Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
2D-IR spectra of acyl-proline-NH2, in (a) D2O, showing diagonal peaks at 1,620 and 1,670 cm−1, and (b) chloroform, which shows similar diagonal peaks, but also off-diagonal peaks. Because of the anharmonicity, the ellipses are not pointing exactly along the diagonal.
