Kanao, Eisuke; Tsuchiya, Yuko; Tanaka, Kei; Masuda, Yusuke; Tanigawa, Tetsuya; Naito, Toyohiro; Sano, Tomoharu; Kubo, Takuya; Otsuka, Koji published an article in 2021. The article was titled 《Poly(ethylene glycol) Hydrogels with a Boronic Acid Monomer via Molecular Imprinting for Selective Removal of Quinic Acid Gamma-Lactone in Coffee》, and you may find the article in ACS Applied Polymer Materials.HPLC of Formula: 1692-25-7 The information in the text is summarized as follows:
We developed molecularly imprinted polymers (MIPs) with a poly(ethylene glycol) (PEG)-based cross-linker and boronic acids in functional monomers, which selectively form a complex with a diol structure for selective removal of lactones from a coffee beverage. We synthesized a boronic acid monomer, 1-allylpyridinium-3-boronic acid, which has lower pKa and stronger binding strength to saccharides than commonly used boronic acids. Then, we prepared the MIPs with the monomer and succeeded in selective adsorption for a type of lactones, quinic acid gamma-lactone (QAGL). Furthermore, the high hydrophilicity of PEG and the mol. imprinting effect prevented an un-specific adsorption of other components in coffee. Finally, we achieved in removal of QAGL in coffee with high yield and at high speed by using the MIP-based microsphere as a separation medium in solid-phase extraction This study provides a simple method for better-tasting freshly brewed coffee. In the part of experimental materials, we found many familiar compounds, such as Pyridin-3-ylboronic acid(cas: 1692-25-7HPLC of Formula: 1692-25-7)
Pyridin-3-ylboronic acid(cas: 1692-25-7) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. HPLC of Formula: 1692-25-7