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.
Absorption (a, c) and fluorescence (b, d) spectra of porphyrins 3 (black), 4 (red), 5 (purple), 6 (pink), 7 (green), and 8 (blue) in DMF at room temperature