排序方式: 共有6条查询结果,搜索用时 15 毫秒
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Dr. Oliver Guillermet Dr. Ather Mahmood Dr. Jianshu Yang Dr. Jorge Echeverria Judicael Jeannoutot Dr. Sebastien Gauthier Dr. Christian Joachim Dr. Frederic Chérioux Prof. Dr. Frank Palmino 《Chemphyschem》2014,15(2):271-275
Thermally activated rotation of single molecules adsorbed on a silicon‐based surface between 77 and 150 K has been successfully achieved. This remarkable phenomenon relies on a nanoporous supramolecular network, which acts as a template to seed periodic molecule rotors on the surface. Thermal activation of rotation has been demonstrated by STM experiments and confirmed by theoretical calculations. 相似文献
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Inside Cover: Seeding Molecular Rotators on a Passivated Silicon Surface (ChemPhysChem 2/2014)
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Anjaramampionona Henintsoa Duvale Solofomalala Clara Fredeline Rajemiarimoelisoa Randriamampianina Lovarintsoa Judicael Hanitra Ranjana Randrianarivo Danielle Aurore Doll Rakoto Victor Louis Jeannoda Ahcne Boumendjel 《Molecules (Basel, Switzerland)》2021,26(11)
Seeds of Crotalaria cleomifolia (Fabaceae) are consumed in Madagascar in preparation of popular beverages. The investigation of extracts from the seeds of this species revealed the presence of high amounts of alkaloids from which two pyrrolizidine-derived alkaloids were isolated. One of them was fully characterized by spectroscopic and spectrometric methods, which was found to be usaramine. Owing to the high toxicity of these alkaloids, issuing a strong warning among populations consuming the seeds of Crotalaria cleomifolia must be considered. 相似文献
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Younes Makoudi Judicaël Jeannoutot Frank Palmino Frédéric Chérioux Guillaume Copie Christophe Krzeminski Fabrizio Cleri Bruno Grandidier 《Surface Science Reports》2017,72(4):316-349
Understanding the physical and chemical processes in which local interactions lead to ordered structures is of particular relevance to the realization of supramolecular architectures on surfaces. While spectacular patterns have been demonstrated on metal surfaces, there have been fewer studies of the spontaneous organization of supramolecular networks on semiconductor surfaces, where the formation of covalent bonds between organics and adatoms usually hamper the diffusion of molecules and their subsequent interactions with each other. However, the saturation of the dangling bonds at a semiconductor surface is known to make them inert and offers a unique way for the engineering of molecular patterns on these surfaces. This review describes the physicochemical properties of the passivated B-Si(111)-(√3x√3) R30° surface, that enable the self-assembly of molecules into a rich variety of extended and regular structures on silicon. Particular attention is given to computational methods based on multi-scale simulations that allow to rationalize the relative contribution of the dispersion forces involved in the self-assembled networks observed with scanning tunneling microscopy. A summary of state of the art studies, where a fine tuning of the molecular network topology has been achieved, sheds light on new frontiers for exploiting the construction of supramolecular structures on semiconductor surfaces. 相似文献
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Dr. Elie Geagea Ali Hamadeh Judicaël Jeannoutot Prof. Dr. Frank Palmino Nicolas Breault Prof. Dr. Alain Rochefort Dr. Samar Hajjar-Garreau Prof. Dr. Carmelo Pirri Prof. Dr. Christophe M. Thomas Dr. Frédéric Chérioux 《Chemphyschem》2023,24(15):e202300182
We demonstrate that the strong N2 bond can be efficiently dissociated at low pressure and ambient temperature on a Si(111)-7x7 surface. The reaction was experimentally investigated by scanning tunnelling microscopy and X-ray photoemission spectroscopy. Experimental and density functional theory results suggest that relatively low thermal energy collision of N2 with the surface can facilitate electron transfer from the Si(111)-7x7 surface to the π*-antibonding orbitals of N2 that significantly weaken the N2 bond. This activated N2 triple bond dissociation on the surface leads to the formation of a Si3N interface. 相似文献
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