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13 results on '"Bonfait, Gregoire"'

4. Low-dimensional molecular metals (per)2M(mnt)2 (M = Fe and Co)

Author

Gama, Vasco, Henriques, Rui T., Bonfait, Gregoire, Pereira, Laura C., Waerenborgh, Joao C., Santos, Isabel C., Duaret, M. Teresa, Cabral, Joao M.P., and Almeida, Manuel

Subjects
Coordination compounds -- Research, Iron -- Research, Cobalt -- Research, Chemistry
Abstract

Crystals of the complex Per2M(mnt)2, where M = Fe and Co and mnt = maleonitriledithiolate, were prepared through electrocrystallization. These complexes differ from the series M = Au5, Pd5, Pt1, Ni6 and Cu6 in the doubled b parameter along the stacking axis. The residual electron density near the Fe atom is assumed to indicate the dimerization of the Fe(mnt)2 units. Per2Fe(mnt)2 consists of separate layers of perylene and Fe(mnt)2 packed like those in the other metals. The high temperatures and transport properties of both compounds are similar to the other metallic members.

Published
1992

5. (Perylene)Co(mnt)2(CH2Cl2)0.5: a mixed molecular and polymeric conductor

Author

Gama, Vasco, Henriques, Rui T., Bonfait, Gregoire, Almeida, Manuel, Meetsma, Auke, van Smaalen, Sander, and de Boer, Jan L.

Subjects
Cyclic compounds -- Research, Electrical conductivity -- Measurement, Magnetic susceptibility -- Measurement, X-ray diffractometer -- Usage, Chemistry
Abstract

Structural analysis of (perylene)Co-bis(maleonitriledithiolate)(CH2Cl2)0.5 crystals derived from the electrocrystallization of perylene and (n-C4H9)4N(Co mnt 2) revealed the presence of both molecular stacks and dimerized polymeric Co(mnt)2 chains in the crystal arrangement. This formation contributed to the high electrical conductivity of the compound. Moreover, electrical transport measurements at room temperature showed that electrical conductivity and absolute thermopower featured metallic properties at elevated temperatures.

Published
1992

8. 15K thermal buffer using liquid hydrogen

Author

Sousa, P. Borges de, Martins, D., Patrício, R., Linder, M., Catarino, Maria Isabel Simões, Bonfait, Gregoire Marie Jean, DF – Departamento de Física, and CeFITec – Centro de Física e Investigação Tecnológica

Abstract

This work is supported by the European Space Agency (ESTEC contract 4000108532/12/NL/E and by Fundação para a Ciência e Tecnologia (PTDC/EMEMFE/101448/2008 and PEst-OE/FIS/UI0068/2011). PBS and DM acknowledge the latter institution for granting. authorsversion published

Published
2000

9. The CAMCAO infrared camera.

Author

Amorim, Antonio, Melo, Antonio, Alves, Joao, Rebordao, Jose, Pinhao, Jose, Bonfait, Gregoire, Lima, Jorge, Barros, Rui, Fernandes, Rui, Catarino, Isabel, Carvalho, Marta, Marques, Rui, Poncet, Jean-Marc, Duarte Santos, Filipe, Finger, Gert, Hubin, Norbert, Huster, Gotthard, Koch, Franz, Lizon, Jean-Louis, and Marchetti, Enrico

Published
2004
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