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chiral transmission by an open evolution trajectory in a non-Hermitian system

Light(Science & Applications) 2024年第4期13卷 628-636页

作者： Xiaoqian Shu Qi Zhong Kai Hong Oubo You Jian Wang Guangwei Hu Andrea Alù Shuang Zhang Demetrios N.Christodoulides Lin Chen Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China. Zhejiang Lab Hangzhou 311121China. CREOL College of Optics and PhotonicsUniversity of Central FloridaOrlandoFlorida 32816USA. Department of Physics The University of Hong KongHong KongChina. School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore. Photonics Initiative Advanced Science Research CenterCity University of New YorkNew YorkNY 10031USA. Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518063China

Exceptional points(EPs),at which two or more eigenvalues and eigenstates of a resonant system coalesce,are associated with non-Hermitian Hamiltonians with gain and/or loss elements.Dynamic encircling of EPs has received significant interest in recent years,as it has been shown to lead to highly nontrivial phenomena,such as chiral transmission in which the final state of the system depends on the encircling handedness.Previously,chiral transmission for a pair of eigenmodes has been realized by establishing a closed dynamical trajectory in parity-time-(PT-)or anti-PT-symmetric systems.Although chiral transmission of symmetry-broken modes,more accessible in practical photonic integrated circuits,has been realized by establishing a closed trajectory encircling EPs in anti-PTsymmetric systems,the demonstrated transmission efficiency is very low due to path-dependent losses.Here,we demonstrate chiral dynamics in a coupled waveguide system that does not require a closed trajectory.Specifically,we explore an open trajectory linking two infinite points having the same asymptotic eigenmodes(not modes in PT-and anti-PT-symmetric systems),demonstrating that this platform enables high-efficiency chiral transmission,with each eigenmode localized in a single waveguide.This concept is experimentally implemented in a coupled silicon waveguide system at telecommunication wavelengths.Our work provides a new evolution strategy for chiral dynamics with superior performance,laying the foundation for the development of practical chiral-transmission devices.

关键词： chiral system symmetric

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chiral coating-mediated interactions of bacteria with diverse biointerfaces

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Science China Chemistry 2023年第12期66卷 3594-3601页

作者： Hejin Jiang Rui Liu Ying Liu Huilong Luo Zhenping Cao Jinyao Liu Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine Institute of Molecular MedicineState Key Laboratory of Systems Medicine for CancerRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200127China

Bacteria,as living agents,have been widely used for microbial therapy due to their inherent ability to colonize different in vivo microenvironments,particularly in the gut and tumor.The interaction with diverse biointerfaces plays a critical role in bacterial colonization,and thereby determine the ultimate efficacy of microbial therapy.Although surface modification of bacteria with exogenous functional motifs can vary their interaction with surroundings,the effects of surface chirality of modified bacteria on mucous adhesion,tumor cell binding,and bacterial competition remain unknown.Here,we describe surface chirality-dependent selective interactions of bacteria to mucins,tumor cells,and pathogens.By coating bacteria with cationic polyethyleneimine modified with different chiral amino acids through electrostatic interaction,we find that bacteria coated with a D-chiral surface structure exhibit greatly increased adhesion to both mucins and tumor cells compared with those of L-and DL-structures.In addition,by adjusting the chirality of the coating,wrapped probiotic bacteria can selectively resist pathogenic bacteria,showing great potential to enhance colonization and positively modulate the gut and tumor microbiota.This work discloses surface chirality-dependent interaction of bacteria with different biointerfaces,showing a potential to tune the colonization and therapeutic effect of living bacterial agents for disease treatment.

关键词： bacteria coating chiral adhesion living agents

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chiral porphyrin assemblies

聚集体(英文)

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聚集体(英文) 2023年第1期4卷 27-40页

作者： Li Zhang TianyuWang Jianzhuang Jiang Minghua Liu Beijing National Laboratory for Molecular Science(BNLMS) CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijingP.R.China Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of ChemistryUniversity of Science and Technology BeijingBeijingP.R.China

Porphyrins are among the most important macrocycles because they perform many essential functions in living systems and serve as building blocks in many functional materials.Incorporating the chirality into porphyrins can aid biomimetic research and the exploration of new functional materials.In this review,recent developments in chiral porphyrin assemblies are highlighted.The review is mainly divided into two sections:the different strategies for constructing chiral porphyrin assemblies and the applications.The formation of chiral porphyrin assemblies can be from porphyrin molecules substituted with chiral groups;achiral porphyrins induced by chiral additives and spontaneous deracemizations of achiral porphyrins during the assemblies.We also provide an overview of the applications of chiral porphyrin assemblies in chiral sensing,asymmetry catalysis,circularly polarized luminescence,and so on.The further challenge in the field is discussed.

关键词： chiral circularly polarized luminescence helical porphyrins self-assembly

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chiral phosphoric acid-catalyzed regio- and enantioselective reactions of functionalized propargylic alcohols

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Organic Chemistry Frontiers 2022年第5期9卷 1234-1240页

作者： Chenxiao Qian Meiwen Liu Jianwei Sun Pengfei Li Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of CatalysisCollege of ScienceSouthern University of Science and TechnologyShenzhenGuangdong518055China Department of Chemistry The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina

Propargylic alcohols have been known as useful substrates in a wide range of asymmetric reactions.In particular,chiral phosphoric acid(CPA)catalyzed reactions of functionalized propargylic alcohols have opened robust ... 详细信息

关键词： alcohols catalyzed chiral

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Aggregation-Induced Synthesis (AIS): Asymmetric Synthesis via chiral Aggregates

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Research 2022年第4期2022卷 731-739页

作者： Hossein Rouh Yao Tang Ting Xu Qingkai Yuan Sai Zhang Jia-Yin Wang Shengzhou Jin Yu Wang Junyi Pan Hannah LWood James D.McDonald Guigen Li Department of Chemistry and Biochemistry Texas Tech UniversityLubbockTexas 79409-1061USA Institute of Chemistry and BioMedical Sciences School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China

A new chiral aggregate-based tool for asymmetric synthesis has been developed by taking advantage of chiral aggregates of GAP(Group-Assisted Purification)reagents,N-phosphonyl imines.This tool was proven to be successful in the asymmetric GAP synthesis of functionalized 2,3-dihydrobenzofurans by reacting salicyl N-phosphonyl imines with dialkyl bromomalonates in various cosolvent systems.The chiral induction can be controlled by differentiating between two asymmetric directions simply by changing the ratios of cosolvents which are commonly adopted in AIE(aggregation-induced emission)systems.The formation of chiral aggregates was witnessed by a new analytical tool-aggregation-induced polarization(AIP).The present synthetic method will be broadly extended for general organic synthesis,particularly,for asymmetric synthesis and asymmetric catalysis in the future.

关键词： asymmetric chiral synthesis

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chiral self-assembly of terminal alkyne and selenium clusters organic–inorganic hybrid

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Nano Research 2022年第3期15卷 2741-2745页

作者： Zhi Chen Tao Lin Haohan Li Mingzi Sun Chenliang Su Bolong Huang Kian Ping Loh SZU-NUS Collaborative Innovation Center for Optoelectronic Science&Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsCollege of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Department of Chemistry Centre for Advanced 2D Materials(CA2DM)National University of Singapore3 Science Drive 3Singapore 117543Singapore College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARChina

The on-surface self-assembly of inorganic atomic clusters and organic molecules offers significant opportunities to design novel hybrid materials with tailored functionalities.By adopting the advantages from both inorganic and organic components,the hybrid self-assembly molecules have shown great potential in future optoelectrical devices.Herein,we report the co-deposition of 4,8-diethynylbenzo[1,2-d-4,5-d0]bisoxazole(DEBBA)and Se atoms to produce a motif-adjustable organic–inorganic hybrid self-assembly system via the non-covalent interactions.By controlling the coverage of Se atoms,various chiral molecular networks containing Se,Se_(6),Se_(8),and terminal alkynes evolved on the Ag(111)surface.In particular,with the highest coverage of Se atoms,phase segregation into alternating one-dimensional chains of non-covalently bonded Se_(8) clusters and organic ligands has been noticed.The atom-coverage dependent evolution of self-assembly structures reflects the remarkable structural adaptability of Se clusters as building blocks based on the spontaneous resize to reach the maximum non-covalent interactions.This work has significantly extended the possibilities of flexible control in self-assembly nanostructures to enable more potential functions for broad applications.

关键词： self-assembly inorganic–organic hybrid chiral Se cluster concentration-dependent

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Circularly Polarized Light-Enabled chiral Nanomaterials:From Fabrication to Application

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Nano-Micro Letters 2023年第3期15卷 171-189页

作者： Changlong Hao Gaoyang Wang Chen Chen Jun Xu Chuanlai Xu Hua Kuang Liguang Xu International Joint Research Laboratory for Biointerface and Biodetection State Key Lab of Food Science and TechnologySchool of Food Science and TechnologyJiangnan UniversityWuxiJiangsu 214122People’s Republic of China Department of Neurology China National Clinical Research Center for Neurological DiseasesBeijing Tiantan HospitalCapital Medical UniversityNo.119 South 4Th Ring West RoadBeijing 100070People’s Republic of China

For decades,chiral nanomaterials have been extensively studied because of their extraordinary properties.chiral nanostructures have attracted a lot of interest because of their potential applications including biosensing,asymmetric catalysis,optical devices,and negative index materials.Circularly polarized light(CPL)is the most attractive source for chirality owing to its high availability,and now it has been used as a chiral source for the preparation of chiral matter.In this review,the recent progress in the field of CPL-enabled chiral nanomaterials is summarized.Firstly,the recent advancements in the fabrication of chiral materials using circularly polarized light are described,focusing on the unique strategies.Secondly,an overview of the potential applications of chiral nanomaterials driven by CPL is provided,with a particular emphasis on biosensing,catalysis,and phototherapy.Finally,a perspective on the challenges in the field of CPL-enabled chiral nanomaterials is given.

关键词： Circularly polarized light chiral Nanomaterials Fabrication Application

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Unclonable human-invisible machine vision markers leveraging the omnidirectional chiral Bragg diffraction of cholesteric spherical reflectors

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Light(Science & Applications) 2022年第11期11卷 2583-2601页

作者： Hakam Agha Yong Geng Xu Ma Deniz IsInsu Avsar Rijeesh Kizhakidathazhath Yan-Song Zhang Ali Tourani Hriday Bavle Jose-Luis Sanchez-Lopez Holger Voos Mathew Schwartzo Jan P.F.Lagerwall University of Luxembourg Department of Physics&Materials Science1511 LuxembourgLuxembourg University of Luxembourg Interdisciplinary Centre for SecurityReliability and Trust(SnT)1855 LuxembourgLuxembourg University of Luxembourg University of LuxembourgDepartment of EngineeringL-1359 LuxembourgLuxembourg New Jersey Institute of Technology College of Architecture and DesignUniversity HeightsNewarkNJUSA

The seemingly simple step of molding a cholesteric liquid crystal into spherical shape,yielding a Cholesteric Spherical Reflector(CSR),has profound optical consequences that open a range of opportunities for potentially transformative technologies.The chiral Bragg diffraction resulting from the helical self-assembly of cholesterics becomes omnidirectional in CSRs.This turns them into selective retroreflectors that are exceptionally easy to distinguish-regardless of background--by simple and low-cost machine vision,while at the same time they can be made largely imperceptible to human vision.This allows them to be distributed in human-populated environments,laid out in the form of QR-code-like markers that help robots and Augmented Reality(AR)devices to operate reliably,and to identify items in their surroundings.At the scale of individual CSRs,unpredictable features within each marker turn them into Physical Unclonable Functions(PUFs),of great value for secure authentication.Via the machines reading them,CSR markers can thus act as trustworthy yet unobtrusive links between the physical world(buildings,vehicles,packaging...).and its digital twin computer representation.This opens opportunities to address pressing challenges in logistics and supply chain management,recycling and the circular economy,sustainable construction of the built environment,and many other fields of individual,societal and commercial importance.

关键词： spherical steric chiral

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Construction of axially chiral styrene-type allylamines via chiral phosphoric acid-catalyzed asymmetric reductive amination

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Organic Chemistry Frontiers 2022年第3期9卷 764-770页

作者： You-Dong Shao Jin-Shuo Feng Dan-Dan Han Kang-Hui Pan Ling Zhang Yi-Fan Wang Zhong-Hui Ma Pei-Ru Wang Mingjing Yin Dao-Juan Cheng School of Chemistry and Chemical Engineering Heze UniversityHeze 274015China School of Pharmacy Anhui University of Chinese MedicineHefei 230012China

The first enantioselective synthesis of axially chiral styrene-type allylamines was achieved through chiral phosphoric acid mediated atroposelective reductive amination of 1-enal substituted 2-naphthols.This protocol features a broad substrate scope,good enantioselectivities(up to 90%ee)and mild reaction conditions,thus providing a new entry to the challenging atropisomeric acyclic styrene scaffolds.

关键词： styrene chiral allyl

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A chiral aldehyde-induced tandem conjugated addition–lactamization reaction for constructing fully substituted pyroglutamic acids

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Organic Chemistry Frontiers 2022年第5期9卷 1422-1426页

作者： Wen-Zhe Wang Hao-Ran Shen Jian Liao Wei Wen Qi-Xiang Guo Key Laboratory of Applied Chemistry of Chongqing Municipality School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing400715China

A catalytic asymmetric tandem reaction including a chiral aldehyde catalyzed conjugated addition and an intramolecular lactamization is reported in this work.Under the optimal reaction conditions,various fully substituted pyroglutamic acids bearing three vicinal chiral centers were generated in good-to-excellent yields and stereoselectivities.A reasonable reaction mechanism is proposed to illustrate the observed stereoselective control results.

关键词： chiral substituted conjugated

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