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.
UV/vis spectra of fluorescent dye (4-methoxyl-N-(2-hydroxy-1-hydroxymethylethyl)-1,8-naphthalimide (MHHNA), 4-diethylamino-N-(2-hydroxy-1-hydroxymethylethyl)-1,8-naphthalimide (DHHNA)) and corresponding fluorescent polyurethane (PU) prepolymer in ethyl acetate solution.
