JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Dongmei Li,Zhiwei Zhu,Da-Wen Sun
Raman spectroscopy has been employed for studying water structures in biomolecular aqueous solutions for decades but challenges remain to quantify the hydrogen bonding strengths in complex aqueous solution systems. In this study, four kinds of saccharide aqueous solutions were employed to investigate the quantitative relationship between the hydrogen bonding strength of water using confocal Raman microscopy and the Raman spectra of these solutions in the range of 3000–3800 cm −1 . Results showed that the enhancement effect of saccharide molecules on the hydrogen bonding strength of water increased with the concentration, and the degree of changes in the strength was related to the hydration capability and partial molal volume of saccharide molecules. An equation based on the average number of hydrogen bonds of water molecule was proposed to quantify the bonding strength in saccharide aqueous solutions with satisfactory accuracy as verified by T 2 relaxation time using nuclear magnetic resonance spectrometer.
研究领域:
生物化学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Zhiwei Zhu,Jiayu Mai,Tian Li,Da-Wen Sun,Qingqing Zeng,Xiaohui Liu,Zhe Wang
Supercooling is a main controllable factor for the fundamental understanding the high-pressure shift freezing (HPSF). In the study, a self-developed device based on the diamond anvil cell (DAC) and confocal Raman microscopy was utilized to realize an in-situ investigation of supercooling behaviour during HPSF of the pure water and sucrose solution. The spectra were used to determine the freezing point which is shown as a spectral phase marker (S D ). The hydrogen bond strengths of water and sucrose solution under supercooling states were estimated by peak position and peak area ratio of sub-peaks. The results showed that the O H stretching bands had redshift under supercooling states. Moreover, the addition of sucrose molecules could strengthen the hydrogen bonding strength of water molecules under supercooling states. Thus, the DAC combined with Raman spectroscopy could be considered a novel strategy for a deep understanding of the supercooling behaviour during HPSF. URLs: http://www.ucd.ie/refrig , http://www.ucd.ie/sun .
研究领域:
生物物理学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
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IF 8.4
Yiwen Cao,Xinyi Chen,Yingzhan Li,Yaping Wang,Houyong Yu,Ziheng Li,Ying Zhou
Because of the fascinating properties and tremendous application potential of nanocellulose aerogels (CAs), research into them has exploded. However, regulating and controlling their microstructure remain challenging. Herein, the strategy of regulating the strength of hydrogen bonding was used to investigate the cause of cellulose nanofiber (CNF) aggregation. Three kinds of silane coupling agents with different tail functional groups were employed to modify CNFs. The hydrogen bond fraction of CAs decreased from 0.41 to 0.33, indicating a decrease in the intensity of hydrogen bonding. Also, the CA with a 3D-web-like structure was obtained. The specific surface area of the aerogels increased from 44.36 to 99.37 m2/g, showing that the aggregation was limited. In parallel, superior mechanical properties and thermal insulation were obtained. These results showed that varying the intensity of the hydrogen bond could inhibit the aggregation of the CA skeleton structure. The improvement of the specific surface area will expand its application in catalyst support, environmental remediation, heat insulation, and other fields. This method paved the way for future studies on the control of the micro-structure of CAs.
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
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Wenjing Ma,Mingjun Tang,Siying Li,Yongqun Ma,Min Ling,Wenqian Sheng
This study explored the extraction of polyphenols from Juniperus chinensis Roxb. using natural deep eutectic solvents (NADES), emphasizing the role of hydrogen bonding strength in enhancing extraction efficiency. Choline chloride-fructose emerged as the most effective NADES after evaluating the correlation between hydroxyl stretching vibrations and polyphenol yield. Using the response surface methodology, the optimal extraction process (liquid to solid ratio 50.6 mL/g, extraction temperature 41.1 °C, extraction time 29.8 min, ultrasonic time 14.9 min) was determined to have a yield of 27.90 ± 0.14 mg/g, more than double that of water extraction. Choline chloride-fructose showed a more pronounced disruptive effect on plant powders. Additionally, compared to water extracts, the extracts using choline chloride-fructose exhibited higher antioxidant potential and quercitrin content. Overall, this study explores the correlation between hydrogen bond strength and extraction yield, while optimizing a green and efficient alternative process for polyphenol extraction from plants. These findings align with green chemistry principles, contributing to the development of sustainable and environmentally friendly extraction methods.
研究领域:
植物化学
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食品科学
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
NATURE MATERIALS
·
2025
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IF 38.5
Li Ziyue,Lin Yuxiao,Garaga Mounesha N.,Greenbaum Steven G.,Liao Mochou,Ruan Jiafeng,Li Qin,Li Yunsong,Sun Dalin,Xu Kang,Fang Fang,Wang Fei
Proton conduction in hydrogen-bond-rich protic electrolytes enables fast mass and charge transport, crucial for electrochemical energy storage and power conversion. Such transport can give proton-based batteries exceptional rate capability and low-temperature operation beyond other working ions. Here we show that in phosphoric acid (H 3 PO 4 ) electrolytes, vehicular and structural proton transport coexist, and their contributions to conductivity can be quantitatively distinguished. We link structural diffusion directly to hydrogen-bond strength, enabling the precise tuning of proton migration. Guided by this, we reveal a double conductivity peak from regulated structural diffusion. The optimal electrolyte (5.8-M H 3 PO 4 ) achieves high overall (232.9 mS cm −1 ) and structural (164.9 mS cm −1 ) conductivity. A MoO 3 ‖ CuFe-TBA battery with this electrolyte outperforms a deep-eutectic benchmark (8.3-M H 3 PO 4 ), delivering >17,474 W kg −1 at room temperature and retaining 15.1 Wh kg −1 at −75 °C. These findings provide a framework for designing advanced protic electrolytes across electrochemical systems.
研究领域:
电化学
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能源材料
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物理化学
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储能技术
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质子传导材料
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 44
·16773-16780
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IF 8.067
Jiawei Lin,Muwei Zhang,Niu Sun,Shihui He,Xusheng Zhang,Zhongnan Guo,Jing Zhao,Quanlin Liu,Wenxia Yuan
Zero-dimensional (0D) tetrahedral Mn(II) hybrids as narrow-band green emitters show great potential for the backlighting of liquid crystal displays. However, the factors influencing the full-width at half-maximum (fwhm) of green emission in the 0D Mn hybrid systems still need to be understood in depth. In this work, the regulation of the fwhm of green-emitting tetrahedral Mn(II) hybrids has been investigated from the structural distortion and hydrogen bond strength points of view. Two 0D Mn-based OIMHs with cyclic organic cations, (MDPA)2MnBr4 (1, MDPA = N-methyldiphenylaminium) and (MTPP)2MnBr4 (2, MTPP = methyltriphenylphosphonium), have been synthesized. Both of them contain isolated [MnBr4]2− tetrahedra and show green emission at 540 and 518 nm upon 450 nm excitation. It is found that the fwhm of compound 2 (48 nm) is much narrower than that of 1 (62 nm), and we demonstrate that it is associated with the smaller distortion of the Mn(II) tetrahedron in 2. Furthermore, Hirshfeld surface calculations suggest that this smaller distortion could be contributed by the weak hydrogen bonds between the organic cations and the [MnBr4]2− units in 2 compared to that in 1. We found that the other tetrahedral Mn(II) bromides reported in previous literature also show this behavior. Meanwhile, the triboluminescence emission is observed in both 1 and 2, ascribed to the polarized charges on the crystal surface. A white light-emitting diode device was fabricated using compound 2 with a high PLQY (55.66% upon 450 nm). Our work not only provides an insight to understand in depth the role of structural distortion and hydrogen bond strength in regulating the fwhm of the Mn(II) tetrahedron, but also provides feasible rules to explore the new narrow-band green-emitting OIMHs.
研究领域:
材料科学
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光电
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固体化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zi-Rong Li,Tian-Run Lv,Zhenxu Yang,Wen-Hai Zhang,Ming-Jie Yin,Ken-Tye Yong,Quan-Fu An
Stretchable strain sensors have the potential to significantly advance electronic healthcare (E-healthcare). However, current challenges, including a limited detection range, low sensitivity, aggregation of conductive nanoparticles, and the inherent rigidity of conductive polymers within hydrogel matrices, hinder their progress. In our study, we employed a dual approach: we tailored both physical and chemical bond densities and coupled them with conductive polymer nanoparticles. As a result, we developed a stretchable hydrogel strain sensor embedded with a quick response code. This innovation achieved an impressive detection range of up to 1500% and a high gauge factor of 16.6. By modifying the hydrogen bond strength and converting conductive polymer nanoparticles into linear polymer chains, we managed to enhance the sensor's stretchability to 2100%. Moreover, the incorporation of a quick response code enabled the sensor to simultaneously monitor in real-time and encode information. Thus, our sensor emerges as a robust contender for pioneering advancements in E-healthcare, potentially supporting intricate applications like rehabilitation progression tracking.
研究领域:
材料科学
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生物医学工程
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传感器
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医疗技术
✓ 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）