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Evolution of hollow nanosphere to microtube in the self-assembly of chiral dansyl derivatives and inversed circularly polarized luminescence

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Chinese Chemical Letters 2024年第7期35卷 285-290页

作者： Sifan Du Yuan Wang Fulin Wang Tianyu Wang Li Zhang Minghua Liu Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of Chemistry and Chemical EngineeringSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China National Laboratory for Molecular Science(BNLMS) CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

Here,we designed asymmetric(m DS)and symmetrical(d DS)chiral V-shaped molecules by linking one or two dansyl groups to trans-1,2-cyclohexane diamine and investigated the solvent-regulated structural transformation and inversed circularly polarized luminescence(cpl)in the *** increasing water volume fraction(fw)in the mixed solvent of water/acetonitrile,asymmetric mDS selfassembled into hollow nanospheres and microtubes,while solid nanospheres and solid microplates were corresponding to symmetric d *** this transformation process,the emission of m DS and d DS was changed from yellow-green to blue and cyan color,which was ascribed to twisted intramolecular charge transfer(TICT)and locally excited(LE)fluorescence of V-shaped DS *** conformation of N,Ndimethyl groups with respect to naphthalene ring also led to the transformation of *** tubular and platelike structures had stronger and reversed cpl signals in comparison with spheroidal *** chiral information of DS assembly could be effective transferred to achiral Nile red via co-assembly strategy,which endowed Nile red exhibiting inversed induced cpl signal regulated by water *** work provides a method for achieving a variety of self-assembled structures with adjustable chiroptical properties.

关键词： cpl inversion Hollow structure Self-assembly Dansyl Chirality transfer

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Induced circularly polarized luminescence of perovskite nanocrystals by self-assembly chiral gel

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Nano Research 2023年第1期16卷 1459-1464页

作者： Rui Cao Xuekang Yang Yong Wang Yin Xiao School of Science Tianjin UniversityTianjin 300350China School of Chemical engineering and Technology Tianjin UniversityTianjin 300350China National Center for Nanoscience and Technology Beijing 100190China

Perovskites nanocrystals(NCs)with circularly polarized light(cpl)activity have drawn much attention due to the fascinating photoelectric properties of perovskite NCs as well as the abundant applications of cpl in three-dimensional(3D)displays,nonlinear optics,spintronics devices,cpl lasers,and so ***,bio-inspired by life,we designed and synthesized a simple amphiphilic molecule which could self-assemble into chiral gel with helix chirality in non-polar *** co-assembly of the CsPbX3 NCs with the chiral gel,cpl at the first excitation band of CsPbX3 NCs is induced in the whole visible spectrum with a maximum glum of 8.2×10−*** induced cpl arises from the selective cpl-absorption of the CsPbX3 NCs’luminesce by the chiral gel,which provides a facile and practical approach to induce cpl in perovskite NCs and other nanocrystals.

关键词： circularly polarized light(cpl) chiral gel CsPbX3 perovskite nanocrystal selective cpl-absorption

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Enhanced circularly polarized luminescence emission promoted by achiral dichroic oligomers of F8BT in cholesteric liquid crystal

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Chinese Chemical Letters 2024年第11期35卷 470-474页

作者： Yang Li Yihan Chen Jiaxin Luo Qihuan Li Yiwu Quan Yixiang Cheng State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Wenzhou Institute University of Chinese Academy of SciencesWenzhou 325001China

In the exploration of circularly polarized luminescence(cpl)materials,doping cholesteric liquid crystals(CLCs)with achiral dyes is a common *** polymers are favored as achiral dyes for their superior luminescent *** this study,a series of oligomers(M1-M3)and the conjugated polymer F8BT were synthesized to systematically assess the impact of the length of the conjugated backbone on cpl signals of CLCs doped with conjugated *** the length rose from M1 to M3,cpl intensity concurrently increased(|g_(lum)|increased from 0.35 to 0.84),attributable to enhanced dichroism(order parameter,SFincreased from 0.20 to 0.56).In contrast,F8BT polymer resulted in diminished cpl intensity(|g_(lum)|=0.64)due to the reduced *** a balance between dichroism and compatibility is crucial for optimizing cpl in conjugated polymer-doped *** guiding principle established here may have broad applicability in other cpl assemblies,offering a strategic avenue to engineer highperformance cpl materials with conjugated polymer.

关键词： Circularly polarized luminescence Cholesteric liquid crystal F8BT Dichroism Compatibility

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Multistate circularly polarized luminescence switches based on dual stimuli-responsive chiral[2]rotaxanes

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Science China Chemistry 2024年第12期67卷 4202-4211页

作者： Wei-Tao Xu Xue Li Xiao-Qin Xu Xu-Qing Wang Hai-Bo Yang Wei Wang Wuhu Hospital East China Normal University(The Second People’s HospitalWuhu)Wuhu 241001China Shanghai Key Laboratory of Green Chemistry and Chemical Processes State Key Laboratory of Petroleum Molecular and Process EngineeringSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China Shanghai Center of Brain-inspired Intelligent Materials and Devices East China Normal UniversityShanghai 200241China

Aiming at the construction of novel multistate circularly polarized luminescence(cpl)switches,dual stimuli-responsive chiral[2]rotaxanes towards anions and light have been designed and *** the light-controlled on/off F?rster resonance energy transfer(FRET)switching between the emissive stoppers and anion-induced controllable motions of the chiral wheel for the precise regulations of chirality information transfer from the chiral wheel to the emissive stoppers,precisely switching between four cpl emission states with varied emission wavelengths and dissymmetry factors has been successfully realized,making them a promising platform for practical uses such as information storage and *** proof-of-concept study not only provides a novel design strategy for multistate cpl switching but also contributes excellent candidates for the construction of novel smart chiral luminescent materials.

关键词： mechanically interlocked molecules Förster resonance energy transfer aggregation-induced emission pillararene spiropyran

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Circularly polarized luminescence of lanthanide complexes:From isolated individuals,discrete oligomers,to hierarchical assemblies

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InfoMat 2023年第3期5卷 58-101页

作者： Yuan Zhong Zhennan Wu Yu Zhang Bin Dong Xue Bai State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchunthe People's Republic of China Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission Key Laboratory of Photosensitive Materials&Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Nationalities UniversityDalianthe People's Republic of China

Circularly polarized luminescence(cpl)is the emission featured spatial orientation equivalent to circular *** to the unique magnetic dipole-allowed but electric-dipole-forbidden 4f→4f transitions,chiral lanthanide complexes have been recognized as ideal candidates to achieve unprecedented luminescence dissymmetry factor(glum).Their inherent electric-dipole-forbidden transition can be partly allowed,through the rational design of coordination ligands to lower the surrounding symmetry,further endowing them with relatively high quantum yields(QYs).Moreover,the blossom of supramolecular chemistry in lanthanide complexes allows for the construction of discrete oligomers and hierarchical assemblies,rendering them with enhanced chiroptical ***,we deploy this review by summarizing recent advances in the chiroptical properties of lanthanide complexes,spanning multiple scales from isolated mononuclear individuals,discrete polynuclear oligomers,to infinite hierarchical *** first introduce the basic concept and several important parameters for the assessment of cpl ***,isolated mononuclear lanthanide complexes coordinated with different types of antennas,along with the unique chirality transfer and induction in achiral lanthanide complexes were ***,the systematical discussion on chiroptical properties in discrete polynuclear lanthanide oligomers and infinite hierarchical lanthanide assemblies was ***,the state-of-the-art applications of cpl-active lanthanide complexes were *** end up this review with the conclusion and prospects,involving the rational design of ligands,directed and hierarchically precise self-assembly,and extending applications of chiral lanthanide complexes.

关键词： circularly polarized luminescence chiroptical property lanthanide complexes self-assembly

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Chiral thermally activated delayed fluorescence materials for circularly polarized organic light-emitting diodes

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Science China Chemistry 2024年第4期67卷 1097-1116页

作者： Li Yuan Yi-Pin Zhang You-Xuan Zheng State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced MicrostructuresJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Chirality is an important natural characteristic of organic molecules,and chiral organic molecules have shown extensive application in areas such as pharmaceutical development and material *** from the ability to achieve circularly polarized luminescence(cpl),chiral luminescent materials have shown potential applications in anti-glare display,optical communication and,3D display,*** to the ability to harvest both singlet and triplet excitons by a fast reverse intersystem crossing process without involving noble metals,chiral thermally activated delayed fluorescence(TADF)materials with point chirality,axial chirality,planar chirality and helical chirality are regarded as the state-of-the-art materials for circularly polarized organic light-emitting diodes(CP-OLEDs).In recent years,the chiral TADF materials and CP-OLEDs have rapidly developed,but unfortunately,the dissymmetry factors(g)are far from the requirement of practical *** ideal emitters and devices should have both high efficiency and a g factor,or at least a balance between these two *** review gives an overview of recent progress in chiral TADF materials,with a particular focus on the chiral skeleton,cpl property and device ***,the molecular design concept,device structure and methods to improve the g factors of chiral materials and CP-OLEDs are also discussed.

关键词： chiral thermally activated delayed fluorescence material chiral skeleton circularly polarized luminescence circularly polarized organic light-emitting diodes dissymmetry factor

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Regulation and application of supramolecular gel with circularly polarized luminescence

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Science China Chemistry 2024年第6期67卷 1865-1880页

作者： Shen Song Yulong Shi Liangliang Zhu Bingbing Yue School of Materials and Chemistry&Institute of Bismuth and Rhenium University of Shanghai for Science and TechnologyShanghai200093China State Key Laboratory of Molecular engineering of Polymers Fudan UniversityShanghai200438China

Supermolecular gel is a three-dimensional network structure assembled by small molecules or polymers in solvents through noncovalent *** emergence of system complexity occurs spontaneously during the molecular self-assembly process.A multitude of chiral molecular self-assembly systems have been engineered,facilitating the achievement of circularly polarized luminescence(cpl)through the amalgamation of chiral entities with *** bonding,π-πstacking,and noncovalent forces,such as host-guest interactions and Van der Waals'forces,confer upon supramolecular gels the capacity to react to diverse *** to the flexibility of supramolecular assembly,the cpl properties of supramolecular gels have rich controllability and can be used in various *** this review,we summarized the examples of cpl-active supramolecular gel assembly,and further summarized the assembly environment factors and external ***,the versatility of cpl applications in supramolecular gels is demonstrated,ranging from optical devices,information encryption,biosensing and chemical sensing,and other practical *** conclusion,the study provides insights into the multicultural factors influencing cpl in supramolecular gels,describes their applications in various domains,and presents future perspectives in the field.

关键词： supramolecular gels circularly polarized luminescence self-assembly chirality stimuli-response

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Dielectric study on membrane adsorption and release: Relaxation mechanism and diffusion dynamics

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Science China Chemistry 2008年第9期51卷 813-822页

作者： LI YuHong ZHAO KongShuang HAN Ying Jiangsu Laboratory of Advanced Functional Materials Department of Chemistry and Material EngineeringChangshu Institute of TechnologyChangshu 215500China College of Chemistry Beijing Normal UniversityBeijing 100875China

Dielectric monitoring of the adsorption or release process of salicylic acid (SA) by chitosan membrane shows that the dielectric spectra of the chitosan membrane/ SA solution systems change regularly in the adsorption or release process. By analyzing the regularity, a new mechanism for the relaxations is proposed. The concentration polarization layer (cpl) caused by SA adsorption or release is confirmed to be essential for the dielectric relaxations. The changes of the spectra with time are explained by account of the relationship between cpl properties and dielectric strength. Based on this relaxation mechanism, a theoretical method can be established to calculate dynamical parameters of inner structure of the adsorption or release systems from their dielectric spectra. Therefore, dielectric spec- troscopy is demonstrated to be a promising method for estimating interfacial distribution of ionic sub- stances and their binding to membrane in a non-invasive way.

关键词： dielectric spectroscopy concentration polarization simulation chitosan adsorption release

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Lifetime-tunable circularly polarized luminescent system based on triplet-to-singlet Förster resonance energy transfer

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Science China Chemistry 2024年第9期67卷 2918-2922页

作者： Zhenyi He Zizhao Huang Xiang Ma Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Circularly polarized luminescence(cpl)materials have received widespread attention due to their remarkable performance and broad ***,current cpl material research primarily focuses on tunable color,intensity,and *** cpl with adjustable lifetime remains a significant ***,a series of cpl polymeric materials with tunable lifetime were obtained by employing phosphorescent terephthalic acid and chiral organic small molecule R/S-BNAF(a luminescent binaphthol derivative)to copolymerize with acrylamide in different *** was verified that this performance results from the different energy transfer efficiency between luminophores with varying ratios of the monomers for *** strategy to realize cpl with tunable lifetime by modulating the energy transfer efficiency will provide a new perspective to broaden the applications of cpl materials.

关键词： circularly polarized luminescence tunable lifetime Förster resonance energy transfer room temperature phosphorescence

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When quantum dots meet blue phase liquid crystal elastomers:visualized full-color and mechanically-switchable circularly polarized luminescence

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Light(Science & Applications) 2024年第6期13卷 1210-1220页

作者： Shan Li Yuqi Tang Qingyan Fan Ziyuan Li Xinfang Zhang Jingxia Wang Jinbao Guo Quan Li Key Laboratory of Carbon Fibers and Functional Polymers Ministry of Educationand College of Materials Science and EngineeringBeijing University of Chemical Technology100029BeijingChina Institute of Advanced Materials and School of Chemistry and Chemical engineering Southeast UniversityNanjing211189China Materials Science Graduate Program Kent State UniversityKentOH44242USA CAS Key Laboratory of Bio-Inspired Materials and Interfacial Sciences Technical Institute of Physics and ChemistryChinese Academy of Sciences100190BeijingChina

Polymer-based circularly polarized luminescence(cpl)materials with the advantage of diversified structure,easy fabrication,high thermal stability,and tunable properties have garnered considerable ***,adequate and precise tuning over cpl in polymer-based materials remains challenging due to the difficulty in regulating chiral ***,visualized full-color cpl is achieved by doping red,green,and blue quantum dots(QDs)into reconfigurable blue phase liquid crystal elastomers(BPLCEs).In contrast to the cpl signal observed in cholesteric liquid crystal elastomers(CLCEs),the chiral 3D cubic superstructure of BPLCEs induces an opposite cpl ***,this effect is entirely independent of photonic bandgaps(PBGs)and results in a high glum value,even without matching between PBGs and the emission bands of ***,the lattice structure of the BPLCEs can be reversibly switched via mechanical stretching force,inducing on-off switching of the cpl signals,and these variations can be further fixed using dynamic disulfide bonds in the ***,the smart polymer-based cpl systems using the BPLCEs for anti-counterfeiting and information encryption have been demonstrated,suggesting the great potential of the BPLCEs-based cpl active materials.

关键词： circular quantum crystal

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