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Stepwise assembly to construct stable copper(I) cluster-based circularly polarized luminescent MOFs

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Science China Chemistry 2025年

作者： Jing-Wen Xie Meng-Ting Wang Yan Jin Si Li Jian-Hua Qin Shuang-Quan Zang Tomas C.W.Mak College of Chemistry Henan Key Laboratory of Crystalline Molecular Functional Materials Zhengzhou University College of Chemistry and Chemical engineering Luoyang Normal University Department of Chemistry The Chinese University of Hong Kong

Circularly polarized luminescence （cpl） materials have been extensively studied in recent years owing to their widespread applications in 3D display,optical storage,optical anti-counterfeiting,and biological imaging,***（I） clusters have emerged as a promising candidate for cpl materials,driven by their cost-effectiveness,superior luminescent properties,precise structure,and low ***,the poor environmental stability of copper（I） clusters renders their synthesis and preservation challenging,thereby significantly impeding their ***,we have designed and synthesised a chiral double-coordinated ligand in order to construct copper（I） cluster nodes that can be further *** anticipated,by utilizing stepwise assembly strategy,a Cu4cluster node co-modified by chiral alkynyl ligands and triphenylphosphine was further assembled with Cd2+ions to obtain 2D layers structure,L/*** L/D-Cu4-Cd exhibits excellent stability and optical properties,including bright yellow emission,solvent-responsive luminescence,and cpl activity with a maximum glumup to 2.0×10-3,which shows potential applications in the WLED and *** interestingly,the material also exhibits deflection ability towards different wavelengths of linearly polarized light,showing certain potential in the preparation of circular polarizer.

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Cyclotriphosphazene Fibre Reinforced Poly(benzoxazine-co-ε-caprolactam) Nanocomposites for Flame Retardant Applications

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Chinese Journal of Polymer Science 2014年第8期32卷 1086-1098页

作者： M.Selvi S.Devaraju K.Sethuraman R.Revathi M.Alagar Polymer Composite Lab Department of Chemical Engineering Anna University Next MEMS Lab School of Mechanical Engineering Pusan National University

Cyclophosphazene nanotube （PZT） incorporated poly（benzoxazine-co-g-caprolactam）（P（BZ-co-cpl）） nano- composites were developed for improving flame retardant properties. The effects of PZT on the flammability properties of P（BZ-co-cpl） matrix were evaluated through UL-94 flammability test and limiting oxygen index （LOI）. The UL-94 results of P（BZ-co-cpl）/PZT hybrid nanocomposites showed V-1 rating, whereas neat P（BZ-co-cpl） showed burning rating. The LOI values are increased from 25.4 to 31.4 for 1.5 wt% PZT incorporated P（BZ-co-cpl） nanocomposite systems. SEM was used to study the char morphology of P（BZ-co-cpl）/PZT after being exposed to UL-94 flammability test. Data from thermal studies indicate that the PZT incorporated P（BZ-co-cpl） systems possess better Tg and thermal degradation behavior when compared to the neat P（BZ-co-cpl）. The values of dielectric constant are decreased with increasing temperature. From the values, it is ascertained that the P（BZ-co-cpl）/PZT systems exhibit stable dielectric behavior with regard to variation in temperature. The TEM images ascertain the uniform dispersion of PZT in the P（BZ-co-cpl） matrix.

关键词： Polybenzoxazine Phosphazene Flame retardant Dielectric properties.

MOSFET-like CNFET based logic gate library for low-power application:a comparative study

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Journal of Semiconductors 2014年第7期35卷 112-124页

作者： P.A.Gowri Sankar K.Udhayakumar Department of Electrical engineering Anna University

The next generation oflogic gate devices are expected to depend upon radically new technologies mainly due to the increasing difficulties and limitations of existing CMOS technology. MOSFET like CNFETs should ideally be the best devices to work with for high-performance VLS1. This paper presents results of a comprehensive comparative study of MOSFET-like carbon nanotube field effect transistors （CNFETs） technology based logic gate library for high-speed, low-power operation than conventional bulk CMOS libraries. It focuses on comparing four promising logic families namely： complementary-CMOS （C-CMOS）, transmission gate （TG）, complementary pass logic （cpl） and Domino logic （DL） styles are presented. Based on these logic styles, the proposed library of static and dynamic NAND-NOR logic gates, XOR, multiplexer and full adder functions are implemented efficiently and carefully analyzed with a test bench to measure propagation delay and power dissipation as a function of supply voltage. This analysis provides the right choice of logic style for low-power, high-speed applications. Proposed logic gates libraries are simulated using Synopsys HSPICE based on the standard 32 nm CNFET model. The simulation results demonstrate that, it is best to use C-CMOS logic style gates that are implemented in CNFET technology which are superior in performance compared to other logic styles, because of their low average powerdelay-product （PDP）. The analysis also demonstrates how the optimum supply voltage varies with logic styles in ultra-low power systems. The robustness of the proposed logic gate library is also compared with conventional and state-art of CMOS logic gate libraries.

关键词： CNFET digital integrated circuits logic gate design low-voltage low-power logic styles

Structure and resistance of concentration polar layer on cation exchange membrane-solution interface

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Transactions of Nonferrous Metals Society of China 2006年第6期7卷 1436-1441页

作者：桑商斌黄可龙李晓刚王显 School of Chemistry and Chemical engineering Central South University

Membrane/solution interface consists of a neutral concentration polai layer(cpl) and a charge layer(CL) under external electrical field, and the neutral cpl can be neglected under high frequency AC electrical field. The relationship of CL thickness e with electrolyte concentration C and fixed ion exchange sites density σ in membrane surface layer can be expressed as e

关键词： ion exchange membrane AC electrical field AC impedance membrane/solution interface structure resistance

Memorable full-color circularly polarized luminescence from chiral co-assembled polymer films enabled by multipath transfer

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Science China Chemistry 2023年第4期66卷 1169-1178页

作者： Gong Zhang Yinglong Bao Menghan Pan Nianwei Wang Xiaoxiao Cheng Wei Zhang State and Local Joint engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Engineering Laboratory of Novel Functional Polymeric MaterialsSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China School of Chemical and Environmental engineering Anhui Polytechnic UniversityWuhu 241000China

The modulation of circularly polarized luminescence(cpl)is of importance for display and asymmetric chemical ***,the underlying mechanism of cpl transfer remains rarely ***,we rationally design a multipath transfer system including multistep chirality transfer(MCT)and sequential fluorescence resonance energy transfer(SFRET),and we are the first to fabricate memorable full-color cpl-active films with a high dissymmetry factor(~10^(-2)).Specifically,(P/M)-helical nanofibers are constructed by co-assembly between an achiral polymer,poly(9,9-di-n-octylfluorene)(PF8),and easy-to-remove R/*** matching achiral emitters are added,the PF8 mediates MCT and simultaneously triggers the SFRET ***,full-color cpl memory is realized after removing the chiral *** simulation and structure analysis indicate that the robust helical superstructure of PF8 provides chiral sites to accommodate emitters,which is essential for cpl transfer and *** work provides a novel strategy for constructing cpl-active materials in an aggregated state and insights into cpl transfer and memory.

关键词： chiral co-assembly chirality transfer multipath transfer memorable full-color cpl achiral polymer

In situ thermoresponsive supramolecular assembly for switchable circularly polarized luminescence

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Science China Chemistry 2024年第7期67卷 2362-2372页

作者： Menghan Pan Gong Zhang Haotian Ma Xiaoxiao Cheng Jieai Li Wei Zhang State and Local Joint engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Engineering Laboratory of Novel Functional Polymeric MaterialsSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China School of Chemical and Environmental engineering Anhui Polytechnic UniversityWuhu 241000China

The dynamic regulation of circularly polarized luminescence(cpl)holds profound significance in various fields,such as highlevel information storage and *** we developed a chiral amphiphilic molecule,CPSB-GLU-PEG350(CGP),composed of aggregation-induced emission(AIE)chromophores(Z)-4-(1-cyano-2-phenylvinyl)benzoic acid(CPSB),a chiral linker Glutamic acid and polyethylene glycol(PEG)thermoresponsive *** the self-assembled supramolecular system formed by CGP,we have achieved in-situ temperature-responsive chiral structures,facilitating the thermal control switch of the cpl *** dynamics simulations demonstrate the distinct behaviors of AIE and PEG units during the temperature-variable assembly ***,by co-assembling achiral dye molecules with CGP,we have expanded the color range of the temperature-responsive cpl assembly system in situ and confirmed the occurrence of circularly polarizedF?rster resonance energy transfer(C-FRET)phenomenon in this process,which successfully enriched the strategies for in-situ cpl control in aqueous *** addition,the contactless radiative energy transfer of cpl can also be realized in this system,exhibiting more flexible temperature regulation of the cpl *** study provides a convenient and universal strategy for the construction of dynamically smart chiroptical materials.

关键词： circularly polarized luminescence in-situ thermoresponsive supramolecular assembly energy transfer

engineering intermolecular charge transfer in chiral organometallic crystals by rational doping for high-contrast cpl switches

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Science China Chemistry 2023年第7期66卷 2011-2018页

作者： Ying-Jie Liu Liang Chen Zhao-Yang Wang Xi-Yan Dong Ya-Ke Li Shuang-Quan Zang Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001China College of Chemistry and Chemical engineering Henan Polytechnic UniversityJiaozuo 454003China

The development of circularly polarized luminescence(cpl)switches is of great importance but ***,a charge donor/acceptor pair comprising two chiral gold(I)-isocyanide complexes was designed to construct light-harvesting system via intermolecular charge-transfer(CT)*** doping nonemissive S-Au I into blue-emitting S-AuCN,(S-Au CN)_(1-x)(S-AuI)_(x)(0≤x≤3.4%)with tunable emission from blue to red was *** large red-shifted emission was realized based on the remarkable change of the electronic properties between the S-Au CN dimer and red-emitting(S-A CN)-(S-AuI)CT pair,and the resulting energy-transfer(En T)process between ***,the En T process can be switched off/on by external stimuli of grinding and CH_(2)Cl_(2)fuming,giving rise to high-contrast(blue versus red)cpl switching *** study opens a novel avenue for developing cpl switches by constructing light-harvesting CT-doped systems based on chiral organometallic complexes.

关键词： charge transfer energy transfer crystal engineering circularly polarized luminescence gold complex

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Multi‑color Tunable and White Circularly Polarized Luminescent Composite Nanofibers Electrospun from Chiral Helical Polymer

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Advanced Fiber Materials 2022年第6期4卷 1632-1644页

作者： Pengpeng Li Xiaobin Gao Biao Zhao Kai Pan Jianping Deng State Key Laboratory of Chemical Resource engineering College of Materials Science and EngineeringBeijing University of Chemical Technology100029 BeijingChina College of Materials Science and engineering Beijing University of Chemical Technology100029 BeijingChina

Circularly polarized luminescence(cpl)-active nanomaterials have attracted tremendous ***,it is still a big challenge to conveniently fabricate multi-color and white cpl-active nanomaterials on a large ***,a simple and scalable approach to achieve the above goals is *** cpl-active nanofibers are fabricated from chiral helical substituted polyacetylene,achiral fluorescent dyes and polyacrylonitrile via uniaxial electrospinning;the highest luminescence dissymmetry factor(glum)of the resulting nanofibers can reach 10^(−2).Furthermore,white cpl-active nanofibers are obtained by coaxial electrospinning,in which the resulting core-shell structure has excellent adjustability and can be utilized to physically isolate different fluorescent dyes to reduce energy transfer efficiency;therefore,stable white cpl emissions can be achieved with high g_(lum) values up to 10^(−3).Notably,the prepared white-emission cpl nanofibrous films show bright white circularly polarized light when coated on UV chips,demonstrating their future application in constructing low-cost and flexible light-emitting devices such as circularly polarized light-emitting diodes.

关键词： Chiral helical polymer Nanofiber Multi-color circularly polarized luminescence White-light emission

Flow and heat transfer characteristics in the porous wick condenser of cpl

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Science China(Technological Sciences) 2001年第5期44卷 499-506页

作者：曲艺彭晓峰刘涛 Department of Thermal engineering Tsinghua University Beijing 100084 China Department of Power engineering Beijing University of Astronautics and Aerospace Beijing 100083 China

An analytical investigation has been conducted to understand the internal fluid flow and heat transfer in the condenser with porous wick of an innovative capillary pumping loop (cpl) system. A mathematical model is proposed and used to describe the flow and heat transfer, especially interfacial transport phenomena. The liquid-vapor interface of the condensed liquid film was numerically determined. Some factors, such as vapor pressure, wall subcooling, wall heat load and thermofluid properties, have significant influence on the heat transfer process and the shape of liquid-vapor interface. Meanwhile, an experimental facility was setup and an experimental investigation was completed. Theoretical prediction and experimental results show quite good consistence.

关键词： cpl, interfacial phenomena, condensation, interfacial aspect, liquid film, heat transfer.