Chattopadhyay, Nitin (1995) Determination of pK∗ in excited state proton transfer (ESPT) reaction: a rearrangement of Weller's equation; advantage of dual luminescence Journal of Photochemistry and Photobiology A: Chemistry, 88 (1). pp. 1-4. ISSN 1010-6030
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Official URL: http://www.sciencedirect.com/science/article/pii/1...
Related URL: http://dx.doi.org/10.1016/1010-6030(94)03992-4
Abstract
The dual luminescence of certain fluorophores during excited state proton transfer (ESPT) reactions has been used for a convenient determination of the steady state equilibrium constants of the processes. From Weller's concept, a linear relationship has been developed between the logarithm of the relative fluorescence intensities of the deprotonated and protonated species and the pH of the solution; from this relationship, pK∗ values have been determined for several compounds in aqueous medium in the presence of different proton-abstracting bases, such as NaOH, NH3, EtNH2, Et2NH and Et3N. Although the method overcomes some of the shortcomings of Weller's technique, it has its own limitations.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Excited State Proton Transfer; Dual Luminescence; Equilibrium Constants; Carbazole |
| ID Code: | 74779 |
| Deposited On: | 19 Dec 2011 04:11 |
| Last Modified: | 19 Dec 2011 04:11 |
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