A5025074831- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Magnetism in coordination complexes
- Polyoxometalates: Synthesis and Applications
- Lanthanide and Transition Metal Complexes
- Crystallography and molecular interactions
- Metal complexes synthesis and properties
- Chemical Synthesis and Characterization
- Crystal structures of chemical compounds
- Porphyrin and Phthalocyanine Chemistry
- Synthesis of Organic Compounds
- Crystal Structures and Properties
- Organometallic Complex Synthesis and Catalysis
- Covalent Organic Framework Applications
- Metal-Catalyzed Oxygenation Mechanisms
- Zeolite Catalysis and Synthesis
- Synthesis and biological activity
- Multicomponent Synthesis of Heterocycles
- Molecular Sensors and Ion Detection
- Luminescence Properties of Advanced Materials
- Vanadium and Halogenation Chemistry
- Radioactive element chemistry and processing
- Chemical Synthesis and Reactions
- Oxidative Organic Chemistry Reactions
University of Aveiro
2016-2025
Universidade Federal de Sergipe
2022
Nankai University
2018
Chengdu University
2018
National Taiwan Normal University
2018
Purdue University West Lafayette
2018
Centre de Recherche sur l'Information Scientifique et Technique
2018
University of Abou Bekr Belkaïd
2016
Complejo Hospitalario Universitario de Santiago
2015
Universidade Estadual Paulista (Unesp)
2015
Microwave heating, used in organic chemistry for several decades, has only recently been applied to the preparation of multi-dimensional coordination polymers, more commonly known as metal–organic frameworks (MOFs). heating allows short reaction times, fast kinetics crystal nucleation and growth, high yields desirable products which can be isolated with few or no secondary products. The most significant developments use microwave MOFs are briefly reviewed from this perspective, emphasizing...
Isostructural lanthanide organic frameworks (Me 2 NH ) 3 [Ln (FDC) 4 (NO ]·4H O (Ln = Eu ( 1 ), Gd Tb H FDC 9‐fluorenone‐2,7‐dicarboxylic acid), synthesized under solvothermal conditions, feature a Ln‐O‐C rod‐packing 3D framework. Time‐resolved luminescence studies show that in the energy difference between triplet excited state (17794 cm −1 and 5 D 0 3+ level (17241 is small enough to allow strong thermally activated ion‐to‐ligand back transfer. Whereas emission of ligand essentially...
A new heterodinuclear [Zn(L)Dy]3+ complex, with L being a compartmental Schiff base ligand, exhibits the characteristic Dy3+ luminescence associated single-ion field induced slow relaxation of magnetisation. This complex may be considered as one rare examples bifunctional luminescent magnet.
The hydrothermal synthesis of the novel Na[LnSiO4] (Ln = Gd, Eu, Tb) disordered orthorhombic system is reported. At 100 K, and above, these materials are best described in centrosymmetric Pnma space group. lower temperatures (structure solved at 30 K) unit cell changes to body-centered with Imma symmetry. exhibit unique photophysical properties, arising from both, this phase transformation, disorder Ln(3+) ions, located a site D2d point Na[(Gd0.8Eu0.1Tb0.1)SiO4] an unprecedented case...
Isostructural modular microporous Na2[Y(hedp)(H2O)0.67] and Na4[Ln2(hedp)2(H2O)2].nH2O (Ln = La, Ce, Nd, Eu, Gd, Tb, Er) framework-type, layered orthorhombic [Eu(H2hedp)(H2O)2].H2O Na0.9[Nd0.9Ge0.10(Hhedp)(H2O)2], monoclinic [Ln(H2hedp)(H2O)].3H2O Y, Tb), triclinic [Yb(H2hedp)].H2O coordination polymers based on etidronic acid (H5hedp) have been prepared by hydrothermal synthesis characterized structurally (among others) single-crystal powder X-ray diffraction solid-state NMR. The structure...
An efficient and recyclable oxidative desulfurization process (ODS) to remove the most refractory sulfur-compounds (dibenzothiophene, 1-benzothiophene 4,6-dimethyldibenzothiophene) from fuel is reported. The ODS was catalyzed by terbium-polyoxometalate [Tb(PW11O39)2]11− (Tb(PW11)2) its composite Tb(PW11)2@MIL-101. tetrabutylammonium (TBA) salt of Tb(PW11)2 prepared further incorporated in porous metal–organic framework MIL-101(Cr). TBA compound were characterized various techniques (powder...
A new family of cyano-bridged coordination polymers Ln(H2O)5[M(CN)8] (Ln = Eu, Tb, Sm, Gd; M Mo, W) were obtained and characterized by X-ray diffraction, photoluminescence spectroscopy, magnetic analyses. These compounds are isomorphous crystallize in the tetragonal system P4/nmm, forming two-dimensional gridlike networks. The Eu- Tb-containing room-temperature optically active emitters displaying characteristic 5D0 → 7F0-4 (Eu3+) 5D4 7F6−2 (Tb3+) transitions. All except Eu(H2O)5[M(CN)8]...
We present an experimental NMR, X-ray diffraction (XRD), and computational study of the supramolecular assemblies two crystalline forms Ciprofloxacin: one anhydrate hydrate forming water wormholes. The resonance assignment up to 51 54 distinct (13)C (1)H resonances for is reported. effect crystal packing, identified by XRD, on chemical shifts including weak interionic H-bonds, quantified; shift changes ∼-3.5 ppm CH···π contacts ∼+2 (CH···O((-))); ∼+4.7 (((+))NH···O((-))) H-bonds. Water...
The hydrothermal reaction between Cd(NO(3))(2), trimesic acid (H(3)BTC), 1,2-bis(4-pyridyl)ethane (BPE), and triethylamine under mild conditions yielded, after 3 days, a novel three-dimensional metal-organic framework, [Cd(1.5)(BTC)(BPE)(H(2)O)(2)].(H(2)O), which has been characterized structurally using single-crystal powder X-ray diffraction, elemental analysis, infrared Raman spectroscopies, thermogravimetry, differential scanning calorimetry. structure exhibits 2-fold interpenetration of...
Three novel cadmium-organic frameworks built-up from 1,3,5-benzenetricarboxylate anions (HXBTC(x-3)) and 4,4'-trimethylenedipyridine (TMD) have been hydrothermally synthesized, characterized using single-crystal X-ray diffraction, thermoanalytical measurements, elemental analysis, IR Raman spectroscopies: [Cd(HBTC)(TMD)(2)].8.5H(2)O (I), [Cd(HBTC)(TMD)(H(2)O)].4.5H(2)O (II), [Cd(2)(BTC)(TMD)(2)(NO(3))].3H(2)O (III), with structures I II being isolated as a mixture of crystals. Structure...
A new cyano-bridged coordination polymer network Tb(H2O)5-[Mo(CN)8] was obtained and characterized. This compound has a two-dimensional layered structure presents luminescence along with magnetic transition at low temperature.
New europium and gadolinium tris-beta-diketonate complexes have been prepared incorporated in sol-gel-derived organic-inorganic hybrids, named di-ureasils. The general formula [Ln(btfa)3(4,4'-bpy)(EtOH)] (Ln=Eu, Gd; 4,4'-bpy=4,4'-bipyridine; btfa=4,4,4-trifluoro-1-phenyl-1,3-butanedione) for the was confirmed by X-ray crystallography elemental analysis. ground-state geometry of Eu3+ complex calculated from Sparkle/AM1 model. quantum yield obtained Sparkle model crystal structure (both 46%)...
Novel three-dimensional lanthanide−organic frameworks with 2,5-pyridinedicarboxylic (2,5-H2pdc) and 1,4-phenylenediacetic acids (1,4-H2pda) were synthesized by hydrothermal synthesis, characterized structurally using single-crystal powder X-ray diffraction, elemental thermogravimetric analyses, FT-IR photoluminescence spectroscopies, diffuse reflectance. The structural details of [Ln2(2,5-pdc)2(1,4-pda)(H2O)2] [where Ln3+ = Eu3+, Tb3+, (Eu0.2Tb0.8)3+ (Eu0.1Tb0.9)3+] the dehydrated...