UV band splitting of chromogenic azo-coupled calix[4]crown upon cation complexation

Jong Yeol Kim, Guncheol Kim, Chung Ryul Kim, Seoung Ho Lee, Joung Hae Lee, Jong Seung Kim

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Calixcrown-6 compounds carrying a pair of phenylazo moieties on the upper rim and two OH groups, one OH group, and two OR groups on the lower rim have been prepared in both the cone and partial cone conformations. UV/vis spectral measurements showed a red shift upon the addition of Ca2+ to the calixcrown carrying two OH groups and a blue shift for the calixcrown carrying two OR groups. For the compounds with two OR groups on the lower rim and a fixed partial cone conformation, a blue shift caused by electrostatic interaction between the oxygen atoms of OR and the metal ion as well as a red shift caused by the π-metal complexation between the rotated calix benzene and the metal ion were observed.

Original languageEnglish
Pages (from-to)1933-1937
Number of pages5
JournalJournal of Organic Chemistry
Volume68
Issue number5
DOIs
Publication statusPublished - 2003 Mar 7

ASJC Scopus subject areas

  • Organic Chemistry

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