JOURNAL OF MOLECULAR LIQUIDS
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2012
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IF 1.58
Yi-Tian Tang,Xiao-Qiu Dou,Zhi-Ang Ji,Ping Li,Shen-Min Zhu,Jia-Jun Gu,Chuan-Liang Feng,Di Zhang
Dye/water separation is a worldwide challenge because of the increasing industrial dye wastewater. In this paper, a novel pH-responsive C 2 -symmetric cyclohexane based hydrogel was developed and was capable of rapidly adsorbing dye molecules in minutes. This hydrogel dye adsorbent was characterized by Fourier transform infrared (FT-IR) spectroscopy, Ultraviolet–visible (UV–vis) spectroscopy, Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The adsorption equilibrium of the dyes is in good agreement with Langmuir adsorption isotherm model. Moreover, the hydrogel adsorbent can be recovered easily just by changing the pH of the medium, which is promising to be used an efficient dye adsorbent in water purification .
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
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Minggang Hu,Xiaochen Wang,Can Wang,Hongtao Chu,Xinfeng Song,Guohua Dong,Jiyuan Zhang,Jin Xing
In this study, a new and simple method for synthesizing boron complexes was presented. The boron complexes with C 2 -symmetric ligands were prepared from in situ generated tertiary amine by the reaction of salicylaldehyde with primary amine in the presence of sodium borohydride. The boron complexes were characterized by 1 H and 13 C NMR spectroscopy, elemental analysis, and mass spectrometry. The crystal structures of complexes 1 and 2 were determined by single crystal X-ray diffraction method. The complex is a mononuclear boron complex with a tertiary amine ligand. The boron center is tetracoordinated with a distorted tetrahedral geometry. Catalytic activities of the boron complexes in the reduction of dyes, was investigated using sodium borohydride as a reducing agent. Complexes 1 and 2 were effective catalysts for degradation of dyes. Kinetic studies reveal that the reduction of methylene blue is of the first order. Free radical scavenging activities of the boron complexes have been tested using DPPH, ABTS and hydroxyl radicals, respectively. The result shows that the boron complexes have effective antioxidant activity.
研究领域:
化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2023
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IF 3.7
Yuanjiao Liu,Yi Wang,Songyao Zhang,Hengqi Zou,Xinrui Miao,Wenli Deng
The self-assembly of two kinds of C2-symmetric aromatic carboxylic acids named 4,4′,4″,4‴-(1,4-phenylenebis(azanetriyl))tetrabenzoic acid (H4PTA) and 5′,5″-bis(4-carboxyphenyl)-[1,1′:3′,1″:3″,1‴-quaterphenyl]-4,4‴-dicarboxylic acid (H4QDA) and the coadsorption with coronene (COR) molecules at different solution concentrations were investigated at the heptanoic acid (HA)/highly oriented pyrolytic graphite (HOPG) interface by scanning tunneling microscopy (STM). H4PTA molecules with nonplanar conformation self-assembled into a highly ordered rhombus structure at variational concentrations and subsequently could be regulated into a Kagomé network by the coadsorption of COR molecules. H4QDA molecules with planar conformation self-assembled into two various nanostructures (rhombus structure and Kagomé network) coexisting on the HOPG surface at different concentrations. The Kagomé architecture of H4QDA could act as a rigid host template to trap the COR molecules. Meanwhile, COR exhibited preferential adsorption in the porous template: COR only entered the hexagonal cavities at low concentrations and filled in all hexagonal and triangular cavities at high concentrations. Density functional theory (DFT) calculations and molecular dynamics (MD) simulations showed that the host–guest co-assembled structures were more thermodynamically and kinetically stable. The formation of different self-assembly and co-assembly processes of two molecules could be attributed to the dissimilar molecular conformation. Our work is of significance to further explore the formation mechanism of two-dimensional (2D) porous arrangements and provides an ideal way to regulate the adsorption of porous templates.
研究领域:
材料科学
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表面科学
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计算化学
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产品关联
DOI
高影响因子
Soft Matter
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2012
·Vol. 8
·期 11
·3231-3238
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IF 4.39
Xiaoqiu Dou,Ping Li,Di Zhang,Chuan-Liang Feng
With the development of industry, organic dyes used in printing, textile, plastic, foods, and cosmetics have brought health and environmental issues. A C2-symmetric benzene-based hydrogel with unique layered structure mimicking activated carbon was developed and found capable of the controllable adsorption of 97–99% of certain organic dyes (methylene blue and methyl violet 2B) within two minutes. The adsorption equilibrium of the dyes is in good agreement with the Langmuir adsorption isotherm model. The controllable adsorption of the dyes was confirmed by varying the pH of the medium. The hydrogel's rapid, highly effective, reusable, and controllable adsorption of organic dyes makes it possible to not only adsorb toxic dyes from wastewater, but also be used as potential delivery vehicles for small drug molecules in the field of drug delivery.
研究领域:
环境科学
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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
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Jiahe Huang,Chunhong Zhang,Jianwei Bai,Yudan Wang,Toshifumi Satoh,Feng-Huei Lin
Supramolecular hydrogels have broad application prospects in asymmetric catalysis due to their unique properties, and the water environment inside the hydrogels plays an important role in green catalysis. This paper reports a novel C2-symmetric proline derivative gelator (p-L-Phe-Pro-COOH) with a hydrophobic benzene ring in the center and hydrophilic groups on both sides. The C2-symmetric structure can provide the gelator with more catalytically active sites. p-L-Phe-Pro-COOH can self-assemble in H2O or H2O/dimethyl sulfoxide (DMSO) mixed solvents to form gels with a three-dimensional network of left-handed intertwined helical nanofibers, namely, L-Hyd and L-Hyd-DMSO. The L-Hyd and L-Hyd-DMSO gels are used as catalysts for the aldol and Mannich reactions, achieving high yields (>90%), diastereoselectivity (dr >90/10 (anti/syn)), and enantioselectivity (ee value of 99%) of the products without requiring additional additives. Results indicated that the L-Hyd and L-Hyd-DMSO gels exhibited higher catalytic activity compared to that of the gelator. Further, the Mannich reaction catalyzed by L-Hyd-DMSO revealed that introducing DMSO considerably enhanced the reaction yield while maintaining a high enantioselectivity. The L-Hyd-DMSO effectively addresses the issue of low yield in Mannich reactions conducted in aqueous systems. In addition, the L-Hyd and L-Hyd-DMSO gels acting as catalysts can be recovered by simple extraction and maintain good reactivity after five cycles. The findings of this study indicate that supramolecular hydrogels show potential in asymmetric catalytic reactions, which closely align with the principles of green chemistry.
研究领域:
有机化学
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绿色化学
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材料科学
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产品关联
DOI
高影响因子
TETRAHEDRON-ASYMMETRY
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2014
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IF 2.165
An-lin Zhang,Li-wen Yang,Nian-fa Yang,Yan-ling Liu
A series of C 2 -symmetric chiral amino diol tridentate ligands 3a – g were prepared from achiral bulky organolithiums, achiral bulky primary amines , and optically active epichlorohydrin (ECH). The prepared C 2 -symmetric chiral amino diol tridentate ligands were capable of inducing enantioselectivity in the model reaction of aromatic and aliphatic aldehydes with diethylzinc with an ee of up to 96%. The enantioselectivity can be modulated by adjusting the steric hindrance of the achiral reagents employed in the synthesis of the chiral ligand. The configuration of the addition product depended on the configuration of the amino diol ligands, which can be simply controlled as desired by using the ECH with the desired configuration during the preparation of the ligand.
研究领域:
有机化学
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催化
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立体化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）