Novel ter(9,9-diarylfluorene)s were synthesized by a Suzuki-coupling reaction of 2-bromofluorene (1) and 2,7-fluorenediboronic ester derivatives (3) with high isolated yields (63-86%). The X-ray structure analysis ter(9,9'-spirobifluorene) (4aa) revealed that the conjugated chromophore adopts helical conformation. This conformation effectively releases steric interaction between fluorene moieties prevents inter-chromophore interactions. introduction aryl groups at C9 position was highly...

Bright & blue: A strategy for reducing metal-chelate internal strain enables the preparation of blue emitting iridium(III) carbene complexes (see picture; Ir red, N light blue, F green). The phosphorescent OLED fabricated from one these shows remarkable CIE coordinates (0.16, 0.13) and peak efficiencies 6.0 % photons per electron, 6.3 cd A−1, 4.0 lm W−1.

A series of new emissive group 11 transition metal d10-complexes 1–8 bearing functionalized 2-pyridyl pyrrolide together with phosphine ancillary such as bis[2-(diphenylphosphino)phenyl] ether (POP) or PPh3 are reported. The titled complexes categorized into three classes, i.e. Cu(I) (1–3), Ag(I) (4 and 5), Au(I) (6–8). Via combination experimental theoretical approaches, the d10-metal ions versus their structural variation, stability, corresponding photophysical properties have been...

A new class of neutral bis-tridentate Ir(III) metal complexes that show nearly unitary red, green, and blue emissions in solution is prepared employed for the fabrication both monochrome white-emitting organic light-emitting diodes, among which a green device gives external quantum efficiency exceeding 31%.

Organic light-emitting diodes with external quantum efficiency of 38.8% are realized using a Pt-based thin-film emitting layer photoluminescence yield 96% and transition dipole ratio 93%. The orientation the thin films fabricated Pt complexes is investigated structural relationship between X-ray analysis structures in discussed based on chemical calculations. As service to our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may...

Rational design and syntheses of four iridium complexes (1-4) bearing two substituted quinoxalines an additional 5-(2-pyridyl) pyrazolate or triazolate as the third coordinating ligand are reported. Single-crystal X-ray diffraction studies 1 reveal a distorted octahedral geometry, in which dpqx ligands adopt eclipse configuration, for quinoxaline N atoms C orthometalated phenyl groups located at mutual trans- cis-positions, respectively. The lowest absorption band all consists mixture...

A highly robust metal-organic zeotype was created by expansion of the zeolite topology. The novel nanoporous material [Co5(im)10⋅2 MB]∞ (see structure) exhibits not only a zeolite-like topology, but also chemically functionalizable properties zeolites; im=imidazole, MB=3-methyl-1-butanol.

A series of heteroleptic Ir(III) metal complexes 1-3 bearing two N-phenyl-substituted pyrazoles and one 2-pyridyl pyrazole (or triazole) ligands were synthesized characterized to attain highly efficient, room-temperature blue phosphorescence. The N-phenylpyrazole ligands, dfpzH = 1-(2,4-difluorophenyl)pyrazole, fpzH 1-(4-fluorophenyl)pyrazole, dfmpzH 1-(2,4-difluorophenyl)-3,5-dimethylpyrazole, fmpzH 1-(4-fluorophenyl)-3,5-dimethylpyrazole, show a similar reaction pattern with respect the...

Two new for Ru: Unprecedented RuII sensitizers are coordinated by two tridentate ligands, a tricarboxyterpyridine, and dianionic bis(pyrazolyl)pyridine derivative with an extended π-conjugated auxochrome (see picture, Ru magenta, N blue, O red, F green, S yellow, C gray). This generation of thiocyanate-free offers solar conversion efficiency in dye-sensitized cells up to η=10.7 %. Detailed facts importance specialist readers published as ”Supporting Information”. Such documents...

A structural isomer of the core chromophore (p-HBDI) in green fluorescence protein, o-HBDI, is synthesized. o-HBDI possesses a seven-membered-ring hydrogen bond, from which excited-state intramolecular proton transfer takes place, resulting remarkable tautomer emission ∼605 nm.

True-blue Ir(III) phosphors are designed, synthesized, and applied to multilayered organic true-blue-light-emitting diodes with CIEx,y color chromaticity of (0.15,0.11) maximum external quantum efficiency ∼12%, demonstrating unprecedented performance among all blue-phosphorescent OLEDs ever documented. The molecular-design strategy subsequent device-fabrication protocol reveal a major development in OLEDs. Detailed facts importance specialist readers published as "Supporting Information"....

Two neutral pyrazolato diimine rhenium(I) carbonyl complexes with formula [Re(CO)(3)(N-N)(btpz)] where N-N = 2,2'-bipyridine (1) and 1,10-phenanathroline (2), btpz 3,5-bis(trifluoromethyl) pyrazolate, were synthesized characterized by elemental analysis, routine spectroscopic methods, single-crystal X-ray diffraction study. Ground excited state properties of these investigated steady-state time-resolved spectroscopies. Complexes 1 2 show photoluminescent emission in both solution solid-state...

A new series of luminescent platinum(II) azolate complexes with a formula [Pt(N∧N)2], in which N∧N = mppz (1), bppz (2a), bzpz (2b), bmpz (2c), bqpz (2d), fppz (3a), hppz (3b), bptz (4), hptz (5), were synthesized, and their photophyscial properties examined. Single-crystal X-ray diffraction studies 2c 3b revealed planar molecular geometry, the chelates adopt trans configuration show notable interligand C−H···N hydrogen bonding within complex. Interesting intermolecular interactions observed...

The shortest metal–metal bond so far is found in complex anion 2 (CrCr 1.7397(9) Å), which the one-electron reduction product of thermally stable mixed-valent 1 (see scheme). Experimental data unambiguously show that electronic configuration σ2π4δ3, and theoretical studies confirm presence a CrCr quintuple 2. Ar=2,6-C6H3(CH3)2. Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z801286_s.pdf or from author. Please note: publisher...

Abstract A new series of charge neutral Os(II) isoquinolyl triazolate complexes ( 1 – 4 ) with both trans and cis arrangement phosphine donors are synthesized, their structural, electrochemical photophysical properties established. In sharp contrast to the ‐arranged 2 , derivative which shows a planar chromophoric N ‐substituted chelates, offers most effective extended π ‐delocalization hence lowest excited state energy gap. These exhibit phosphorescence peak wavelengths ranging from 692–805...

Closer than most: A series of four dichromium bis(amidinate) complexes the type [Cr2{μ-η2-ArNC(R)NAr}2] display an extremely short metal–metal bond 1.74 Å, independent steric hindrance ligands. DFT calculations CrCr lengths agree well with experimental values and computational analysis their electronic structures indicates quintuple bonding between two Cr centers. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not...

Nickel′s eleven: A metal chain consisting of four dinuclear mixed-valent Ni23+ units linked together by three square-planar Ni2+ has been prepared (see picture the real molecular model in lobby chemistry building at National Taiwan University). The electronic and magnetic properties this linear complex containing 11 nickel atoms are reported. Detailed facts importance to specialist readers published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset....

Toss the F: A new series of IrIII complexes functionalized with pyridyltriazolate chromophores and a tripodal dicyclometalated phosphite achieved highly efficient blue phosphorescence without employing any fluorine substituents. OLEDs dopant [Ir(P C2)(bptz)(PMe2Ph)] (see structure; bptz=3-tert-butyl-5-(2-pyridyl)-1,2,4-triazolate; P C2=dicyclometalated tripod) show outstanding performance. Detailed facts importance to specialist readers are published as "Supporting Information". Such...

Emissive Ir(III) metal complexes possessing two tridentate chelates (bis-tridentate) are known to be more robust compared those with three bidentate (tris-bidentate). Here, the deep-blue-emitting, bis-tridentate phosphors bearing both dicarbene pincer ancillary such as 2,6-diimidazolylidene benzene and 6-pyrazolyl-2-phenoxylpyridine chromophoric chelate synthesized. A deep-blue organic light-emitting diode from one phosphor exhibits Commission Internationale de l'Eclairage (CIE(x,y) )...

Abstract Panchromatic Ru II sensitizers TF‐30–TF‐33 bearing a new class of 6‐quinolin‐8‐yl‐2,2′‐bipyridine anchor were synthesized and tested under AM1.5 G simulated solar irradiation. Their increased π conjugation relative to that the traditional 2,2′:6′,2′′‐terpyridine‐based led remarkable improvement in absorptivity across whole UV–Vis–NIR spectral regime. Furthermore, introduction bulky tert ‐butyl substituent on quinolinyl fragment not only an increase J SC value owing suppression dye...

The high-performance Y6-based nonfullerene acceptors (NFAs) feature a C-shaped A-DA'D-A-type molecular architecture with central electron-deficient thiadiazole (Tz) A' unit. In this work, we designed and synthesized new A-D-A-type NFA, termed CB16, having ortho-benzodipyrrole-based skeleton of Y6 but the Tz unit eliminated. When processed nonhalogenated xylene without using any additives, binary PM6:CB16 devices display remarkable power conversion efficiency (PCE) 18.32% high open-circuit...

Bioassay-directed fractionation of an EtOH extract Curcuma zedoaria led to isolation active curcuminoid, which was identified as demethoxycurcumin (2) by comparison its 1H and 13C NMR spectra with literature data direct synthetic material. Curcumin (1) bisdemethoxycurcumin (3) were also obtained. Curcuminoids (1-3) synthesized demonstrated be cytotoxic against human ovarian cancer OVCAR-3 cells. The observed CD50 values 1, 2, 3 4.4, 3.8, 3.1 microg/mL, respectively. Three additional novel...

Both anti–anti–anti–anti and syn–syn–syn–syn conformations of the bound metal ions are possible with new ligand N,N′-bis(α-pyridyl)-2,6-diaminopyridine (H2tpda). Pentanuclear CoII NiII complexes accessible this (see sketch on right). The chain is helically wrapped by four all-syn tpda ligands.

The nonionic, red-emitting complexes [Os(fppz)2L2] (L = PPh2Me (1), PPhMe2 (2)) and [Os(bptz)2L2] (3)) were synthesized, showing highly intense red phosphorescent emission in CH2Cl2 solution at λmax 617, 632, 649 nm, respectively. electroluminescent properties of these compounds on OLEDs showed promising device efficiencies required for future OLED applications.

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTMetal String Complexes: Synthesis and Crystal Structure of [Ni4(μ4-phdpda)4] [Ni7(μ7-teptra)4Cl2] (H2phdpda = N-Phenyldipyridyldiamine H3teptra Tetrapyridyltriamine)Shie-Yang Lai, Tzu-Wei Lin, Yu-Hua Chen, Chih-Chieh Wang, Gene-Hsiang Lee, Ming-hwa Yang, Man-kit Leung, Shie-Ming PengView Author Information Department Chemistry, National Taiwan University Taipei, Cite this: J. Am. Chem. Soc. 1999, 121, 1, 250–251Publication Date (Web):December...