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Nguyen, Quynh Pham Bao,Kim, Jae-Nyoung,Kim, Taek-Hyeon Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.9
Novel fluorescent anion chemosensors based on anthracene-isothiouronium derivatives were synthesized. Isomerism due to the intramolecular mobility in these isothiouronium salts was detected by $^1H$ NMR spectroscopy. The effect of the substituent, temperature and solvent on the isomerism was also examined. The anthracene-isothiouronium sensor showed significant fluorescent enhancement upon the addition of various anions such as fluoride, acetate, and dihydrogen phosphate, even in the presence of water.
Nguyen, Quynh Pham Bao,Kim, Taek-Hyeon Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.12
Asymmetric glycolate alkylation reactions in the solid phase were investigated for the first time with good stereoselectivities being obtained by using a Wang resin supported 2-imidazolidinone chiral auxiliary.
2-Aminothiazolinium Based Tripodal Receptors:Synthesis and Recognition of Oxoanions
Nguyen, Quynh Pham Bao,Le, Thanh Nguyen,Kim, Taek-Hyeon Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.8
Novel 2-aminothiazolinium based tripodal receptors were designed and synthesized. The binding property of these receptors toward various anions was investigated by the isothermal titration calorimetry (ITC) method. Receptor 4 recognized the acetate anion with 1:1 stoichiometry, whereas it bound the other oxoanions such as sulfate and phosphate in complex modes. By modifying the phenyl groups at the 4-position of the thiazoline rings of the tripodal receptor 4 to induce a mutual aromatic stacking interaction among the three ligands, receptor 10 showed totally different binding behavior, which gave rise to the 1:1 binding mode for the sulfate anion. This result was confirmed by ESI MS spectrometry.
Quynh Pham Bao Nguyen,김재녕,김택현 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.9
Novel fluorescent anion chemosensors based on anthracene-isothiouronium derivatives were synthesized. Isomerism due to the intramolecular mobility in these isothiouronium salts was detected by 1H NMR spectroscopy. The effect of the substituent, temperature and solvent on the isomerism was also examined. The anthracene-isothiouronium sensor showed significant fluorescent enhancement upon the addition of various anions such as fluoride, acetate, and dihydrogen phosphate, even in the presence of water.
Quynh Pham Bao Nguyen,김택현 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.12
Asymmetric glycolate alkylation reactions in the solid phase were investigated for the first time with good stereoselectivities being obtained by using a Wang resin supported 2-imidazolidinone chiral auxiliary.