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Fluorescence Behavior and Emission Mechanisms of Poly(ethylene succinamide)and Its Applications in Fe^(3+)detection and Data Encryption

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高分子科学：英文版 2023年第1期41卷 129-142页

作者： Xubao Jiang Qinghui Wang Bin Li Shusheng Li Xiang Zheng Kong College of Chemistry and Chemical Engineering University of JinanJinan250022China Québec Center for Functional Materials Department of ChemistryUniversitéde SherbrookeSherbrookeQCJ1K2R1Canada

Conventional fluorescent polymers are featured by large conjugation *** contrast,a new class of fluorescent polymers without any conjugations is gaining great interest in immerging *** is a typical member of the conjugation-free fluorescent ***,studies on their electrophotonic property are hardly available,although widely used in many ***,poly(ethylene succinamide),PA24,is synthesized;its chemical structure confirmed through multiple techniques(NMR,FTIR,XRD,etc.).PA24 is highly emissive as solid and in its solution at room temperature,and the emission is excitation and concentration dependant,with an unusual blue shift under excitation from 270 nm to 320 nm,a hardly observed phenomenon for all fluorescent *** similar emission behavior is also observed under cryogenic condition at 77 *** emission behavior is thoroughly studied;the ephemeral emission blue-shift is interpreted through Förster resonance energy *** on its structures,the emission mechanism is ascribed to cluster-triggered emission,elucidated from multianalyses(NMR,FTIR,UV absorbance and DLS).In presence of a dozen of competitive metal ions,PA24 emission at 450 nm is selectively quenched by Fe^(3+).PA24 is used as probe for Fe^(3+)and H_(2)O_(2) detections and in data ***,this work provides a novel face of polyamide with great potential applications as sensors in different fields.

关键词： Polyamide Fluorescent emission Cluster formation ferric ion detection Data encryption

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Carbon Dots-Doped Electrospun Fibers for Simultaneous Metal ion detection and Adsorption of Dyes

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Advanced Fiber Materials 2020年第6期2卷 302-313页

作者： Mário César A.de Oliveira Elisângela G.de L.Oliveira Indira C.B.Pires Iuri C.M.Candido Nikifor Rakov Helinando P.de Oliveira Yutao Xing Glauco S.Maciel Institute of Materials Science Universidade Federal do Vale do São FranciscoJuazeiroBA 48920-310Brazil Instituto de Física Universidade Federal FluminenseNiteróiRJ 24210-346Brazil

The required treatment and monitoring of contaminants in wastewater reinforces the development of low-cost adsorbents/chemosensors,introducing advantages relative to the detection/removal of toxic metals and ***,it is reported a two-step process of fabrication of fluorescent carbon dots via the hydrothermal treatment of amino acids for the following encapsulation in electrospun *** prominent anionic behavior of electrospun fibers of Eudragit L100 was explored for adsorption of cationic dyes(methylene blue and crystal violet)-with the prevailing electrostatic interaction of parts being favored by the formation of monolayers on the surface of *** the other hand,the controlled release of carbon dots(CDs)from fibers to the reactor can be explored for a second application:the nitrogen ligands from released glycine-based carbon dots can be explored to indicate the presence of metal ions in aqueous *** experiment resulted in a quenching in the fluorescence of the CDs in order of 90%in the emission of particles in the response of the presence of Fe^(3+) ions,characterizing a promising perspective for this experimental system.

关键词： Fluorescence ferric ion detection Electrospinning Carbon nanostructure

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One-pot synthesis of nuclear targeting carbon dots with high photoluminescence

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Chinese Chemical Letters 2021年第12期32卷 3911-3915页

作者： Pengchong Wang Hongrui Ji Shiyan Guo Ying Zhang Yan Yan Ke Wang Jianfeng Xing Yalin Dong Department of Pharmacy the First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061China School of Pharmacy Xi'an Jiaotong UniversityXi'an 710061China

Carbon dots(CDs) are novel fluorescent nanomaterials with good water solubility, high resistance to photobleaching and low toxicity. While, there are few studies elaborate on the relationship among reaction conditions, properties and applications of CDs. In this study, a series of CDs are synthesized through a one-pot hydrothermal method, and different reaction conditions are carried out to study the influencing factors of CDs properties. As a result, with the increase of temperature and reaction time, the particle size and zeta potential of CDs increased, the maximum emission wavelength red-shifted and the fluorescence quantum yield(QY) improved. Among them, CD3006 has good water solubility and highest QY of 81.4%, which is beneficial for its applications in bioimaging and ion detection. CD3006 is almost nontoxic in cells at a concentration of 500 μg/m L. In addition, the positive charged CD3006 shows nuclear targeting potential because of its combination with DNA through electrostatic interaction in nucleus. The properties of CDs can be greatly enhanced by controlling reaction conditions, and it provides great application prospects.

关键词： Optimization of synthesis process Fluorescence quantum yield improving Nuclear targeting Bioimaging ferric ion detection

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