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| 1 | Selectivity enhancement of quaternized poly(arylene ether ketone)membranes by ion segregation for vanadium redox flow batteries显示文摘Quaternary ammonium densely functionalized octa-benzylmethyl-containing poly(arylene ether ketone)s(QA-OMPAEKs) with ion exchange capacities(IECs) ranging from 1.23 to 2.21 mmol g^(-1) were synthesized from:(1) Ullmann coupling extension of tetra-benzylmethyl-containing bisphenol A;(2) condensation polymerization with activated dihalide in the presence of K_2CO_3;(3) selective bromination using N-bromosuccinimide; and(4) quantitative quaternization using trimethylamine. Both smallangle X-ray scattering(SAXS) and transmission electron microscope(TEM) characterizations revealed distinct nano-phase separation in QA-OMPAEKs as a result of the dense quaternization. The QA-OMPAEK-20 with an IEC of 1.98 mmol g^(-1) exhibited a high SO_4^(2-) conductivity of 11.4 mS cm^(-1) and a low VO^(2+) permeability of 0.06×10^(-12) m^2 s^(-1) at room temperature,leading to a dramatically higher ion selectivity than Nafion N212. Consequently, the vanadium redox flow battery(VRFB)assembled with QA-OMPAEK-20 achieved a Coulombic efficiency of 96.9% and an energy efficiency of 84.8% at a current density of 50 mA cm^(-2), which were much higher than those of the batteries assembled with Nafion N212 and a home-made control membrane without distinct nano-phase separation. Therefore, ion segregation is demonstrated to be a strategical route for the design of high performance anion exchange membranes(AEMs) for VRFBs. | Yu Chen Zhongcheng Liu Meijin Lin Qilang Lin Bihai Tong Dongyang Chen | 2019 | Science China Chemistry2019，62，4： | 6 |
| 2 | Tetra-alkylsulfonate functionalized poly(aryl ether) membranes with nanosized hydrophilic channels for efficient proton conduction显示文摘The microstructure of polymer electrolyte membranes plays a key role in ion conductivity and water transport.Herein,fluorinated poly(aryl ether)s with tetra-alkylsulfonate side chains(SFPAEs)have been successfully synthesized from the copolymerization of a newly developed tetra-allyl-containing bisphenol(TABP)monomer,followed by the thiol-ene addition with sodium 3-mercapto-1-propanesulfonate to attach the ionic groups at the end of the flexible chains.Being the first of its kind,the densely distributed and lengthy alkylsulfonate group possesses the benefit of ease to self-assemble into hydrophilic domains during membrane preparation via solution casting.Indeed,the TEM characterizations revealed that distinct hydrophilic channels of 1-2 nm width had been formed,much larger than those of a home-made control sample where only di-alkylsulfonate side chains were attached.The SFPAE-4-45 with an IECw of 2.0 mmol g^-1 exhibited an enhanced proton conductivity of 143.7 m S cm^-1 at room temperature,which was superior to that of Nafion 212(91.0 m S cm^-1).Furthermore,the oxidative stabilities of SFPAEs were significantly higher than those of non-fluorinated analogs in literature.This study offered a new route to engineering the pendent structure of ionomers for well-defined microscopic morphologies. | Lijun Zhou Junyang Zhu Meijin Lin Jiaqi Xu Zailai Xie Dongyang Chen | 2020 | Journal of Energy Chemistry2020，29，1： | 4 |
| 3 | Advances in high-resolution nuclear magnetic resonance methods in inhomogeneous magnetic fields using intermolecular multiple quantum coherences显示文摘Strong and extremely homogeneous static magnetic field is usually required for high-resolution nu-clear magnetic resonance (NMR). However, in the cases of in vivo and so on, the magnetic field inho-mogeneity owing to magnetic susceptibility variation in samples is unavoidable and hard to eliminate by conventional methods such as shimming. Recently, intermolecular multiple quantum coherences (iMQCs) have been employed to eliminate inhomogeneous broadening and obtain high-resolution NMR spectra, especially for in vivo samples. Compared to other high-resolution NMR methods, iMQC method exhibits its unique feature and advantage. It simultaneously holds information of chemical shifts, multiplet structures, coupling constants, and relative peak areas. All the information is often used to analyze and characterize molecular structures in conventional one-dimensional NMR spec-troscopy. In this work, recent technical developments including our results in this field are summarized; the high-resolution mechanism is analyzed and comparison with other methods based on interactions between spins is made; comments on the current situation and outlook on the research directions are also made. | CHEN Zhong LIN MeiJin CHEN Xi CAI ShuHui | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，1： | 3 |
| 4 | The role of the PI3K-Akt signal transduction pathway in Autographa californica multiple nucleopolyhedrovirus infection of Spodoptera frugiperda cells显示文摘 | Wei Xiao Yi Yang Qingbei Weng Tiehao Lin Meijin Yuan Kai Yang Yi Pang | 2009 | Virology2009，，1： | 1 |
| 5 | Are the Fama–French factors good proxies for latent risk factors? Evidence from the data of SHSE in China显示文摘 | Jianhao Lin Meijin Wang Lingfeng Cai | 2012 | Economics Letters2012，，2： | 1 |
| 6 | Clinicopathologic variables predicting tumor response to neoadjuvant chemotherapy in patients with locally advanced gastric cancer显示文摘 | Lin BoWang Rong YueTeng Zi NongJiang Wen XianHu Min JunDong Xiao MingYuan Wen JunChen MeiJin Jian GuoShen | 2012 | J Surg Oncol2012，，3： | 1 |
| 7 | The impact of vertical π-extension on redox mechanisms of aromatic diimide dyes显示文摘Aromatic diimide dyes are an attractive class of redox-active organic molecules for lithium-ion batteries,whose battery performances(stabilities,conductivities and cyclicities) are strongly dependent on the sizes of their π-systems.However,due to the different Clar’s structures possessed,three vertically7 r-extended aromatic diimides,namely,naphthalene diimide(two one-electron reductions),perylene diimide and terrylene diimide(two one-electron reductions),exhibit different electronic redox mechanisms when served as cathode materials in organic lithium-ion batteries.Herein,we have studied carefully the different electrochemical characteristics of the three aromatic diimides through experimental and theoretical calculations.Their battery present different shape of charge/discharge curves resulting from stability of their reduction state during charge/discharge process.Terrylene diimide shows better cycle and rate capacities than those of naphthalene diimide and perylene diimide,which could be attributed to the more energies released during terrylene diimide combining with lithium ions than those of other two diimides. | Lei Li Juejun Wang Mengting Chen Yong Chen Wangchuan Xiao Dongyang Chen Meijin Lin | 2019 | Chinese Chemical Letters2019，30，12： | 0 |
| 8 | The 10^(th)macrocylic arene supramolecular chemistry symposium显示文摘In the last few decades,there has been a rapid emergence and growing interest in synthetic macrocyclic arenes,such as calixarenes[1,2],cyclophanes[3],cyclotriveratrylenes[4],pillararenes[5-7],and other novel macrocyclic arenes[8-10].These molecules have garnered significant attention in supramolecular chemistry for their fascinating structures,intrinsic cavities,ease of structural and property modifications and wide range of applications[11-14]. | Shuquan Zhang Meijin Lin Andrew C.H.Sue Liping Cao Feng Wang Cheng Yang Tao Tu Feihe Huang Leyong Wang | 2023 | Chinese Chemical Letters2023，34，12： | 0 |
| 9 | A novel conformationally adaptive macrocyclic tetramaleimide with flipping pyrene sidewalls显示文摘The synthesis,structure,and properties of pyrene-based conformationally adaptive macrocycles are described.This new type of conformationally adaptive macrocycle was constructed through Perkin reaction,followed by imidization.By changing the condensation partner as the linking unit,a family of conjugated macrocycles with different sizes of the cavity was synthesized,which provide a simple and modular synthetic strategy towards the conformationally adaptive macrocycles.Furthermore,the macrocycles provide two well-defined conformations through flipping pyrene subunit,which were unambiguously determined by single-crystal X-ray diffraction analysis.The conformational interconversion barrier was determined by density functional theory(DFT)calculations.This new macrocycle also demonstrated unique properties,such as vapochromic behavior and aggregation emission enhancement effect.Furthermore,we have also investigated the effect of the linker on the shape and photophysical properties of the resulting macrocyclic products. | Lingyun Zhu Wei Zeng Menghua Li Meijin Lin | 2022 | Chinese Chemical Letters2022，33，1： | 0 |
| 10 | Photoactive donor-acceptor conjugated macrocycles:New opportunities for supramolecular chemistry显示文摘The design and synthesis of photoactive macrocyclic molecules continue to attract attention because such species play important roles in supramolecular chemistry as well as photoelectronic applications.Donoracceptor(D-A)conjugated macrocycles are an emerging class of photoactive molecules due to their D-A conjugated structural characteristics and tunable optical properties.In addition,the well-defined cavities in such D-A macrocycles endow them with versatile host-guest properties.In this review,we provide a comprehensive summary of D-A conjugated macrocycle chemistry,detailing recent progress in the area of synthetic methods,optical properties,host-guest chemistry and applications of the underlying chemistry to chemical sensors,bioimaging and photoelectronic devices.Our objective is to provide not only a review of the fundamental findings,but also to outline future research directions where D-A conjugated macrocycles and their constructs may have a role to play. | Shanyuan Zhong Lingyun Zhu Shuai Wu Yuanming Li Meijin Lin | 2023 | Chinese Chemical Letters2023，34，8： | 0 |
| 11 | Recent advances in metal-organic frameworks for X-ray detection显示文摘Metal-organic frameworks(MOFs)are a class of fascinating supramolecular crystalline materials that have been widely developed for catalysis,gas storage,illumination,drug delivery/cytoprotection,and so on.Recently,MOFs have been found to have potential applications in X-ray detection due to their high sensitivity,fast response time,high absorption coefficient,and radiation stability.In this review,we present an overview on the fundamental mechanism of using MOFs for X-ray scintillation.We further discuss the recent developments in X-ray detection based on indirect X-ray scintillation and direct X-ray conversion.Finally,we provide a summary and a perspective on the future of this promising research field. | Hongming Chen Jingru Chen Menghua Li Minghua You Qiushui Chen Meijin Lin Huanghao Yang | 2022 | Science China Chemistry2022，65，12： | 0 |
| 12 | 1,1’-Binaphthol annulated perylene diimides: Aggregation-induced emission enhancement and chirality inversion显示文摘Aggregation-induced emission enhancement and aggregation-induced chirality inversion are two individ-ual phenomena for the enantiomerically pure organic dyes in the aggregates.Herein we reported for the first time that these two interesting phenomena could be observed simultaneously in the aggregated states of enantiomerically pure S/R-1,1?-binaphthol annulated perylene diimides,in which two perylene diimides moieties were bridged by S/R-1,1?-binaphthol(BINOL)at the bay positions.Owing to the rotat-able C2 axes between two naphthol annulated perylene diimides moieties,both of them display intrinsic behaviors of aggregation-induced emission enhancements.At the same time,due to the steric hindrances in the imide and methoxy positions,the neighboring twoπ-systems of these two unique polycyclic aro-matic imides in poor solvents are preferable to adopt a cross-stacking mode and thus form helical X-aggregates of opposite chirality(M/P)with chirality inversion characteristics in their circular dichroism and circularly polarized luminescence spectroscopic studies. | Yang Zhang Juejun Wang Hongming Chen Meijin Lin | 2022 | Chinese Chemical Letters2022，33，5： | 0 |
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