The title compound, CHNO [systematic name: 2,6-di-benzyl-pyrrolo-[3,4-]iso-indole-1,3,5,7(2,6)-tetra-one], consists of a central pyromellitic di-imide moiety with terminal benzyl groups at the N-atom positions. The mol-ecule is located about an inversion centre, so the asymmetric unit contains one half-mol-ecule. In the mol-ecule, both terminal phenyl groups, tilted by 72.97 (4)° with respect to the mean plane of the central pyromellitic di-imide moiety (r.m.s. deviation = 0.0145 Å), are oriented away from each other, forming an elongated S-shaped conformation. In the crystal, mol-ecules are connected weak C-H⋯O hydrogen bonds and C-H⋯π inter-actions, resulting in the formation of supra-molecular layers extending parallel to the plane.
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http://dx.doi.org/10.1107/S2056989016017710 | DOI Listing |
Acta Crystallogr C Struct Chem
October 2024
College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People's Republic of China.
A new three-dimensional (3D) coordination polymer, namely, poly[diaqua[μ-2,2'-(1,3,5,7-tetraoxo-1,2,3,5,6,7-hexahydropyrrolo[3,4-f]isoindole-2,6-diyl)diacetato]barium(II)], [Ba(CHNO)(HO)], (I), has been synthesized by the microwave-irradiated reaction of Ba(NO) with N,N'-bis(glycinyl)pyromellitic diimide {BGPD, namely, 2,2'-(1,3,5,7-tetraoxo-1,2,3,5,6,7-hexahydropyrrolo[3,4-f]isoindole-2,6-diyl)diacetatic acid, HL}. The title compound was structurally characterized by single-crystal X-ray diffraction analysis and powder X-ray diffraction analysis, as well as IR spectroscopy. In the crystal structure of (I), the Ba ion is nine-coordinated by six carboxylate O atoms from five symmetry-related L dianions and one imide O atom, as well as two water O atoms.
View Article and Find Full Text PDFJ Am Chem Soc
May 2024
Department of Chemistry─Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden.
The development of redox-conductive metal-organic frameworks (MOFs) and the fundamental understanding of charge propagation through these materials are central to their applications in energy storage, electronics, and catalysis. To answer some unresolved questions about diffusional electron hopping transport and redox conductivity, mixed-linker MOFs were constructed from two statistically distributed redox-active linkers, pyromellitic diimide bis-pyrazolate (PMDI) and naphthalene diimide bis-pyrazolate (NDI), and grown as crystalline thin films on conductive fluorine-doped tin oxide (FTO). Owing to the distinct redox properties of the linkers, four well-separated and reversible redox events are resolved by cyclic voltammetry, and the mixed-linker MOFs can exist in five discrete redox states.
View Article and Find Full Text PDFSmall
August 2024
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, School of New Energy, North China Electric Power University, Beijing, 102206, China.
The open circuit voltage (V) losses at multiple interfaces within perovskite solar cells (PSCs) limit the improvements in power conversion efficiency (PCE). Herein, a tailored strategy is proposed to reduce the energy offset at both hetero-interfaces within PSCs to decrease the V losses. For the interface of perovskite and electron transport layer where exists a mass of defects, it uses the pyromellitic acid to serve as a molecular bridge, which reduces non-radiative recombination and energy level offset.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2022
School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China.
A novel poly(phenazine-alt-pyromellitic anhydride) (PPPA) has been successfully designed and synthesized via a condensation polymerization strategy as promising cathode material in organic zinc-ion batteries. Electrochemical quartz crystal microbalance (EQCM), FTIR and XPS characterizations verify a reversible Zn -coordination mechanism in our PPPA cathode. Intriguingly, an ultrahigh Zn diffusion coefficient of 1.
View Article and Find Full Text PDFMacromol Rapid Commun
December 2021
Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Science and Medicine; Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.
The development of efficient and inexpensive materials for light energy conversion is very important for achieving sustainable energy supply and carbon neutrality. Polymeric carbon nitride has become a promising material for light energy conversion due to its advantages of simple preparation and high physical and chemical stability. However, the pristine polymeric carbon nitride only absorbs light with a wavelength of less than 450 nm, and the energy conversion for low-energy photons is very limited.
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