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Design of Star-Shaped Organoiron Oligomers with Azo Dye Bridges

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Abstract

A series of star-shaped macromolecules bearing distinct symmetrical branches with alternating organoiron complexes and azobenzene moieties were synthesized using both convergent and divergent approaches. The various azo dye and organoiron-containing branches were reacted with multifunctional cores via metal-mediated nucleophilic aromatic substitution and ester condensation reactions to afford multi-substituted three- and four-arm star-shaped oligomers. UV–vis spectral studies of complexes 15 and 22 (λ max = 435 and 427 nm, respectively) show bathochromic shifts (λ max = 576 and 558, respectively) at various HCl concentrations indicating their use as potential acid sensors. Cyclic voltammetric studies of the octa-iron oligomer 22 were reversibly reduced at E 1/2 = −1.53 V.

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Acknowledgements

Financial support was provided by the Natural Sciences and Engineering Research Council of Canada (NSERC) and the University of British Columbia, Okanagan and is gratefully acknowledged. We would also like to thank Professor Edward G. Neeland for his invaluable contribution to this article.

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Author notes

  1. Rawda M. Okasha & Tarek H. Afifi

    Present address: Department of Chemistry, Taibah University, Medina, Saudi Arabia

Authors and Affiliations

  1. Department of Chemistry, The University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, V1V 1V7, Canada

    Alaa S. Abd-El-Aziz, Elizabeth A. Strohm, Man Ding, Rawda M. Okasha, Tarek H. Afifi, Sibel Sezgin & Paul R. Shipley

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  1. Alaa S. Abd-El-Aziz
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  2. Elizabeth A. Strohm
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Correspondence to Alaa S. Abd-El-Aziz.

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This paper is dedicated to Professor Charles U. Pittman, Jr. in recognition of his outstanding contribution to the field of inorganic and organometallic polymers.

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Abd-El-Aziz, A.S., Strohm, E.A., Ding, M. et al. Design of Star-Shaped Organoiron Oligomers with Azo Dye Bridges. J Inorg Organomet Polym 20, 592–603 (2010). https://doi.org/10.1007/s10904-010-9393-2

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  • DOI: https://doi.org/10.1007/s10904-010-9393-2

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