cross-linking agent exhibited the highest mechanical performance, with the shear modulus of 0.234 MPa and compressive modulus of 0.288 MPa. Due to dynamic acylhydrazone and multiple hydrogen bonds, the hydrogels have demonstrated excellent self-healing properties. After self-healing process, the hydrogel has retained 84.4% of the original tensile modulus. The as-prepared alginate hydrogel was molded into different shapes to exhibit the excellent plasticity. Moreover, when tetracycline hydrochloride was loaded into the hydrogel system as a model drug, the modified alginate hydrogel demonstrated the fastest drug release rate at pH = 7.4. It is suggested that the self-healing alginate hydrogel has a great potential in drug delivery, such as targeted drug release in intestinal treatment.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 8
·2528-2541
·
IF 3.348
Lijun Chen,Sui Wang,Zhiyong Guo,Yufang Hu
Hydrogels with excellent self-healing properties have specific applications in smart polymer materials, but they often do not have excellent mechanical properties, or the preparation process of hydrogels is too complicated. Here, we prepared a multi-functional intelligent hydrogel using a simple water bath one-pot method through the synergistic effect of dual dynamic cross-linked agents, including acylhydrazone bonds (the first cross-linked agent) and borate ester bonds (the second cross-linked agent), at the same time hydrogen bonds provided physical interaction. The hydrogel exhibited excellent self-healing ability (up to 91%) and extraordinary mechanical strength (tensile stress 173.1405 kPa and hysteresis energy of 1.8659 MJ m −3 ). The research used chemical cross-linked (acylhydrazone bonds and borate ester bonds) and physical cross-linked (hydrogen bonds). The prepared hydrogel had the dual advantages of excellent self-healing performance and high mechanical strength. The hydrogel can be used in smart materials, such as working pressure tissues and sensing materials that require a certain degree of mechanical strength and self-healing properties, and also provides a design strategy for preparing hydrogels with high mechanical strength and excellent self-healing properties.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Linzhe Xu,Yingbo Chen,Wenxuan Su,Junbo Cui,Siyu Wei
Two-dimensional metal carbides (MXene) and amidoxime-based materials have attracted more and more attention in heavy metal adsorption. Herein, we prepared a mixed matrix membrane of amidoximized polyacrylonitrile with MXene particles by a simple phase separation method (M/PAO mixed matrix membrane). The M/PAO mixed matrix membrane had excellent U(VI) ion selectivity compared to vanadium. Under the synergistic adsorption of the two functional adsorption units, the maximum adsorption capacity can reach 10.31 g/m 2 (364.46 mg/g) at pH = 6, while the adsorption capacity of U(VI) can reach 37.49 mg/m 2 (1.3225 mg/g) in a seven-day natural seawater experiment, which was far more than that of single amidoxime-based adsorbent. Pseudo-second-order kinetics and Langmuir adsorption model were used to study the adsorption behavior. The results of various characterization methods showed the complexation mechanism between the M/PAO mixed matrix membrane and U(VI) ions. Considering its excellent adsorption capacity and facile preparation process, we believe that the M/PAO mixed matrix membrane is one of the most promising candidates for large-scale U(VI) extraction from seawater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Polymeric Materials and Polymeric Biomaterials
·
2023
·
IF 3.2
Jie Mao,Yalei Liu,Lijun Chen,Sui Wang
In this paper, PVA/BDA/ADH gels with good mechanical properties and self-healing properties were prepared using polyvinyl alcohol (PVA), 4,4-biphenyldicarboxaldehyde (BDA), and adipic dihydrazide (ADH) as raw materials. The hydrogel network achieves chemical-physical double cross-linking through acylhydrazone bonds and hydrogen bonds. The as-prepared PVA/BDA/ADH gels have good mechanical properties (the tensile stress of PVA/BDA/ADH gels is about 2 times that of pure PVA hydrogel) due to chemical and physical double cross-linking. It also has good self-healing properties under external conditions. Compared with pure PVA hydrogel, PVA/BDA/ADH gels have more stable self-healing properties.
研究领域:
材料科学
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Xiaoshu Wei,Xin Dong,Meiying Huang,Zhipeng Zhou,Zihao Liang,Yuyao Li,Yonghang Yang,Jiaxing Lu,Zhilv Wang,Changye Zhan,Wei Liu,Zhikun Zheng
The central feature of covalent organic frameworks (COFs) is crystallinity which is conducive to forming a uniform pore structure . However, synthesis of highly crystalline COFs based on stable covalent bonds remains formidable task. In this paper, a highly crystalline acylhydrazone COF-BD was synthesized in aqueous phase. The synthesis mechanism was proposed that the protonated hydrazide monomers dissolved in aqueous phase reacted with aldehyde monomers by deprotonation into the micellar. By investigating the effects of experimental parameters on the crystallinity of COF-BD, it was founded that under C9–COONa as surfactant , 80 °C, and 1.0 eq acetic acid as catalyst, acylhydrazone COF-BD with good crystallinity could be prepared. To prove the extensibility of this method, another acylhydrazone COF was prepared successfully.
研究领域:
材料科学
·
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）