Tri-, Tetra- and Pentamers of 9,9′-Spirobifluorenes through Full ortho-Linkage: High Triplet-Energy Pure Hydrocarbon Host for Blue Phosphorescent Emitter
- 11 November 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 12 (24) , 5648-5651
Abstract
4,4′-Dibromo-9,9′-spirobifluorene was first synthesized, and from this intermediate, three fully ortho-linked tri-, tetra-, and pentamers of 9,9′-spirobifluorenes were constructed. The full ortho-linkage impedes the π conjugation of fluorene units, and guarantees their high triplet energies (ET = 2.80 eV). A device with the trimer as the first pure hydrocarbon host material for blue phosphor FIrpic shows a maximum current efficiency of 25 cd/A.Keywords
This publication has 33 references indexed in Scilit:
- Diarylmethylene-bridged triphenylamine derivatives encapsulated with fluorene: very high Tg host materials for efficient blue and green phosphorescent OLEDsJournal of Materials Chemistry, 2010
- Spirobifluorene-Bridged Donor/Acceptor Dye for Organic Dye-Sensitized Solar CellsOrganic Letters, 2009
- Bridged triphenylamines as novel host materials for highly efficient blue and green phosphorescent OLEDsChemical Communications, 2009
- Highly Efficient Red Phosphorescent OLEDs based on Non‐Conjugated Silicon‐Cored Spirobifluorene Derivative Doped with Ir‐ComplexesAdvanced Functional Materials, 2009
- A Simple Carbazole/Oxadiazole Hybrid Molecule: An Excellent Bipolar Host for Green and Red Phosphorescent OLEDsAngewandte Chemie International Edition, 2008
- Comparison of Charge‐Carrier Transport in Thin Films of Spiro‐Linked Compounds and Their Corresponding Parent CompoundsAdvanced Functional Materials, 2006
- Efficient Organic Blue‐Light‐Emitting Devices with Double Confinement on Terfluorenes with Ambipolar Carrier Transport PropertiesAdvanced Materials, 2004
- Anodic oxidation of 9,9′-spirobifluorene in CH2Cl2+0.2 M Bu4NBF4. Electrochemical behaviour of the derived oxidation productSynthetic Metals, 1998
- Anomaly in palladium-catalyzed phenylethynylation of 2,2'-dihalobiphenyls: formation of alkylidenefluorenesThe Journal of Organic Chemistry, 1983
- The Higher Benzenoid Hydrocarbons. II. The Isomeric Bromofluorenones1Journal of the American Chemical Society, 1935