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Molecular Recognition of Neutral Substrates by New Tetraaminocalix[4]arene Derivative
Satish Balasaheb Nimse,Keum-Soo Song,Chan-Yong Jung,Woon-Yong Eoum,김태선 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.6
The recognition of neutral aromatic substrates by different neutral calix[4]arene receptors 1, 2, and 3 was studied by NMR spectroscopy. The stoichiometry is 1:1 in all cases as was confirmed by jobs plot. Owing to the deep cavity, 1 affords stronger binding abilities for substrate 4 and 5, while all receptors remained inert for substrates 6 and 7. The binding constants determined by 1H NMR titration show that the recognition of substrate 4 by 1 gives strongest complexation (Ka of 9.8 × 102 M-1).
Molecular Recognition of Neutral Substrates by New Tetraaminocalix[4]arene Derivative
Nimse, Satish Balasaheb,Song, Keum-Soo,Jung, Chan-Yong,Eoum, Woon-Yong,Kim, Tai-Sun Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.6
The recognition of neutral aromatic substrates by different neutral calix[4]arene receptors 1, 2, and 3 was studied by NMR spectroscopy. The stoichiometry is 1:1 in all cases as was confirmed by jobs plot. Owing to the deep cavity, 1 affords stronger binding abilities for substrate 4 and 5, while all receptors remained inert for substrates 6 and 7. The binding constants determined by $^1H$ NMR titration show that the recognition of substrate 4 by 1 gives strongest complexation ($K_a\;of\;9.8\;{\times}\;102\;M^{-1}$).