Journal
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
Volume 20, Issue 3, Pages 592-603Publisher
SPRINGER
DOI: 10.1007/s10904-010-9393-2
Keywords
Star-shaped; Organoiron; Azo dye; Ferrocene cyclopentadienyliron; Arene complexes; Substitution reaction
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of British Columbia, Okanagan
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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 (lambda (max) = 435 and 427 nm, respectively) show bathochromic shifts (lambda (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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