Sun, Ming-Li published the artcileDimeric SFX host materials for red, green and blue phosphorescent organic light-emitting devices, Name: Spiro[fluorene-9,9′-xanthene], the publication is Synthetic Metals (2014), 321-327, database is CAplus.
Two novel spiro[fluorene-9,9′-xanthene]-based derivatives 23’ODSFX and 3’3’ODSFX, without possessing conventional hole- or electron-transporting units, have been synthesized by a simple reaction procedure and been demonstrated to be host materials for efficient and low-voltage blue, green and red phosphorescent organic light-emitting devices (PHOLEDs). They showed good thermal stability with high glass transition temperatures (Tg) at 210 °C for 23’ODSFX and 138 °C for 3’3’ODSFX. Compared with SFX-based devices, the performance of 23’ODSFX-based devices increased nearly 20 times, although the difference of HOMO/LUMO levels and triplet levels between dimeric SFX and SFX was very small. The blue PHOLEDs based on 23’ODSFX and 3’3’ODSFX exhibited the same low turn-on voltage of ∼2.6 V, and maximum current efficiency (CE) of 21.7/12.9 cd cd A-1, power efficiency (PE) of 19.5/11.5 lm W-1, and external quantum efficiency (EQE) of 11.9%/7.2%, resp. It was evident that the different position linkage in host materials was closely relative to the device performance.
Synthetic Metals published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C19H21N3O3S, Name: Spiro[fluorene-9,9′-xanthene].
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem