Synthesis and structure of high-quality films of copper polyphthalocyanine – 2D conductive polymer

Sedlovets, Daria M.; Shuvalov, Maxim V.; Vishnevskiy, Yury V.; Волков, В. Т.; Khodos, I. I.; Trofimov, O.V.; Korepanov, Vitaly I.

doi:10.1016/j.materresbull.2013.06.015

Cited by 31 publications

(26 citation statements)

References 23 publications

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“…In monomeric PCs, the electronic conjugation spreads mainly over the 18 π electrons of the inner ring [15], and the characteristic signature of such structure is the Q band in 650-700 nm range, attributed to the HOMO-LUMO transition. Electronic structure of the polymeric PCs however is drastically different: depending on the central metal they either are semi-metals or have a low band gap in IR spectral region [14]. Therefore, the Q band in visible region should not be observed in polymers.…”

Section: Optical Absorptionmentioning

confidence: 99%

Spectroscopic identification of 2D conjugated polyphthalocyanines

Korepanov

Sedlovets

2019

Mater. Res. Express

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Since the discovery of polyphthalocyanines (PPCs) in late 1950s, numerous attempts have been made to synthesize this 2D polymer by different approaches. Interestingly, the reported IR, Raman and UV-vis spectra of PPCs show drastic variation depending on the synthesis conditions. In this work, we show that the spectral data obtained in some works should be assigned not to the target polymer, but rather to octacyano phthalocyanine (OCP), which is an early step of the reaction. We discuss the spectral signatures of the well-polymerized and monomeric PCs based on reliable experimental data and support the spectral assignments with DFT calculations.

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Section: Optical Absorptionmentioning

confidence: 99%

Spectroscopic identification of 2D conjugated polyphthalocyanines

Korepanov

Sedlovets

2019

Mater. Res. Express

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“…The CuPPc thin film was synthesized by CVD setup, following the protocol as reported in the literature. 26 A schematic illustration of the synthetic process and experimental setup are shown in Figure 1a,b. The reaction was carried out in a two-zone oven.…”

Section: Results and Discussionmentioning

confidence: 99%

Nonvolatile Memory Device Based on Copper Polyphthalocyanine Thin Films

et al. 2019

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In this work, we report the fabrication of nonvolatile memory devices based on chemical vapor deposition-grown copper polyphthalocyanine (CuPPc) thin films. The high polymerization degree and crystallinity of the as-obtained films were confirmed by transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–vis studies. It was found that the device with Au/CuPPc/indium tin oxide sandwich structure exhibits good nonvolatile memory performance with a large ON/OFF current ratio of 10 3 and long retention time of 1.2 × 10 3 s.

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“…The structures from the quantumchemical calculation were taken as the input data. The geometry was optimized in the Quantum Espresso program [7] with the PBE functional (details of the calculation are described in [6]).…”

Section: Methodology Of Electronic-diffraction Simulationmentioning

confidence: 99%

“…For this reason, the development of methods for the direct synthesis of thin PPC films can significantly affect the development of the material base of microelectronics and information technology. In [6], we developed an original procedure for preparing copper PPC by the method of two-zone chemical vapor deposition. The proposed method makes it possible to prepare thin films of copper PPC which have a high degree of polymerization and structural perfection.…”

Section: Introductionmentioning

confidence: 99%

Study of the Structure of Polyphthalocyanines by Transmission Electron Microscopy

Sedlovets

Korepanov

Khodos

2018

J. Synch. Investig.

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Two-dimensional polymers are highly promising materials for microsystems technologies and fundamental science. Some of the most interesting, but relatively unstudied, materials of this kind are polyphthalocyanines. These are a unique class of organometallic polymers with a two-dimensional conjugated structure and variable electronic properties. Since polyphthalocyanines of a high degree of polymerization can be obtained only as thin films and not as a bulk crystal, their study and characterization is a complicated scientific challenge. In this work we demonstrate the potential of transmission electron microscopy as a key tool in characterizing thin films. In particular, transmission-electron-microscopy data provide a basis for interpreting the Raman spectra of polyphthalocyanines, and also make possible interpretation of the crystal structure of the two-dimensional polymer.

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Synthesis and structure of high-quality films of copper polyphthalocyanine – 2D conductive polymer

Cited by 31 publications

References 23 publications

Spectroscopic identification of 2D conjugated polyphthalocyanines

Spectroscopic identification of 2D conjugated polyphthalocyanines

Nonvolatile Memory Device Based on Copper Polyphthalocyanine Thin Films

Study of the Structure of Polyphthalocyanines by Transmission Electron Microscopy

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