Article
Chemistry, Multidisciplinary
Robin Ammenhaeuser, Patrick Klein, Eva Schmid, Sabrina Streicher, Jan Vogelsang, Christian W. Lehmann, John M. Lupton, Stefan C. J. Meskers, Ullrich Scherf
Summary: This article reports the synthesis of helical polymers with a rigid square structure based on spiro-linked ladder-type pentaphenyl units. The variation of circular dichroism with increasing chain length provides direct evidence for delocalization of electronic excitations over at least 10 monomeric units. The change in the degree of circular polarization of the fluorescence across the vibronic side bands shows that vibrational motion can localize the excitation dynamically to almost one single unit.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Hua-Li Liu, Hua-Yang Ru, Meng-En Sun, Zhao-Yang Wang, Shuang-Quan Zang
Summary: This study explores the effects of achiral organic ligands on the chiroptical activity of chiral perovskites and presents a new method of mixed-cation structural engineering for developing chiral perovskites for optoelectronic applications.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Qinxuan Cao, Ruyi Song, Christopher C. S. Chan, Zhiyu Wang, Pui Ying Wong, Kam Sing Wong, Volker Blum, Haipeng Lu
Summary: Chiral perovskite nanocrystals with precise control of layer thickness and chiral surface ligands exhibit tunable circular dichroism (CD) and circularly polarized luminescence (CPL) responses. Chirality transfer is found to decrease in thicker nanocrystals, leading to decreased CD and CPL dissymmetry factors. Large-scale first-principles calculations suggest that chirality transfer is mediated through surface distortion rather than electronic state hybridization, resulting in symmetry breaking and spin-split conduction bands.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Lorenzo Arrico, Costanza Benetti, Lorenzo Di Bari
Summary: This study presents a facile synthesis of Tb-III and Eu-III adducts capable of inducing circularly polarized luminescence. The use of commercially available enantiopure PyBox ligands allows for fine-tuning of the chemical structure, promising the development of a wide range of new and simple circularly polarized luminescence (CPL) active Ln(III) adducts.
Review
Chemistry, Multidisciplinary
Yiping Liu, Pengyao Xing
Summary: This review systematically summarizes and discusses the application-guided design strategies of circularly polarized light (CPL)-responsive materials. CPL illumination enables the direct synthesis of helical polymers and chiral inorganic nanostructures, and their intramolecular folding and self-assembly are modulated by light. In the aggregated state and liquid crystal phase, the helical sense of molecular packing is sensitive to the enantiomeric bias brought by CPL, achieving chiral amplification. Furthermore, applications of CPL detection and biomedical applications are discussed.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jin-Tai Lin, Deng-Gao Chen, Lan-Sheng Yang, Tai-Chun Lin, Yi-Hung Liu, Yu-Chiang Chao, Pi-Tai Chou, Ching-Wen Chiu
Summary: This study investigates the effects of various halogen-substituted chiral organic cations on the chiroptical properties of hybrid organic-inorganic perovskites (HOIPs). It was found that the HOIP with a chlorine-substituted chiral cation exhibits the highest circular dichroism (CD) and circular polarized luminescence (CPL) intensities, which can be correlated to the modulation of magnetic transition dipole and halogen-halogen interaction between organic cations and inorganic sheets.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Li Wen, Yifan Xie, Peng Yang, Hongli Zhang, Jiahe Li, Zeyu Feng, Gang Zou
Summary: A novel heterogeneous twisted-stacking structure is proposed to enhance the circularly polarized luminescence (CPL) properties of chiroptical materials. The CPL performance and figure of merit values can be precisely manipulated or inversed by uniaxial stretching, and the in situ voltage-driven switching and patterning of the CPL signal can be achieved with low operation voltage and good cycling stability.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Austin Hubley, Amina Bensalah-Ledoux, Bruno Baguenard, Stephan Guy, Benjamin Abecassis, Benoit Mahler
Summary: Chiral halide perovskite nanocrystals have applications in next-generation optoelectronic devices due to their interaction with polarized light. Control over the circular dichroism (CD) and circularly polarized luminescence (CPL) can be achieved through careful selection of chiral organic surface ligands. In this study, colloidal perovskite nanoplatelets were synthesized to exhibit room temperature CPL, and the precise ratio of chiral and achiral ligands was shown to be critical for high CPL intensity. The competitive binding of these ligands was investigated using H-1 NMR, and a linear correlation between CPL and CD was demonstrated. Additionally, the impact of subtle differences in ligand structure on the resulting nanoplatelets CD signal was explored.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Markus Gross, Fangyuan Zhang, Mona E. Arnold, Prince Ravat, Alexander J. C. Kuehne
Summary: The synthesis and characterization of configurationally stable chiral aza[7]helicene-functionalized trityl radicals are reported. The use of Pd-catalyzed C-N cross-coupling allows for the retention of open-shell character, leading to quantitative yield of the radical and bright photoluminescence emission.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Organic
Francesco Zinna, Gennaro Pescitelli
Summary: A recent discovery shows that achiral purely organic molecules can exhibit selectivity towards circularly polarized light in the presence of a magnetic field, a phenomenon known as magnetic circularly polarized luminescence (MCPL). Several examples of MCPL from organic molecules have been reported, which provide interesting photophysical information and potential technological applications. This short review aims to provide a general introduction to this emerging field of research and discuss the reported examples.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Chenlu Xue, Lifei Xu, Han-Xiao Wang, Tiesheng Li, Minghua Liu
Summary: A pair of chiral molecules, S,S/R,R-CHPA, were designed and investigated for their ability to generate circularly polarized luminescence (CPL). The optical properties of CHPA could be regulated by UV light, and under 365 nm irradiation, the molecule exhibited spectral changes and chirality inversion.
Article
Chemistry, Multidisciplinary
Jessica Wade, Jochen R. Brandt, David Reger, Francesco Zinna, Konstantin Y. Amsharov, Norbert Jux, David L. Andrews, Matthew J. Fuchter
Summary: The study presents a method to achieve nearly 1000-fold chiroptical amplification by embedding a pi-extended superhelicene in an achiral conjugated polymer matrix. This approach significantly increases the chiroptical factor of the superhelicene in solid-state blend films, offering a simple and versatile way to enhance the g-factors of small organic molecules.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Chenchen Wang, Lin Liu, Jingyu Wang, Yong Yan
Summary: In this study, we found that the circularly polarized photoluminescence (CPL) of self-assembled conducting polyaniline (PANI) helical microfibers can be reversibly switched by applying an alternating electrical bias. The conducting polymer transfers its chirality to the coassembled aggregation-induced emission (AIE) fluorescent molecules, resulting in electrochemically switchable CPL. This is derived from the reversible transformation of the chirality of the polyaniline microfibers, possibly due to the change in the molecular interchain distance upon doping/dedoping. Double-layer information encryption based on the electrochemically reversible CPL and conductance has also been demonstrated.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Jiaqi Chen, Xinshuang Gao, Qiang Zheng, Jianbo Liu, Dejing Meng, Haiyun Li, Rui Cai, Huizhen Fan, Yinglu Ji, Xiaochun Wu
Summary: This study introduces a chemical strategy for synthesizing intrinsically helical plasmonic nanorods with strong and tailorable plasmonic circular dichroism responses, analyzing the influence of structural parameters on the responses. The depth of the pitch was found to have the greatest impact on the response, and these nanorods were found to induce circularly polarized luminescence of achiral luminophores. The chiral plasmonic nanostructure produced in this study has potential applications in chiral sensors, catalysis, and displays.
Article
Chemistry, Physical
Masahiro Ikeshita, Taichi Oka, Maho Kitahara, Yoshitane Imai, Takashi Tsuno
Summary: This article describes the syntheses, structures, and circularly polarized luminescence (CPL) properties of bis(boron difluoride) complexes with chiral Schiff-base ligands. A series of chiral Schiff-base bis(boron difluoride) complexes based on the naphthalene backbone were prepared and their molecular structures were identified. These complexes exhibited efficient photoluminescence in dilute solution and the circularly polarized luminescence properties were also investigated.
Article
Chemistry, Multidisciplinary
Qing Xia, Weiwei Xie, Tingchao He, Hongyan Zhang, Zujin Zhao, Guangxi Huang, Bing Shi Li, Ben Zhong Tang
Summary: This study demonstrates a versatile cholesterol-containing tetraphenylethene derivative that can provide rich anticounterfeiting effects through the synergistic use of multiple optical properties. This offers important insights for designing advanced multimodal anticounterfeiting technology.
Article
Nanoscience & Nanotechnology
Xijian Duan, Jingrui Ma, Wenda Zhang, Pai Liu, Haochen Liu, Junjie Hao, Kai Wang, Lars Samuelson, Xiao Wei Sun
Summary: HF processing was used to eliminate the InPOx defect in red InP quantum dots and improve the fluorescence efficiency. The record-breaking red InP quantum dots were synthesized with the assistance of tri(dimethylamino)phosphine [(DMA)3P], achieving a maximum photoluminescence quantum yield of 97.7%. The external quantum efficiency and brightness of the quantum dot light-emitting diode device were also improved accordingly.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Yaling Liang, Wei Chen, Yun Tang, Meijuan Chen
Summary: This study identified differentially expressed genes (DEGs) related to type 2 diabetes (T2D) and pancreatic cancer (PC) and explored their functional roles and pathways. The MAFB gene was found to be a potential biomarker for PC, and its expression was strongly correlated with chemokines, chemokine receptors, and immunomodulators. The expression of these key genes was confirmed in vitro.
BIOCHEMICAL GENETICS
(2023)
Article
Chemistry, Multidisciplinary
Can Ren, Die Hu, Yanyan Cui, Peixian Chen, Xiaoqian Xu, Jiaji Cheng, Tingchao He
Summary: Water-soluble Ag-doped InP/ZnS quantum dots with high photoluminescence quantum yield were synthesized and characterized. Their maximum two- and three-photon absorption cross sections were determined to be similar to 1.7 x 10(4) GM at 820 nm and similar to 1.7 x 10(-76) cm(6) s(2) photon(-2) at 1260 nm. Importantly, it was demonstrated for the first time that Ag-doped InP/ZnS QDs can be used for type-I photodynamic therapy and are more suitable for the hypoxic environment of tumors.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Peixian Chen, Huan Liu, Yanyan Cui, Cheng Liu, Yiwen Li, Yang Gao, Jiaji Cheng, Tingchao He
Summary: The optical properties of two types of InP-based quantum dots (QDs), InP/ZnS and InP/ZnSeS/ZnS, were comparatively investigated. The latter exhibited improved photoluminescence quantum yield and weaker defect state emission compared to the former. The introduction of the inner ZnSeS shell reduced the surface states of the InP core and formed a quasi-II electronic structure, which was beneficial for suppressing the blinking effect. In addition, InP/ZnSeS/ZnS QDs showed higher two- and three-photon brightness in the wavelength range from 700 to 1500 nm compared to InP/ZnS QDs. The study reveals the importance of the inner ZnSeS shell for optimizing the optical properties of InP-based QDs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Hongmei Zhu, Qingqian Wang, Kun Sun, Wei Chen, Jun Tang, Junjie Hao, Zhaojin Wang, Jiayun Sun, Wallace C. H. Choy, Peter Muller-Buschbaum, Xiao Wei Sun, Dan Wu, Kai Wang
Summary: The chirality of 2D chiral perovskite films has been significantly enhanced by a solvent modulation strategy, leading to the formation of CPL-active materials. By creating chiral perovskite/quantum dot composites, an increase in the CPL intensity was observed, attributed to the generation and transportation of spin-polarized charge carriers as well as the enlarged lattice distortion of the chiral perovskite films achieved through solvent modulation. This approach provides an effective way to construct CPL-active materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Xin Li, Xueyu Tang, Meijuan Chen, Peng Wang, Liang Liu, Junhua Zhang, Yimin Fan
Summary: An implantable and in-vivo shape-recoverable hydrogel based on hyaluronic acid (HA) has been developed for tissue filling. It is formed by hydrogen bonding between HA and TEMPO-oxidation cellulose nano-fiber, and has good shaping ability and biocompatibility.
CARBOHYDRATE POLYMERS
(2023)
Review
Chemistry, Multidisciplinary
Zhenyu Wang, Xianjin Shi, Meijuan Chen, Junji Cao, Wingkei Ho, Shuncheng Lee, Chuanyi Wang, Yu Huang
Summary: Air pollution caused by particulate matter and ozone in Chinese megacities is a major health concern, partially due to the emissions of nitrogen oxides. Therefore, advanced methods, such as photocalysis using polymeric carbon nitride, are needed for nitrogen oxide removal. However, this process is limited by low visible-light absorption, specific surface area, carrier recombination, and conversion pathways. In this review, catalysts made of polymeric carbon nitride for the removal of nitrogen oxides are discussed, focusing on improving light absorption, increasing surface area, inhibiting carrier recombination, regulating the reaction process, outdoor applications, and reducing nitrogen oxides to dinitrogen.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Physics, Condensed Matter
Yuri D. Glinka, Tingchao He, Xiao Wei Sun
Summary: Separate relaxation dynamics of long-lived holes in Bi2Se3 film were observed at room temperature using transient absorption spectroscopy. The ultraslow dynamics and long rise time are attributed to the resonance conditions for multiphoton photoemission and the intervalley scattering in the film. The dynamics of massive Dirac fermions predominantly determines the relaxation of photoexcited carriers.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Agricultural Engineering
Mengyue Shi, Yue Ma, Yanlei Hu, Xin Luo, Liang Liu, Juan Yu, Meijuan Chen, Yimin Fan
Summary: Silk nanofibers were dispersed in a NaOH/urea system at room temperature, while cellulose was dissolved in a NaOH/urea system through freezing-thawing treatment. The composite hydrogels prepared by mixing and standing exhibited enhanced mechanical properties and changed micromorphologies and synthesized CuO nanoparticles compared to the cellulose hydrogel. The composite hydrogels with CuO nanoparticles showed potential photocatalytic activity for the degradation of methylene blue dye, with a significantly higher degradation rate compared to the cellulose/CuO composite hydrogel. The results demonstrated the regulation of cellulose hydrogel micromorphology and performance by silk nanofibers.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Zhihang Guo, Junzi Li, Rulin Liu, Yang Yang, Changshun Wang, Xi Zhu, Tingchao He
Summary: Understanding the chiral mechanism in chiral hybrid perovskites is crucial for the development of chiroptoelectronic applications. By employing a spacer cation alloying strategy, we demonstrate second-harmonic-generation circular dichroism (CD) microarea imaging in chiral perovskite thin films, revealing their spatially correlated chirality. Our findings, combined with theoretical calculations, suggest that the spatially correlated chirality arises from localized out-of-plane supramolecular orientations.
Article
Materials Science, Multidisciplinary
Fenghuan Zhao, Qingguo Bai, Chenghui Xia, Junjie Hao, Marion Gayot, Jean-Pierre Delville, Marie-Helene Delville
Summary: We propose a method for synthesizing well-controlled core-shell nanoheterodimers (NHDs) based on single bimetallic Au@M (M = Au, Ag, Pd, Pt) nanodots (BNDs) grown on TiO2 nanoparticles (NPs). The process involves a two-step laser-assisted deposition. The first step uses a focused UV laser to nucleate and grow a single core nanodot (ND) with quantitatively controlled size. In the second step, a new metal precursor is added to the Au-TiO2 NHDs and a second laser deposition takes place on the first gold NDs. The synthesized NHDs exhibit different growth patterns depending on the metals involved.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Jiaying Lin, Rulin Liu, Peixian Chen, Yangfei Lv, Junjie Hao, Meijuan Chen, Dongxiang Zhang, Ruikun Pan, Yiwen Li, Xi Zhu, Tingchao He, Jiaji Cheng
Summary: Stimulating and harnessing circularly polarized luminescence (CPL) is crucial for understanding chirogenesis in physical chemistry and implementing it in research fields such as chiral optoelectronics and theranostics. In this study, red-emissive carbonized polymer dots (CPDs) with enhanced circular dichroism (CD) and CPL activities were synthesized using a biomolecule-tailored organic-inorganic co-assembly strategy. The obtained CPL signals can be manipulated in an excitation-dependent manner, indicating a synergistic-competition phenomenon between configurational chirality and intermolecular energy-transfer dynamics.
Article
Optics
Fuli Zhao, Yanyan Cui, Anfu Wang, Yang Gao, Tingchao He
Summary: This work reports the optical properties of inverted type-I ZnSe/InP/ZnS quantum dots (QDs) with photoluminescence (PL) emission in the near-infrared (NIR) range. The QDs exhibit higher exciton-binding energy and weaker carrier-phonon coupling effect than conventional type-I InP-based QDs. In addition, they show strong two-photon absorption characteristics in the second biological window.
JOURNAL OF LUMINESCENCE
(2024)
