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Applied Spectroscopy

Applied Spectroscopy


  • Vol. 49, Iss. 4 — Apr. 1, 1995
  • pp: 520–525

Influence of Triethanolamine on Aqueous β-Cyclodextrin/Pyrene Complexes

A. Yvette Will, Arsenio Muñoz de la Peña, Thilivhali T. Ndou, and Isiah M. Warner

Applied Spectroscopy, Vol. 49, Issue 4, pp. 520-525 (1995)

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The influence of triethanolamine (TEA) on the aqueous β-CD/pyrene fluorescence is examined. Collisional quenching of pyrene by TEA is indicated by Stern-Volmer plots. However, a decrease in the quenching is observed in the presence of β-cyclodextrin, which indicates an effective protection of the included pyrene molecules against quenching from TEA. A decrease in the apparent formation constant of the β-CD/pyrene complex also occurs in the presence of TEA. This phenomenon is attributed to a combination of an increased bulk solvent hydrophobicity and a competitive equilibrium between pyrene and TEA for the β-CD cavity. The present study indicates that TEA is not co-included in the β-CD/pyrene complex.

A. Yvette Will, Arsenio Muñoz de la Peña, Thilivhali T. Ndou, and Isiah M. Warner, "Influence of Triethanolamine on Aqueous β-Cyclodextrin/Pyrene Complexes," Appl. Spectrosc. 49, 520-525 (1995)

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