Browsing by Author "dac5906b-eaae-481b-b387-be6dee508808"
Now showing items 1-20 of 20
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Díaz Valenzuela, Carlos; Valenzuela, María Luisa; Barbosa, Miguel (2004)Incorporation of the organometallic fragments MLn = CpFe(dppe)I and CpRu(PPh3)2Cl to the random copolymers [{NP(O 2C12H8)}0.8{NP(OC6H 4CH2CN)2}0.15{NP(OC 6H4CH2CN)(OC6H5)} 0.05]n (1) [{NP(O2C12H 8)}0.55{NP(OC6H4CH ...
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Díaz Valenzuela, Carlos; Valenzuela, M. L.; Bobadilla, D.; Laguna Bercero, M. A. (Springer, 2017)Bimetallic Au/Ag nanostructures have been included inside SiO2 by pyrolysis of the macromolecular complexes Chitosan center dot(MLn/M'Ln)(n)center dot SiO2 and PSP-4-PVP center dot(MLn/M'Ln)(n)center dot SiO2 with MLn = ...
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Díaz Valenzuela, Carlos; Valenzuela, María Luisa (2007)
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Díaz Valenzuela, Carlos; Valenzuela, M. L.; Cifuentes Vaca, O.; Segovia, Marjorie; Laguna Bercero, M. A. (Springer, 2020)ReO3 were prepared by thermal treatment of the macromolecular Chitosan center dot(ReCl3)(X) and PSP-4-PVP center dot(ReCl3)(X) precursors. The plasmon band in the visible region for the as obtained ReO3 from their visible ...
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Jiménez, Josefina; Laguna, Antonio; Benouazzane, Mohamed; Sanz, Jose Antonio; Díaz Valenzuela, Carlos; Valenzuela, María Luisa; Jones, Peter G. (2009)A cyclotriphosphazene bearing two 4-oxypyridine groups on the same phosphorus atom, gem-[N3P3(O2C 12H8)2(OC5H4N-4) 2] (I), and its analogous polymer [[NP-(O2C 12H4)UNP(OC5H4NM)2) 0.3]n (II), have been used to prepare gold ...
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Díaz Valenzuela, Carlos; Valenzuela, María Luisa; Yutronic Sáez, Nicolás; Villalobos, Valeria; Barrera, Gonzalo (2011)Pyrolysis of molecular precursors containing vanadium organometallic and cyclic phosphazene affords mixtures of nanostructured vanadium oxides and pyrophosphates. The products from the molecular precursor [N3P3(OC6H5)5OC ...
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Polyphosphazenes as solid templates for the formation of monometallic and bimetallic nanostructures Díaz Valenzuela, Carlos; Valenzuela, María Luisa; Yutronic Sáez, Nicolás (2007)A simple synthetic route to monometallic and bimetallic nanostructured materials is presented. Pyrolysis of the organometallic iron co-polyphosphazenes, [{[N = P(R 1) 2] 0.8[N = P(OC 6H 4CH 2CN[Fe]) 2] 0.15}{PF 6} 0.32] n ...
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González Moraga, Guillermo; Díaz Valenzuela, Carlos; Copaja, Sylvia (Springer-Verlag, 1983)Reactions of bis(diethylamino) and dimorpholinosulfane with [Cu(H2O)6](ClO4)2 in acetonitrile and with CuCl2·2H2O in ethanol yield Cu(I) compounds and SO2. The reaction product of dimorpholinosulfane and CuCl2 in ethanol ...
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Díaz Valenzuela, Carlos (1991)N,N′-dithiobisamines, R2N-S-S-NR2, NR2N(CH3)2, N(CH2CH3)2, {A figure is presented}, {A figure is presented} or N(CH2-C6H5)2, are oxidized to SO2 by copper(II) salts with formation of copper(I) complexes, while from the ...
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Solid state pathways to complex shape evolution and tunable porosity during metallic crystal growth Díaz Valenzuela, Carlos; Carriedo, Gabino A.; Valenzuela, María Luisa; Zúñiga, Luis; O'Dwyer, Colm (Nature Publishing Group, 2013)Growing complex metallic crystals, supported high index facet nanocrystal composites and tunable porosity metals, and exploiting factors that influence shape and morphology is crucial in many exciting developments in ...
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Díaz Valenzuela, Carlos; Valenzuela, M. L.; García, C.; Campa, R. de la; Presa Soto, A. (Elsevier, 2017)We herein reports the solid-state synthesis of pure and doped lanthanide oxides by using polymeric materials (chitosan and polystyrene-co-poly(4-vinylpyridine), PS-co-P4VP) as a solid template. Lanthanide nanomaterials are ...
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Díaz Valenzuela, Carlos; Valenzuela, M. L.; Segovia, M.; Correa, K.; Campa, R. de la; Presa Soto, A. (Springer, 2018)Nanostructure luminescent ZnO and SnO2 materials are prepared by a two-step solid-state method based on the solution preparation of the macromolecular precursors ZnCl2 center dot Chitosan and SnCl2 center dot Chitosan ...
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Díaz Valenzuela, Carlos; Barrientos, Lorena; Carrillo, Daniel; Valdebenito, Javier; Valenzuela, María L.; Allende, Patricio; Geaney, Hugh; O’Dwyer, Colm (Royal Soc Chemistry, 2016)We report a method for solvent-less growth of single crystalline hematite Fe2O3 nanoparticles from metal-containing polymeric macromolecular complexes, and demonstrate their efficient photocatalytic degradation of persistent ...
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Díaz Valenzuela, Carlos; Valenzuela, M.L.; Laguna Becerro, M.A.; Orera, A.; Bobadilla, D.; Abarca, S.; Peña, O. (Royal Soc Chemistry, 2017)The simple reaction of chitosan with metallic salts yields (chitosan) (MLn)(x), MLn = MnCl2, CoCl2, NiCl2, macromolecular complexes which, after a thermal treatment at 800 degrees C under air, give nanostructured Mn2O3, ...
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Carriedo, Gabino A.; García Alonso, Francisco Javier; González, Pedro A.; Díaz Valenzuela, Carlos; Yutronic Sáez, Nicolás (Elsevier Ltd, 2002)The reactions of the cyclic phosphazenes [N3P3Cl6] and [N3P3(O2C12H8)2Cl2] (O2C12H8 /2,2?-dioxybiphenyl) with the diphenylphosphine phenol complex {Mn(CO)2(h5 -C5H4Me)[PPh2(C6H4 /OH)]} (1) and Cs2CO3 in refluxing acetone ...
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Carriedo, Gabino A.; García Alonso, Francisco Javier; García Álvarez, J. Luis; Díaz Valenzuela, Carlos; Yutronic Sáez, Nicolás (Elsevier Ltd, 2002)The polyspirophosphazene copolymer {[NP(O2C12H8)]0.7[NP(OC5H4N)2]0.3}n (2); that carries pyridine side groups has been prepared from [NPCl2]n , by reaction first with 2,2?-dihydroxybiphenyl and potassium carbonate in THF ...
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Synthesis of nanostructured materials by a new solid state pyrolysis organometallic polymer method Díaz Valenzuela, Carlos; Valenzuela, Maria Luisa (2005)In this study, the preparation of nanostructured particles of metal/metal oxides by using a pyrolysis of organometallic polyphosphazenes having the metal anchored to the polymeric chain is described. The elaboration process ...
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Carriedo, Gabino A.; García Alonso, Francisco Javier; Gomez-Elipe, P.; Díaz Valenzuela, Carlos; Yutronic Sáez, Nicolás (2003)The high molecular weight phosphazene random copolymer {[NP(OC 6H5)2]0.94 [NP(OC6H 5)(OC6H4CNFe(dppe)CP)]0.06[PF 6]0.06}n (1), that carries [Fe(dppe)Cp] cationic fragments coordinated to nitrile side groups, has been ...
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Díaz Valenzuela, Carlos; Valenzuela, María Luisa; Carrillo, Daniel; Riquelme, J.; Díaz, Renato (2012)Organometallic derivatives of the cyclotriphosphazene N 3P 3[OC 6H 4CH 2CN·TiClCp 2] 6(1), N 3P 3(O 6H 5) 5[OC 6H 4N·W(CO) 5] (2), N 3P 3[OC 6H 4CH 2CN·Mo(CO) 5] 6(3), [N 3P 3(O 6H 5) 5(OC 5H 4N·CpRu(PPh 3) 2)][PF 6] (4), ...
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Díaz Valenzuela, Carlos; Valenzuela, Carlos (2002)The series of complexes [N3P3(OC6H5)5 OC6H4CH2CN·MCln] PF6, N3P3(OC6H4CH2 CN)6·(MCln)6] (PF6)6, [N3P3(OC6H5)5 OC6H4CH2CN·MCln-1]Cl and [N3P3(OC6H4CH2 CN)6·(MCln-1)6]Cl6, MCln = MnCl2, FeCl3, COCl2, NiCl2, CuCl2 have been ...