US Patent Issued to Arizona Board of Regents on behalf of Arizona State University on Oct. 21 for "Blue phosphorescent emitters employing functionalized imidazophenthridine and analogues" (Arizona Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,405, issued on Oct. 21, was assigned to Arizona Board of Regents on behalf of Arizona State University (Scottsdale, Ariz.).

"Blue phosphorescent emitters employing functionalized imidazophenthridine and analogues" was invented by Jian Li (Tempe, Ariz.) and Linyu Cao (Tempe, Ariz.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A series of functionalized imidazophenthridine analogue-based blue phosphorescent emitters have been designed, where bulky substituents (e.g., tetrabutyl, phenyl, mesityl, triisopropylbenzene, etc.) are introduced on an imidazophenthridine fragment of the emitters. Bulky substituents may suppress potential excimer formation, as...