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Supramolecular polymers fabricated by orthogonal self-assembly based on multiple hydrogen bonding and macrocyclic host–guest interactions

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Chinese Chemical Letters 2020年第1期31卷 1-9页

作者： Tangxin xiao Ling Zhou xiao-qiang sun Feihe Huang Chen Lin Leyong Wang School of Petrochemical Engineering Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou UniversityChangzhou 213164China State Key Laboratory of Chemical Engineering Center for Chemistry of High Performance&Novel MaterialsDepartment of ChemistryZhejiang UniversityHangzhou 310027China Key Laboratory of Mesoscopic Chemistry of MOE Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Supramolecular polymers constructed by orthogonal self-assembly based on multiple hydrogen bonding and macrocyclic host-guest interactions have received increasing attention due to their elegant structures,outstanding properties,and potential *** bonding endows these supramolecular polymers with good adaptability and reversibility,while macrocyclic host-guest interactions give them good selectivity and versatile ***,functional supramolecular polymers fabricated by these two highly specific,noninterfering interactions in an orthogonal way have shown wide applications in the fields of molecular machines,electronics,soft materials,*** this review,we discuss the recent advances of functional supramolecular polymers fabricated by orthogonal self-assembly based on multiple hydroge n bonding and host-guest *** particular,we focus on crown ether-and pillar[n]arene-based supramolecular polymers due to their compatibility with multiple hydrogen bonds in organic *** fabrication strategies,interesting properties,and potential applications of these advanced supramolecular materials are mainly concerned.

关键词： Supramolecular polymer Orthogonal self-assembly Hydrogen bonding Host-guest interactions Stimuli-responsiveness

The synthesis,characterization and X-ray diffractometry structure of fluorine-containing cyclobis(paraquat-p-phenylene) tetracation

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Chinese Chemical Letters 2010年第6期21卷 633-636页

作者： Hai Tao Xi Tian Tian Yi xiao qiang sun Key Laboratory of Fine Petrochemical Engineering Jiangsu Polytechnic UniversityChangzhou 213164China

Two novel fluorine-containing cyclophanes 1 and 2 incorporating a 1,4-bismethylfluorophenylene subunits have been synthesized via the template-directed clipping methodology and their structure was characterized by ~1H NMR,^(13)C NMR, MALDI-TOF-MS and elemental analysis.X-ray diffraction analysis of the solid state molecular structure showed that the complex units are linked by non-classical C-H…F hydrogen bonding.

关键词： Fluorine-cotiaining cyclophanes 1,4-Bis(bromomethyl)-2-fluorobenzene Crystal structure Synthesis

Asymmetric Michael addition reactions catalyzed by a novel upper-rim functionalized calix[4]squaramide organocatalyst

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Chinese Chemical Letters 2020年第12期31卷 3259-3262页

作者： Ke Yang Zhiyan Ma Hong-xiao Tong xiao-qiang sun xiao-Yu Hu Zheng-Yi Li Jingsu Key Laboratory of Advanced Catalytic Materials&Technology School of Petrochemical EnginerngChangzhou LniversityChangzhou 213184China College of Material Science and Technology Nanjing University of Aeronatutics and AstronauricsNanjing 211100China

A novel upper-rim functionalized calix[4]squaramide organocatalyst bearing bis-squaramide and cyclohexanediamine scaffolds was designed and prepared to catalyse a serial of asymmetric Michael addition of 1,3-dicarbo nyl compounds to a,β-unsaturated carbonyl compounds in high yields(up to 99%)and good to excellent enantiomeric excesses(up to 99%ee).The comparative experiments indicated that the cooperative effect between calixarenes cavitives and chiral catalytic centers on this calix[4]squaramide catalyst could promote these ***,this strategy also provides valuable and easy access to chiral chromene,naphthoquinone and acetylacetone derivatives,which are important skeletons in biological and pharmaceutical compounds.

关键词： Calixsquaramide Supramolecular catalyst Asymmetric catalysis Michael addition Organic synthesis

Fuzzy Sliding Mode Control for the Vehicle Height and Leveling Adjustment System of an Electronic Air Suspension

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Chinese Journal of Mechanical Engineering 2018年第2期31卷 238-250页

作者： xiao-qiang sun Ying-Feng Cai Chao-Chun Yuan Shao-Hua Wang Long Chen Automotive Engineering Research Institute Jiangsu University School of Automotive and Traffic Engineering Jiangsu University

The accurate control for the vehicle height and leveling adjustment system of an electronic air suspension(EAS) still is a challenging problem that has not been effectively solved in prior researches. This paper proposes a new adaptive controller to control the vehicle height and to adjust the roll and pitch angles of the vehicle body(leveling control) during the vehicle height adjustment procedures by an EAS system. A nonlinear mechanism model of the full?car vehicle height adjustment system is established to reflect the system dynamic behaviors and to derive the system optimal control law. To deal with the nonlinear characters in the vehicle height and leveling adjustment processes, the nonlinear system model is globally linearized through the state feedback method. On this basis, a fuzzy sliding mode controller(FSMC) is designed to improve the control accuracy of the vehicle height adjustment and to reduce the peak values of the roll and pitch angles of the vehicle body. To verify the effectiveness of the proposed control method more accurately, the full?car EAS system model programmed using AMESim is also given. Then, the co?simulation study of the FSMC performance can be conducted. Finally, actual vehicle tests are performed with a city bus, and the test results illustrate that the vehicle height adjustment performance is effectively guaranteed by the FSMC, and the peak values of the roll and pitch angles of the vehicle body during the vehicle height adjustment procedures are also reduced significantly. This research proposes an effective control methodology for the vehicle height and leveling adjustment system of an EAS, which provides a favorable control performance for the system.

关键词： Electronic air suspension Height adjustment Leveling control Fuzzy sliding mode control Vehicle tests

Artificial stepwise light harvesting system in water constructed by quadruple hydrogen bonding supramolecular polymeric nanoparticles

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Chinese Chemical Letters 2024年第2期35卷 370-373页

作者： Tangxin xiao Xiuxiu Li Liangliang Zhang Kai Diao Zheng-Yi Li xiao-qiang sun Leyong Wang Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Stepwise energy transfer is ubiquitous in natural photosynthesis,which greatly promotes the widespread use of solar ***,we constructed a supramolecular light harvesting system based on sequential energy transfer through the hierarchical self-assembly of M,which contains a cyanostilbene core flanked by two ureidopyrimidinone motifs,endowing itself with both aggregation-induced emission behavior and quadruple hydrogen bonding *** monomer M can self-assemble into hydrogen bonded polymers and then form supramolecular polymeric nanoparticles in water through a mini-emulsion *** nanoparticles were further utilized to encapsulate the relay acceptor ESY and the final acceptor NDI to form a two-step FRET *** fluorescence including a white-light emission was successfully *** work not only shows a desirable way for the fabrication of efficient two-step light harvesting systems,but also shows great potential in tunable photoluminescent nanomaterials.

关键词： Light harvesting system Supramolecular polymer Quadruple hydrogen bonding AIE Self-assembly

Preparation of a fixed-tetraphenylethylene motif bridged ditopic benzo-21-crown-7 and its application for constructing AIE supramolecular polymers

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Chinese Chemical Letters 2021年第4期32卷 1377-1380页

作者： Tangxin xiao Jie Wang Yong Shen Cheng Bao Zheng-Yi Li xiao-qiang sun Leyong Wang School of Petrochemical Engineering Changzhou UniversityChangzhou 213164China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210023China

Benzo-21-crown-7(B21 C7)is one of the most important crown ethers,which not only shows excellent physicochemical properties but also exhibits promising binding capability with dialkylammonium *** this paper,we designed and synthesized a fixed-tetraphenylethylene(FTPE)motif bridged ditopic benzo-21-crown-7 molecule(H).The fixed tetraphenylethylene motif endows H with aggregation induced emission(AIE)prope *** the presence of a ditopic dialkylammonium salt guest molecule(G),a fluorescent supramolecular polymer with golden luminescent property could be *** B21 C7-based host-guest supramolecular polymer with golden fluorescence may have potential application in dynamic luminescent materials.

关键词： Benzo-21-crown-7 Host-guest interaction Supramolecular polymer Fluorescent materials AIE

Dynamic materials fabricated from water soluble pillar[n]arenes bearing triethylene oxide groups

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Chinese Chemical Letters 2019年第2期30卷 271-276页

作者： Tangxin xiao Ling Zhou Lixiang Xu Weiwei Zhong Wei Zhao xiao-qiang sun Robert B.P.Elmes School of Petrochemical Engineering Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou University Department of Chemistry Maynooth University National University of Ireland

Pillar[n]arenes are a new kind of supramolecular macrocyclic hosts which have developed rapidly due to their unique topology and high functionality, giving rise to many applications in the construction of interesting and functional materials. Among them, water-soluble pillar[n]arenes bearing triethylene oxide (TEO) chains have drawn increasing research interest due to their advantageous properties. In this review, we summarized the recent progress of dynamic materials fabricated from water soluble pillar[n]arenes bearing TEO groups, including thermo responsive materials with lower critical solution temperature (LCST) behavior, cyclic host liquids, and smart windows. It is anticipated that more and more ‘smart' supramolecular materials based on modified pillar[n]arenes will be developed in this burgeoning area of research.

关键词： Pillar[n]arenes Host-guest interactions LCST Thermoresponsive materials Smart window

Artificial light-harvesting systems fabricated by supramolecular host–guest interactions

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Chinese Chemical Letters 2019年第1期30卷 31-36页

作者： Tangxin xiao Weiwei Zhong Ling Zhou Lixiang Xu xiao-qiang sun Robert B.P.Elmes xiao-Yu Hu Leyong Wang School of Petrochemical Engineering Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou University Department of Chemistry Maynooth University National University of Ireland Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University

Artificial light-harvesting systems(LHSs) have drawn increasing research interest in recent times due to the energy crisis worldwide. Concurrently, macrocycle-based host–guest interactions have played an important role in the development of supramolecular chemistry. In recent years, studies towards artificial LHSs driven by macrocycle-based host–guest interactions are gradually being disclosed. In this mini-review, we briefly introduce the burgeoning progress of artificial LHSs driven by host–guest interactions. We believe that an increasing number of reports of artificial LHSs driven by host–guest interactions will appear in the near future and will provide a viable alternative for the future production of renewable energy.

关键词： Light-harvesting systems Macrocycle Host-guest interactions Supramolecular chemistry Self-assembly

En bloc resection for treatment of refractory pre-auricular fistula

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Journal of Otology 2015年第4期10卷 163-166页

作者： Jing Fei Di Zhang xiao-qiang sun Chong Zhao Gang Qin Yue-hua Liu Lin Zhu Lei-ji Li Department of Otorhinolaryngology Head and Neck Surgery Affiliated Hospital of Luzhou Medical College

Objective:To report a surgical method for the treatment of pre-auricular fistula to lower post-operative recurrence rate. Methods:Clinical data of 187 patients with pre-auricular fistula who underwent en bloc resection at the Affiliated Hospital of Luzhou Medical College from August 2006 to November 2012 were retrospectively reviewed. Factors that might affect the prognosis following En bloc fistula resection bordered by the superficial temporalis fascia, helix perichondrium and auriculocephalic sulcus were investigated. Results: Of the 187 patients, 181 achieved primary healing and 6 ended up with delayed healing. During the follow-up period (one to seven years), there were 4 cases of recurrence (2.1%). Conclusions:Clear demarcation of surgical resection can facilitate easy and thorough resection of preauricular fistula and lead to low recurrence rate. Proper timing and careful search for potential fistula branches are the two crucial factors affecting prognosis. Copyright ? 2016, PLA General Hospital Department of Otolaryngology Head and Neck Surgery. Production and hosting by Elsevier (Singapore) Pte Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Pre-auricular fistula Temporalis fascia Helix perichondrium Surgery Infection