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superchiral fields generated by nanostructures and their applications for chiral sensing

Chinese Physics B 2021年第11期30卷 32-48页

作者： Huizhen Zhang Weixuan Zhang Saisai Hou Rongyao Wang Xiangdong Zhang Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China

Chirality is ubiquitous in natural *** with similar physical and chemical properties,chiral enantiomers could play different roles in biochemical *** of chiral enantiomers is extremely important in biochemical,analytical chemistry,and pharmaceutical *** chiroptical spectroscopic methods are disadvantageous at a limited detection sensitivity because of the weak signals of natural chiral ***,superchiral fields were proposed to effectively enhance the interaction between light and molecules,allowing for ultrasensitive chiral *** theoretical and experimental works have been devoted to generation of superchiral fields based on artificial nanostructures and their application in ultrasensitive chiral *** this review,we present a survey on these *** begin with the introduction of chiral properties of electromagnetic ***,the optical chirality enhancement and ultrasensitive chiral detection based on chiral and achiral nanostructures are discussed ***,we give a short summary and a perspective for the future ultrasensitive chiral sensing.

关键词： superchiral fields chiral detection chiral nanostructures achiral nanostructures

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Absolute asymmetric synthesis driven by circularly polarized light

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中国化学快报:英文版 2023年第8期34卷 6-17页

作者： Chenlu He Yan Li School of Pharmacy and Pharmaceutical Science and Institute of Materia Medica Shandong First Medical UniversityShandong Academy of Medical SciencesNHC Key Laboratory of Biotechnology Drugs(Shandong Academy of Medical Sciences)Key Lab for Rare and Uncommon Diseases of Shandong ProvinceJi'nan 250117China Department of Chemistry National University of Singapore(NUS)Singapore 117549Singapore

Circularly polarized light(CPL)is an inherently chiral entity and is regarded as one of the possible deterministic signals that led to the evolution of homochirality in ***,CPL as an external physical field has been widely used in a technique known as absolute asymmetric synthesis,because a product enriched in one enantiomer is formed from racemic precursor molecules without the intervention of a chiral *** this review,we retrospect the historical research of CPL-induced absolute asymmetric synthesis,including chiral organic molecules,helical polymers,supramolecular assemblies,noble metal ***,based on these results,we concluded that the chiral photon-matter interaction is very faint due to the arrangement of molecular bonds giving rise to chiral features,is over a smaller distance than the helical pitch of CPL,leading extremely small enantiomeric excess for ***,we highlight the recently emerged technology called superchiral field,in which the superchiral far-field and near-field could enhance the dissymmetry of optical field and near-field,*** sum,we hope this review could bring some enlightenment to researchers and further improve the enantioselectivity of CPL-induced absolute asymmetric synthesis.

关键词： Asymmetric synthesis Circularly polarized light Photochemical reaction Chirality superchiral fields

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