- Photocontrolled Synthesis of n-Type Conjugated Polymers
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Current approaches to synthesize π-conjugated polymers (CPs) are dominated by thermally driven, transition-metal-mediated reactions. Herein we show that electron-deficient Grignard monomers readily polymerize under visible-light irradiation at room temperature in the absence of a catalyst. The product distribution can be tuned by the wavelength of irradiation based on the absorption of the polymer. Conversion studies are consistent with an uncontrolled chain-growth process; correspondingly, chain extension produces all-conjugated n-type block copolymers. Preliminary results demonstrate that the polymerization can be expanded to donor–acceptor alternating copolymers. We anticipate that this method can serve as a platform to access new architectures of n-type CPs without the need for transition-metal catalysis.
- Berl, Alexandra J.,Kalow, Julia A.,Woods, Eliot F.
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supporting information
p. 6062 - 6067
(2020/02/27)
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- Discovery of novel 4-aryl-thieno[1,4]diazepin-2-one derivatives targeting multiple protein kinases as anticancer agents
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A series of 4-aryl-thieno[1,4]diazepin-2-one were synthesized and evaluated for their antiproliferative activities against the A375P melanoma and U937 hematopoietic cell lines. Several compounds showed very potent antiproliferative activities toward both cell lines and the activities were better than that of sorafenib, the reference standard. Derivatives were made as amide (8a–8i, 9a–9m) and urea (10a–10d, 11a–11d) with diverse hydrophobic moieties. One of the most potent inhibitor 10d, 1-(4-((4-ethylpiperazin-1-yl)methyl)-3-(trifluoromethyl)phenyl)-3-(4-(2-oxo-2,3-dihydro-1H-thieno [3,4-b][1,4]diazepin-4-yl)phenyl)urea was found to be very potent inhibitor of multi-protein kinases including FMS kinase (IC50 = 3.73 nM) and is a promising candidate for further development in therapeutics for cancer.
- Lee, Junghun,Jung, Hoyong,Kim, Minjung,Lee, Eunkyu,Im, Daseul,Aman, Waqar,Hah, Jung-Mi
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p. 1628 - 1637
(2018/02/21)
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- In Situ Oxidation Synthesis of p-Type Composite with Narrow-Bandgap Small Organic Molecule Coating on Single-Walled Carbon Nanotube: Flexible Film and Thermoelectric Performance
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Although composites of organic polymers or n-type small molecule/carbon nanotube (CNT) have achieved significant advances in thermoelectric (TE) applications, p-type TE composites of small organic molecules as thick surface coating layers on the surfaces of inorganic nanoparticles still remain a great challenge. Taking advantage of in situ oxidation reaction of thieno[3,4-b]pyrazine (TP) into TP di-N-oxide (TPNO) on single-walled CNT (SWCNT) surface, a novel synthesis strategy is proposed to achieve flexible films of TE composites with narrow-bandgap (1.19 eV) small molecule coating on SWCNT surface. The TE performance can be effectively enhanced and conveniently tuned by poly(sodium-p-styrenesulfonate) content, TPNO/SWCNT mass ratio, and posttreatment by various polar solvents. The maximum of the composite power factor at room temperature is 29.4 ± 1.0 μW m?1 K?2. The work presents a way to achieve flexible films of p-type small organic molecule/inorganic composites with clear surface coating morphology for TE application.
- Gao, Caiyan,Chen, Guangming
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- Donor-Acceptor-Donor Thienopyrazines via Pd-Catalyzed C-H Activation as NIR Fluorescent Materials
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A series of thienopyrazine-based donor-acceptor-donor (D-A-D) near-infrared (NIR) fluorescent compounds were synthesized through a rapid, palladium-catalyzed C-H activation route. The dyes were studied through computational analysis, electrochemical prope
- McNamara, Louis E.,Liyanage, Nalaka,Peddapuram, Adithya,Murphy, J. Scott,Delcamp, Jared H.,Hammer, Nathan I.
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- π-electron conjugated compound, manufacturing method therefor, and π-electron conjugated polymer obtained using same
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Provided are a π-electron conjugated polymer having a constitutional unit represented by general formula (2) that is suitable as an electrochromic material that changes from a desired colored state to a decolored state, a new compound that is a raw materi
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Page/Page column 33
(2013/08/28)
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- Iron(II) complexes containing thiophene-substituted "bispicen" ligands Spin-crossover, ligand rearrangements, and ferromagnetic interactions
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The synthesis and characterization of three new tetradentate "bispicen-type" ligands containing a substituted thiophene heterocycle are described [2,5-thienyl substituents = H (7), Ph (8), or 2-thienyl (9)]. Iron(II) bis(thiocyanate) coordination complexe
- Cheng, Haojin,Djukic, Brandon,Jenkins, Hilary,Gorelsky, Serge,Lemaire, Martin
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experimental part
p. 954 - 963
(2011/01/06)
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- Facile Synthesis of Annelated NADH Model Precursors
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A convenient route to γ-cyano fused pyridine derivatives, which are precursors of NADH models, is described.The method involves the reaction of 3,3-dimethoxy-2-formyl-propionitrile sodium salt (1) with amino derivatives of electron donating heterocyles le
- Benoit, R.,Dupas, G.,Bourguignon, J.,Queguiner, G.
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p. 1124 - 1126
(2007/10/02)
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