Nandi, Sujay Kumar and Diaz Diaz, David and Haldar, Debasish (2022) Hydrazine-Modified Topology-Dependent Conductivity of Cyclic NDI as a Molecular Circuit. JOURNAL OF PHYSICAL CHEMISTRY C, 126 (1). pp. 675-682. ISSN 1932-7447, 1932-7455
Full text not available from this repository. (Request a copy)Abstract
Significant conductance enhancement can be achieved by topology modification of n-type semiconducting naphthalenediimide (NDI) as a molecular circuit. Hydrazine not only reduces electron-deficient NDI to NDI(center dot-)radical anions but also modifies the topology by selectively replacing the amino acid methyl esters from NDI 1 and forms a cyclic NDI nanorim. On treatment with hydrazine, the NDI 1 emission band at 525 nm gradually disappears, and a new band appears at 607 nm, presumably due to NDI oligomer formation. Eventually, a shiny black, almost insoluble precipitate of the NDI nanorim appeared. The cyclic NDI nanorim was characterized by powder X-ray diffraction, high-resolution mass spectrometry, Fourier transform infrared, and C-13 CP-MAS NMR spectroscopy. Cyclic voltammetry (CV) of NDI 1 possesses two sequential one-electron cathodic waves at -0.4661 and -0.9456 V versus Ag/Ag+ due to NDI center dot- and NDI2- formation. However, CV of the NDI nanorim reveals four distinct reversible one-electron waves due to electronic communication between the four NDI redox centers within the nanorim. The I-V measurements show sevenfold conductance enhancements by topology modification from linear NDI to a nanorim.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NAPHTHALENEDIIMIDE; FLUORESCENT; CYCLOPHANE; DIMER |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. David Díaz Díaz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Sep 2022 04:26 |
| Last Modified: | 01 Sep 2022 04:26 |
| URI: | https://pred.uni-regensburg.de/id/eprint/47095 |
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