- Organic micromolecular material with high refractive index and application thereof
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The invention belongs to the technical field of organic photoelectric materials, and discloses an organic micromolecular material with a high refractive index and application thereof. The structure of the organic micromolecular material with a high refrac
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Paragraph 0031-0035; 0045-0049
(2021/06/09)
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- High-performance hole transport material and preparation method and application thereof
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The invention belongs to the technical field of small organic molecule photoelectric materials, and discloses a high-performance hole transport material and a preparation method and application thereof. The structure of the hole transport material is show
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Paragraph 0055; 0059-0061; 0087; 0091-0093
(2020/06/20)
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- Nucleophilic ipso-Substitution of Aryl Methyl Ethers through Aryl C-OMe Bond Cleavage; Access to Functionalized Bisthiophenes
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A metal and solvent free strategy to functionalize aryl methyl ethers through direct nucleophilic substitution of aryl C-OMe bond has been described. A wide range of O, S, N, and C-centered uncharged nucleophiles has been successfully employed. Using this protocol, functional derivatives of bisthiophene have been synthesized in a straightforward way. The reactions are highly atom-efficient and generate methanol as the only byproduct.
- Mishra, Abhishek Kumar,Verma, Ajay,Biswas, Srijit
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p. 3403 - 3410
(2017/04/13)
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- Simultaneous harvesting of triplet excitons in OLEDs by both guest and host materials with an intramolecular charge-transfer feature via triplet-triplet annihilation
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A red naphthalimide derivative with an intramolecular charge-transfer (ICT) feature, namely (E)-2-(4-(t-butyl)phenyl)-6-(2-(6-(diphenylamino)naphthalen-2-yl)vinyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione (NA-TNA), was designed and synthesized. Photophysical and magneto-electroluminescence (MEL) characterization results revealed that NA-TNA could harvest triplet excitons via a triplet-triplet annihilation (TTA) process in organic light-emitting diodes (OLEDs) due to the presence of a lower-lying triplet excited state with 3ππ character. Consequently, using NA-TNA as a guest compound and CzPhONI, another ICT-featured naphthalimide derivative with triplet fusion delayed fluorescence (TFDF) character as host material, a high-performance orange OLED with 6 wt% NA-TNA doped CzPhONI film as the emitting layer was acquired. The maximum current efficiency (LEmax), brightness (Lmax), and external quantum yield (EQEmax) of this OLED is 7.73 cd A-1, 31940 cd m-2 and 5.83%, respectively, while the theoretical EQEmax of this device should not exceed 3.34%. On the contrary, the reference device with a NA-TNA doping level of 1.4 wt% showed much inferior performance, with a LEmax, a Lmax, and an EQEmax of 3.19 cd A-1, 24 900 cd m-2 and 2.49%, respectively. The high performance of the 6 wt% NA-TNA doped device was attributed to the efficient harvesting of triplet excitons by both the guest and host materials.
- Zheng, Xujun,Peng, Qiming,Lin, Jie,Wang, Yi,Zhou, Jie,Jiao, Yan,Bai, Yuefeng,Huang, Yan,Li, Feng,Liu, Xingyuan,Pu, Xuemei,Lu, Zhiyun
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supporting information
p. 6970 - 6978
(2015/07/15)
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- Structure-property relationship of naphthalene based donor-π-acceptor organic dyes for dye-sensitized solar cells: Remarkable improvement of open-circuit photovoltage
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Four new donor-π-acceptor organic dyes (YF01-04), containing naphthalene-substituted amines as an electron donor and cyanoacrylic acid as an electron acceptor, were designed and synthesized, and their photophysical properties and dye-sensitized solar cells (DSCs) performances were characterized. Dyes YF02 and YF04, with 2,6-disubstituted naphthalene frameworks, were superior than their analog dyes YF03 and YF01, having 1,2-disubstituted naphthalene moiety, in incident-photo-to-current conversion efficiency (IPCE) and total solar-to-electric conversion efficiency (η). The DSCs based on YF02, comprised of diphenylamine moiety as the donor, produced the highest η of 5.29% compared to 4.03% of the analog dye YF04, which has pyrrolidine as the donor. Remarkably, a high open-circuit photovoltage (V oc) of 0.799-0.807 V was achieved in the cases of YF02-03, which have diphenylamine-donors. To better understand the structure-property relationship for DSCs application, molecular modelling was performed on YF01-04 and vertical electronic excitations were calculated using long-range corrected energy functional WB97XD and CAM-B3LYP at the basis set level DGDZVP, which were in excellent agreement with the experimental results. Moreover, the equilibrium molecular geometries of dyes YF01-04 were calculated at the density function theory (DFT) level using the hybrid energy functional B3LYP and basis set DGDZVP. The torsion angles () between the naphthalene moiety and diphenylamine donor in YF02 and YF03 were more twisted than that of the pyrrolidine-donor dyes YF01 and YF04, precluding efficient intermolecular π-π charge transfer, which translated into high Voc. Compared to the reference dye TA-St-CA, which is based on diphenylamine as an electron donor linked to a phenyl ring, YF02 achieved higher Voc, which indicated that naphthalene substituted with diphenylamine is more efficient in retarding charge recombinations.
- Yang, Fan,Jin, Tienan,Yamamoto, Yoshinori,Akhtaruzzaman, Md.,Islam, Ashraful,Qin, Chuanjiang,Han, Liyuan,El-Shafei, Ahmed,Alamry, Khalid A.,Kosa, Samia A.,Hussein, Mahmoud A.,Asiri, Abdullah Mohamed
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supporting information
p. 22550 - 22557,8
(2020/09/15)
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- Highly selective chemical vapor sensing by molecular recognition: Specific detection of C1-C4 alcohols with a fluorescent phosphonate cavitand
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Fiat lux on alcohols: Molecular-level resolution was achieved for the detection of short-chain alcohols in the vapor phase using a fluorescent cavitand sensor. The transduction mechanism, activated exclusively by the complexation mode, is provided by the change of the electronic density on the fluorophore caused by the formation of an intracavity hydrogen bond between the cavitand P-O and the alcohol OH group.
- Maffei, Francesca,Betti, Paolo,Genovese, Damiano,Montalti, Marco,Prodi, Luca,Dea Zorzi, Rita,Geremia, Silvano,Dalcanale, Enrico
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supporting information; experimental part
p. 4654 - 4657
(2011/06/27)
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- TRI-2-NAPHTHYLAMINES
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The invention relates to tri-2-naphthylamines that can be useful in a variety of optical devices as hole-transport materials. For example, the tri-2-naphthylamines can be useful as hole-transport materials in organic light emitting diodes.
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Page/Page column 14-15
(2011/04/25)
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- AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
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An aromatic amine derivative having a specific structure. An organic electroluminescence device which is composed of one or more organic thin film layers including at least one light emitting layer sandwiched between a cathode and an anode, wherein at lea
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- Benzothiazole-containing two-photon chromophores exhibiting strong frequency upconversion
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There are provided asymmetrical two-photon chromophores of the formula: D-Ar-A wherein Ar is selected from the group consisting of wherein Fl is a fluorene group of the formula: wherein R1 and R2 are alkyl groups having 2 to 20 carbon atoms, and wherein R1 and R2 are the same or different; wherein D is wherein Q is selected from the group consisting of -H, -OH and -O-CxH2x+1, wherein x has a value of 1 to 10; and wherein A is selected from the group consisting of wherein Z is selected from the group consisting of -O- and -S-.
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