6‐TIPS‐β‐Cyclodextrin‐Modified Fe₃O₄ for Facile Enantioseparation of 1‐(1‐Naphthyl)ethylamine

Abstract

A new type of chiral magnetic nanoparticle was prepared from covalently linked magnetic nanoparticles (Fe O ) and heptakis-(6-O-triisopropylsilyl)-β-cyclodextrin (6-TIPS-β-CD). The resulting selectors (TIPS-β-CD-MNPs) combined the good magnetic properties Fe O and efficient chiral recognition ability of 6-TIPS-β-CD. The enantioselectivity of TIPS-β-CD-MNPs towards 1-(1-naphthyl)ethylamine was six times higher than that of the parent β-CD modified Fe O particles.

Selenic Acid Etching Assisted Vacancy Engineering for Designing Highly Active Electrocatalysts toward the Oxygen Evolution Reaction

“…Remarkably, OER performances of our Se vacancy‐rich 3d metal selenide series M m Se n (Co 0.85 Se 1− x , FeSe 2− x @C, NiSe 2− x @C) surpassed that of most high‐performance electrocatalysts reported previously and recently, such as CoBDC‐NF (η10 = 252 mV, 50 mV dec –1 ), [ 44 ] Co/β‐Mo 2 C@NCNTs (η10 = 356 mV, 67 mV dec –1 ), [ 45 ] NCoM‐Cb‐Ar (η10 = 340 mV, 76 mV dec –1 ), [ 46 ] Co/CNFS(1000) (η10 = 320 mV, 79 mV dec –1 ), [ 47 ] Ag@Co(OH) x /CC (η10 = 250 mV, 76 mV dec –1 ), [ 48 ] Co 2 Mo 3 O 8 @NC (η10 = 331 mV, 87.5 mV dec –1 ), [ 49 ] NiCoP (η10 = 330 mV, 96 mV dec –1 ), [ 50 ] Cs 0.4 La 0.6 Mn 0.25 Co 0.75 O 3 (η10 = 374 mV, 101 mV dec –1 ). [ 51 ]…”

Cyclodextrin‐Functionalised Nanomaterials for Enantiomeric Recognition

“…[74,75] The magnetic nanoparticles employed for enantiomeric separation has drastically changed over time, with nanomaterials comprised of the relatively simpler Fe 3 O 4 NPs conjugated to cyclodextrin being the first material developed for this purpose. [76][77][78][79][80][81] However, these nanomaterials, although displaying chiral discrimination, were very limited in their capabilities for effective enantioseparation, with enantiomeric excess (e.e.) ranging from 12.3 to 73 % in optimized conditions, with only one example of Tryptophan reaching 94 % e.e.…”