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.
Color of C3G (A0) and its derivative (A1) solutions in ammonia; UV–Vis spectra of C3G (B0) and its derivatives (B1) in NH3 gas environment; schematic operating mode of C3G and acylated C3G as colorimetric indicators (C). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
