Asymmetric Ruthenium Catalysis Enables Fluorophores with Point Chirality Displaying CPL Properties**

Abstract

A novel enantiopure π-allylruthenium(IV) precatalyst allowed the enantioselective and stereospecific allylations of indoles and gave access to indolin-3-ones containing vicinal stereogenic centers. Facile separation of diastereoisomers exhibiting opposite CPL activities in diverse solvents including water demonstrated the potential of these sustainable transformation and of the newly prepared molecules.

Construction of Circular Polarized Luminescence Molecules for Intense Near Infrared OLEDs

“…The CPL spectrum consists of the different spontaneous radiation of left and right circularly polarized light by a chiral emitting species, [16,17] which has been revived in 3D display, [18,19] quantum communication, [20][21][22] encryption [23][24][25] and asymmetric synthesis [26][27][28] due to its unique spatial propagation method. Despite the abundance of research conducted on organic CPL fluorescent materials in the visible light range, [29][30][31][32][33][34][35][36] there have been limited reports on NIR-CPL organic fluorescent materials with potential applications in biological imaging, optical storage, and CPL lasers.…”

Fluorescence-Selective Absorption and Circularly Polarized Fluorescence Energy Transfer Assist the Generation of Multicolor Circularly Polarized Luminescence in Chiral Helical Polyacetylene-Based Janus Nanofibers

“…Chiroptical nanomaterials with circularly polarized luminescence (CPL) performance are drawing substantial interest in multidisciplinary fields due to their promising potential in 3D displays, optical sensors, bioimaging, asymmetric catalysis, etc. − Among various CPL-active architectures, − CPL nanofibers have been widely studied, and most of them are prepared by a self-assembly strategy. − However, the nanofibers prepared by self-assembly are largely limited to specific systems, and the resulting products are discontinuous, which may not be conducive to practice applications. Delightedly, the past few years have witnessed the rapid development of an electrospinning technique, and it has proved to be an effective method for constructing flexible and continuous CPL nanofibers with a controlled morphology, uniformity, and the desired optical properties. − The advantages of electrospinning include ease of operation, reliable reproducibility, and low cost.…”