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) Photoswitching of di-ortho-fluoro di-ortho-chloro azobenzene (8). UV–vis spectra of 8: (b) 50 μM in DMSO is used to show the full spectrum; (c) 500 μM in DMSO and 9:1 DMSO:H2O are used to visualize the extent of the n → π* band tails; and (d) X-ray structure of trans-8x and its calculated vertical excitation energy (TD-PBE0/def2-TZVP).
