A5035890810- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal complexes synthesis and properties
- Oxidative Organic Chemistry Reactions
- Metal-Organic Frameworks: Synthesis and Applications
- Magnetism in coordination complexes
- Crystallography and molecular interactions
- Chemical Synthesis and Reactions
- Metal-Catalyzed Oxygenation Mechanisms
- Catalytic C–H Functionalization Methods
- Synthesis and Catalytic Reactions
- Synthesis and Biological Evaluation
- Crystal structures of chemical compounds
- Synthesis and Characterization of Heterocyclic Compounds
- Chemical Reaction Mechanisms
- Vanadium and Halogenation Chemistry
- Porphyrin and Phthalocyanine Chemistry
- Inorganic and Organometallic Chemistry
- Free Radicals and Antioxidants
- Chemical Synthesis and Analysis
- Synthesis and biological activity
- Organometallic Compounds Synthesis and Characterization
- Asymmetric Hydrogenation and Catalysis
- Lanthanide and Transition Metal Complexes
- Catalysis and Oxidation Reactions
University of Lisbon
2013-2022
Instituto Superior Técnico
2008-2019
Instituto Politécnico de Lisboa
2001-2019
Rede de Química e Tecnologia
2016-2019
Institute for Complex Systems
2019
Immanuel Kant Baltic Federal University
2016
Baku State University
2013-2014
Polytechnic Institute of Porto
2011-2014
Universidad de La Laguna
2007-2008
Universidade Lusófona
2007
This Perspective highlights the use of chalcogen bonding as a versatile synthon for synthesis, catalysis and construction both organic inorganic materials.
Rich activity from a few coppers: Di-, tri-, tetra-, and polynuclear copper triethanolamine complexes are easily prepared selective efficient catalysts for alkane peroxidative oxidation under mild conditions (see picture). Supporting information this article is available on the WWW http://www.wiley-vch.de/contents/jc_2002/2005/z500585_s.pdf or author. Please note: The publisher not responsible content functionality of any supporting supplied by authors. Any queries (other than missing...
Abstract The mono‐, di‐, tri‐, tetra‐ and polynuclear copper(II) triethanolamine (H 3 tea) complexes [Cu(H 2 tea)(N )] ( 1 ), [Cu (XC 6 H 4 COO) ]⋅2 O (X=4‐H 2a , 4‐CH 2b 3‐Cl 2c (4‐OC O)]⋅4H [O⊂Cu (tea) (BOH) ][BF ] ) {μ‐C (COO) ‐1,4} n 5 respectively, are highly active selective catalysts or catalyst precursors for the peroxidative oxidation of cyclohexane, in acetonitrile, to a cyclohexanol cyclohexanone mixture, by aqueous hydrogen peroxide acidic medium (liquid biphasic catalysis) at...
Self-assembly synthesis in water, at room temperature, with dinuclear copper triethanolaminate and aqua−sodium building blocks as well benzene-1,2,4,5-tetracarboxylate linkers leads to the formation of an heteronuclear Cu−Na assembly a two-dimensional metal−organic framework, providing first example aqua-soluble copper-containing coordination polymer that hosts infinite chains decameric water clusters (H2O)10 formed by quasiplanar cyclic octamers two pendent molecules.
The new copper(II) or copper(II)/sodium(I) 1D coordination polymers [Cu2(Hmdea)2(μ-H2O)(μ2-tpa)]n·2nH2O (1), [Cu2(H2tipa)2(μ2-ipa)]n·4nH2O (2), [Cu2(H2tea)2Na(H2O)2(μ2-tma)]n·6nH2O (3), [Cu2(H2tea)2(μ2-ipa)]n·nH2O (4a), and [Cu2(H2tea)2{μ3-Na(H2O)3}(μ3-ipa)]n(NO3)n·0.5nH2O (4b) have been prepared in aqueous medium by self-assembly from nitrate, aminopolyalcohols [methyldiethanolamine (H2mdea), triisopropanolamine (H3tipa), triethanolamine (H3tea)] as main chelating ligands...
New hydrazone o-HO-phenylhydrazo-β-diketones (OHADB), R1NHN═CR2R3 [R1 = HO-2-C6H4, R2 R3 COMe (H2L1, 1), R2R3 COCH2C(Me)2CH2CO (H2L2, 2), COMe, COOEt (H2L4, 4); R1 HO-2-O2N-4-C6H3, (H2L3, 3), (H2L5, 5), (H2L6, 6A)], and their Cu(II) complexes [Cu2(CH3OH)2(μ-L1)2] 7, [Cu2(H2O)2(μ-L2)2] 8, [Cu(H2O)(L3)] 9, [Cu2(μ-L4)2]n 10, [Cu(H2O)(L5)] 11, [Cu2(H2O)2(μ-L6)2] 12A [Cu(H2O)2(L6)] 12B were synthesized fully characterized, namely, by X-ray analysis (4, 5, 7−12B). Reaction of 6A, Cu(NO3)2...
A one-pot template condensation of 2-(2-(dicyanomethylene)hydrazinyl)benzenesulfonic acid (H(2)L(1), 1) or 2-(2-(dicyanomethylene)hydrazinyl)benzoic (H(2)L(2), 2) with methanol (a), ethylenediamine (b), ethanol (c) water (d) on copper(II), led to a variety metal complexes, that is, mononuclear [Cu(H(2)O)(2)(κO(1),κN(2)L(1a)] (3) and [Cu(H(2)O)(κO(1),κN(3)L(1b))] (4), tetranuclear [Cu(4)(1κO(1),κN(2):2κO(1)L(2a))(3)-(1κO(1), κN(2):2κO(2)L(2a))] (5), [Cu(2)(H(2)O)(1κO(1),...
Abstract In this review, we attempt to answer the question: how can construct complex functionalized molecules with significant added value from cheap and readily available alcohols in simplest most efficient manner? Accordingly, recent developments (mainly last five years) field of one‐pot multiple transformations are overviewed terms process simplification optimization; sustainability; atom, bond, step, redox economy. Particular attention is paid chemo‐ stereoselective specific formation...
The hydrolysis of sterically hindered and unhindered alkyl nitriles, also benzyl phenyl nitriles RCN (R = Me, CH(2)Cl, Et, n-Pr, i-Pr, n-Bu, t-Bu, p-MeOC(6)H(4)CH(2), Ph), to carboxamides is catalyzed by a novel system superior simplicity consisting cheap, widely commercially available, rather environmentally friendly compounds, that is, ZnX(2)/ketoxime combination, but it does not proceed at all with either the zinc salt or ketoxime taken alone. nature anion X(-) in (X NO(3), Cl,...
An unprecedented hexanuclear heterotrimetallic Fe/Cu/Co complex bearing two Cu(mu-O)2Co(mu-O)2Fe cores is easily prepared by self-assembly and acts as a remarkable catalyst for the peroxidative oxidation of cycloalkanes under mild conditions.
The new three-dimensional (3D) heterometallic Cu(II)/Fe(II) coordination polymers [Cu(6)(H(2)tea)(6)Fe(CN)(6)](n)(NO(3))(2n)·6nH(2)O (1) and [Cu(6)(Hmdea)(6)Fe(CN)(6)](n)(NO(3))(2n)·7nH(2)O (2) have been easily generated by aqueous-medium self-assembly reactions of copper(II) nitrate with triethanolamine or N-methyldiethanolamine (H(3)tea H(2)mdea, respectively), in the presence potassium ferricyanide sodium hydroxide. They isolated as air-stable crystalline solids fully characterized...
Reactions of copper(II) with 3-phenylhydrazopentane-2,4-diones X-2-C6H4–NHNC{C(O)CH3}2 bearing a substituent in the ortho-position [X = OH (H2L1) 1, AsO3H2 (H3L2) 2, Cl (HL3) 3, SO3H (H2L4) 4, COOCH3 (HL5) 5, COOH (H2L6) 6, NO2 (HL7) 7 or H (HL8) 8] lead to variety complexes including monomeric [CuL4(H2O)2]·H2O 10, [CuL4(H2O)2] 11 and [Cu(HL4)2(H2O)4] 12, dimeric [Cu2(H2O)2(μ-HL2)2] 9 polymeric [Cu(μ-L6)]n] 13 ones, often two fused six-membered metallacycles. Complexes 10–12 can...
A facile, efficient and selective solvent-free synthesis of ketones from secondary alcohols with tert-butylhydroperoxide (TBHP) as the oxidant under microwave irradiation is achieved, where copper(II) 2,4-alkoxy-1,3,5-triazapentadienato complexes are catalysts providing high yields (up to 100%), TONs 890) TOFs 1780 h−1).
The zinc(II) complexes with ortho-hydroxy substituted arylhydrazo-β-diketonates [Zn2(CH3OH)2(μ-L1)2] (5), [Zn{(CH3)2SO}(H2O)(L2)] (6), [Zn2(H2O)2(μ-L3)2] (7) and [Zn(H2O)2(L4)]·H2O (8) were synthesized by reaction of a salt the appropriate hydrazo-β-diketone, HO-2-C6H4-NHNC{C(O)CH3}2 (H2L1, 1), HO-2-O2N-4-C6H3-NHNC{C(O)CH3}2 (H2L2, 2), HO-2-C6H4-NHNCC(O)CH2C(CH3)2CH2C(O) (H2L3, 3) or HO-2-O2N-4-C6H3-NHNCC(O)CH2C(CH3)2CH2C(O) (H2L4, 4). They fully characterized, namely X-ray diffraction...
Abstract A new water‐soluble β‐diketone azo derivative ― 3‐(5‐chloro‐2‐hydroxy‐3‐sulfophenylhydrazo)pentane‐2,4‐dione(H 3 L, 1 ) was synthesized and found to be stable in DMSO solution the solid state hydrazo tautomeric form. Its complexes [Co(HL)(en)(H 2 O)] · 4H O ( zwitterionic [Cu(L)(Hen)(H 4 ), with buffering properties, were prepared by reaction of cobalt(II) copper(II) nitrates ethylenediammonium (H en) salt , en)(HL) ). In formation is a chelating ligand, crucial synthetic structural...