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meso ‐Aryl‐Substituted [26]Hexaphyrin(1.1.0.1.1.0) and [38]Nonaphyrin(1.1.0.1.1.0.1.1.0) from Oxidative Coupling of a Tripyrrane
Author(s) -
Shimizu Soji,
Taniguchi Ryuichiro,
Osuka Atsuhiro
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200463054
Subject(s) - protonation , aryl , chemistry , absorption (acoustics) , oxidative phosphorylation , conformational change , photochemistry , ion , stereochemistry , medicinal chemistry , biochemistry , organic chemistry , materials science , alkyl , composite material
Acid‐specific conformational changes : Protonation of meso ‐aryl‐substituted rubyrin 1 with HCl or CF 3 CO 2 H causes different conformational changes, as revealed by specific shifts in the UV/Vis absorption bands relative to those of the free‐base form (Cl − : blue shift; CF 3 CO 2 − : red shift). The distinct counteranion‐dependent color changes upon addition of the acids to the “anion sensor” 1 are easily detected.