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The cover image is based on the Research Article Wireless electromechanical enantio‐responsive valves by Gerardo Salinas et al., https://doi.org/10.1002/chir.23521.
Microfluidic valves based on chemically responsive materials have gained considerable attention in recent years. Herein, a wireless enantio‐responsive valve triggered by bipolar electrochemistry combined with chiral recognition is reported. A conducting polymer actuator functionalized with the enantiomers of an inherently chiral oligomer was used as bipolar valve to cover a tube loaded with a dye...
Two chiral triptycene derivatives were analyzed on the Chiralpak IB‐U column packed with cellulose tris(3,5‐dimethylphenylcarbamate)‐based sub‐2‐μm diameter particles. Under normal‐phase conditions, sub‐minute baseline enantioseparations were obtained. Differences in structural elements and chromatographic behavior of the investigated compounds were evaluated to identify the interactions that drive...
Bipolar electrochemistry has gained increasing attention in recent years as an attractive transduction concept in analytical chemistry in general and, more specifically, in the frame of chiral recognition. Herein, we use this concept of wireless electrochemistry, based on the combination of the enantioselective oxidation of a chiral probe with the emission of light from a light‐emitting diode (LED),...
The cover image is based on the Special Issue Article Hybrid light‐emitting devices for the straightforward readout of chiral information by Gerardo Salinas et al., https://doi.org/10.1002/chir.23370.
2,2′‐Bis[2‐(5,2′‐bithienyl)]‐3,3′‐bithianaphthene (1) is the progenitor of a class of C2 symmetric thiophene‐based electroactive monomers that, when electrooxidized in the enantiomerically pure form, produce inherently chiral films endowed with outstanding electrochemical enantiorecognition properties. The enantioselective high‐performance liquid chromatography (HPLC) is the only approach used so...
The residual enantiomers of three tris‐(3‐indolyl)‐phosphane oxides bearing different alkyl groups (methyl, ethyl or i‐propyl) in position 2 of the indole rings constituting the blades were separated on the immobilized type Chiralpak IC column in polar organic and reversed‐phase modes. The good enantioselectivity and versatility of the IC CSP allowed easy isolation of the enantiomerically highly enriched...
The stereolability of chiral Hoveyda–Grubbs II type ruthenium complexes bearing N‐heterocyclic carbene (NHC) ligands with Syn‐phenyl groups on the backbone and Syn‐ or Anti‐oriented o‐tolyl N‐substituents was studied by resorting to dynamic high‐performance liquid chromatography (D‐HPLC). A complete chromatographic picture of the involved stereoisomers (four for Anti‐ and two for Syn‐complexes) was...
Residual stereoisomers result whenever closed subsets of appropriately substituted interconverting isomers (the residual stereoisomers) are generated from a full set of stereoisomers under the operation of a favored stereomerization mechanism. In the case of the three‐bladed propellers, differentiation of the edges of the blades and strict correlation in the motion of the rings are the prerequisites...
A direct semipreparative HPLC enantioseparation of two chiral thiazolidinone derivatives having cyclooxygenase‐2 inhibition activity was performed on the Chiralpak IA chiral stationary phase. Semipreparative amounts of enantiopure forms were collected using acetonitrile‐ethanol‐trifluoroacetic acid mixtures as mobile phase. The absolute configuration of both compounds was unequivocally established...
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