Arkivoc

Ionic interactions of anionic thiacalix [4] arene with cationic porphyrins

B Garg, T Bisht, SMS Chauhan

Index: Garg, Bhaskar; Bisht, Tanuja; Chauhan, Shive Murat Singh Arkivoc, 2010 , vol. 2010, # 2 p. 161 - 178

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Citation Number: 5

Abstract

Abstract A facile synthesis of 25, 26, 27, 28-tetrakis (alkyloxy)-2, 8, 14, 20-tetrathiacalix [4] arene-5, 11, 17, 23-tetrasulfonate via ipso substitution of p-tert-butylthiacalix [4] arene tetraalkyl ether with sulfuric acid is described. Ionic interaction of anionic thiacalix [4] arene and cationic porphyrins were quantitatively studied by UV-vis, fluorescence, 1H NMR and ESI-MS spectrometry. Binding constants were in the range of 108 M-1. Binding with axial ...