Showing papers on "Derivative (chemistry) published in 2020"
128 citations
123 citations
107 citations
TL;DR: A supramolecular assembly was constructed by the nonconvalent interaction of pillar[5]arene with a pyridinium modified tetraphenylethene derivative, in which Py-TPE/WP5 acted as a donor and sulforhodamine 101 and sulfonated aluminum phthalocyanine acted as acceptors to realize a highly efficient light-harvesting system with two-step sequential energy transfer.
57 citations
55 citations
30 Oct 2020
TL;DR: In this article, non-fullerene acceptors (NFAs) represent the latest breakthrough in organic solar cells (OSCs), which significantly outperform the long benchmark OSCs with fullerene derivative acceptors.
Abstract: ConspectusNonfullerene acceptors (NFAs) represent the latest breakthrough in organic solar cells (OSCs), which significantly outperform the long benchmark OSCs with fullerene derivative acceptors. ...
52 citations
TL;DR: In this paper, the title compound has been 2-(1-(benzo[d]thiazol-2]-2-yl)-5-(3,4-dimethoxyphenyl)-4,5-dihydro-1H-pyrazol-3-yl)phenol (BTDP) synthesized by reaction of (E)-3-( 3, 4-dimethenyl]-1-(2-hydroxymhenyl)prop-2-en-1-one (DMPO) with 2-Hydrazinylben
43 citations
01 Jan 2020
TL;DR: In this paper, a Fe, Ndecorated fullerene derivative (N-methyl-2-ferrocenyl-pyrrolidinofullerene C60) is activated under NH3 stream to achieving porous Fe3O4/N-C nanomaterials with high catalytic activity toward ORR.
Abstract: Development of high-performance oxygen reduction reaction (ORR) catalysts to replace the noble metal-based materials is critical for energy applications. Fullerenes, in the form of carbon cage with the intrinsic curvature and pentagons, have been theoretically simulated as promising ORR catalysts via atom doping and defect modification. However, fullerene-based catalysts remain challenging in achieving ORR performance comparable to Pt/C given the lack of fullerene host-dopant synergism. A rational strategy is to anchor active species on fullerene cage to enhance ORR response. Herein, a Fe, Ndecorated fullerene derivative (N-methyl-2-ferrocenyl-pyrrolidinofullerene C60) is activated under NH3 stream to achieving porous Fe3O4/N-C nanomaterials with high catalytic activity toward ORR. The optimal NH3-etching temperature of 700 °C gives rise to open-pore structures, large surface area, favorable N doping, active Fe3O4 sites and short-range ordered nanographene. Through these synergetic effects, the fullerene-derived FMN700 exhibits superior ORR activity, along with respectable durability and tolerance to methanol, which surpass most of the reported fullerene-based carbon materials. This work provides a new strategy for the design and synthesis of porous carbon composites as a new class of catalysts for highperformance ORR.
42 citations
42 citations
TL;DR: In this paper, 1,4-Diaminoanthraquinones (DAAQs) are part of Nonaqueous Redox Flow Batteries (RFBs) for large-scale grid energy storage.
Abstract: Nonaqueous redox flow batteries (RFBs) based on redox-active organic molecules are regarded as a promising technology for large-scale grid energy storage. 1,4-Diaminoanthraquinones (DAAQs) are part...
40 citations
Posted Content•
03 Dec 2020
TL;DR: The synthesis and crystal structure of Rb3InCl6 is presented, prepared from air stable reagents via a two-step process that proceeds through the intermediate Rb2InCl5·H2O, which results in intense cyan-green photoluminescence originating from localized 5s2 to 5s15p1 electronic transitions of [SbCl6]3- polyatomic anions.
Abstract: Here, we present the synthesis and crystal structure of Rb3InCl6 prepared from air stable reagents via a two-step process that proceeds through the intermediate Rb2InCl5·H2O. Rb3InCl6 crystallizes ...
TL;DR: The enantioselective catalytic oxetane ring opening was employed as part of a 3-step, gram-scale synthesis of pretomanid, a recently-approved medication for the treatment of multi-drug-resistant tuberculosis.
Abstract: A precisely designed chiral squaramide derivative is shown to promote the highly enantioselective addition of trimethylsilyl bromide (TMSBr) to a broad variety of 3-substituted and 3,3-disubstitute...
TL;DR: In this article, two flexible and colorless polymers are synthesized based on a phosphorus-containing derivative of a bio-based aromatic aldehyde (4-hydroxybenzaldehyde) by a thiol-ene reaction.
Abstract: Two flexible and colorless polymers are synthesized based on a phosphorus-containing derivative of a bio-based aromatic aldehyde (4-hydroxybenzaldehyde) by a thiol-ene reaction. Thanks to the high ...
TL;DR: In this article, the tetra-and hexa-functionalized 1,2,3,4,9,10,10-addition pattern with unique "S"-shaped configuration was obtained by cyclization reaction of the dianionic species generated electrochemically from a [60] fulleroindoline with bromomethylbenzene at 0 °C.
Abstract: The efficient and regioselective electrosynthesis of tetra- and hexa-functionalized [60]fullerene derivatives with unprecedented addition patterns has been achieved. The tetra-functionalized [60]fullerene derivative with an intriguing 1,2,4,17-addition pattern is regioselectively obtained by cyclization reaction of the dianionic species generated electrochemically from a [60]fulleroindoline with 1,2-bis(bromomethyl)benzene at 0 °C, and can be converted to the more stable 1,2,3,4-adduct at 25 °C. Furthermore, the hexa-functionalized [60]fullerene derivative with the 1,2,3,4,9,10-addition pattern displaying a unique "S"-shaped configuration can be synthesized by protonation of the electrochemically generated dianion of the obtained tetra-functionalized 1,2,4,17-adduct. The structures of the tetra- and hexa-functionalized products have been determined by spectroscopic data and single-crystal X-ray analysis.
16 Jun 2020
TL;DR: High catalytic efficiency, easy fabrication, and recycling ability of NiFeTi CLDH calcined at 600 °C make it a potential catalyst for the synthesis of xanthene, 1,4-dihydropyridine, and polyhydroquinoline derivatives.
Abstract: This work is generally focused on the synthesis of NiFeTi-layered double hydroxides (LDHs) using a hydrothermal route, which were calcined at various temperatures (varying from 200 to 600 °C). The ...
TL;DR: A zeolitic imidazole framework-8 (ZIF-8) derivative was synthesized and developed as the corrosion inhibitor of copper in 0.5 mM NaCl solution, and its inhibition performance was investigated by electrochemical measurement and surface analysis as mentioned in this paper.
TL;DR: A new group of thiophene-based derivative liquid crystals named 4-[(thiophen-3-yl)methyleneamino]phenyl 4-alkoxyoxybenzoates were synthesised and analysed mesomorphic and optical behaviour as well.
Abstract: A new group of thiophene-based derivative liquid crystals named, 4-[(thiophen-3-yl)methyleneamino]phenyl 4-alkoxyoxybenzoates were synthesised and analysed mesomorphic and optical behaviour as well...
16 Mar 2020
TL;DR: A dissipative assembly process is an out-of-equilibrium dynamic process driven by chemical fuels as discussed by the authors, which plays very important roles in different types of biochemical process in nature.
Abstract: A dissipative assembly process is an out-of-equilibrium dynamic process driven by chemical fuels. Such processes play very important roles in different types of biochemical process in nature. Herei...
TL;DR: In this article, a new indole acetamide was synthesized with good yield by stirring the compound N-(2-Aminophenyl)-2-(4-chlorophenoxy)acetamide (3) with 1H-indole-2-carboxylic acid (4), in dry dichloromethane (DCM) followed by the addition of lutidine, and N,N, N′,N′-O-(Benzotriazole-1-yl)-tetramethyluronium tetrafluoroborate (TBT
TL;DR: In this article, a series of ternary FeCoNi (FCN•PBAs) were obtained by temperature control surfactant desorption ability and their morphologies changed from truncated octahedrons to cubic octahedral and truncated cubes.
Abstract: Prussian blue analogues (PBAs) are mostly binary metallic compounds with a cubic structure, which greatly limits the structure and component of derived transition‐metal phosphides (TMPs) and affects their catalytic activities. This work focuses on regulating the morphology and composition of the PBA at the front‐end to optimize the OER performance of the derived TMP. By temperature control surfactant desorption ability, we obtain a series of ternary FeCoNi (FCN‐PBAs). With the increase of temperature, their morphologies change from truncated octahedrons to cubic octahedrons and truncated cubes, in which the Fe content basically remains unchanged and the Co/Ni ratio gradually decreased. Due to the synergistic effect among ternary TMPs, all phosphidation products (FCN‐P) exhibit better OER activities than RuO2, among which FCN‐40‐P shows the best performance. As confirmed by XPS analyses, the appropriate chemical composition enhances the oxidizabilityof TM species, promotes the chemical adsorption of OH−, and accelerates OER kinetics.
21 Jul 2020
TL;DR: In this paper, the solid-state structure of a phosha-Michael adduct engaged in a cage-opened C60 skeleton is revealed, which is formed as a kinetic product.
Abstract: Organophosphorus zwitterions are one of the most important but elusive intermediates for carbon–carbon bond formation in synthetic chemistry and biology. However, a lack of isolated examples due to their lability has hampered in-depth understanding of structures and their reaction mechanisms. In this study, we crystallographically reveal the solid-state structure of a phosha-Michael adduct engaged in a cage-opened C60 skeleton, which is formed as a kinetic product. This compound exhibits dark brown colour in solution with an intense absorption band that extends to 1000 nm, reflecting intramolecular charge transfer transitions. From the 1,2-dicarbonyl moiety on the conjugated orifice, β-oxo-phosphorus ylide is formed as a thermodynamic product. The reaction mechanism that has long been disputed is examined by experimental and theoretical studies, showing a pathway which includes an SN2 reaction as a key step instead of the hitherto considered carbene pathway. Organophosphorous zwitterions are important intermediates in organic synthesis but can be unstable and difficult to characterise. Here, two analogues of such intermediates stabilised by conjugation to an open-cage fullerene derivative allow for characterisation by single-crystal X-ray diffraction, with mechanistic implications.