Organoiron polynorbornenes with pendent arylazo and ...
|Title||Organoiron polynorbornenes with pendent arylazo and hetarylazo dye moieties.|
|Author(s)||A. Abd-El-Aziz, R. Okasha, T. Afifi|
|Journal||Section Title: Chemistry of Synthetic High Polymers, Macromolecular Symposia|
|Issue||Organometallic and Coordination Clusters and Polymers|
|Abstract||Organoiron polynorbornene contg. arylazo or hetarylazo dye chromophores was prepd. via ring opening metathesis polymn. using Grubbs' catalyst. The obtained polymers were isolated as brightly colored materials and displayed good soly. in polar org. solvents. The colors of these polymers were affected by the nature of the incorporated azo chromophores. Thermogravimetric anal. of these materials showed that the cleavage of the cyclopentadienyliron (CpFe+) moieties was between 225 and 231 Â°C, while the degrdn. of the polymer backbones occurred between 400 and 450 Â°C. UV-vis studies in DMF showed that the organoiron polymers contg. arylazo dyes exhibit wavelength maxima around 425 nm. However, the replacement of these arylazo moieties with hetarylazo dyes displayed substantial bathochromic shifts in the Î»max values (â‰ˆ 511 nm). [on SciFinder(R)]|
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