Materials and enviromental
catalysis Researcher at the Centre of Chemistry & Biochemistry Faculty of Science, |
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2000-2003: PhD in Chemistry under supervision of Prof. Isabel Gonçalves, University of Aveiro 2004-2007: Post-doc fellow in the group of Prof. Maria José Calhorda, Faculty of Science, University of Lisbon 2008-2013: Assistant Researcher at the Centre of Chemistry &
Biochemistry, Faculty of Science, University of Lisbon 2013-Present: Associate Researcher at the Centre of Chemistry &
Biochemistry of the Faculty of Science, ULisboa 2014-Present
: Member of the Directive Board of the Centre of Chemistry
& Biochemistry (CQB), 2014-2016, Faculty of Science, ULisboa
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At this moment the main areas of interest focus on the development of new mesoporous (MCM-41 type) and lamellar (Hydrotalcite like)
materials. Synthesis and derivatisation of mesoporous
materials with coordination compounds. Development of
nanoparticles (active and passive) for catalytc
applications. Other research topics consist of organometallic chemistry and of catalysis with special emphasis on the epoxidation of olefins. The characterization techniques include solid-state NMR, FTIR, TGA and powder-XRD among others, usually necessary to accomplish an in-depth characterization of the resulting derivatized materials. The
main aim is to develop selective catalytic systems
where waste and by-products are minimized thus leading
to more environmentally friendly solutions. Additional research work is developed towards the environmental application of such systems for photocatalytic degradation of pollutants.
Projects PTDC/QUI/71576/2006: Design of new catalysts for enantiosselective oxidation catalysis AI/B7/09 CRUP PT-UK Integrated Actions (Windsor Treaty): Clustering issues in environmentally relevant compounds - the role of hydrogen bonding EXPL/QEQ-QIN/1137/2013: MAROC - Morphology-Activity Relationship in Oxidation Catalysis
Collaborations Dr. Pedro D. Vaz (ISIS Facility, Rutherford Appleton Laboratory, STFC, Oxon, UK) Dr. Olinda C. Monteiro - Interfacial electrochemisty group (CQB, FCUL) Dr.
Teresa G. Nunes - Solid state NMR (CQE, IST) Dr.
Felix Fernandez-Alonso (ISIS Facility, Rutherford
Appleton Lab., STFC, Oxon, UK) |
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Mesoporous materials MCM-41
type materials are a class of mesoporous materials
that have been discovered in the early years of
the last decade of the XXth century.
Its structure is composed of 2D channels
arranged in an hexagonal array. Recently we started to work with chiral matrix mesoporous materials. These are intended to be used in catalytic applications in asymmetric oxidation reactions.
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Hydrotalcite-type
anionic clays are lamellar materials, based on Mg (M2+)
and Al (M3+) cations, but with a wide
range of compositions (M2+ = Mg2+,
Zn2+, Ni2+ etc., M3+
= Al3+, Cr3+, Ga3+
etc) is possible. The layers are positively charged
and anions (Cl-,
NO3-, CO32-, etc...) are needed to balance this
charge. They occupy, along with water molecules, the
space between layers, and can be exchanged with
other more interesting anions, either organic or
inorganic. Such materials can be used either as bulk or as delaminated nanosheets
Left: XRD powder patterns of a
Mg-Al LDH clay intercalated with methionine before and
after coordintion to Au nanoparticles;a
scheme is also shown emphasizing the layered structure.
Right: TEM image of delaminated LDH hybrid material with
Au nanoparticles. |
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M. Nolasco, M. R. R. Felício, T. G. Nunes, P. Vaz, A. Botas, P. R. Claro, R. Ferreira, R. O. Freire, P. D. Vaz, L. D. Carlos, C. D. Nunes, Modelling the Luminescence of Extended Solids: the example of a Highly Luminescent MCM-41 Impregnated with a Eu3+ b-diketonate complex, J. Mater. Chem. C, 2014, DOI: 10.1039/C4TC01072H C. I. Fernandes, M. D. Carvalho, L. P. Ferreira, C. D. Nunes, P. D. Vaz, Organometallic Mo complex anchored to magnetic iron oxide nanoparticles as highly recyclable epoxidation catalyst, J. Organomet. Chem., 2014, 760, 2
I.
J. Marques, P. D. Vaz, A. C. Fernandes, C. D.
Nunes, Advantageous
delivery of Nifedipine from inorganic materials
showing increased solubility and
biocompatibility, Microporous
Mesoporous Mater., 2014, 183,192
C. I. Fernandes, M. S. Saraiva, T. G. Nunes, P. D. Vaz, C. D. Nunes, Highly enantioselective olefin epoxidation controlled by helical confined environments, J. Catal., 2014, 309, 21 M.
S. Saraiva, C. D. Nunes, T. G. Nunes, M. J.
Calhorda, Mo(II)
complexes of 8-aminoquinoline and their
immobilization in MCM-41, Applied
Catal. A: Gen., 2013, 455,
172
C.
I. Fernandes, C. D. Nunes, P. D. Vaz, Clays
in organic synthesis - preparation and catalytic
applications, Current Organic Synthesis (invited
article), 2012, 9,
670. N.
U. Silva, T. G. Nunes, M. S. Saraiva, M. S.
Shalamzari, P. D. Vaz, O. C. Monteiro, C. D.
Nunes, Photocatalytic
degradation of rhodamine B using Mo
heterogeneous catalysts under aerobic conditions,
Applied
Catal. B: Environ., 2012, 113-114,
180 N.
U. Silva, C. I. Fernandes, T. G. Nunes, M. S.
Saraiva, C. D. Nunes, P. D. Vaz, Performance
evaluation of mesoporous host materials in
olefin epoxidation using Mo(II) and Mo(VI)
active species: inorganic vs. hybrid matrix,
Applied
Catal. A: Gen., 2011, 408,
105 C.I.
Fernandes, N.U. Silva, P.D. Vaz, T.G. Nunes,
C.D. Nunes, Bio-inspired Mo(II) complexes as active catalysts in homogeneous and
heterogeneous olefin epoxidation,
Applied Catal A: Gen., 2010, 384,
84
P.
D. Vaz, C. D. Nunes, A
new role for layered double hydroxides hybrid
materials - uptake and delivery of small
molecules into the gas phase, New
J. Chem., 2010, 34,
541 M. S. Saraiva, C. D. Nunes, T. G. Nunes, M. J. Calhorda, The effect of immobilization on the catalytic activity of molybdenum h3-allyldicarbonyl complexes with nitrogen donor ligands bearing N-H groups, J. Mol. Catal. A, 2010, 321, 92 M.
Vasconcellos-Dias, C. D. Nunes, P. D. Vaz, P.
Ferreira, P. Brandão, V. Félix, M. J. Calhorda,
Heptacoordinate tricarbonyl Mo(II) complexes
as highly selective oxidation homogeneous and
heterogeneous catalysts, J.
Catal., 2008, 256,
301 C.
D. Nunes, P. D. Vaz, A. C. Fernandes, P. Ferreira,
C. C. Romão, M. J. Calhorda, Immobilization
of Sertraline Drug in Micro and Mesoporous
Material, Eur.
J. Pharm and Biopharm., 2007, 66,
357 P.
D. Vaz, C. D. Nunes, M. Vasconcellos-Dias, M. M.
Nolasco, P. J. A. Ribeiro Claro, M. J. Calhorda, Vibrational
study on the local structure of post-synthesis
and hybrid mesoporous materials - are there
fundamental distinctions?, Chem.
Eur. J., 2007, 13, 7874 C.
D. Nunes, P. D. Vaz, P. Brandão, J. Rocha, P.
Ferreira, N. Bion, M. J. Calhorda, Hybrid
mesoporous materials with a flexible
1,4−diazobutadiene chelating ligand. Synthesis
and Characterisation, Microporous
Mesoporous Mater., 2006, 95,
104 C. D. Nunes, A. A. Valente, M. Pillinger, J. Rocha, I. S. Gonçalves, Molecular Structure-Activity Relationships for the Oxidation of Organic Compounds using Mesoporous Silica Catalysts Derivatised with Bis(halogeno)dioxomolybdenum(vi) Complexes, Chem.- Eur. J., 2003, 9, 4380 C. D. Nunes, A. A. Valente, M. Pillinger, A. C. Fernandes, C. C. Romão, J. Rocha, I. S. Gonçalves, MCM-41 functionalized with bipyrdyil groups and its use as a support for oxomolybdenum (vi) catalyst, J. Mater. Chem., 2002, 12, 6, 1735 |
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Faculty
of Science, University of Lisbon C8
Bld., Campo Grande, Lisbon, Portugal Tel:
+351 217 500 876 (ext. 28311 or 28542) e-mail: cmnunes@ciencias.ulisboa.pt |