71,294 research outputs found
Contrasting Photoelectrochemical Behaviour Of Two Isomeric Supramolecular Dyes Based On Meso-tetra(pyridyl)porphyrin Incorporating Four (μ3-oxo)- Triruthenium(iii) Clusters
A saddle shaped tetracluster porphyrin species containing four [Ru 3O(OAc)6(py)2]+ clusters coordinated to the N-pyridyl atoms of 5,10,15,20-tetra(3-pyridyl)porphyrin, H 2(3-TCPyP), has been investigated in comparison with the planar tetra(4-pyridyl)porphyrin analogue H2(4-TCPyP). The steric effects from the bulky peripheral complexes play a critical role in the H 2(3-TCPyP) species, determining a non-planar configuration around the porphyrin centre and precluding any significant π-electronic coupling, in contrast with the less hindered H2(4-TCPyP) species. Both systems exhibit a photoelectrochemical response in the presence of nanocrystalline TiO2 films, involving the porphyrin excitation around 450 nm. However, only in the H2(4-TCPyP) case do the cluster moieties also contribute to the photoinduced electron injection process at 670 nm, reflecting the relevance of the electronic coupling between the porphyrin centre and the peripheral complexes. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.32711671174Araki, K., Toma, H.E., Supramolecular porphyrins as electrocatalysts, in (2006) N-4 Macrocyclic Metal Complexes, Ed., , J. H. Zagal, F. Bedioui and J.-P. Dodelet, Springer, pp. 255-302Toma, H.E., Araki, K., (2000) Coord. Chem. Rev., 196, p. 307Latos-Grazynski, L., Rachlewicz, K., Wojaczynski, J., (1999) Coord. Chem. Rev., 192, p. 109Imamura, T., Fukushima, K., (2000) Coord. Chem. Rev., 198, p. 133Sanders In, J.K.M., (2000) The Porphyrin Handbook, Ed., , K. M. Kadish, et al., Academic Press, New YorkChambron, J.C., Heitz, V., Sauvage In, J.P., (2000) The Porphyrin Handbook, Ed., , K. M. Kadish, et al., Academic Press, New YorkBaldini, L., Hunter, C.A., (2002) Advances in Inorganic Chemistry, Vol. 53Prodi, A., Indelli, M.T., Kleverlaan, C.J., Alessio, E., Scandola, F., (2002) Coord. Chem. Rev., 229, p. 51Rea, N., Loock, B., Lexa, D., (2001) Inorg. Chim. Acta, 312, p. 53Mayer, I., Nunes, G., Toma, H.E., (2006) Eur. J. Inorg. Chem., 4, p. 850Quintino, M.S., Araki, K., Toma, H.E., (2006) Talanta, 4 (68), p. 1281Winnischofer, H., Toma, H.E., Araki, K., (2006) J. Nanosci. Nanotechnol., 6, p. 1701Mayer, I., Nakamura, M., Toma, H.E., Araki, K., (2006) Electrochim. Acta, 52, p. 263Toma, H.E., Araki, K., (1990) J. Chem. Res. (S), p. 82Mayer, I., Formiga, A.L.B., Engelmann, F., Winnischofer, H., Oliveira, P.V., Tomazella, D.M., Toma, H.E., Araki, K., (2005) Inorg. Chim. Acta, 358, p. 2629Quintino, M.S., Winnischofer, H., Nakamura, M., Toma, H.E., Araki, K., Angnes, L., (2005) Anal. Chim. Acta, 539, p. 215Nunes, G., Mayer, I., Toma, H.E., Araki, K., (2005) J. Catal., 236, p. 55Araki, K., Winnischofer, H., Viana, H.E., Toyama, M.M., Engelmann, F., Mayer, I., Formiga, A.L.B., Toma, H.E., (2004) J. Electroanal. Chem., 562, p. 145Toma, H.E., Araki, K., Alexiou, A.D.P., Nikolaou, S., Dovidauskas, S., (2001) Coord. Chem. Rev., 219, p. 187Toma, H.E., Cipriano, C., (1989) J. Electroanal. Chem., 263, p. 313Toma, H.E., Matsumoto, F.M., Cipriano, C., (1993) J. Electroanal. Chem., 346, p. 261Toma, H.E., Araki, K., Silva, E.O., (1998) Monatsh. Chem., 129, p. 975Dovidauskas, S., Toma, H.E., Araki, K., Sacco, H.C., Iamamoto, Y., (2000) Inorg. Chim. Acta, 305, p. 206Araki, K., Dovidauskas, S., Winnischofer, H., Alexiou, A.D.P., Toma, H.E., (2001) J. Electroanal. Chem., 498, p. 152Winnischofer, H., Otake, V.Y., Dovidauskas, S., Nakamura, M., Araki, K., Toma, H.E., (2004) Electrochim. Acta, 49, p. 3711Sawyer, D.T., Roberts, J.L., (1974) Experimental Electrochemistry for Chemists, , WileyAdler, A.D., Longo, F.R., Finarell d, J., Goldmach, J., Assour, J., Korsakof, L., (1967) J. Org. Chem., 32, p. 476Kalyanasundaram, K., (1984) Inorg. Chem., 23, p. 2453Nazeeruddin, M.K., Kay, A., Humphry-Baker, R., Muller, E., Liska, P., Vanchopoulos, N., Grätzel, M., (1993) J. Am. Chem. Soc., 115, p. 6382Araki, K., Toma, H.E., (2002) Cur. Org. Chem., 6, p. 21Araki, K., Toma, H.E., (1993) J. Coord. Chem., 30, p. 9Meot-Ner, M., Adler, A.D., (1975) J. Am. Chem. Soc., 97, p. 5107Gouterman, M., (1961) J. Mol. Spectrosc., 6, p. 138Gouterman, M., Snyder, L.C., Wagniere, G.H., (1963) J. Mol. Spectrosc., 11, p. 108Baumann, J.A., Salmon, D.J., Wilson, S.T., Meyer, T.J., Hatfield, W.E., (1978) Inorg. Chem., 17, p. 3342Alexiou, A.D.P., Toma, H.E., (1997) J. Chem. Res. (S), p. 338Toma, H.E., Alexiou, A.D.P., (1995) J. Chem. Res. (S), p. 134Janson, T.R., Katz In, J.J., (1979) Nuclear Magnetic Resonance of Diamagnetic Porphyrins, Ed., , D. Dolphin, Academic PressChernook, A.V., Rempel, U., Vonborczyskowski, C., Shulga, A.M., Zenkevich, E.I., (1996) Chem. Phys. Lett., 254, p. 229Alessio, E., Geremia, S., Mestroni, S., Iengo, E., Srnova, I., Slouf, M., (1999) Inorg. Chem., 38, p. 869Alessio, E., Geremia, S., Mestroni, S., Srnova, I., Slouf, M., Gianferrara, T., Prodi, A., (1999) Inorg. Chem., 38, p. 2527Fleischer, E.B., Shachter, A.M., (1991) Inorg. Chem., 30, p. 3763Alexiou, A.D.P., Toma, H.E., (1993) J. Chem. Res. (S), p. 464O'Reagan, B., Grätzel, M., (1991) Nature, 353, p. 737Nazeeruddin, M.K., Humphry-Baker, R., Liska, P., Gratzel, M., (2003) J. Phys. Chem. B, 107, p. 8981Wang, P., Zekeeruddin, S.M., Moser, J.E., Humphry-Baker, R., Comte, P., Aranyos, V., Hagdeldt, A., Gratzel, M., (2003) Adv. Mater., 16, p. 1806Haque, S.A., Palomares, E., Cho, B.M., Green, A.N.M., Hirata, N., Klug, K.R., Durrant, J.R., (2005) J. Am. Chem. Soc., 127, p. 3456Tributsch, H., (2004) Coord. Chem. Rev., 248, p. 1511Wurfel, U., Wagner, J., Hinsch, A., (2005) J. Phys. Chem. B, 109, p. 20444Durr, M., Bamedi, A., Yasuda, A., Nelles, G., (2004) Appl. Phys. Let., 84, p. 3397Kroon, J.M., Bakker, N.J., Smit, H.S.P., Liska, P., Thampi, K.R., Wang, P., Zakeeruddin, S.M., Tulloch, G.E., (2007) Prog. Photovolt: Res. Appl., 15, p. 1Bignozzi, C.A., Argazzi, R., Indelli, M.T., Scandola, F., (1994) Sol. Energy Mater. Sol. Cells, 32, p. 229Haque, D.S., Handa, S., Peter, K., Palomares, E., Thelakkat, M., Durrant, J.R., (2005) Angew. Chem., Int. Ed., 44, p. 5740Nogueira, A.F., Toma, S.H., Vidotti, M., Formiga, A.L.B., Torresi, S.I.C., Toma, H.E., (2005) New J. Chem., 29, p. 320Nogueira, A.F., Furtado, L.F.O., Formiga, A.L.B., Toma, H.E., (2004) Inorg. Chem., 43, p. 396Nogueira, A.F., Formiga, A.L.B., Winnischofer, H., Toma, H.E., (2004) Photochem. Photobiol. Sci, 3, p. 56Furtado, L.F.O., Alexiou, A.D.P., Gonçalves, L., Toma, H.E., Araki, K., (2006) Angew. Chem., Int. Ed., 45, p. 314
Classification of a family of non almost periodic free Araki-Woods factors
We obtain a complete classification of a large class of non almost periodic
free Araki-Woods factors up to isomorphism. We do this by
showing that free Araki-Woods factors arising from finite
symmetric Borel measures on whose atomic part is
nonzero and not concentrated on have the joint measure class as an invariant. Our key technical result
is a deformation/rigidity criterion for the unitary conjugacy of two faithful
normal states. We use this to also deduce rigidity and classification theorems
for free product von Neumann algebras.Comment: v2: minor changes, final version, to appear in Journal of the
European Mathematical Societ
Additivity of Entangled Channel Capacity for Quantum Input States
An elementary introduction into algebraic approach to unified quantum
information theory and operational approach to quantum entanglement as
generalized encoding is given. After introducing compound quantum state and two
types of informational divergences, namely, Araki-Umegaki (a-type) and of
Belavkin-Staszewski (b-type) quantum relative entropic information, this paper
treats two types of quantum mutual information via entanglement and defines two
types of corresponding quantum channel capacities as the supremum via the
generalized encodings. It proves the additivity property of quantum channel
capacities via entanglement, which extends the earlier results of V. P.
Belavkin to products of arbitrary quantum channels for quantum relative entropy
of any type.Comment: 17 pages. See the related papers at
http://www.maths.nott.ac.uk/personal/vpb/research/ent_com.htm
- …