Immobilization of Thienyl-Containing Azo Pigments on Silica Gel Surface |
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| Authors: | G G Chirakadze Z E Geliashvili and T O Razmadze |
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| Institution: | (1) Georgian Technical University, ul. Kostava 77, Tbilisi, 380075, Georgia |
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| Abstract: | Reactions of chlorinated silica gel with thienyllithium and its derivatives gave silica gels modified by organic fragments. By successive chemical transformations of the latter immobilized thienyl-contaning azo pigments were obtained. Azo pigments can also be immobilized on silica gel surface through reactions with 2,4,6-trichloro-1,3,5-triazine. Silica gels with grafted azo pigments are characterized by high resistance to light and washing. |
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