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The emerging applications of pillararene architectures in supramolecular catalysis

Chinese Chemical Letters 2022年第1期33卷 89-96页

作者： Kaiya Wang Xueqi Tian Jacobs H.Jordan Krishnasamy Velmurugan Leyong Wang Xiao-Yu Hu College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China The Southern Regional Research Center Agricultural Research ServiceUSDANew OrleansLA 70124United States Key Laboratory of Mesoscopic chemistry of MOE School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Over the last decade,numerous research efforts have been devoted to pillar[n]arenes since their debut.The popularity of pillararenes is a reflection of current research trend in supramolecular and macrocyclic chemistry in general.Among the vast applications(such as chemosensors,drug delivery,transmembrance channels,and separation)of pillararenes,their utilization in catalysis is a relatively less explored area.However,soaring attention has been paid by researchers in recent years and this field has seen gradual increasing publications.Therefore,in this review we will discuss progress in the emerging applications of pillararene architectures in catalysis based on various reaction genre including reduction,oxidation,coupling,decomposition and others.Furthermore,this review not only focuses on the pillararenes based current progress in catalysis,but also provides the signs for future development in this research field.

关键词： Supramolecular catalysis Host–guest chemistry Macrocycles Pillararene Self-assembly

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Stabilization and Multiple-Responsive Recognition of Natural Base Pairs in Water by a Cationic Cage

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CCS chemistry 2022年第9期4卷 2914-2920页

作者： Lin Cheng Ping Tian Qingfang Li Anyang Li Liping Cao College of chemistry and Materials Science Northwest UniversityXi’an 710069

The hydrogen-bonded(H-bonded)base pairs,double H-bonded A•T and triple H-bonded G•C in DNA,are important units for storing,encoding,and expressing genetic information.Owing to the interference from water,however,the formation of H-bonded base pairs from short deoxynucleotide fragments such as mono-or di-deoxynucleotide are not easily achieved in aqueous solutions.

关键词： Host–guest chemistry chiral recognition adaptive chirality tetraphenylethene-based cationic cage base pair

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Enantioselective Recognition of Neutral Molecules in Water by a Pair of Chiral Biomimetic Macrocyclic Receptors

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CCS chemistry 2020年第6期2卷 440-452页

作者： Hongxin Chai Zhao Chen Sheng-Hua Wang Mao Quan Liu-Pan Yang Hua Ke Wei Jiang Shenzhen Grubbs Institute Guangdong Provincial Key Laboratory of Catalysisand Department of ChemistrySouthern University of Science and TechnologyXueyuan Blvd 1088Shenzhen518055 Department of chemistry National University of Singapore3 Science Drive 3117543

Enantioselective recognition in water remains an ongoing challenge in supramolecular chemistry but is routine in nature.Herein,we report the first enantiopure pair of biomimetic macrocyclic receptors with hydrogen bonding donors in their deep hydrophobic cavities.The chiral naphthotubes can be efficiently synthesized through a chirality-directed macrocyclization strategy and are able to discriminate the enantiomers of neutral chiral molecules in water.Density functional theory calculations reveal that the“three-point contact”model effectively explains their enantioselectivity.The differential noncovalent interactions inside the hydrophobic cavity are responsible for the enantioselective recognition.Moreover,these chiral naphthotubes are both fluorescent and circular dichroism(CD)-active.In CD spectroscopy,they have been demonstrated to have the ability to detect nonchromophoric,achiral molecules in water.And,the use of fluorescence spectroscopy has aided in the determination of the enantiomeric excess(ee)values of chiral molecules.The results and conclusions obtained with these chiral biomimetic receptors can be used to better understand enantioselective recognition in biological systems.

关键词： enantioselective recognition in water macrocyclic receptors Host–guest chemistry molecular sensor

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A hybrid hydrogel based on clay nanoplatelets and host–guest inclusion complexes

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Chinese Chemical Letters 2016年第4期27卷 583-587页

作者： Xiao-Juan Liao Guo-Song Chen School of chemistry and Molecular Engineering East China Normal University Shanghai 200241 China State Key Laboratory of Molecular Engineering of Polymers Fudan University Shanghai 200433 China

In this work,a monomer with double bond was introduced to the surface of clay nanosheets via inclusion complexation between cyclodextrin（CD）host and azobenzene（Azo）guest,as well as electrostatic interaction between clay nanoplatelets and cations of azobenzene derivatives.The obtained suprastructure acts as a supramolecular cross-linker in its copolymerization with macromonomer PEG resulting in a hybrid supramolecular hydrogel.Only viscous liquid was obtained in the absence of clay nanoplatelets,revealing the supramolecular cross-linker played an important role in the hydrogel formation.Such hybrid supramolecular hydrogel exhibited good stability and shear thinning property.

关键词： Host–guest chemistry Clay Supramolecular hydrogel Cyclodextrin Electrostatic interaction

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Supramolecular Polymerization Powered by Escherichia coli:Fabricating a Near-Infrared Photothermal Antibacterial Agent in Situ

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CCS chemistry 2022年第10期4卷 3285-3295页

作者： Zihe Yin Yuchong Yang Jinpeng Yang Guobin Song Hao Hu Peng Zheng Jiang-Fei Xu Key Lab of Organic Optoelectronics and Molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084 State Key Laboratory of Coordination chemistry Chemistry and Biomedicine Innovation Center(ChemBIC)School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023

An Escherichia coli reduction-powered supramolecular polymerization is reported,leading to the fabrication of a near-infrared(NIR)photothermal antibacterial agent in situ.To this end,a bifunctional monomer containing two viologen moieties was designed.WhenincubatingE.coli with thebifunctional monomer and cucurbit[8]uril,viologen moieties were reduced to viologen cation radicals by E.coli,and a supramolecular polymer with supramolecular dimers of viologen cation radicals integrated into the main chain was fabricated on the surface of E.coli.

关键词： supramolecular polymers Host–guest chemistry photothermal antibacterial NIR photothermal conversion selective antibacterial

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