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Polymeric ultralong organic phosphorescence with excellent humidity and temperature resistance via hydrophobic effect

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Aggregate 2024年第2期5卷 222-228页

作者： Zhongyu Li Kexin Fu Huangjun Deng Kaixuan Nie Zhe Pan Zhu Mao Juan Zhao Gang Li Pengli Zhu Zhenguo Chi Rong Sun National Key Laboratory of Materials for Integrated Circuits Shenzhen Institute of Advanced Electronic MaterialsShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina PCFM Lab GDHPPC LabGuangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional FilmsState Key Laboratory of OEMTSchool of ChemistrySun Yat-sen UniversityGuangzhouChina State Key Laboratory of Optoelectronic Material and Technologies School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhouChina

Polymeric ultralong organic phosphorescence(UOP)with persistent emission is of great importance in practical ***,achieving good water-resistance for long-term environmental stability is a formidable *** this contribution,through tailoring the alkyl-chain length of the hardeners and emitters,polymeric UOPs with varying crosslinking density and hydrophobic effect were ***,all the polymers show no obvious decrease in UOP emission after high temperature-humidity test(85℃/85%relative humidity for 7 days).Detailed investigations demonstrate that the rigid covalent crosslinking networks suppress the quenching of triplet excitons while the hydrophobic microenvironment affords good water/moisture-resistance ***,the polymers with superior processability are successfully applied as optical coatings,prepreg,and afterglow *** this work,we provide a new strategy to promote the long-term stability of polymeric UOP materials in high-temperature-humidity conditions.

关键词： aqueous environment hydrophobic effect long-term stability polymeric phosphorescence room temperature phosphorescence

Modeling the Influence of Salt on the hydrophobic effect and Protein Fold Stability

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Communications in Computational Physics 2013年第1期13卷 90-106页

作者： Mihir S.Date Brian N.Dominy Department of Chemistry Clemson UniversityClemson SC 29631USA.

Salt influences protein stability through electrostatic mechanisms as well as through nonpolar Hofmeister *** the present work,a continuum solvation based model is developed to explore the impact of salt on protein *** model relies on a traditional Poisson-Boltzmann(PB)term to describe the polar or electrostatic effects of salt,and a surface area dependent term containing a salt concentration dependent microscopic surface tension function to capture the non-polar Hofmeister *** model is first validated against a series of cold-shock protein variants whose salt-dependent protein fold stability profiles have been previously determined *** approach is then applied to HIV-1 protease in order to explain an experimentally observed enhancement in stability and activity at high(1M)NaCl *** inclusion of the salt-dependent non-polar term brings the model into quantitative agreement with experiment,and provides the basis for further studies into the impact of ionic strength on protein structure,function,and evolution.

关键词： Electrostatic stability hydrophobic effect halophile cold shock protein HIV-1 protease

Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

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Science China Chemistry 2025年第1期68卷 369-376页

作者： Song-Meng Wang Hao Nian Yan-Fang Wang Li-Shuo Zheng Yu-Tao Zheng Yi-Wei Dong Liping Huang Xiaoping Wang Wei Jiang Liu-Pan Yang Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China School of Pharmaceutical Science Hengyang Medical SchoolUniversity of South ChinaHengyang 421001China School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesGuangxi Normal UniversityGuilin 541004China

Studying molecular recognition in aqueous environments is crucial for understanding biological ***,we present a series of N-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine *** subtle modifications can significantly affect the binding properties of these receptors,which is similar to the mutations in biological *** theoretical calculations and molecular recognition experiments demonstrated that these“mutations”have an impact on the hydrophobicity and charge distribution of the hosts,consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

关键词： host-guest interaction hydrophobic effect endo-functionalized cavity mutation pyridine

effect of Temperature on Self-Interaction of Human-Like Collagen

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Chinese Journal of Chemistry 2011年第9期29卷 1811-1816页

作者： Fan, Daidi Xing, Jianyu Xue, Wenjiao Zhu, Chenhui Ma, Xiaoxuan Ma, Rong Shaanxi Key Laboratory of Degradable Biomedical Materials School of Chemical Engineering Northwest University Xi＇ an Shannxi 710069 China School of Environmental Science and Engineering Chang＇an University Xi＇an Shannxi 710054 China Shaanxi R＆D Center of Biomaterials and Fermentation Engineering School of Chemical Engineering Northwest University Xi＇ an Shannxi 710069 China Shaanxi Province Institute of Microbiology Xi＇an Shannxi 710043 China

effects of temperature on self-interaction of human-like collagen （HLC） were investigated by hydrophobic in- teraction chromatography, calorimetric measurement, and sodium dodecyl sulphate-polyacrylamide gel electropho- resis （SDS-PAGE） analysis. Results show that three types of interaction roles may exist between ttLC molecules at 3--50 ℃, which were divided into three narrower temperature ranges. In temperature range from 3--22 ℃, hy- drogen bonding plays a key role in the formation of a gelatinous aggregate. In the range of 22--38 ℃, hydrophobic bonds accompanied by hydrogen bonds are involved in the formation compact aggregates. When temperature is above 38 ℃ the hydrophobic effect formed in the HLC monomer results in the loss of its ability to self-interact.

关键词： calorimetry human-like collagen hydrophobic effect self-interaction temperature range

Adsorption of trichlorphon on phyllosilicate minerals:effect of low-molecular-weight organic acids

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Pedosphere 2024年第1期34卷 78-87页

作者： Hongfeng CHEN Zhouyang HE Mingxia HOU Cilai TANG Yonghong WU College of Hydraulic&Environmental Engineering China Three Gorges UniversityYichang 443002China Hubei Field Observation and Scientific Research Stations for Water Ecosystem in Three Gorges Reservoir China Three Gorges UniversityYichang 443002China Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region China Three Gorges UniversityYichang 443002China State Key Laboratory of Soi and Sustainable Agriculture Institute of Soil SciencesChinese Academy of SciencesNanjing 210008China

The use of trichlorphon in large quantities causes a large number of organic pollutants to enter water, sediments, and soils. Phyllosilicate minerals are considered effective adsorbents for organic pollutants. However, the adsorption behavior of organic pollutants on soil minerals affected by low-molecular-weight organic acids(LMWOAs) is not fully understood. In this study, the effect of LMWOAs on the adsorption behavior of trichlorphon on phyllosilicate minerals was investigated using a combination of adsorption measurements and molecular spectroscopic techniques(attenuated total reflection-Fourier transform infrared spectroscopy(ATR-FTIR) and X-ray photoelectron spectroscopy(XPS)). The adsorption of trichlorphon onto kaolinite(KAO) and montmorillonite(MON) was suppressed by increasing pH, indicating that electrostatic interaction played a key role in adsorption, especially at low pH. In the presence of citric acid(CA), there was an obvious promotion of trichlorphon adsorption on KAO and MON. In the presence of oxalic acid(OA), the adsorption of trichlorphon on KAO was promoted, whereas the adsorption on MON was inhibited, especially at pH 4.0. The presence of CA and OA increased the adsorption by increasing the exposure of hydrophobic sites of KAO and MON. The results from ATR-FTIR and XPS also indicated that the hydrophobic Si–O sites of phyllosilicate minerals were the preferred adsorption sites for trichlorphon in the presence of CA and OA, probably driven by the hydrophobic effect. However, the weak effect of OA on MON caused an increase in the electrostatic repulsion between MON and trichlorphon molecules, thus inhibiting adsorption. This study is significant for a deeper understanding of self-purification of soil and sediment systems in the presence of organic pollutants.

关键词： adsorption behavior citric acid hydrophobic effect organic pesticide organic pollutant organochlorine oxalic acid

Enhancing hydrophobicity via core-shell metal organic frameworks for high-humidity flue gas CO_(2) capture

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Chinese Journal of Chemical Engineering 2023年第9期61卷 82-89页

作者： Yinji Wan Dekai Kong Feng Xiong Tianjie Qiu Song Gao Qiuning Zhang Yefan Miao Mulin Qin Shengqiang Wu Yonggang Wang Ruiqin Zhong Ruqiang Zou State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials School of Materials Science and EngineeringPeking UniversityBeijing 100871China

Developing metal-organic framework(MOF)materials with the moisture-resistant feature is highly desirable for CO_(2)capture from highly humid flue *** this work,a new core-shell MOF@MOF composite using Mg-MOF-74 with high CO_(2)capture capacity as a functional core and hydrophobic zeolitic imidazolate framework-8(ZIF-8)as a protective shell is fabricated by the epitaxial growth *** results show that the CO_(2)adsorption performance of the core-shell structured Mg-MOF-74@ZIF-8 composites from water-containing flue gas is enhanced along with their improved *** dynamic breakthrough results show that the Mg-MOF-74@ZIF-8 with three assembled layers(Mg-MOF-74@ZIF-8-3)can capture 3.56 mmol-g^(-1)CO_(2)from wet CO_(2)/N_(2)(VCO_(2):V_(N_(2))=15:85)mixtures,which outperforms Mg-MOF-74(0.37 mmol·g^(-1))and most of the reported physisorbents.

关键词： Core-shell Mg-MOF-74@ZIF-8 CO_(2)capture hydrophobic effect

Recent Advances in Self-assembled Nano-therapeutics

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Chinese Journal of Polymer Science 2018年第3期36卷 322-346页

作者： Chun-Xiong Zheng Yu Zhao Yang Liu Key Laboratory of Functional Polymer Materials of Ministry of Education Institute of Polymer ChemistryCollege of Chemistryand State Key Laboratory of Medicinal Chemical BiologyNankai UniversityTianjin 300071China

The applications of nanotechnology in biomedicine have gained considerable attentions in recent years owing to the great enhancement of therapeutic *** of self-assembly into nanotechnology has brought tremendous convenience during the formation of *** on distinctive methods of self-assembly,nano-therapeutics have beer~developed to ar~impressive stage with the ability to perform site-specific delivery with temporal and spatial *** review focuses on the recent advances in the preparing methods for nano-therapeutics,and their applications in the treatments of diseases.

关键词： Self-assembly Nano-therapeutics hydrophobic effect Electrostatic interaction Supramolecular host-guest interaction

Poly(dimethyl siloxane)anti-corrosion coating with wide pH-responsive and self-healing performance based on core-shell nanofiber containers

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Journal of Materials Science & Technology 2022年第6期101卷 128-145页

作者： Xiaohong Ji Wei Wang Xia Zhao Lifei Wang Fubin Ma Yanli Wang Jizhou Duan Baorong Hou Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China School of Materials Science and Engineering Ocean University of China238 Songling RoadQingdao 266100China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China Center for Ocean Mega-Science Chinese Academy of ScienceQingdao 266071China School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China

In this research,core-shell electrospun fibers loaded with the shell of cellulose acetate and the core of oleic acid and alkyd varnish resin were synthesized and used within poly(dimethyl siloxane)(PDMS)to prepare self-healing and p H-responsive coatings for a steel *** morphology of the electrospun fibers was characterized by scanning electron microscopy,transmission electron microscopy and confocal fluorescence *** gravimetric analysis and Fourier transform infrared spectroscopy revealed that the self-healing agents were loaded successfully with a loading rate of 2.9%.The properties of the fiber-PDMS composite coating were characterized by water contact angle measurements,mechanical tests,electrochemical impedance spectroscopy,and scanning Kelvin *** show that the maximum self-healing efficiencies of the fiber-PDMS coating in alkaline and acidic solution are 95.96%and 97.04%,*** composition of the self-healing agents at the damaged part of the coating was verified by an infrared mapping test and using an energy dispersive *** addition,the sandpaper abrasion test shows the hydrophobic effect of fiber-PDMS coating remains above 88.2%and decreases slightly through the addition of abrasion *** research can pave the way for the industrial applications of p H-responsive self-healing coatings.

关键词： Core-shell fibers Self-healing coating Oleic acid hydrophobic effect

A Superhydrophobic Hydrogel for Self-Healing and Robust Strain Sensor with Liquid Impalement Resistance

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Chinese Journal of Chemistry 2021年第12期39卷 3393-3398页

作者： Peng Wang Tao Chen Xuesong Zhang Wei Duan Chongyuan Zhang Huilong Han Qing Xie School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaodingHebei 071003China Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention North China Electric Power UniversityBaodingHebei 071003China School of Electrical and Electronic Engineering North China Electric Power UniversityBaodingHebei 071003China

The superhydrophobic strain sensor is a fantastic direction,which could protect the strain sensor in harsh ***,the self-healing superhydrophobic strain sensor has not been *** this research,we developed a superhydrophobic strain sensor,which demonstrated excellent self-healing,mechanical robustness,and liquid impalement resistance *** key innovation is to partially embed hydrophobic graphene and carbon nanotubes into the hydrogel *** hodrogel substrate endows the sample with self-healing *** graphene,carbon nanotubes and hydrogel together lead to an accurate and real-time monitoring of human ***,the prepared sample demonstrated super-robust superhydrophobicity,which retained superhydrophobicity after many kinds of damage(such as 1000%stretch,10000 stretching-releasing cycles,hand-rub,tape-peeling,and high-speed drop/jet impact).

关键词： hydrophobic effect Gels Graphene Strain sensor Self-healing