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Kuznetsova V, Coogan Á, Botov D, Gromova Y, Ushakova EV, Gun'ko YK. Expanding the Horizons of Machine Learning in Nanomaterials to Chiral Nanostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2308912. [PMID: 38241607 PMCID: PMC11167410 DOI: 10.1002/adma.202308912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/10/2024] [Indexed: 01/21/2024]
Abstract
Machine learning holds significant research potential in the field of nanotechnology, enabling nanomaterial structure and property predictions, facilitating materials design and discovery, and reducing the need for time-consuming and labor-intensive experiments and simulations. In contrast to their achiral counterparts, the application of machine learning for chiral nanomaterials is still in its infancy, with a limited number of publications to date. This is despite the great potential of machine learning to advance the development of new sustainable chiral materials with high values of optical activity, circularly polarized luminescence, and enantioselectivity, as well as for the analysis of structural chirality by electron microscopy. In this review, an analysis of machine learning methods used for studying achiral nanomaterials is provided, subsequently offering guidance on adapting and extending this work to chiral nanomaterials. An overview of chiral nanomaterials within the framework of synthesis-structure-property-application relationships is presented and insights on how to leverage machine learning for the study of these highly complex relationships are provided. Some key recent publications are reviewed and discussed on the application of machine learning for chiral nanomaterials. Finally, the review captures the key achievements, ongoing challenges, and the prospective outlook for this very important research field.
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Affiliation(s)
- Vera Kuznetsova
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin, D02 PN40, Ireland
| | - Áine Coogan
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin, D02 PN40, Ireland
| | - Dmitry Botov
- Everypixel Media Innovation Group, 021 Fillmore St., PMB 15, San Francisco, CA, 94115, USA
- Neapolis University Pafos, 2 Danais Avenue, Pafos, 8042, Cyprus
| | - Yulia Gromova
- Department of Molecular and Cellular Biology, Harvard University, 52 Oxford St., Cambridge, MA, 02138, USA
| | - Elena V Ushakova
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong SAR, 999077, P. R. China
| | - Yurii K Gun'ko
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin, D02 PN40, Ireland
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2
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Dai Y, Zhang Z, Wang D, Li T, Ren Y, Chen J, Feng L. Machine-Learning-Driven G-Quartet-Based Circularly Polarized Luminescence Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2310455. [PMID: 37983564 DOI: 10.1002/adma.202310455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/12/2023] [Indexed: 11/22/2023]
Abstract
Circularly polarized luminescence (CPL) materials have garnered significant interest due to their potential applications in chiral functional devices. Synthesizing CPL materials with a high dissymmetry factor (glum ) remains a significant challenge. Inspired by efficient machine learning (ML) applications in scientific research, this work demonstrates ML-based techniques for the first time to guide the synthesis of G-quartet-based CPL gels with high glum values and multiple chiral regulation strategies. Employing an "experiment-prediction-verification" approach, this work devises a ML classification and regression model for the solvothermal synthesis of G-quartet gels in deep eutectic solvents. This process illustrates the relationship between various synthesis parameters and the glum value. The decision tree algorithm demonstrates superior performance across six ML models, with model accuracy and determination coefficients amounting to 0.97 and 0.96, respectively. The screened CPL gels exhibiting a glum value up to 0.15 are obtained through combined ML guidance and experimental verification, among the highest ones reported till now for biomolecule-based CPL systems. These findings indicate that ML can streamline the rational design of chiral nanomaterials, thereby expediting their further development.
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Affiliation(s)
- Yankai Dai
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Zhiwei Zhang
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Dong Wang
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Tianliang Li
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Yuze Ren
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Jingqi Chen
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Lingyan Feng
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
- Shanghai Engineering Research Center of Organ Repair, ShanghaiUniversity, Shanghai, 200444, China
- QianWeichang College, Shanghai University, Shanghai, 200444, China
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3
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Schwartz G, Hananel U, Markovich G. Circularly polarized and total luminescence as probes of nucleation and growth in chiral nanocrystals. Chirality 2023; 35:104-109. [PMID: 36477935 PMCID: PMC10108007 DOI: 10.1002/chir.23523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/28/2022] [Accepted: 11/29/2022] [Indexed: 12/13/2022]
Abstract
Nucleation of crystals as well as their growth is difficult to study experimentally. We have recently demonstrated that chiral Eu3+ -doped terbium phosphate nanocrystals are an interesting system for studying nanocrystal formation mechanisms and chiral symmetry breaking, occurring during their formation, directed by chiral ligands, such as tartaric acid. In this paper, we show how simultaneous, in situ monitoring of both total emission intensity and circularly polarized luminescence magnitude and sign versus time during nanocrystal formation provides considerable information on the mechanisms of nanocrystal nucleation and growth. Specifically, we show that the presence of tartaric acid leads to the formation of chiral prenucleation clusters, which deterministically transform into nanocrystals of a specific handedness. Additionally, we demonstrate that both unseeded and seeded nanocrystal syntheses behave differently mechanistically and that the addition of seed nanocrystals catalyses both enantio-specific (also called secondary nucleation) as well as nonspecific nucleation.
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Affiliation(s)
- Gal Schwartz
- School of ChemistryTel Aviv UniversityTel AvivIsrael
| | - Uri Hananel
- School of ChemistryTel Aviv UniversityTel AvivIsrael
| | - Gil Markovich
- School of ChemistryTel Aviv UniversityTel AvivIsrael
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4
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Li P, Guo Y, Liu A, Yue X, Yuan T, Zhu J, Zhang Y, Li F. Deterministic Relation between Optical Polarization and Lattice Symmetry Revealed in Ion-Doped Single Microcrystals. ACS NANO 2022; 16:9535-9545. [PMID: 35579446 DOI: 10.1021/acsnano.2c02756] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Rare-earth ion doped crystals are of great significance for microsensing and quantum information, while the ions in the crystals emit light with spontaneous partial polarization, which is, though believed to be originated from the crystal lattice structure, still lacking a deterministic explanation that can be tested with quantitative accuracy. We report experimental evidence showing the profound physical relation between the polarization degree of light emitted by the doped ion and the lattice symmetry by demonstrating, with high precision, that the lattice constant ratio c/a directly quantifies the macroscopic effective polar angle of the electric and magnetic dipoles, which essentially determines the linear polarization degree of the emission. Based on this result, we further propose a pure optical technology to identify the three-dimensional orientation of a rod-shaped single microcrystal using the polarization-resolved microspectroscopy. Our results, demonstrating the physical origin of light polarization in ion-doped crystals, allow work toward on-demand polarization control with crystallography and provide a versatile platform for polarization-based microscale sensing in dynamical systems.
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Affiliation(s)
- Peng Li
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Yaxin Guo
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Ao Liu
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Xin Yue
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Taoli Yuan
- School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi'an 710021, P.R. China
| | - Jingping Zhu
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Yanpeng Zhang
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Feng Li
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China
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5
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Ohnoutek L, Olohan BJ, Jones RR, Zheng X, Jeong HH, Valev VK. Second harmonic Rayleigh scattering optical activity of single Ag nanohelices in a liquid. NANOSCALE 2022; 14:3888-3898. [PMID: 35212336 DOI: 10.1039/d1nr06800h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Determining the chirality of molecules and nanoparticles often relies on circular dichroism and optical rotation: two chiral optical (chiroptical) effects in the linear optical regime. Although these linear effects are weak compared to nonlinear chiroptical effects, they have the advantage of being measured in isotropic liquids - free from the complications of anisotropy. Recently, a nonlinear effect: hyper-Rayleigh scattering optical activity (HRS OA) has been shown to reliably distinguish between the two chiral forms of Ag nanohelices, suspended in isotropic liquids. However, this first demonstration of HRS OA also opened new questions. For instance, at a fundamental level, it is not clear what the role of interactions between nanoparticles is. Moreover, the influence of the ultrafast pulse chirp is unknown. Here, we demonstrate HRS OA from well below two Ag nanohelices in the illumination volume, precluding any interactions. Additionally, we performed the first measurements of HRS depolarization ratios in this system and find a value of ≈1. We also show that HRS is highly robust against the chirp of the ultrafast pulses. An important reason for the strong (down to single nanohelix) sensitivity of our experiments is the large chiroptical interaction at the fundamental frequency; this point is illustrated with two sets of numerical simulations of the electromagnetic near-fields. Our results highlight HRS OA as a highly sensitive experimental method for characterization of chiral solutions/suspensions, in tiny illumination volumes.
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Affiliation(s)
- Lukas Ohnoutek
- Centre for Photonics and Photonic Materials, University of Bath, Bath, BA2 7AY, UK
- Centre for Nanoscience and Nanotechnology, University of Bath, Bath, BA2 7AY, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, BA2 7AY, UK.
| | - Ben J Olohan
- Centre for Photonics and Photonic Materials, University of Bath, Bath, BA2 7AY, UK
- Centre for Nanoscience and Nanotechnology, University of Bath, Bath, BA2 7AY, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, BA2 7AY, UK.
| | - Robin R Jones
- Centre for Photonics and Photonic Materials, University of Bath, Bath, BA2 7AY, UK
- Centre for Nanoscience and Nanotechnology, University of Bath, Bath, BA2 7AY, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, BA2 7AY, UK.
| | - Xuezhi Zheng
- Department of Electrical Engineering (ESAT), WaveCore Division, KU Leuven, Kasteelpark Arenberg 10, BUS 2444, Leuven, B-3001, Belgium
| | - Hyeon-Ho Jeong
- Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 61005 Gwangju, Republic of Korea
| | - Ventsislav K Valev
- Centre for Photonics and Photonic Materials, University of Bath, Bath, BA2 7AY, UK
- Centre for Nanoscience and Nanotechnology, University of Bath, Bath, BA2 7AY, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, BA2 7AY, UK.
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6
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Li M, Yan S, Zhang Y, Chen X, Yao B. Optical separation and discrimination of chiral particles by vector beams with orbital angular momentum. NANOSCALE ADVANCES 2021; 3:6897-6902. [PMID: 36132368 PMCID: PMC9418904 DOI: 10.1039/d1na00530h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 09/24/2021] [Indexed: 06/15/2023]
Abstract
Chirality describes a reduced symmetry and abounds in nature. The handedness-dependent response usually occurs only when a chiral object interacts with another chiral entity. Light carrying orbital angular momentum (OAM) is inherently chiral due to the helical wave front. Here, we put forward a scheme that enables optical separation and simultaneous discrimination of single chiral particles using focused vector beams with OAM. Such focused vector vortex beams carrying radial-splitting optical chirality can selectively trap one enantiomer inside or outside the intensity maxima depending on the sign of the OAM. The particles with different chirality parameters can be trapped on different orbits and experience enhanced orbital motion. Moreover, the magnitude of OAM as well as the size of particle plays an important role in the chiral separation and discrimination. In addition to particle manipulation, the discussion of OAM in chiral light-matter interactions has potential application in, for example, optical enantioseparation or chiral detection.
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Affiliation(s)
- Manman Li
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences Xi'an 710119 China
| | - Shaohui Yan
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences Xi'an 710119 China
| | - Yanan Zhang
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences Xi'an 710119 China
| | - Xu Chen
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences Xi'an 710119 China
| | - Baoli Yao
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences Xi'an 710119 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan 030006 China
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7
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Valentín-Pérez Á, Rosa P, Hillard EA, Giorgi M. Chirality determination in crystals. Chirality 2021; 34:163-181. [PMID: 34766388 DOI: 10.1002/chir.23377] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/26/2021] [Accepted: 09/13/2021] [Indexed: 12/26/2022]
Abstract
This tutorial review article discusses chirality determination in the solid state, both in single crystals and in crystal assemblies, with an emphasis on X-ray diffraction. The main principles of using X-ray diffraction to reliably determine absolute structure are summarized, and the complexity which can be encountered in chiral structures-kryptoracemates, scalemates, and inversion twinning-is illustrated with examples from our laboratories and the literature. We then address the problem of the bulk crystallization and discuss different techniques to determine chirality in a large assembly of crystal structures, with a special prominence given to an X-ray natural circular dichroism mapping technique that we recently reported.
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Affiliation(s)
| | - Patrick Rosa
- Univ. Bordeaux, CNRS, Bordeaux-INP, ICMCB, UMR 5026, F-33600 Pessac, Cedex, France
| | - Elizabeth A Hillard
- Univ. Bordeaux, CNRS, Bordeaux-INP, ICMCB, UMR 5026, F-33600 Pessac, Cedex, France.,CNRS, Univ. Bordeaux, CRPP, UMR 5031, Pessac, France
| | - Michel Giorgi
- Aix Marseille Univ, CNRS, Centrale Marseille, FSCM, Spectropole, Marseille, France
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8
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Warning LA, Miandashti AR, McCarthy LA, Zhang Q, Landes CF, Link S. Nanophotonic Approaches for Chirality Sensing. ACS NANO 2021; 15:15538-15566. [PMID: 34609836 DOI: 10.1021/acsnano.1c04992] [Citation(s) in RCA: 77] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Chiral nanophotonic materials are promising candidates for biosensing applications because they focus light into nanometer dimensions, increasing their sensitivity to the molecular signatures of their surroundings. Recent advances in nanomaterial-enhanced chirality sensing provide detection limits as low as attomolar concentrations (10-18 M) for biomolecules and are relevant to the pharmaceutical industry, forensic drug testing, and medical applications that require high sensitivity. Here, we review the development of chiral nanomaterials and their application for detecting biomolecules, supramolecular structures, and other environmental stimuli. We discuss superchiral near-field generation in both dielectric and plasmonic metamaterials that are composed of chiral or achiral nanostructure arrays. These materials are also applicable for enhancing chiroptical signals from biomolecules. We review the plasmon-coupled circular dichroism mechanism observed for plasmonic nanoparticles and discuss how hotspot-enhanced plasmon-coupled circular dichroism applies to biosensing. We then review single-particle spectroscopic methods for achieving the ultimate goal of single-molecule chirality sensing. Finally, we discuss future outlooks of nanophotonic chiral systems.
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Affiliation(s)
| | | | | | - Qingfeng Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
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9
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Hananel U, Moshe AB, Markovich G, Alivisatos AP. Nanocrystals as Model Systems for Studying the Interplay Between Crystallization and Chirality. Isr J Chem 2021. [DOI: 10.1002/ijch.202100058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Uri Hananel
- School of Chemistry Tel Aviv University Tel Aviv 6997801 Israel
| | - Assaf Ben Moshe
- Materials Sciences Division Ernest Orlando Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Gil Markovich
- School of Chemistry Tel Aviv University Tel Aviv 6997801 Israel
| | - A. Paul Alivisatos
- Materials Sciences Division Ernest Orlando Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- Department of Chemistry University of California Berkeley CA 94720
- Kavli Energy NanoScience Institute Berkeley CA 94720 USA
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10
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Hananel U, Schwartz G, Paiss G, Arrico L, Zinna F, Di Bari L, Cheshnovsky O, Markovich G. Time-resolved circularly polarized luminescence of Eu 3+ -based systems. Chirality 2020; 33:124-133. [PMID: 33378790 DOI: 10.1002/chir.23293] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/10/2020] [Accepted: 12/15/2020] [Indexed: 11/09/2022]
Abstract
Chiral Eu3+ -based systems are frequently studied via circularly polarized luminescence spectroscopy. The emission lifetimes of each circular polarization, however, are virtually always ignored, because in a homogeneous sample of emitters, there should be no difference between the two. However, we show that in less robust Eu3+ complex structures, as in the chiral complex Eu (facam)3 , a difference in the lifetimes of the two circularly polarized emission components arises due to heterogeneity of the complexes. In this case, each species within the sample could have different degrees of circularly polarized luminescence and decay rates at certain emission lines. The superposition of the emission components of the various chiral species leads to an overall difference in decay rate between the two circular polarizations. Such a difference is also shown for Eu3+ -doped chiral TbPO4 ·D2 O nanocrystals. We believe that this kind of measurement could be a unique tool for determining the homogeneity of a lanthanide-based chiral system, where other methods might fail in this task.
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Affiliation(s)
- Uri Hananel
- School of Chemistry, Tel Aviv University, Tel Aviv, Israel
| | - Gal Schwartz
- School of Chemistry, Tel Aviv University, Tel Aviv, Israel
| | - Guy Paiss
- School of Chemistry, Tel Aviv University, Tel Aviv, Israel
| | - Lorenzo Arrico
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy
| | - Francesco Zinna
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy
| | - Lorenzo Di Bari
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy
| | | | - Gil Markovich
- School of Chemistry, Tel Aviv University, Tel Aviv, Israel
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11
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Chiroptical spectroscopy of a freely diffusing single nanoparticle. Nat Commun 2020; 11:4513. [PMID: 32908138 PMCID: PMC7481242 DOI: 10.1038/s41467-020-18166-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 08/05/2020] [Indexed: 11/09/2022] Open
Abstract
Chiral plasmonic nanoparticles can exhibit strong chiroptical signals compared to the corresponding molecular response. Observations are, however, generally restricted to measurements on stationary single particles with a fixed orientation, which complicates the spectral analysis. Here, we report the spectroscopic observation of a freely diffusing single chiral nanoparticle in solution. By acquiring time-resolved circular differential scattering signals we show that the spectral interpretation is significantly simplified. We experimentally demonstrate the equivalence between time-averaged chiral spectra observed for an individual nanostructure and the corresponding ensemble spectra, and thereby demonstrate the ergodic principle for chiroptical spectroscopy. We also show how it is possible for an achiral particle to yield an instantaneous chiroptical response, whereas the time-averaged signals are an unequivocal measure of chirality. Time-resolved chiroptical spectroscopy on a freely moving chiral nanoparticle advances the field of single-particle spectroscopy, and is a means to obtain the true signature of the nanoparticle's chirality.
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12
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Wang Z, Gao M, Ren S, Hao X, Qin W. Magnetic and Electric Control of Circularly Polarized Emission through Tuning Chirality-Generated Orbital Angular Momentum in Organic Helical Polymeric Nanofibers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1904857. [PMID: 31588656 DOI: 10.1002/adma.201904857] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/15/2019] [Indexed: 06/10/2023]
Abstract
Circularly polarized light emission promotes the development of smart photonic materials for advanced applications in chiral sensing and information storage. The orbital angular momentum is a unique property for organic chiral helical materials. In this work, a type of organic chiral polymeric nanowires is designed with strong chirality induced orbital angular momentum. Under the stimulus of an external magnetic field of 600 mT, circularly polarized emission from the chiral polymeric nanowire becomes more pronounced, where the g factor increases from 0.21 to 0.3. The observed phenomena mainly originate from the chirality-dependent orbital angular momentum. Moreover, the orbital angular momentum in helical chiral nanowire structures can be suppressed by inhibiting electron transport in a helical way to diminish circularly polarized light emission at room temperature.
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Affiliation(s)
- Zhongxuan Wang
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Mingsheng Gao
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Shenqiang Ren
- Department of Mechanical and Aerospace Engineering, Research and Education in Energy, Environment & Water (RENEW) Institute, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Xiaotao Hao
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Wei Qin
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China
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13
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Zhao J, Zhang T, Dong XY, Sun ME, Zhang C, Li X, Zhao YS, Zang SQ. Circularly Polarized Luminescence from Achiral Single Crystals of Hybrid Manganese Halides. J Am Chem Soc 2019; 141:15755-15760. [DOI: 10.1021/jacs.9b08780] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jian Zhao
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Tongjin Zhang
- CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xi-Yan Dong
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China
| | - Meng-En Sun
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Chong Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Xinlei Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yong Sheng Zhao
- CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Shuang-Quan Zang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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14
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Spontaneous and directed symmetry breaking in the formation of chiral nanocrystals. Proc Natl Acad Sci U S A 2019; 116:11159-11164. [PMID: 31097596 DOI: 10.1073/pnas.1821923116] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Symmetry plays a crucial part in our understanding of the natural world. Mirror symmetry breaking is of special interest as it is related to life as we know it. Studying systems which display chiral amplification, therefore, could further our understanding of symmetry breaking in chemical systems, in general, and thus also of the asymmetry in Nature. Here, we report on strong chiral amplification in the colloidal synthesis of intrinsically chiral lanthanide phosphate nanocrystals, measured via circularly polarized luminescence. The amplification involves spontaneous symmetry breaking into either left- or right-handed nanocrystals below a critical temperature. Furthermore, chiral tartaric acid molecules in the solution direct the amplified nanocrystal handedness through a discontinuous transition between left- and right-handed excess. We analyze the observations based on the statistical thermodynamics of critical phenomena. Our results demonstrate how chiral minerals with high enantiopurity can form in a racemic aqueous environment.
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