• Bulletin of the Korean Chemical Society
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• 제32권spc8호
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• pp.2933-2937
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• 2011

A new highly selective receptor (3) based on an acridine-imidazolium functionalized cholestane for anion sensing was designed and synthesized. A binding study of 3 with various anions was assessed by UV-vis and fluorescence spectroscopies in dry CH3CN. Receptor 3 showed the highest selectivity toward hydrogen pyrophosphate (Ka = $1.5{\times}10^4M^{-1}$).

• Bulletin of the Korean Chemical Society
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• 제30권11호
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• pp.2735-2738
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• 2009

A simple colorimetric anion chemosensor based on 2-amino-6-nitrobenzothiazole was synthesized. The addition of tetrabutylammonium (TBA) salts of $F^-,\;{CH_3COO}^-,\;and\;{H_2PO_4}^-$ to the solution of receptor 3 caused dramatic and clearly observable color changes from light to dark yellow due to the deprotonation process which is totally different from previously reported receptors based on the same motif. According to the basicity of the anions, the sensitivity of receptor 3 towards various anions decreased in the following order: ${CH_3COO}^-\;>\;F^-\;>\;{H_2PO_4}^-$.

• Bulletin of the Korean Chemical Society
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• 제32권spc8호
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• pp.2891-2892
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• 2011

• Bulletin of the Korean Chemical Society
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• 제25권9호
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• pp.1411-1413
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• 2004

• Bulletin of the Korean Chemical Society
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• 제23권1호
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• pp.145-148
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• 2002

• Bulletin of the Korean Chemical Society
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• 제32권4호
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• pp.1228-1230
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• 2011

A new amine receptor 2 utilizing anthracene and nitrophenyl group as signaling group was designed and synthesized. The receptor 2 only utilizes four amine N-H's and 9-anthracenyl hydrogen to bind anions. The receptor 2 can bind anions through hydrogen bonds with a selectivity of $CH_3CO_2^-$ > $H_2PO_4^-$ > $F^-$ > $C_6H_5CO_2^-$ > $Cl^-$ in highly polar solvent such as DMSO without protonation of amine.

• Bulletin of the Korean Chemical Society
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• 제31권5호
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• pp.1204-1208
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• 2010

Anion recognition via hydrogen-bonding interactions could be monitored with changes in UV-vis absorption spectra and in some cases easily monitored with naked eye. Urea receptors 1 and 2 connected with both an azo group and a nitrophenyl group as a signaling group for color change proved to be an efficient naked eye receptor for the fluoride ion. The anion recognition phenomena of the receptors 1 and 2 via hydrogen-bonding interactions were investigated through UV-vis absorption and $^1H$ NMR spectra.

• Bulletin of the Korean Chemical Society
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• 제30권9호
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• pp.2101-2106
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• 2009

A series of facial amphiphiles 3,7-diaminocholestane were synthesized from 3,7-diketocholestane via 2 sequential reductive aminations and anion recognition was evaluated with acetate, chloride, bromide, fluoride and phosphate anions. The stereo-selective reductive amination protocol was utilized to synthesized facial amphiphiles afforded receptors in high yields. The molecular receptor 2 showed the highest binding constant with acetate in a 1:1 ratio.

• Bulletin of the Korean Chemical Society
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• 제30권8호
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• pp.1743-1748
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• 2009

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.

• Bulletin of the Korean Chemical Society
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• 제30권12호
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• pp.3089-3091
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• 2009