Relevant bibliographies by topics / Tetrathia[7]helicene

Academic literature on the topic 'Tetrathia[7]helicene'

Author: Grafiati
Published: 9 March 2023
Last updated: 10 March 2023

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Journal articles on the topic "Tetrathia[7]helicene"

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Kim, Choongik, Tobin J. Marks, Antonio Facchetti, Michele Schiavo, Alberto Bossi, Stefano Maiorana, Emanuela Licandro, et al. "Synthesis, characterization, and transistor response of tetrathia-[7]-helicene precursors and derivatives." Organic Electronics 10, no. 8 (December 2009): 1511–20. http://dx.doi.org/10.1016/j.orgel.2009.08.018.

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Koudjina, Simplice, Wilfried G. Kanhounnon, Gaston A. Kpotin, Nobel Kouakou N’Guessan, and Guy Y. S. Atohoun. "Conceptions of Vibrational Signatures Based on Chiral/Helical Functionalized Helicenes Nanostructures: Analyzed of Normal and Identical Modes." Mediterranean Journal of Chemistry 10, no. 8 (August 25, 2020): 761. http://dx.doi.org/10.13171/mjc10802008251507sk.

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Optoelectronics properties as helical molecular fingerprints have been investigated on a set of Helicenes molecules, which form a particular class of compounds and exhibit both π-electron delocalization and chiral properties. In this paper, we investigate the IR and Raman signatures of four representative Helicenes: Hexahilicene (Hexa-Helicene), tetrathia-[7]-helicene (Helicene-4S), and its pyrrole (Helicene-4N) and furan analogs (Helicene-4O), under the visible wavelength of 532 nm. Correctly, the impact of the method of calculation on these signatures has been pointed out. The simulation of the IR and Raman signatures involves two different steps: the evaluation of the vibrational frequencies and normal modes and the calculation of the Cartesian derivatives of electric properties. While most of the time, all the quantities are evaluated with a single method, we believe that this should not be the case since both steps have not the same requirements in terms of computational methods. Density functional theory has been then used with different exchange-correlation functional and Coupled Perturbed Time-Dependent Hartree-Fock (CP-TDHF) for the electric properties investigations. It comes out of the results that B3LYP, B3P86, and PBE0, reproduces better experimental spectra. The impact of the electron correlation as view one the XC functional on the evaluation of the Cartesian derivatives of the electric properties were found to be somewhat limited. Overall, the most crucial point is to have an accurate description of the normal vibrational modes via the choice of appropriate XC functionals, which describe the experiment results.
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Garcia, Maria Helena, Pedro Florindo, Maria de Fátima M. Piedade, Stefano Maiorana, and Emanuela Licandro. "New organometallic Ru(II) and Fe(II) complexes with tetrathia-[7]-helicene derivative ligands." Polyhedron 28, no. 3 (February 2009): 621–29. http://dx.doi.org/10.1016/j.poly.2008.12.036.

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Clays, Koen, Kurt Wostyn, André Persoons, Stefano Maiorana, Antonio Papagni, Claude A. Daul, and Valery Weber. "Experimental study of the second-order non-linear optical properties of tetrathia-[7]-helicene." Chemical Physics Letters 372, no. 3-4 (April 2003): 438–42. http://dx.doi.org/10.1016/s0009-2614(03)00437-8.

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Rose-Munch, Françoise, Ming Li, Eric Rose, Jean Claude Daran, Alberto Bossi, Emanuela Licandro, and Patrizia Romana Mussini. "Tetrathia[7]helicene-Based Complexes of Ferrocene and (η5-Cyclohexadienyl)tricarbonylmanganese: Synthesis and Electrochemical Studies." Organometallics 31, no. 1 (December 16, 2011): 92–104. http://dx.doi.org/10.1021/om200571a.

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Dova, Davide, Lucia Viglianti, Patrizia R. Mussini, Stefan Prager, Andreas Dreuw, Arnaud Voituriez, Emanuela Licandro, and Silvia Cauteruccio. "Tetrathia[7]helicene Phosphorus Derivatives: Experimental and Theoretical Investigations of Electronic Properties, and Preliminary Applications as Organocatalysts." Asian Journal of Organic Chemistry 5, no. 4 (February 25, 2016): 537–49. http://dx.doi.org/10.1002/ajoc.201600025.

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Maiorana, Stefano, Antonio Papagni, Emanuela Licandro, Rita Annunziata, Piero Paravidino, Dario Perdicchia, Clelia Giannini, Marco Bencini, Koen Clays, and André Persoons. "A convenient procedure for the synthesis of tetrathia-[7]-helicene and the selective α-functionalisation of terminal thiophene ring." Tetrahedron 59, no. 34 (August 2003): 6481–88. http://dx.doi.org/10.1016/s0040-4020(03)01056-1.

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Menduti, Luigi, Clara Baldoli, Simone Manetto, Michael Bolte, Hans-Wolfram Lerner, Giovanna Longhi, Claudio Villani, Emanuela Licandro, and Matthias Wagner. "(BO)2‐Doped Tetrathia[7]helicene: A Configurationally Stable Blue Emitter." Angewandte Chemie International Edition, November 21, 2022. http://dx.doi.org/10.1002/anie.202215468.

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Menduti, Luigi, Clara Baldoli, Simone Manetto, Michael Bolte, Hans-Wolfram Lerner, Giovanna Longhi, Claudio Villani, Emanuela Licandro, and Matthias Wagner. "(BO)2‐Doped Tetrathia[7]helicene: A Configurationally Stable Blue Emitter." Angewandte Chemie, November 21, 2022. http://dx.doi.org/10.1002/ange.202215468.

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Maiorana, Stefano, Antonio Papagni, Emanuela Licandro, Rita Annunziata, Piero Paravidino, Dario Perdicchia, Clelia Giannini, Marco Bencini, Koen Clays, and Andre Persoons. "A Convenient Procedure for the Synthesis of Tetrathia-[7]-helicene and the Selective α-Functionalization of Terminal Thiophene Ring." ChemInform 34, no. 48 (December 2, 2003). http://dx.doi.org/10.1002/chin.200348108.

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Dissertations / Theses on the topic "Tetrathia[7]helicene"

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PELLICCIOLI, VALENTINA. "HETEROHELICENES AS APPEALING CHIRAL SYSTEMS: INNOVATIVE METHODOLOGIES FOR THEIR PREPARATION ALSO IN ENANTIOMERICALLY PURE FORM." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/820983.

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Abstract:
Helicenes are ortho-annulated polycyclic aromatic or heteroaromatic compounds, endowed with inherent chirality owing to the helical shape of their π-conjugated system. Carbohelicenes only include benzene rings in their structure, while in heterohelicenes one or more heterocycles are present. Interestingly, the introduction of heteroatoms into the fused polycyclic frameworks adds remarkable changes to the electronic structures of helicenes, and additional chemical and physical properties. Their unique structural features and physicochemical properties have stimulated manifold studies in several fields, including optoelectronics, material science, asymmetric catalysis, and chiral recognition. Many of these applications require the use of enantiomerically pure helicenes, although the resolution of racemates by means of analytical methods as well as the separation of diastereomers still remain the most common ways to obtain non-racemic helicenes, whose peculiar geometry makes them extremely difficult targets for stereoselective synthesis. This Ph.D. thesis was intended to provide a meaningful contribution in the development of innovative and versatile syntheses of heterohelicenes, also in enantiopure form, and has focused on the following main goals: 1. Study of methodologies for the synthesis of functionalised tetrathia[7]helicenes (7-THs). 2. Synthesis of different classes of thiahelicenes through methodologies set up for the preparation of 7-THs. 3. Enantioselective synthesis of thia[5]helicenes via Au-catalysed alkyne hydroarylation. In the course of this thesis, a sub-topic has also been developed: 4. Functionalisation of benzo[1,2-b:4,3-b']dithiophenes by Suzuki reactions in Deep Eutectic Solvents (DESs).
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