SPPO1;9,9-spirobifluoren-2-yl-diphenyl-phosphine oxide;9,9'-Spirobi[fluoren]-2-yldiphenylphosphine oxide;9,9'-Spirobi[fluoren]-7-yldiphenylphosphine oxide;Diphenyl-9,9'-spirobi[9H-fluoren]-2-ylphosphine oxide;SPPO1 , 9,9-spirobifluoren-2-yl-diphenyl-phosphine oxide;Phosphine oxide, diphenyl-9,9'-spirobi[9H-fluoren]-2-yl-;Diphenyl[9,9'-spirobi[9H-fluoren]-2-yl]phosphine Oxide (This product is only available in Japan.)
SPPO1, 9,9-Spirobifluoren-2-yl-diphenyl-phosphine oxide has a spirobifluorene structure with an electron deficient polar diphenyl-phosphine oxide moiety attached. The polarity in the P=O double bond can lead to a high triplet energy state, which is highly desirable in host materials for an efficient host-to guest energy transfer in an OLED.
