- Improved synthesis of dithieno[3,2-b:2′,3′-d]thiophene (DTT) and derivatives for cross coupling
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An improved synthesis of dithieno[3,2-b:2′,3′-d]thiophene (DTT) and its 2,6- and 3,5-dibromo derivatives has been devised; Stille cross coupling of 2,5-(bistrimethylstannyl)-DTT afforded the oligomer 12.
- Frey, Joseph,Bond, Andrew D.,Holmes, Andrew B.
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- Effect of a π-linker of push-pull D-π-A donor molecules on the performance of organic photodetectors
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We report organic photodetectors (OPDs) exhibiting high photocurrent density (Jph), low dark current density (Jd), and broadband external quantum efficiency (EQE) based on three push-pull type D-π-A small molecule donors (H1, H2, and H3) with different π-
- Chae, Sangmin,Choi, Min-Soo,Hong, Jong-In,Kim, Hyo Jung,Kim, Jang-Joo,Lim, Hong Chul
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p. 11145 - 11152
(2020/09/09)
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- Effect of the π-linker on the performance of organic photovoltaic devices based on push-pull D-π-A molecules
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Two push-pull D-π-A molecules, 3T and DTT as donor materials, were synthesized and characterized for solution-processed bulk heterojunction (BHJ) organic photovoltaic (OPV) devices. The π-linker plays a vital role not only in electrochemical and thermal p
- Lim, Hong Chul,Kim, Jang-Joo,Jang, Jyongsik,Hong, Jong-In
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p. 11458 - 11464
(2018/07/24)
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- Organic Dye and Dye-Sensitized Solar Cell
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PURPOSE: An organic dye, photoelectric diode including the same and dye-sensitized solar battery are provided to have an absorbing band in long wavelength. CONSTITUTION: An organic dye is represented by chemical formula 1. A photoelectric diode includes porous oxide semiconductor membrane which includes the organic dye. A dye-sensitized solar cell comprises a first electrode, a second electrode which is formed on one side of the first electrode and includes a light absorptive layer, and electrolyte buried in a space between the first and second electrodes.
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Paragraph 0204; 0211-0216
(2018/02/10)
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- Efficient Synthesis of Bis(dibromomethyl)arenes as Important Precursors of Synthetically Useful Dialdehydes
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This work presents an efficient synthesis of bis(dibromomethyl)benzenes and a bis(dibromomethyl)thiophene as precursors of aromatic dialdehydes by bromination of dimethyl-substituted arenes under various reaction conditions (yields up to 99%). Several new variants of this reaction, including the use of N-bromosuccinimide (NBS) and bromine, and various solvents to replace carbon tetrachloride, benzene and carbon disulfide, were also tested. In the optimised protocols, the inconvenient solvents were replaced by 1,2-dichloroethane (DCE) and/or acetonitrile. In the DCE protocols, we reduced reaction times 24-32-fold, reduced the amount of NBS a fewfold and lowered power consumption relative to the literature protocols. The procedures also allowed elimination of long-lasting incandescent irradiation (100-500 W). The replacement of NBS by bromine led to a further reduction in the amount of brominating agent. The obtained bromo derivatives were efficiently converted into the corresponding dialdehydes (90-96%), which in turn are useful in materials chemistry.
- Bodzioch, Agnieszka,Owsianik, Krzysztof,Skalik, Joanna,Kowalska, Emilia,Stasiak, Anna,Ró?ycka-Soko?owska, Ewa,Marciniak, Bernard,Ba?czewski, Piotr
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p. 3509 - 3514
(2016/10/17)
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- NOVEL THIOPHENE DERIVATIVES, MANUFACTURING METHOD THEREOF AND ORGANIC SOLAR CELL CONTAINING THE SAME
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Provided are a novel thiophene derivative, a method for preparing the same, and an organic solar cell comprising the novel thiophene derivative. According to the present invention, the novel thiophene derivative that has a small band gap is prepared by copolymerizing an electron acceptor block and an electron donor block each consisting of thiophene units and vinylene units, and thus a highly efficient solar cell can be manufactured from the novel thiophene derivative. Furthermore, according to the present invention, an organic solar cell manufactured from the novel thiophene derivative having a small band gap has an improved performance and increased solubility, and can effectively absorb solar light.COPYRIGHT KIPO 2015
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Paragraph 0080-0082
(2017/04/21)
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- Synthesis of Thieno--, -- and --thiophenes and Thieno--, -- and --thienopyrimidin-7(6H)-ones Starting from Thiophene
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3-Bromo-, 3,5-dibromo- and 3,4,5-tribromo-2-thienyllithium have been prepared by bromine ->lithium exchange and converted into a number of thiophene derivatives, including the corresponding 2-carbaldehydes.The aldehydes have been converted into the corresponding thiophene-2-carbonitriles.Metallation of 2,5-dibromo- or 2,4,5-tribromo-thiophene with LDA occured at a vacant 3-position but the resulting 3-lithiated thiophenes rearranged (mechanism discussed) to 3,5-dibromo- and 3,4,5-tribromo-2-thienyllithium, which were quenched with various electrophiles.Attempts to dilithiate 2,5-dibromothiophene with LDA were unsuccessful. 3,4-Dibromo-2,5-dilithiothiophene was prepared from 2,3,4,5-tetrabromothiophene but it failed to yield the 2,5-dicarbaldehyde with N,N-dimethylformamide.The title thienothiophenes were prepared by reaction of a 3-bromothiophene-2-carbaldehyde, a 2-bromothiophene-3-carbaldehyde (prepared by bromination of a thiophene-3-carbaldehyde) or a 4-bromothiophene-3-carbaldehyde, or a corresponding nitrile, with ethyl 2-sulfanylacetate or 2-sulfanylacetamide.Thienothiophenes carrying an o-aminocarboxamide substitution pattern gave the title thienothienopyrimidinones with triethyl orthoformate.
- Hawkins, David W.,Iddon, Brian,Longthorne, Darren S.,Rosyk, Peter J.
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p. 2735 - 2744
(2007/10/02)
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