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  Indian J Med Microbiol
 

Figure 3: Solid-state13C nuclear magnetic resonance spectroscopic results[12] for 1,4-cis-polyisoprene with different doping levels (y = molar concentration) of iodine. (a) Corresponds to undoped state. (b-d) Correspond to polymer with increasing molar concentration of iodine. The resonances corresponding to the double-bonded carbon atoms (α and β) decrease in intensity with doping due to formation of radical cations. Formation of any conjugation upon doping is ruled out since double-bond concentration decreases with doping. The carbon atoms in the radical cations contribute to the resonance peaks around the aliphatic carbons (γ, δ, and ε)

Figure 3: Solid-state13C nuclear magnetic resonance spectroscopic results<sup>[12]</sup> for 1,4-cis-polyisoprene with different doping levels (y = molar concentration) of iodine. (a) Corresponds to undoped state. (b-d) Correspond to polymer with increasing molar concentration of iodine. The resonances corresponding to the double-bonded carbon atoms (α and β) decrease in intensity with doping due to formation of radical cations. Formation of any conjugation upon doping is ruled out since double-bond concentration decreases with doping. The carbon atoms in the radical cations contribute to the resonance peaks around the aliphatic carbons (γ, δ, and ε)