Study on Interaction of L-Tryptophan with p-Sulfonatocalix[4]arene by Spectrofluorometry

来源 :Chinese Chemical Letters | 被引量 : 0次 | 上传用户:tffx7677
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The interactions between L-tryptophan(L-Trp) and water-soluble p-sulfonatocalix[4]- arene (SCX4) were investigated by spectrofluorometry. The effect of pH was discussed. The interaction process was estimated from the thermodynamic viewpoint. The SCX4 was found to be able to adjust its conformation to fit the size of L-Trp, and the benzene of L-Trp penetrated into the hydrophobic cavity of SCX4. Meanwhile, the binding mechanism was further elucidated by 1H NMR and molecular mechanics calculations. The interaction between L-tryptophan (L-Trp) and water-soluble p-sulfonatocalix [4] -arene (SCX4) were investigated by spectrofluorometry. The effect of pH was discussed. The interaction process was estimated from the thermodynamic viewpoint. The SCX4 was found to be able to adjust its conformation to fit the size of L-Trp, and the benzene of L-Trp penetrated into the hydrophobic cavity of SCX4. Meanwhile, the binding mechanism was further elucidated by 1H NMR and molecular mechanics calculations.
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