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Exciton polaritons based on planar dielectric Si asymmetric nanogratings coupled with J-aggregated dyes film

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Frontiers of Optoelectronics 2020年第1期13卷 4-11页

作者： Zhen CHAI Xiaoyong HU Qihuang GONG State Key Laboratory for Mesoscopic Physics&Department of Physics Collaborative Innovation Center of Quantum MatterBeijing Academy of Quantum Information SciencesNano-optoelectronics Frontier Center of Ministry of EducationPeking UniversityBeijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Optical cavity polaritons,originated from strong coupling between the excitons in materials and photons in the confined cavities field,have recently emerged as their applications in the high-speed lowpower polaritons devices,low-threshold lasing and so on.However,the traditional exciton polaritons based on metal plasmonic structures or Fabry-Perot cavities suffer from the disadvantages of large intrinsic losses or hard to integrate and nanofabricate.This greatly limits the applications of exciton poalritons.Thus,here we implement a compact low-loss dielectric photonic–organic nanostructure by placing a 2-nm-thick PVA doped with TDBC film on top of a planar Si asymmetric nanogratings to reveal the exciton polaritons modes.We find a distinct anti-crossing dispersion behavior appears with a 117.16 meV Rabi splitting when varying the period of Si nanogratings.Polaritons dispersion and mode anti-crossing behaviors are also observed when considering the independence of the height of Si,width of Si nanowire B,and distance between the two Si nanowires in one period.This work offers an opportunity to realize low-loss novel polaritons applications.

关键词： exciton polaritons dielectric Si asymmetric nanogratings TDBC J-aggregated dyes film

Environmental application of three-dimensional graphene materials as adsorbents for dyes and heavy metals: Review on ice-templating method and adsorption mechanisms

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Journal of Environmental Sciences 2019年第5期31卷 174-199页

作者： Kar Chiew Lai Lai Yee Lee Billie Yan Zhang Hiew Suchithra Thangalazhy-Gopakumar Suyin Gan Department of Chemical and Environmental Engineering University of Nottingham Malaysia Campus

The remediation of wastewater requires treatment technologies which are robust, efficient,simple to operate and affordable such as adsorption. Lately, three-dimensional(3D)graphene based materials have attracted significant attention as effective adsorbents for wastewater treatment. The intrinsic properties of 3D graphene structure such as large surface area and interconnected porous structure can facilitate the transport of pollutants into the 3D network and provide abundant active sites for trapping the pollutants. For the synthesis of 3D graphene structure, ice-templating is commonly practiced due to its facile steps, cost effectiveness and high scalability potential. This review covers the icetemplating fabrication technique for 3D graphene based materials and their application as adsorbents in eliminating dyes and heavy metals from aqueous media. The assembly mechanisms of the ice-templating fsynthesis are comprehensively discussed. Further discussion on the fundamental principles, critical process parameters and characteristics of ice-templated 3D graphene structures is also included. A thorough review on the mechanisms for batch adsorption of dyes and heavy metals is presented based on the structures and properties of the 3D graphene materials. The review further evaluates the dynamic adsorption in packed columns and the regeneration of 3D graphene based materials.

关键词： Ice-templating 3D graphene based structure Adsorption mechanism dyes Heavy metals

Molecular Engineering of Novel Fluorophores for High-Contrast Bioimaging

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Chinese Journal of Chemistry 2022年第9期40卷 1073-1082页

作者： Shuai Xu Wenjing Pan Tian-Bing Ren Shuang-Yan Huan Lin Yuan Xiao-Bing Zhang Molecular Science and Biomedicine Laboratory State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringCollaborative Innovation Center for Chemistry and Molecular MedicineHunan UniversityChangshaHunan 410082China

Fluorophores play a significant role in achieving high-contrast imaging in complex physiological environment.Herein,we present the results of our studies on the development of various fluorophores,such as anti-solvatochromic fluorophores,long wavelength emission two-photon fluorophores,large Stokes shift fluorophores and solid-state fluorophores,to achieve high-contrast bioimaging in physiological environments.in this study,we have primarily focused on the design,optical performance,imaging mechanisms,and the applications of these fluorophores with respect to complex physiological conditions.

关键词： Fluorescent probes dyes Sensors Bioimaging Molecular engineering

Malachite Green Adsorption Using Carbon-Based and Non-Conventional Adsorbent Made from Biowaste and Biomass:A Review

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Journal of Renewable Materials 2023年第11期11卷 3789-3806页

作者： Annisa Ardiyanti Suprapto Suprapto Yatim Lailun Ni’mah Department of Chemistry Faculty of Sciences and Data AnalyticsInstitut Teknologi Sepuluh NopemberKampus ITS-SukoliloSurabaya60111Indonesia

dyes are pervasive contaminants in wastewater,posing significant health risks to both humans and animals.Among the various methods employed for effective dye removal,adsorption has emerged as a highly promising approach due to its notable advantages,including high efficiency,cost-effectiveness,low energy consumption,and operational simplicity compared to alternative treatments.This comprehensive review focuses on investigating adsorbents derived from biowastes and biomass,specifically carbon-based and non-conventional adsorbents,for the removal of malachite green,a widely used dye known for its toxic and carcinogenic properties.Carbon-based adsorbents encompass two main types:activated carbon and biochar,while non-conventional adsorbents refer to powder sorbents without carbonaceous treatments.Extensive studies have reported remarkable findings,with achieved maximum removal percentages exceeding 98%and capacities reaching 250 mg/g.These results highlight the exceptional efficacy of the reviewed adsorbents in eliminating malachite green from wastewater.By exploring the potential of bio-based adsorbents,this review sheds light on sustainable and environmentally friendly solutions for mitigating dye pollution.

关键词： Adsorption carbon dyes malachite green wastewater

Ultrafast synthesis of gold nanoparticles on cellulose nanocrystals via microwave irradiation and their dyes-degradation catalytic activity

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Journal of Materials Science & Technology 2020年第6期41卷 168-177页

作者： Madhusudhan Alle Seung-Hwan Lee Jin-Chul Kim Institute of Forest Science Kangwon National UniversityChuncheon 24341Republic of Korea Department of Forest Biomaterials Engineering Kangwon National UniversityChuncheon 24341Republic of Korea Department of Medical Biomaterials Engineering College of Biomedical Science and Institute of Bioscience and BiotechnologyKangwon National University192-1Hyoja 2 dongChuncheonKangwon-do 200-701Republic of Korea

This study represents a well-dispersed gold nanoparticles(AuNPs)synthesis process via cellulose nanocrystals(CNC)which acts as both reducing and supporting agent.The synthesis process was ultrafast and completed in a few seconds using microwave irradiation.The entire synthesis process was cost-effective,sustainable and eco-friendly.The synthesized(AuNPs/CNC)nanocomposite was investigated by transmission electron microscopy,selected area electron diffraction,Fourier transform infrared spectroscopy,energy dispersive X-ray analysis,X-ray diffraction,and UV–vis spectroscopy.The obtained AuNPs were well accumulated on the CNC surface and had a uniform spherical shape with an average diameter of 8±5.3 nm.The diameter of AuNPs could be altered by tuning the concentration of CNC suspension.The synthesized AuNPs/CNC nanocomposite film exhibited excellent degradation properties against various organic dyes,namely,Allura red,Congo red,Rhodamine B and Amaranth.The ultrafast degradation reactions followed pseudo first order kinetics.In the catalytic degradation reaction,AuNPs/CNC was transmitting electrons from a donor(NaBH4)to an acceptor(a dye).

关键词： Cellulose nanocrystals Gold nanoparticles Microwave synthesis Catalytic degradation of dyes

MnCeOx/diatomite catalyst for persulfate activation to degrade organic pollutants

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Journal of Environmental Sciences 2020年第3期32卷 206-217页

作者： Lijun Niu Guang Xian Zeqing Long Guangming Zhang Ningyu Zhou School of Environment and Natural Resource Renmin University of ChinaBeijing 100872China Department of Military Installations Army Lorange Gistics University of PLAChongqing 401311China

Persulfate(PS)-based oxidation technologies are attracting increasing attentions in water treatment due to their high efficiency and stability.In this study,a novel diatomite supported MnCeOx composite(MnCeOx/diatomite) was prepared and characterized for activation of PS to degrade organic pollutants.Results indicated that diatomite not only dispersed MnCeOx and increased the specific surface area of catalyst,but also improved the low-valence metal site(Mn^2+and Ce^3+) and reactive oxygen species site(-OH) of MnCeOx,thus enhancing the activities of MnCeOx.MnCeOx/diatomite/PS showed high efficiency for multiple dyes and pharmaceutical pollutants.Constant rate(k) of MnCeOx/diatomite(kMnCeOx/diatomite) was three times higher than the sum of constant rate of MnCeOx(kMnCeOx)and constant rate of diatomite(kdiatomite).In addition,MnCeOx/diatomite showed wide pH application(5-9).Cl^- and NO3^2- had no effect while SO4^2- and humid acid had slightly negative effects on MnCeOx/diatomite/PS system.Moreover,MnCeOx/diatomite showed good reusability and stability.Mechanism analyses indicated that electron transfer of Mn and Ce attributed to the activation of PS and oxygen to produce free radicals.SO4·^-,·OH and O2·^-on the surface of catalyst were the main active free radicals to attack pollutants.

关键词： MnCeOx/diatomite Persulfate dyes and pharmaceutical pollutants Hydroxyl functional group

Toward the most versatile fluorophore: Direct functionalization of BODIPY dyes via regioselective C–H bond activation

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Chinese Chemical Letters 2019年第10期30卷 1825-1833页

作者： Wanle Sheng Fan Lv Bing Tang Erhong Hao Lijuan Jiao The Key Laboratory of Functional Molecular Solids Ministry of EducationSchool of Chemistry and Materials ScienceAnhui Normal UniversityWuhu241002China Department of Chemistry Bengbu Medical CollegeBengbu 233030China

Fluorescent dyes are heavily sought for their potentials applications in bioimaging, sensing, theranostic,and optoelectronic materials. Among them, BODIPY dyes are privileged fluorophores that are now widely used in highly diverse research fields. The increasing success of BODIPY dyes is closely associated with their excellent and tunable photophysical properties due to their rich functionalization chemistry.Recently, growing research efforts have been devoted to the direct functionalization of the BODIPY core,because it allows the facile installation of desired functional groups in a single atom economical step. The challenges of this direct C-H derivation come from the difficulties in finding suitable functionalization agents and proper control of the regioselectivity of the functionalization. The aim of this work is to provide an overview of BODIPY dyes and a summarization of the different synthetic methodologies reported for direct C–H functionalization of the BODIPY framework.

关键词： dyes Pigments BODIPY C-H activation Radical substitution Oxidative nucleophilic substitution

Near-infrared small molecular fluorescent dyes for photothermal therapy

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Chinese Chemical Letters 2019年第7期30卷 1353-1360页

作者： Yisha Chen Li Li Weijie Chen Haiyan Chen Jun Yin Department of Biomedical Engineering School of Engineering State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing 210009 China Key Laboratory of Pesticide and Chemical Biology Ministry of Education Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis International Joint Research Center for Intelligent Biosensing Technology and Health College of Chemistry Central China Normal University Wuhan 430079 China

Near-infrared(NIR)fluorescent dyes based on small organic molecules are characterized with low cytotoxicity,good biocompatibility and minimum interference from auto-fluorescence background,which are widely used in tumor diagnosis.Intensive research on molecular properties and photothermal properties of fluorescent dyes have been explored for non-invasive photothermal treatment of cancer.In this review,we focus on the development of imaging-induced photothermal therapy of small molecules and classification according to the structures of organic molecules including cyanines,phthalocyanines,rhodamine analogues and BODIPYs.

关键词： Near-infrared fluorescent dyes Photothermal therapy Cyanine BODIPY Phthalocyanine

Photodynamic therapy based on organic small molecular fluorescent dyes

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Chinese Chemical Letters 2019年第10期30卷 1689-1703页

作者： Li Li Yisha Chen Weijie Chen Ying Tan Haiyan Chen Jun Yin Department of Biomedical Engineering School of EngineeringState Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityNanjing 210009China Key Laboratory of Pesticide and Chemical Biology Ministry of EducationHubei International Scientific and Technological Cooperation Base of Pesticide and Green SynthesisInternational Joint Research Center for Intelligent BiosensingTechnology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Biologythe Graduate School at ShenzhenTsinghua UniversityShenzhen 518055China

Photodynamic therapy(PDT) has shown promise as an effective treatment modality for cancer and other localized diseases due to its noninvasive properties and spatiotemporal selectivity. Near-infrared(NIR)fluorescent dyes based on organic small molecules are characterized with low cytotoxicity, good biocompatibility and excellent phototoxicity, which are widely used in PDT. In this review, we attempt to summarize the development of imaging-induced PDT based on organic small molecules and classify it according to the structures of dyes including cyanines, 4,4-difluoro-4-bora-3 a,4 a-diaza-s-indacene(BODIPY) analogues, phthalocyanine and other agents such as rhodamine analogues.

关键词： Near-infrared fluorescent dyes Photodynamic therapy Cyanine BODIPY Phthalocyanine