An official website of the United States government
Here's how you know
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.
(a) Absorption and (b) emission spectra of pyridine 1 (solid line), LDS 798 (dotted line) and rose bengal (dashed line) in water. Rose bengal solution contained 5 M potassium iodide. Arrows indicate the observation wavelengths.