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) Structure of [Cr(ddpd)2]3+. (b) Design principle of molecular rubies: by increasing the ligand-field splitting (LFS) in octahedral chromium(III) complexes, back-intersystem crossing (ISC) from the low-lying 2E + 2T1 to the 4T2 states at larger chromium–ligand bond lengths and subsequent nonradiative relaxation to the 4A2 ground state is quenched, resulting in increasing luminescence yield. The gray arrows denote the effect of increased LFS.
