Structure of the iodine columns in iodinated nylon‐6

A study of iodine‐complexed nylon 6 films by polarized resonance Raman spectra shows the presence of both I3− and I5− species, the latter most likely in the form of an I2/I3− complex. Polarization characteristics of the Raman spectra show that the I2/I3 units are orinted along the polymer chain and the I3− ions are perpendicular to the chain axis. The I2/I3− units are in a more stable moiety than the I3− species. These Raman results are consistent with the x‐ray diffraction data.