Premium
A New Class of Cationic Organoiron Polynorbornenes Containing Azo Dyes
Author(s) -
AbdElAziz Alaa S.,
Okasha Rawda M.,
Afifi Tarek H.,
Todd Erin K.
Publication year - 2003
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200390019
Subject(s) - norbornene , cationic polymerization , azobenzene , chemistry , polymer chemistry , ring opening metathesis polymerisation , bathochromic shift , polymerization , metathesis , monomer , thermogravimetric analysis , grubbs' catalyst , polymer , organic chemistry , physics , quantum mechanics , fluorescence
Ring‐opening metathesis polymerization of novel organoiron norbornene monomers functionalized with azobenzene chromophores using the Grubbs catalyst resulted in the production of the corresponding cationic organoiron polynorbornenes. UV‐vis analysis of the organometallic polymers in DMF showed maxima from 420–430 nm, and upon acidification a bathochromic shift to 510–520 nm was observed. Cyclic voltammetric studies showed that the iron centers underwent reversible reduction steps between −1.2 and −1.4 V. Thermogravimetric analysis of the organoiron polymers showed two weight loss steps from 225 to 255 °C and from 400 to 510 °C. Differential scanning calorimetry showed that the cationic organoiron polynorbornenes had glass transition temperatures ( T g ) between 145 and 178 °C, while the T g values of their organic analogs occurred between 99 and 104 °C.