Toward High Molecular Weight Triphenylamine-Based Hyperbranched Polymers
摘要:
Two kinds of triphenylamine-containing AB(2) monomers carrying or not carrying flexible alkyl chains were synthesized and fully characterized. One-pot Suzuki polycondensation (SPC) was applied to polymerize these monomers to prepare hyperbranched polymers. Hyperbranched polymers from AB(2) monomer not carrying alkyl chains exhibited poor solubility in common organic solvents such as THF, chloroform, toluene, etc. The poor solubility of the hyperbranched polymers hampered their applications and the further modification of the end groups. The introduction of difunctional core molecules, such as 9,9-dioctylfluorene and 9,9-dioctylfluorene trimer, in the polymerization process controlled the molecular weight and forced the hyperbranched copolymers soluble in common organic solvents mentioned above, but high molecular weight polymers could not be obtained. SPC of the AB2 monomers carrying flexible alkyl chains afforded high molecular weight fluorene-triphenylamine (F-TPA) alternating hyperbranched copolymers, which are fully soluble in common organic solvents, and their peripheral bromo functional groups can be further modified. The structures of the hyperbranched polymers were fully characterized by NMR, GPC, and combustion analysis. Initial studies on the thermal and the optical properties of the hyperbranched polymers were also reported.
Bipolar fluorophores based on intramolecular charge-transfer moieties of sulfone for nondoped deep blue solution-processed organic light-emitting diodes
作者:Liang Cao、Lei Zhang、Qiang Wei、Jiasen Zhang、Dongjun Chen、Sheng Wang、Shi-jian Su、Tao Wang、Ziyi Ge
DOI:10.1016/j.dyepig.2020.108242
日期:2020.5
Dipolar emitters exhibited excellent performance in organiclight-emittingdiode (OLED). However, these molecules had intramolecular charge-transfer (ICT) properties, which posed challenge to obtain deepblue emission. In this study, three fluorophores were designed by introducing carbazole and diphenylamine as electron donors and sulfone as electron acceptor due to their mild charge-accepting properties
Electron transport agents for organic electronic devices
申请人:3M Innovative Properties Company
公开号:US20040214036A1
公开(公告)日:2004-10-28
Compounds and compositions are provided that can be used as electron transport agents in organic electronic devices such as organic electroluminescent devices. The compounds are non-polymeric and have an aromatic core conjugated to end capping groups. The aromatic core contains a phenylene group arylene or naphthalene group arylene having a pendant heteroaryl group that includes a —C═N— unit.
ELECTRON TRANSPORT AGENTS FOR ORGANIC ELECTRONIC DEVICES
申请人:Bentsen G. James
公开号:US20080026135A1
公开(公告)日:2008-01-31
Compounds and compositions are provided that can be used as electron transport agents in organic electronic devices such as organic electroluminescent devices. The compounds are non-polymeric and have an aromatic core conjugated to end capping groups. The aromatic core contains an arylene group having a pendant heteroaryl group that includes a —C═N— unit.