Organic photoconductive materials

Loutfy, Rafik O.; Hor, Ah‐Mee; Hsiao, C. K.; Baranyi, Giuseppa; Kazmaier, Peter M.

doi:10.1351/pac198860071047

Cited by 109 publications

(73 citation statements)

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“…The same should also apply to the compounds studied in this work. Furthermore, in photoconductive materials there appears to exist a direct correlation of the electrochemical stability of the acceptor components and the limitations of mobility due to trapping [8].…”

Section: Outlook and Applicationsmentioning

confidence: 99%

“…Some of the topics which have to be considered along these investigations are: (a) dependency of the redox potentials on the structure, (b) reversibility of the electron-transfer processes, (c) fatique resistance of the electron-transfer active units, (d) stability and structure of the intermediates, and (e) mechanism of multistep electrontransfer either in consecutive one-electron transfer or "two-electron"-transfer steps. The results of these studies may have impacts towards various sections of chemistry, as for example electron transfer catalysis [4], polargroup transfer vs SET (single electron transfer)-type mechanism [5], electrochromism [6], design of new conducting charge-transfer salts [7], organic photoconductive materials [8], or even the evaluation of new magnetic materials [9].…”

Section: Introductionmentioning

confidence: 99%

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Structural Effects Determining the Reductive Electron Transfer Chemistry of 2.5-Disubstituted Furans — One and “Two-electron” Transfer Behaviour Investigated by Cyclic Voltammetry and UV/VIS/NIR-Spectroelectrochemistry

Salbeck¹,

Schöberl²,

Rapp³

et al. 1991

Zeitschrift Für Physikalische Chemie

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Radical anions / Dianions / Trianions / One-electron and "Two-electron" transfer processes / Dicyanovinyl substituted heterocyclesThe reductive electron transfer behaviour of 2,5-disubstituted furans with the general formula A is investigated. A comparison with related dicyanovinyl substituted benzene derivatives, a monosubstituted furan, thiophenes and pyrrols is given. Radical anions, dianions and trianions are characterized by cyclic voltammetry and UV/VIS/NIRspectroelectrochemistry. Electronic spectra are reported. The reduction of A to their dianions depends sensitively on the length of the ^-conjugated side chains and can be shifted from a stepwise process with two clearly separated waves to an electron transfer mechanism with a single "two-electron" transfer wave in the cyclic voltammogram. The compounds A with higher conjugated side groups tend to the "merging wave" behaviour. A structural evaluation of these findings is discussed. The furans A and the thiophenes exhibit electrochemichromic behaviour. Applications of A in material science chemistry arc shortly adressed.Das Elektronentransferverhalten von 2,5 disubstituierten Furanen der allgemeinen Formel A wird untersucht. Ein Vergleich mit strukturell vergleichbaren benzoiden Verbindungen, monosubstituiertem Furan, Thiophenen und Pyrroldcrivaten wird durchgeführt. Radikalanionen, Dianionen und in einzelnen Fällen auch Trianionen werden durch Cyclovoltametrie und teilweise auch UV/VIS/NIR-Spektroelektrochemie nachgewiesen und charakterisiert. Der Ablauf der reduktiven Elektronenübertragung für die Umwandlung von A in die entsprechenden Dianionen zeigt im cyclischen Voltamogramm strukturabhängiges Verhalten, das von einem Zweistufenprozeß bis zur einstufigen Zwei-Elektronenübertragung reicht. Der Zusammenhang zwischen diesem Elektronentransferverhalten und der Substratstruktur wird diskutiert. Verbindungen A mit höher konjugierten 192Josef Salbeck, Ulrich Schöberl, Knut M. Rapp and Jörg Daub Seitenketten neigen zu einem Einstufenprozeß bei der Bildung des Dianions. Die zweifachsubstituierten Furane A und Thiophene sind elektrochemichrom. Auf Anwendungen der Verbindungen wird kurz eingegangen.

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Section: Outlook and Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Effects Determining the Reductive Electron Transfer Chemistry of 2.5-Disubstituted Furans — One and “Two-electron” Transfer Behaviour Investigated by Cyclic Voltammetry and UV/VIS/NIR-Spectroelectrochemistry

Salbeck¹,

Schöberl²,

Rapp³

et al. 1991

Zeitschrift Für Physikalische Chemie

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“…Commercialization of organic semiconductors (OSCs) began with their utilization as photoconductors in copiers and laser printers, in organic light emitting diodes (OLEDs), and as antistatic coatings. [3][4][5][6] The demand for developing efficient p-conjugated organic molecules has increased manifold, especially because of their ability to coat most substrates with high mechanical robustness, maintaining their rheological properties. [7][8][9][10] Therefore emphasis lies on inexpensive synthetic procedures and improved solution processability.…”

Section: Introductionmentioning

confidence: 99%

Trends in molecular design strategies for ambient stable n-channel organic field effect transistors

2017

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aIn recent years, organic semiconducting materials have enabled technological innovation in the field of flexible electronics. Substantial optimization and development of new p-conjugated materials has resulted in the demonstration of several practical devices, particularly in displays and photoreceptors.However, applications of organic semiconductors in bipolar junction devices, e.g. rectifiers and inverters, are limited due to an imbalance in charge transport. The performance of p-channel organic semiconducting materials exceeds that of electron transport. In addition, electron transport in p-conjugated materials exhibits poorer atmospheric stability and dispersive transient photocurrents due to extrinsic carrier trapping. Thus development of air stable n-channel conjugated materials is required. New classes of materials with delocalized n-doped states are under development, aiming at improvement of the electron transport properties of organic semiconductors. In this review, we highlight the basic tenets related to the stability of n-channel organic semiconductors, primarily focusing on the thermodynamic stability of anions and summarizing the recent progress in the development of air stable electron transporting organic semiconductors. Molecular design strategies are analysed with theoretical investigations.

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“…D uring the past two decades, -conjugated polymers [1][2][3] and their oligomers [4 -6] are subjects of rising interest to both academia and industries because of their wide applications as advanced materials for electronics and photonics. They are promising candidates for these applications because of the inherent synthetic flexibility, potential ease of processing, and the possibility of tailoring characteristic properties to accomplish a desired function.…”

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confidence: 99%

The cationization mechanism study of novel oligo (p-phenyleneethynylene)s

Chen

et al. 2005

J. Am. Soc. Mass Spectrom.

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Two series of new oligo(p-phenyleneethynylene)s (OPEs) O1-O4 and O5-O8, which have been proven to be one of the chief classes of molecules mainly used as the wires and other potential backbones of molecular electronic devices, have been synthesized by stepwise synthetic approach. The characterization of these oligomers was performed on MALDI TOF MS. Different cationization salts have been applied to investigate the ionization processes of these series of oligomers under MALDI conditions. The experimental results show that these oligomers display a strong tendency to undergo radical cationization and varied ionization efficiency with different cationization agents attributable to their difference in cationic diameters. Furthermore, we found that these two series of oligomers differed in ionization properties because of their different end-groups even when the same cationization agent was used. (J Am Soc Mass Spectrom 2005, 16, 1695-1701

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Organic photoconductive materials

Cited by 109 publications

References 0 publications

Structural Effects Determining the Reductive Electron Transfer Chemistry of 2.5-Disubstituted Furans — One and “Two-electron” Transfer Behaviour Investigated by Cyclic Voltammetry and UV/VIS/NIR-Spectroelectrochemistry

Structural Effects Determining the Reductive Electron Transfer Chemistry of 2.5-Disubstituted Furans — One and “Two-electron” Transfer Behaviour Investigated by Cyclic Voltammetry and UV/VIS/NIR-Spectroelectrochemistry

Trends in molecular design strategies for ambient stable n-channel organic field effect transistors

The cationization mechanism study of novel oligo (p-phenyleneethynylene)s

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