A fluorescent supramolecular polymer network with an excellent triple-stimuli responsive property based on metal-ligand coordination and host-guest interactions has been constructed from a terpyridine-monofunctionaliz...A fluorescent supramolecular polymer network with an excellent triple-stimuli responsive property based on metal-ligand coordination and host-guest interactions has been constructed from a terpyridine-monofunctionalized leaning tower[6]arene,a tetraphenylethylene AIEgen,and a bridging coordination ion(Zn^2+).Addition of competitive binding agents,trifluoroacetic acid,and/or pillar[5]arene can break the metal coordination and/or host-guest inclusion complexation,and thermal heating can weaken the non-covalent interactions in the supramolecular polymer gel,all leading to the gel-to-sol transition.展开更多
Pillar[n]arenes(pillarenes for short)are a relatively new generation of macrocyclic host compounds with rigid cylinder architectures containing several hydroquinone units that are bridged by methylene(−CH2−)at their p...Pillar[n]arenes(pillarenes for short)are a relatively new generation of macrocyclic host compounds with rigid cylinder architectures containing several hydroquinone units that are bridged by methylene(−CH2−)at their para positions.The investigation of pillarenes has expanded from the sole domain of supramolecular chemistry to invoke immense interest among scientists striving to exploit intelligent materials or functional systems,with regard to their fascinating attributes such as symmetric structures,tailorable functionalization,and unique host−guest properties.Over the past few years,researchers have focused on the construction of prominent supramolecular architectures such as supramolecular switches,supramolecular polymers,and self-assembled amphiphilic systems on the basis of host−guest chemistry in collaboration with other noncovalent interactions.One of the most attractive characteristics of these supramolecular assemblies relies on the tunable mechanical motions via switching of the most conformationally and thermally stable structures in a dynamic and reversible manner,which could be affected by the external conditions and enable the reciprocal effect with surrounding environments.Consequently,macrocyclic arenes are the key components of stimuli-responsive supramolecular assemblies,serving as important candidates in the construction of advanced supramolecular materials,including organic functional systems and organic−inorganic hybrid systems.In this Account,we present a relatively elaborate summary of the significant and typical intelligent systems containing pillarenes and their extended versions with a focus on our own contributions to this field during the past decade.Finally,in the last section of the review,challenges and perspectives are given.展开更多
基金the National Natural Science Foundation of China (No. 21871108) for financial support
文摘A fluorescent supramolecular polymer network with an excellent triple-stimuli responsive property based on metal-ligand coordination and host-guest interactions has been constructed from a terpyridine-monofunctionalized leaning tower[6]arene,a tetraphenylethylene AIEgen,and a bridging coordination ion(Zn^2+).Addition of competitive binding agents,trifluoroacetic acid,and/or pillar[5]arene can break the metal coordination and/or host-guest inclusion complexation,and thermal heating can weaken the non-covalent interactions in the supramolecular polymer gel,all leading to the gel-to-sol transition.
基金the National Natural Science Foundation of China(21871108)the Jilin Province-University Cooperative Construction Project-Special Funds for New Materials(SXGJSF2017-3)the Jilin University Talents Cultivation Program for financial support.
文摘Pillar[n]arenes(pillarenes for short)are a relatively new generation of macrocyclic host compounds with rigid cylinder architectures containing several hydroquinone units that are bridged by methylene(−CH2−)at their para positions.The investigation of pillarenes has expanded from the sole domain of supramolecular chemistry to invoke immense interest among scientists striving to exploit intelligent materials or functional systems,with regard to their fascinating attributes such as symmetric structures,tailorable functionalization,and unique host−guest properties.Over the past few years,researchers have focused on the construction of prominent supramolecular architectures such as supramolecular switches,supramolecular polymers,and self-assembled amphiphilic systems on the basis of host−guest chemistry in collaboration with other noncovalent interactions.One of the most attractive characteristics of these supramolecular assemblies relies on the tunable mechanical motions via switching of the most conformationally and thermally stable structures in a dynamic and reversible manner,which could be affected by the external conditions and enable the reciprocal effect with surrounding environments.Consequently,macrocyclic arenes are the key components of stimuli-responsive supramolecular assemblies,serving as important candidates in the construction of advanced supramolecular materials,including organic functional systems and organic−inorganic hybrid systems.In this Account,we present a relatively elaborate summary of the significant and typical intelligent systems containing pillarenes and their extended versions with a focus on our own contributions to this field during the past decade.Finally,in the last section of the review,challenges and perspectives are given.