Synthesis and Properties of Poly(10-Octylphenothiazine-CO-2′,3′,6′,7′-Tertrakis-Octyloxy-9-Spirobifluorene) for OLEDs
摘要:
Many attempts have been focused on polymer light-emitting diodes ( PLEDs) for large area display application. We report synthesis and properties of new phenothiazyl polymer derivatives, Poly(10-octyl-10H-phenothiazine-3,7-diyl) ( POP), Poly( 20,30,60,70-tertrakis-octyloxy-9-spirobifluorene-2,7-diyl) ( PTOSF), and their random copolymers, Poly( 10-octylphenothiazine-co-20,30,60,70- tertrakis-octyloxy-9-spirobifluorene) ( POTOSF), which were polymerized by Yamamoto reaction. The obtained compound was identified by H-1- NMR, UV- Visible spectroscopy and GPC data. Weight average molecular number ( Mn) of the polymers ranged from 17,000 to 300,000 g= mol with polydispersity indices of 1.6 similar to 6.5. Maximum UV-Visible absorption of the polymers was distributed from 285 to 403 nm. PL emission of POP, PTOSF and POTOSF copolymer were found to be 480, 434 and 484 nm, respectively. EL emission peak of double- layer EL device of POTOSF was at 494nm ( bluish green).
prepared from 3,4-dialkoxyphenylbromides 2. Complexation with metal salts MX (M = Na, Cs) afforded the corresponding derivatives MX5. The uncomplexed crown ethers 5 h and 5 i, with dodecyloxy and tetradecyloxy side chains, respectively, exhibit liquid crystalline properties. In the series of complexed crown ethers, liquid crystal properties appeared as early as NaI5 f with C9H19 side chains. Whereas the
The synthesis of Sulfur‐hybridized pyracylenes (SHPs) was reported. Quantitatively debromination and phenyl ring‐shift‐mediated rearrangement induced by the substituents were observed. A retrosynthetic method was successfully adopted to confirm the unexpected reaction results in rearrangement of Scholl reaction.
Synthesis of Substituted Dibenz[<i>a</i>,<i>c</i>]anthracenes and an Investigation of Their Liquid-Crystalline Properties
作者:Katie M. Psutka、Joshua Williams、Joseph A. Paquette、Oliver Calderon、Kevin J. A. Bozek、Vance E. Williams、Kenneth E. Maly
DOI:10.1002/ejoc.201403504
日期:2015.3
We report the synthesis of a series of 2,3,5,6-tetraalkoxydibenz[a,c]anthracenes bearing substituents (H, OCH3, or CN) in the 11- and 12-positions and an investigation of their liquid-crystalline properties. The synthesis involved Suzuki coupling of the appropriate dibromonaphthalene and boronate ester, followed by an oxidative cyclization. Compounds 4 and 5, bearing OCH3 and H, respectively, do not
Liquid Crystals Based on the N-Phenylpyridinium Cation—Mesomorphism and the Effect of the Anion
作者:Jordan D. Herod、Duncan W. Bruce
DOI:10.3390/molecules26092653
日期:——
ionic, tetracatenar mesogens are described based on a rigid, N-phenylpyridinium core, prepared as their triflimide, octyl sulfate and dodecyl sulfate salts for a range of terminal chain lengths. The mesomorphism of the individual series is described before a comparison is drawn between the different families and then more broadly with (i) neutral tetracatenar materials and (ii) related bis(3,4-dialkoxy
Soluble Graphene Nanoribbons from Planarization of Oligophenylenes
作者:Choong Ping Sen、Suresh Valiyaveettil
DOI:10.1002/chem.201604778
日期:2017.1.31
A solution‐based chemical synthesis of two graphenenanoribbons with armchair edges is reported. The precursor oligophenylene molecules are synthesized and subjected to oxidative cyclodehydrogenation to afford the target molecules, G‐1 and G‐2. These molecules have good solubility in organic solvents, and show a large redshift in their absorption edge (up to 185 nm) and emission maximum (up to 125 nm)