- Organic light emitting memory material and bistable OLED memory using the same
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The application discloses an organic light-emitting storage material and an organic double-stable light-emitting diode memory applying the same, and provides two organic light-emitting storage materials and which use OLED-structured light-emitting storage
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Paragraph 0034-0036
(2021/10/05)
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- Non-fullerene electron acceptor material and organic photovoltaic cell
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The invention provides a non-fullerene electron acceptor material represented by formula (I), and an organic photovoltaic cell having an active layer comprising the non-fullerene electron acceptor material. When the non-fullerene electron acceptor materia
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Paragraph 0058; 0062; 0071-0074
(2021/02/24)
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- Non-fullerene electron acceptor material and organic photovoltaic cell
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Disclosed are a non-fullerene electron acceptor material represented by formula (I) and an organic photovoltaic cell having an active layer comprising the aforementioned non-fullerene electron acceptor material. When the non-fullerene electron acceptor ma
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Paragraph 0032-0034
(2021/02/10)
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- Organic light-emitting material and OLED (organic LED) storage device applying same
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The invention provides an organic light-emitting material and a light-emitting storage device with OLED structure employing the material aforementioned. The OLED storage device herein has high brightness and good color stability, also has a WORM (write on
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Paragraph 0033-0035
(2019/08/07)
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- Synthesis of dilactone bridged terphenyls with crankshaft architectures
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Three highly fluorescent dilactone bridged terphenyls with crankshaft architectures have been synthesized. This general class of compounds is relatively unexplored. These compounds have been characterized by fluorescence and UV-vis spectroscopy. For all three compounds, a direct correlation between the rigidity of the terphenyl system and the strength of absorption and emission of light has been observed. Preliminary studies have indicated that compounds with this architecture have the potential to be useful as pH-driven molecular switches and/or sensors with instant fluorescence attenuation at high pH values.
- Dressler, Justin J.,Miller, Sarah A.,Meeuwsen, Brian T.,Riel, Asia Marie S.,Dahl, Bart J.
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supporting information
p. 283 - 292
(2015/02/02)
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- Ammonia capture in porous organic polymers densely functionalized with Bronsted acid groups
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The elimination of specific environmental and industrial contaminants, which are hazardous at only part per million to part per billion concentrations, poses a significant technological challenge. Adsorptive materials designed for such processes must be engendered with an exceptionally high enthalpy of adsorption for the analyte of interest. Rather than relying on a single strong interaction, the use of multiple chemical interactions is an emerging strategy for achieving this requisite physical parameter. Herein, we describe an efficient, catalytic synthesis of diamondoid porous organic polymers densely functionalized with carboxylic acids. Physical parameters such as pore size distribution, application of these materials to low-pressure ammonia adsorption, and comparison with analogous materials featuring functional groups of varying acidity are presented. In particular, BPP-5, which features a multiply interpenetrated structure dominated by A pores, is shown to exhibit an uptake of 17.7 mmol/g at 1 bar, the highest capacity yet demonstrated for a readily recyclable material. A complementary framework, BPP-7, features slightly larger pore sizes, and the resulting improvement in uptake kinetics allows for efficient adsorption at low pressure (3.15 mmol/g at 480 ppm). Overall, the data strongly suggest that the spatial arrangement of acidic sites allows for cooperative behavior, which leads to enhanced NH3 adsorption.
- Van Humbeck, Jeffrey F.,McDonald, Thomas M.,Jing, Xiaofei,Wiers, Brian M.,Zhu, Guangshan,Long, Jeffrey R.
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p. 2432 - 2440
(2014/03/21)
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- Novel alternating fluorene-based conjugated polymers containing oxadiazole pendants with various terminal groups
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A series of soluble alternating fluorene-based copolymers containing symmetrical and asymmetrical 1,3,4-oxadiazole (OXD) pendants with various terminal groups are synthesized by the palladium-catalyzed Suzuki coupling reaction. These polymers possess higher glass transition temperatures than that of the analogous dialkoxy-substituted polymer (PFPOC6) consisting of the same backbone without OXD pendants. The photophysical and electrochemical properties of these polymers are affected by the polar effect (electron-withdrawing group, -CN, and electron-donating group, -R or -OR) and the size effect (the size of the grafted side chain) of the OXD pendants. Owing to the large steric hindrance of OXD pendants, the aggregation of these polymers in solids is reduced, which results in almost identical PL emissions in both solution and solid states. The bulky OXD pendants on the polymer side chains can provide the polymer films with lower HOMO and LUMO energy levels and better electron injection property. Since only one emission peak is observed in both PL and EL spectra of these polymers, it is evidenced that effective energy transfer from the OXD pendants to the conjugated polymer backbones has occurred, thus eliminating the light emission from the OXD pendants. These asymmetrical OXD-substituted polymers have higher quantum yields and less aggregation in the solid state than the symmetrical OXD-substituted polymers. The symmetrical OXD-substituted polymer (P1) has a longer PL emission wavelength than the asymmetrical OXD-substituted polymers (P2-P8), which may be due to the improvement of the coplanarity between the polymer backbone and the symmetrical OXD pendants and/or the introduction of two electron-withdrawing OXD pendants.
- Sung, Hsiao-Hsien,Lin, Hong-Cheu
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p. 7945 - 7954
(2007/10/03)
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- Imine-bridged planar poly(p-phenylene) derivatives for maximization of extended π-conjugation. The common intermediate approach
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Described are two approaches to planar conjugated poly(p-phenylene) (PPP) derivatives. The first approach, involving lactam bridges, was unsuccessful due to the insolubility of the 6(5H)-phenanthridinonyl moieties. The second approach, which utilized imine bridges, worked excellently since the compounds were generally soluble and the bridge formations were highly efficient. The main PPP backbone was synthesized via Pd(0)-catalyzed coupling of an arylbis(boronic ester) with an aryl dibromide. Imine bridges, which are formed by exposure of the polymer to trifluoroacetic acid or HCl, force the consecutive units into planarity. The bridging units are sp2 hybridized, thus allowing for greater π-electron flow between the consecutive phenyl units. The polymers, upon planarization, exhibit enormous bathochromic shifts of 210-240 nm. The optical spectra of the planar systems are compared to that of the parent nonplanarized polymers, oligo(p-phenylenes), and PPP. When the bridges were n-dodecyl- or n-octylphenyl-substituted, the fully planar structures could be made into flexible free-standing films. Additionally, an improved method is described in which a common intermediate, an aryl dibromo diacyl halide, could be used to prepare both the A and B units for the AB-type step growth polymerization. In one case, a selective alkylation or arylation of the acyl portions was accomplished using lower order cyanocuprates or Pd(0)-catalyzed ketone formation. For the second monomer, a bis-Curtius rearrangement, in the presence of tert-butyl alcohol, converted both carbonyl moieties to BOC protected amines.
- Lamba, Jaydeep J. S.,Tour, James M.
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p. 11723 - 11736
(2007/10/02)
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