Synthesis and polymerization of cationic ...
|Title||Synthesis and polymerization of cationic bis(Cyclopentadienyliron)arene complexes containing arylazo dyes.|
|Author(s)||A. Abd-El-Aziz, N. Pereira, W. Boraie, E. Todd, T. Afifi, W. Budakowski, K. Friesen|
|Journal||Section Title: Chemistry of Synthetic High Polymers, Journal of Inorganic and Organometallic Polymers and Materials|
|Abstract||The reaction of Î·6-p-dichlorobenzene-Î·5-cyclopentadienyliron cations with 4,4'-bis(4-hydroxyphenyl)valeric acid provided diiron complexes, which were reacted with a no. of arylazo dyes to give arylazo dye-contg. cationic bis(cyclopentadienyliron)arene complexes (monomers). The monomers were polymd. via nucleophilic arom. substitution using 1,8-octanedithiol, 4,4'-thiobisbenzenethiol, or bisphenol A to produce the desired colored cationic organoiron polymers. The wt.-av. mol. wts. were estd. to range from 11,800 to 31,600. UV-vis studies conducted in DMF showed that the metalated polymers exhibited Î»max of 412-491 nm. Addn. of HCl to the polymer soln. caused a bathochromic shift into the range of 515-530 nm. Thermogravimetric anal. (TGA) revealed that the iron moieties were cleaved between 205 and 248Â°, while the polyether-thioether backbone degraded between 380 and 613Â°. Differential scanning calorimetry (DSC) showed that the polymers exhibited glass transition temps. (Tg) ranging from 106 to 184Â°. [on SciFinder(R)]|
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