Sulfonated, water-soluble imidazolium and imidazoliniumsalts were synthesized and the respective Pd-complexes with N,N'-bis(2,6-dialkyl-4-SO(3)(-)-phenyl)imidazol-2-ylidene and N,N'-bis(2,6-dialkyl-4-SO(3)(-)-phenyl)-4,5-dihydroimidazol-2-ylidene ligands were applied in aqueous Suzuki coupling reactions of aryl chlorides.
Sulfonated N-Heterocyclic Carbenes for Pd-Catalyzed Sonogashira and Suzuki-Miyaura Coupling in Aqueous Solvents
作者:Sutapa Roy、Herbert Plenio
DOI:10.1002/adsc.200900886
日期:——
of the respective disulfonated N‐heterocyclic carbene (NHC) precursors in reasonable yields (46–77%). Water‐soluble palladium catalyst complexes, in situ obtained from the respective sulfonated imidazolinium salt, sodium tetrachloropalladate (Na2PdCl4) and potassium hydroxide (KOH) in water, were successfully applied in the copper‐free Sonogashiracoupling reaction in isopropyl alcohol/water mixtures
Highly Efficient Suzuki–Miyaura Coupling of Heterocyclic Substrates through Rational Reaction Design
作者:Christoph A. Fleckenstein、Herbert Plenio
DOI:10.1002/chem.200701877
日期:2008.5.9
the presence of 0.5 mol % of catalyst, and S-heterocyclic aryl chlorides and aryl- or 3-pyridylboronic acids required 0.01-0.05 mol % Pd catalyst for full conversion. The key to the high activity of the Pd-phosphine catalyst is the rationaldesign of the reaction parameters (i.e., the presence of water in the reaction mixture, good solubility of reactants and catalyst in n-butanol/water (3:1), and
Cyclometalated Platinum(II) Complexes of Lepidine-Based Ligands as Highly Efficient Electrophosphors
作者:Marappan Velusamy、Chih-Hsin Chen、Yuh S. Wen、Jiann T. Lin、Chao-Chen Lin、Chin-Hung Lai、Pi-Tai Chou
DOI:10.1021/om100573r
日期:2010.9.13
and redox potentials of the cyclometalated phenyl ring of the complexes are discussed. Complexes 1−7 are highly phosphorescent in fluid as well as in solid state, covering a rather broad spectral range from yellow to saturated red. These complexes were successfully used as a dopant material to fabricate the electroluminescent device, ITO/NPB (40 nm)/CBP-doped Pt complex (5 wt %) (20 nm)/BCP (10 nm)/Alq3
一系列新的含lepidine-配体为基础的环金属化铂(II)配合物1 - 7与通式[PT(L)ACAC](L =基于lepidine配体,ACAC =乙酰丙酮化物)已经被合成。配合物已使用光谱和电化学技术进行了表征。配合物2和5的单晶X射线结构已成功确定。讨论了取代基对配合物环金属化苯环的电子特征和氧化还原电势的影响。配合1 - 7在液体和固态中均具有高磷光性,覆盖从黄色到饱和红色的相当宽的光谱范围。这些配合物已成功用作掺杂材料,以制造电致发光器件,ITO / NPB(40 nm)/掺杂CBP的Pt配合物(5 wt%)(20 nm)/ BCP(10 nm)/ Alq 3(20 nm) / LiF(1 nm)/ Al(150 nm),表现出非常有前途的性能。掺杂有5 wt%3的器件产生的最大外部量子效率为15.2%,最大亮度为26847 cd m -2,对应的发光效率为29.83 cd A -1。
Light-emitting element and iridium complex
申请人:Cheng Chien-Hong
公开号:US20050025995A1
公开(公告)日:2005-02-03
Iridium compounds having at least two 2-arylpyridine ligands in which a non-hydrogen atom group is substituted at the 4-position of the pyridine ring, and light-emitting elements comprising on organic layer comprising at least one of the iridium compounds are disclosed.