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.
Structural representation of spiropyran-DO3A-Gd(III): Proposed isomerization of the compound, displaying the two conformational states: merocyanine (left) and spiropyran (right). Under dark conditions, spiropyran-DO3A is preferentially in the merocyanine (MC) form, whereas visible light illumination leads to isomerization to the spiropyran form (SP).
