Infrared and Raman spectra, conformational stability, vibrational assignment, and ab initio calculations of 2-bromo-3-chloropropene

Preparation and Strongly Enhanced Visible Light Photocatalytic Activity of TiO2 Nanoparticles Modified by Conjugated Derivatives of Polyisoprene

“…The peaks at the range from 2800 to 3200 cm −1 are attributable to the C−H stretching mode in which the peak assigned to C−H stretch is at a higher wavenumber than 3000 cm −1 and the wavenumber of the peak of the CH 2 stretch is lower than 3000 cm −1 . 38,39 As shown in Scheme 1, there are relatively more C−H groups and fewer CH 2 groups on the molecular chain of CDPIP compared with polyisoprene or brominated polyisoprene, so the corresponding wavenumber of the C−H stretch of CDPIP shifts from 2929 to 3053 cm −1 . Meanwhile, an intensity enhancement and a wavenumber shift for the peak of CC double bonds in CDPIP (Figure 5c) as compared with PIP (Figure 5a) can be observed also.…”