| abstract |
The present invention provides a composition. In one embodiment, a composition is provided and comprises Compound 1 as set forth below: For compound 1 , R1 to R24 are the same or different. R 1 to R 24 are each independently selected from the group consisting of hydrogen, unsubstituted hydrocarbyl, substituted hydrocarbyl, cyano, alkoxy, aryloxy, and NR' 2 . R' is hydrogen or hydrocarbyl; wherein two or more of adjacent R to R can optionally form one or more ring structures. Component Z is selected from the group consisting of group Z-1, group Z-2, group Z-3, group Z-4, group Z-5, group Z-6 shown below and the group Z-7: the group Z-1 Group Z‑2 Group Z-3 Group Z‑4 Group Z‑5 Group Z‑6 and the group Z‑7 For compound 1, one or more hydrogen atoms can optionally be replaced by deuterium. |