- Rational Design and Synthesis of a Highly Porous Copper-Based Interpenetrated Metal-Organic Framework for High CO2 and H2 Adsorption
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Interpenetrated metal-organic frameworks (MOFs) are often observed to show lower porosity than their non-interpenetrating analogues. It would be highly desirable if the interpenetrated MOFs could still provide high stability, high rigidity, and optimal pore size for applications. In this work, an asymmetrical tricarboxylate organic linker was rationally designed for the construction of a copper(II)-based microporous MOF with a twofold interpenetrated structure of Pt3O4 topology. In spite of having structural interpenetration, the activated MOF shows high porosity with a Brunauer-Emmett-Teller surface area of 2297 m2g-1, and high CO2 (15.7 wt% 273 K and 1 bar) and H2 uptake (1.64 wt% 77 K and 1 bar). Playing with symmetry: A C2-symmetric tricarboxylate organic linker with elongated arms has been developed for the construction of a twofold interpenetrated metal-organic framework. Despite its structural interpenetration, the framework exhibits high surface area and high adsorption capability for CO2 and H2 (1.64 wt% at 77 K and 1 bar).
- Bose, Purnandhu,Bai, Linyi,Ganguly, Rakhesh,Zou, Ruqiang,Zhao, Yanli
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- HIGH GLASS TRANSITION TEMPERATURE "MEDIUM-SIZED" AMBIPOLAR HOST MATERIALS
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Disclosed herein are am bipolar host compounds represented by formula (I), wherein: a) R4 is an optionally substituted aryl or an optionally substituted heteroaryl group; b) n is at least 2; e) for each (ii) at least one of R1, R2 and R3 is independently an optionally substituted carbazole group, and the remaining of R1, R2 and R3 are independently selected from hydrogen, halogen and a C1-20 organic group: and d ) Y is selected from (III), wherein R5 is an.optionally substituted aryl group, an optionally substituted heteroaryl group, an optionally substituted alkyl group or an optionally substituted heteroalkyl group, and wherein R6 is hydrogen,, an optionally substituted aryl group, an optionally substituted heteroaryl group, an optionally substituted alkyl -group or an optionally substituted heteroalky! group. The compounds can be used in OLED devices and are ambipolar. The OLED devices can show high efficiency and high luminance.
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- CARBAZOLE SUBSTITUTED TRIAZOLE, TRIAZINE, AND TETRAZINE AMBIPOLAR HOST MATERIALS AND DEVICES
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Disclosed herein are ambipolar host compounds represented by formula (I): (I), wherein: a) at least one of the R1, R2 and R3 groups is an optionally substituted carbazole group, and the remaining of R1, R2 and R3 are independently selected from hydrogen, halogen and a C1-20 organic group; b) R4 is an optionally substituted alkyl group, an optionally substituted heteroalkyl group, a substituted aryl group comprising at least one heteroatom in the substituent, or an optionally substituted heteroaryl group; and c) Y is selected from, and, wherein R5 is an optionally substituted aryl group, an optionally substituted heteroaryl group, an optionally substituted alkyl group or an optionally substituted heteroalkyl group, and wherein R6 is hydrogen, an optionally substituted aryl group, an optionally substituted heteroaryl group, an optionally substituted alkyl group or an optionally substituted heteroalkyl group. The compounds can be used in OLED devices.
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Page/Page column 19
(2014/02/15)
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- Carbazole-based hole transport and/or electron blocking materials and/or host polymer materials
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This invention relates generally to norbornene-monomer, poly(norbornene)homopolymer, and poly(norbornene)copolymer compounds containing a functionalized carbazole side chain, having desirable solution processability and host characteristics. It also relates to hole transport and/or electron blocking materials, and to organic host materials for an organic luminescence layer, an OLED device, and compositions of matter which include these compounds.
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- CARBAZOLE-BASED HOLE TRANSPORT AND /OR ELECTRON BLOCKING MATERIALS AND /OR HOST POLYMER MATERIALS
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This invention relates generally y to norbornene -monomer, poly (norbornene) homopolymer, and poly (norbornene) copolymer compounds containing a functionalized carbazole side chain, having desirable solution processability and host characteristics. It also relates to hole transport and/or electron blocking materials, and to organic host materials for an organic luminescence layer, an OLED device, and compositions of matter which include these compounds.
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Page/Page column 57-58
(2009/07/25)
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- Dirhodium(II) tetrakis(perfluoroalkylbenzoates) as partially recyclable catalysts for carbene transfer reactions with diazoacetates
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Three highly fluorinated dirhodium(II) tetrakis(benzoates), [Rh2(O2CRF)4, RF=C6H4-4-C6F13 (3) and C6H3-3,5-di(CnF2n+1) (n=6: 4; n=8: 5)], have been prepared and characterized. Only 4 and 5 are suited for applications in fluorous synthesis due to their excellent solubility in fluorous solvents. They were found to catalyze the following carbenoid reactions of diazo compounds in the fluorous solvents 1,1,2-trichloro-1,2,2-trifluoroethane and perfluoro(methylcyclohexane): cyclopropanation of styrenes using methyl diazoacetate, intermolecular carbene C-H insertion into hexane with methyl diazoacetate, and intramolecular aromatic C-H insertion of an α-diazo-β-ketoester. Except for the second reaction type, the catalyst could be recovered to a high extent by a liquid-liquid extraction (fluorous solvent - dichloromethane) due to its preference for the fluorous solvent. For the cyclopropanation reactions, the recovered catalyst was used in four subsequent reaction/workup cycles without significant loss of activity. In contrast, the catalyst could not be recovered from the carbenoid C-H insertion reaction with hexane; apparently, some by-products of this sluggish reaction, such as carbene dimers and oligomers, caused the deactivation or destruction of the catalyst.
- Endres, Andreas,Maas, Gerhard
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p. 3999 - 4005
(2007/10/03)
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- Synthetic studies on dendritic glycoclusters: A convergent palladium-catalyzed strategy
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A facile Pd-catalyzed strategy by which multiantennary glycoclusters and sugar dendrons can be readily assembled in one-step is described.
- Sengupta, Saumitra,Sadhukhan, Subir Kumar
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p. 215 - 219
(2007/10/03)
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- Design, synthesis, and photodynamics of light-harvesting arrays comprised of a porphyrin and one, two, or eight boron-dipyrrin accessory pigments
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Light-harvesting arrays containing one, two, or eight boron-dipyrrin (BDPY) pigments and one porphyrin (free base or Zn chelate) have been synthesized using a modular building block approach. The reaction of pyrrole and 4-(BDPY)benzaldehyde or 3,5-bis(BDP
- Li, Feirong,Yang, Sung Ik,Ciringh, Yangzhen,Seth, Jyoti,Martin II, Charles H.,Singh, Deepak L.,Kim, Dongho,Birge, Robert R.,Bocian, David F.,Holten, Dewey,Lindsey, Jonathan S.
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p. 10001 - 10017
(2007/10/03)
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