Rapid and real-time detection of arginine enantiomers by QCM sensor having a Calix[4]arene receptor bearing asymmetric centers

Locally superengineered cascade recognition–quantification zones in nanochannels for sensitive enantiomer identification

“…Compared with most of the recent reports on L/D-Arg recognition (Table S1 †), this enantiomer sensing device showed obvious advantages, such as easy operation, low cost, and a lower LOD value. [49][50][51][52] To demonstrate the chiral selectivity of the as-proposed asymmetric membrane for identifying Arg enantiomers, the recognition performance for other enantiomers, i.e., L/D-glutamic acid (L/D-Glu), L/D-phenylalanine (L/D-Phe), and L/D-histidine (L/D-His) was evaluated. For comparison, the chiral recognition ability of b-CD/TiO 2 M was also tested (Fig.…”

Recognition of 1‐phenylethylamine enantiomers by thin solid films of inherently chiral calix[4]arene

“…[1][2][3] The ability to recognize substrates and form supramolecular complexes with them underlies the use of such compounds in sensory techniques and technology. [4][5][6] As well, the unique spatial structure of calix [4] arene allows the formation of so-called inherently chiral compounds, the chirality of which is based on the absence of planes of symmetry or the center of inversion due to the asymmetric placement of several achiral groups on the macrocyclic platform. Recently, special attention has been paid to such compounds.…”

“…Calixarenes are widely used as molecular platforms for the design of specific receptors which are capable of high selectivity to recognize substrates close in size and properties—various cations, anions, and neutral molecules 1–3 . The ability to recognize substrates and form supramolecular complexes with them underlies the use of such compounds in sensory techniques and technology 4–6 . As well, the unique spatial structure of calix[4]arene allows the formation of so‐called inherently chiral compounds, the chirality of which is based on the absence of planes of symmetry or the center of inversion due to the asymmetric placement of several achiral groups on the macrocyclic platform.…”

Rapid Detection of Bifidobacterium bifidum in Feces Sample by Highly Sensitive Quartz Crystal Microbalance Immunosensor

“…At present, QCM immunosensor has been widely used in clinical testing, food hygiene, environmental testing, as well as other fields of chemical analysis, and biological analysis. The detection of bacteria by QCM is a new and attractive Research Topic in electronic informatics and medicine (Muckley et al, 2016 ; Tai et al, 2016 ; Chen et al, 2018 ; Ding et al, 2018 ; Lal and Tiwari, 2018 ; Temel et al, 2019 ).…”