Compositionally Controlled Electron Transfer in Metallo-Organics

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(32), P. 18075 - 18083

Published: Aug. 2, 2023

We demonstrate here the assembly of a nanolayer electrochromic iron complexes on top composite layers cobalt and ruthenium complexes. Depending ratio latter two complexes, we can tailor materials that show different electron transport pathways, redox activities, color transitions. No activity layer, consisting is observable when relative amount low in underlying layer because insulating properties isostructural Increasing opens an channel, resulting charge storage both The trapped charges be chemically released by redox-active ferrocyanide at film-water interface.

Language: Английский

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A Bis(terpyridine)nickel(II)-Based Coordination Nanosheet: A Redox-Active Material with Flexibility and Transparency

Journal of Inorganic and Organometallic Polymers and Materials, Journal Year: 2023, Volume and Issue: unknown

Published: Nov. 27, 2023

Language: Английский

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Fine Pore‐Structure Engineering by Ligand Conformational Control of Naphthalene Diimide‐Based Semiconducting Porous Coordination Polymers for Efficient Chemiresistive Gas Sensing

Angewandte Chemie, Journal Year: 2022, Volume and Issue: 135(2)

Published: Nov. 15, 2022

Abstract Exploring new porous coordination polymers (PCPs) that have tunable structure and conductivity is attractive but remains challenging. Herein, fine pore engineering by ligand conformation control of naphthalene diimide (NDI)‐based semiconducting PCPs with π stacking‐dependent tunability achieved. The stacking distances in these isoreticular were modulated employing metal centers different geometries. As a result, three conjugated (Co−pyNDI, Ni−pyNDI, Zn−pyNDI) varying obtained. Their crystal structures determined three‐dimensional electron diffraction. through‐space charge transfer result selectivity sensitivity gas sensing. Zn−pyNDI can serve as room‐temperature operable chemiresistive sensor selective to acetone.

Language: Английский

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Assembling Triphenylene-Based Metal–Organic Framework Nanosheets at the Air/Liquid Interface: Modification by Tuning the Spread Solution Concentration

Langmuir, Journal Year: 2023, Volume and Issue: 39(26), P. 8952 - 8962

Published: June 16, 2023

Metal-organic frameworks (MOFs)─crystalline coordination polymers─with unique characteristics such as structural designability accompanied by tunable electronic properties and intrinsic uniform nanopores have become the platform for applications in diverse scientific areas ranging from nanotechnology to energy/environmental sciences. To utilize superior features of MOF potential applications, fabrication integration thin films are importance been actively sought. Especially, downsized MOFs into nanosheets can act ultimately functional components nanodevices potentially display chemical/physical rarely seen bulk MOFs. Assembling aligning amphiphilic molecules at air/liquid interface has known Langmuir technique. By utilizing a reaction field between metal ions organic ligands, readily formed nanosheet state. The expected including electrical conduction largely depend on lateral size, thickness, morphology, crystallinity, orientation. However, their control not achieved yet. Here, we demonstrate how changing concentration ligand spread solution modify assembly nanosheets, composed 2,3,6,7,10,11-hexaiminotriphenylene (HITP) Ni2+ (HITP-Ni-NS), interface. A systematic increase leads enlargement both size thickness while retaining perfect alignment preferred On other hand, much higher concentrations, find that unreacted included HITP-Ni-NS, introducing disorder HITP-Ni-NS. These findings develop further sophisticated features, accelerating fundamental applied studies

Language: Английский

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Conjugated Coordination Nanosheets with Molecular Rotors for Pseudocapacitors: Nanoarchitectonics and Enhanced Performance.

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(67)

Published: Aug. 13, 2024

Abstract High‐level pseudocapacitive materials require incorporations of significant redox regions into conductive and penetrable skeletons to enable the creation devices capable delivering high power for extended periods. Coordination nanosheets (CNs) are appealing their natural electrical conductivities, huge explicit surface regions, semi‐one‐layered adjusted pore clusters. Thus, rational design ligands topological networks with desired electronic structure is required advancement in this field. Herein, we report three novel conjugated CNs (RV‐10‐M, M=Zn, Ni, Co), by utilizing full conjugation terpyridine‐attached flexible tetraphenylethylene (TPE) units as molecular rotors at center. We prepare binder‐free transparent supported on Ni‐foam outstanding properties via a hydrothermal route followed facile exfoliation. Among CNs, area RV‐10‐Co facilitates fast transport ions electrons could achieve specific capacity 670.8 C/g (1677 F/g) 1 A/g current density. Besides, corresponding possesses maximum energy density 37.26 Wh kg −1 171 W 70 % capacitance retention even after 1000 cycles.

Language: Английский

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