The assembly of rotaxane-like dye/cyclodextrin/surface complexes on aluminium trihydroxide or goethite.
Simple azo-dyes carrying phosphonic acid and arsonic acid substituents such as 4-(4-hydroxyphenyl azo)phenylphosphonic acid (5) and 4-(4-hydroxyphenylazo)phenylarsonic acid (6) bind more strongly to high surface area oxides such as aluminium trihydroxide and goethite than their carboxylic and sulfonic acid analogues and the phosphonate-functionalized dyes have been shown to have greater humidity fastness when printed onto commercial alumina-coated papers. Adsorption isotherm measurements provide evidence for the formation of ternary dye/cyclodextrin/surface complexes. Dyes which form such ternary complexes show higher light fastness when printed onto alumina coated papers in an ink formulation containing alpha-cyclodextrin.
Cooper
Rachel J
RJ
School of Chemistry, University of Edinburgh, Joseph Black Building, Kings Buildings, West Mains Road, Edinburgh, UKEH9 3JJ.
Camp
Philip J
PJ
Gordon
Ross J
RJ
Henderson
David K
DK
Henry
Dorothy C R
DC
McNab
Hamish
H
De Silva
Sonali S
SS
Tackley
Daniel
D
Tasker
Peter A
PA
Wight
Paul
P