Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Spectral study on the inclusion complex of cryptophane-E and CHCl3

Language

English

Abstract

Cryptophane-E was synthesized from vanillin by a three-step method, and its absorption and fluorescence spectroscopic properties were determined. Two absorption bands at about 245-260 and 280-290 nm were observed for cryptophane-E and the fluorescence emission maxima were at 320-330 nm depending on the solvent used. The interaction of cryptophane-E with CHCl3 was studied in detail by absorption and fluorescence spectroscopies. The results showed that cryptophane-E and CHCl3 can easily form a stable 1:1 host-guest inclusion complex. Their binding constant (K) was determined by Benesi-Hildebrand equation and the nonlinear least squares fit method. The binding constant is largest in ethyl acetate, followed by dioxane and with acetonitrile as the smallest. In addition, the effect of guest volume on the host-guest inclusion complex was investigated. Guest molecules including CH2Cl2 and CCl4 were unable to form inclusion complex with cryptophane-E because of sizes mismatching with the host cavity. © 2009 Elsevier B.V. All rights reserved.

Keywords

Absorption, CHCl3, Cryptophane-E, Fluorescence, Inclusion complex

Publication Date

2010

Source Publication Title

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Volume

75

Issue

1

Start Page

157

End Page

161

Publisher

Elsevier

DOI

10.1016/j.saa.2009.10.004

Link to Publisher's Edition

http://dx.doi.org/10.1016/j.saa.2009.10.004

ISSN (print)

13861425

ISSN (electronic)

18733557

This document is currently not available here.

Share

COinS