849667-83-0Relevant articles and documents
1H NMR spectral evidence for a specific host-guest complexation induced charge localization in squaraine dyes
Ajayaghosh, Ayyappanpillai,Arunkumar, Easwaran
, p. 3135 - 3138 (2005)
(Chemical Equation Presented) Experimental support is provided for the charge localization in squaraines, a class of fundamentally and technologically important organic dyes, by 1H NMR analysis through a host-guest complexation approach. Specific binding of Ca2+ ions to the squaraine 2 with a podand sidearm resulted in a charge-localized structure 2a with dramatic shifts and resolution of the proton signals when compared to those of 2.