0000000001302179
AUTHOR
Júlia Mayans
showing 39 related works from this author
Nickel(II) Coordination Clusters Based on N-salicylidene-4-chloro-oaminophenol: Synthetic and Structural Studies
2018
Field-induced slow magnetic relaxation and magnetocaloric effects in an oxalato-bridged gadolinium(iii)-based 2D MOF
2021
The coexistence of field-induced slow magnetic relaxation and moderately large magnetocaloric efficiency in the supra-Kelvin temperature region occurs in the 2D compound [GdIII2(ox)3(H2O)6]n·4nH2O (1), a feature that can be exploited in the proof-of-concept design of a new class of slow-relaxing magnetic materials for cryogenic magnetic refrigeration.
Family of Isomeric CuII–LnIII (Ln = Gd, Tb, and Dy) Complexes Presenting Field-Induced Slow Relaxation of Magnetization Only for the Members Containi…
2020
The strategic design and synthesis of two isomeric CuII complexes, [CuLA] and [CuLB], of asymmetrically dicondensed N2O3-donor Schiff-base ligands (where H2LA and H2LB are N-salicylidene-N'-3-methoxysalicylidenepropane-1,2-diamine and N-3-methoxysalicylidene-N'-salicylidenepropane-1,2-diamine, respectively) have been accomplished via a convenient CuII template method. These two complexes have been used as metalloligands for the synthesis of three pairs of Cu-Ln isomeric complexes [CuL(μ-NO3)Ln(NO3)2(H2O)]·CH3CN (for complexes 1A-3A, L = LA, and for complexes 1B-3B, L = LB and Ln = Gd, Tb, and Dy, respectively), all of which have been characterized structurally. In all six isomorphous and is…
Modulation of Nuclearity in Cu II −Mn II Complexes of a N 2 O 2 Donor Ligand Depending upon Carboxylate Anions: Structures, Magnetic Properties and C…
2020
Three new hetero-metallic copper(II)-manganese(II) complexes, [(CuL)2 Mn3 (C6 H5 CO2 )6 ] (1), [(CuL)2 Mn(CH3 CO2 )2 ] (2), and {[(CuL)2 Mn(C6 H5 CH2 CO2 )2 ] ⋅ 2CH3 CN} (3), have been synthesized using [CuL] as ''metalloligand'' (where H2 L=N,N'-bis(2-hydroxynaphthyl-methylidene)-1,3-propanediamine). Single-crystal structural analyses show an almost linear penta-nuclear structure for complex 1 where a square planar [CuL] unit is connected to each of the two terminal MnII ions of a linear, centrosymmetric [Mn3 (benzoate)6 ] unit through the double phenoxido bridges. Both complexes 2 and 3 possess a linear tri-nuclear structure where two terminal square-pyramidal [CuL] units are bonded to th…
ZnII and CuII-Based Coordination Polymers and Metal Organic Frameworks by the of Use of 2-Pyridyl Oximes and 1,3,5-Benzenetricarboxylic Acid
2021
The simultaneous use of 2-pyridyl oximes (pyridine-2 amidoxime, H2pyaox
From 1D coordination polymers to Metal Organic Frameworks by the use of 2-pyridyl oximes.
2020
The synthesis and characterization of coordination polymers and metal&ndash
Expanding the NUIG MOF family: synthesis and characterization of new MOFs for selective CO2 adsorption, metal ion removal from aqueous systems, and d…
2021
Metal organic frameworks (MOFs) have attracted considerable attention in recent years due to their use in a wide range of environmental, industrial and biomedical applications. The employment of benzophenone-4,4'-dicarboxylic acid (bphdcH2) in MOF chemistry provided access to the 3D mixed metal MOFs [CoNa2(bphdc)2(DMF)2]n (NUIG2) and [ZnK2(bphdc)2(DMF)2]n (NUIG3), and the 2D homometallic MOF [Co2(OH)(bphdcH)2(DMF)2(H2O)2]n(OH)·DMF (1·DMF). 1·DMF is based on a dinuclear SBU and consists of interpenetrating networks with an sql topology. Dc magnetic susceptibility studies were carried out in 1·DMF and revealed the presence of weak antiferomagnetic exchange interactions between the metal centr…
Further synthetic investigation of the general lanthanoid(iii) [Ln(iii)]/copper(ii)/pyridine-2,6-dimethanol/carboxylate reaction system: {CuII5LnIII4…
2021
In addition to previously studied {CuII3Gd6}, {CuII8Gd4}, {CuII15Ln7} and {CuII4Ln8} coordination clusters (Ln = trivalent lanthanide) containing pdm2− or Hpdm− ligands (H2pdm = pyridine-2,6-dimethanol) and ancillary carboxylate groups (RCO2−), the present work reports the synthesis and study of three new members of a fifth family of such complexes. Compounds [Cu5Ln4O2(OMe)4(NO3)4(O2CCH2But)2(pdm)4(MeOH)2] (Ln = Dy, 1; Ln = Tb, 2; Ln = Ho, 3) were prepared from the reaction of Ln(NO3)3·xH2O (x = 5, 6), CuX2·yH2O (X = ClO4, Cl, NO3; y = 6, 2 and 3, respectively), H2pdm, ButCH2CO2H and Et3N (2 : 2.5 : 2 : 1 : 9) in MeCN/MeOH. Rather surprisingly, the copper(II)/yttrium(III) analogue has a sli…
Structural and magnetic studies of mononuclear lanthanide complexes derived from Ν-rich chiral Schiff bases.
2021
Zn(II) complexes containing N, N,N and N,N,N pyridine (dPy) ligands tend to display improved fluorescence efficiencies in comparison with their starting ligands benefiting from the chelation enhanced effect (CHEF) and preventing photoinduced electron transfer (PET) mechanisms by the coordination of their lone pair electrons. Nevertheless, the size of Zn(II) makes steric crowding an important factor to be considered, since it can promote the elongation of the coordination bonds that weakens their strength and favors the reduction of fluorescence efficiencies through PET processes. For that reason, in this contribution we have performed a systematic study of Zn(II) compounds based on α-acetam…
A biocompatible ZnNa2-based metal–organic framework with high ibuprofen, nitric oxide and metal uptake capacity
2020
Metal organic frameworks (MOFs) have received significant attention in recent years in the areas of biomedical and environmental applications. Among them, mixed metal MOFs, although promising, are relatively few in number in comparison with their homometallic analogues. The employment of benzophenone-4,4′-dicarboxylic acid (bphdcH2) in mixed metal MOF chemistry provided access to a 3D MOF, [Na2Zn(bphdc)2(DMF)2]n (NUIG1). NUIG1 displays a new topology and is a rare example of a mixed metal MOF based on 1D rod secondary building units. UV-vis, HPLC, TGA, XRPD, solid state NMR and computational studies indicated that NUIG1 exhibits an exceptionally high Ibuprofen (Ibu) and nitric oxide adsorpt…
From Bowls to Capsules: Assembly of Hexanuclear Ni II Rings Tailored by Alkali Cations
2020
An anionic hexanuclear NiII metallamacrocycle with endo and exo linking sites has been employed as a building block to generate a series of capsules and bowls of nanometric size. The supramolecular arrangement of the {Ni6 } rings was tailored by the size of the alkali cations, showing the transition from {Ni6 -M2 -Ni6 } capsules (M=LiI and NaI ) to {Ni6 -M} bowls (M=KI and CsI ). The alkyl co-cations are determinant to stabilize the assemblies by means of CH⋅⋅⋅π interactions on the exo side of the metallamacrocycles. The effect on the topology of the supramolecular assemblies of the cation size, cation charge, Et3 NH+ or Me4 N+ counter cations has been analyzed. Magnetic measurements reveal…
Synthesis and characterization of new coordination compounds by the use of 2-pyridinemethanol and di- or tricarboxylic acids
2021
The development of synthetic approaches towards new coordination polymers has attracted significant interest due to their fascinating physical properties, as well as their use in a wide range of technological, environmental and biomedical applications. Herein, the initial combination of 2-pyridinemethanol (Hhmp) with 1,4-benzenedicarboxylic acid (H2bdc) or 1,3,5-benzenetricarboxylic acid (H3btc) has been proven a fruitful source of such new species providing access to five new coordination compounds, namely [M2(Hbtc)2(Hhmp)4]·DMF (M = CoII, 1·DMF;NiII, 2·DMF), [Ni(bdc)(Hhmp)2]n·4H2O (3·4H2O), [Zn2(bdc)(hmp)2]n·DMF (4·DMF) and [Fe3(bdc)3(Hhmp)2]n (5). 4·DMF and 5 are the first metal–organic …
Chiral Oxazolidine Complexes Derived from Phenolic Schiff Bases
2020
Schiff bases derived from pyridyl- or salicyl-aldehydes and aminoalcohols can evolve to heterocyclic oxazolidines, which in the presence of cations allow the formation of uncommon coordination compounds. In this work, we report new NiII and mixed valence MnII/ MnIV complexes derived from pyridyl oxazolidines and the unprecedented characterization of enantiomerically pure oxazolidines derived from the condensation of o-vanillin with phenylglycinol in the presence of NiII cations. The different reactivity of the pyridinic or phenolic Schiff bases has been compared, and the new systems have been structurally, optically, and magnetically characterized.
Correlating the axial Zero Field Splitting with the slow magnetic relaxation in GdIII SIMs
2021
The field-induced out-of-phase magnetic response of a GdIII complex, selected by its good isolation in the network, has been analyzed and the behaviour of this quasi-isotropic cation has been related to its weak axial zero field splitting ∼0.1 cm-1.
Exploring the Role of Intramolecular Interactions in the Suppression of Quantum Tunneling of the Magnetization in a 3d-4f Single-Molecule Magnet.
2021
Hydroxide-bridged FeIII4LnIII2 clusters having the general formula [Fe4Ln2(μ3-OH)2(mdea)6(SCN)2(NO3)2(H2O)2]·4H2O·2MeCN {Ln = Y (1), Dy (2), mdea = N-methyldiethanolamine} were synthesized and magnetically characterized. The thermal relaxation of the magnetization for 2 and the diluted FeIII4DyIIIYIII complex 3 (with and without applied field) has been analyzed. The diluted sample shows a dominant QTM at low temperatures that can be removed with a 0.15 T dc field. Both 2 and 3 show moderately high Ueff barriers and exhibit hysteresis loops until 5 K.
Cover Feature: From Bowls to Capsules: Assembly of Hexanuclear Ni II Rings Tailored by Alkali Cations (Chem. Eur. J. 49/2020)
2020
Holmium(III) Single-Ion Magnet for Cryomagnetic Refrigeration Based on an MRI Contrast Agent Derivative
2021
The coexistence of field-induced blockage of the magnetization and significant magnetocaloric effects in the low-temperature region occurs in a mononuclear holmium(III) diethylenetriamine-N,N,N′,N″,N″-pentaacetate complex, whose gadolinium(III) analogue is a commercial MRI contrast agent. Both properties make it a suitable candidate for cryogenic magnetic refrigeration, thus enlarging the variety of applications of this simple class of multifunctional molecular nanomagnets.
CCDC 2073645: Experimental Crystal Structure Determination
2021
Related Article: Ioannis Mylonas-Margaritis, Júlia Mayans, Wenming Tong, Pau Farràs, Albert Escuer, Patrick McArdle, Constantina Papatriantafyllopoulou|2021|CrystEngComm|23|5489|doi:10.1039/D1CE00659B
CCDC 1996425: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Constantinos C. Stoumpos, Mercé Font-Bardia, Albert Escuer|2020|Chem.-Eur.J.|26|11158|doi:10.1002/chem.202001900
CCDC 2061983: Experimental Crystal Structure Determination
2021
Related Article: Meghan Winterlich, Darragh McHugh, Evan O'Toole, Katerina Skordi, Ciaran O'Malley, Rana Sanii, Anastasios Tasiopoulos, Andrea Erxleben, Júlia Mayans, Liam Morrison, Patrick McArdle, Michael J. Zaworotko, Emmanuel Tylianakis, George Froudakis, Constantina Papatriantafyllopoulou|2021|Dalton Trans.|50|6997|doi:10.1039/D1DT00940K
CCDC 1942681: Experimental Crystal Structure Determination
2019
Related Article: Júlia Mayans, Mercé Font-Bardia, Albert Escuer|2019|Dalton Trans.|48|16158|doi:10.1039/C9DT03600H
CCDC 1996430: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Constantinos C. Stoumpos, Mercé Font-Bardia, Albert Escuer|2020|Chem.-Eur.J.|26|11158|doi:10.1002/chem.202001900
CCDC 1996426: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Constantinos C. Stoumpos, Mercé Font-Bardia, Albert Escuer|2020|Chem.-Eur.J.|26|11158|doi:10.1002/chem.202001900
CCDC 2008125: Experimental Crystal Structure Determination
2020
Related Article: Sayantan Ganguly, Júlia Mayans, Ashutosh Ghosh|2020|Chem.Asian J.|15|4055|doi:10.1002/asia.202000706
CCDC 2073643: Experimental Crystal Structure Determination
2021
Related Article: Ioannis Mylonas-Margaritis, Júlia Mayans, Wenming Tong, Pau Farràs, Albert Escuer, Patrick McArdle, Constantina Papatriantafyllopoulou|2021|CrystEngComm|23|5489|doi:10.1039/D1CE00659B
CCDC 1996428: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Constantinos C. Stoumpos, Mercé Font-Bardia, Albert Escuer|2020|Chem.-Eur.J.|26|11158|doi:10.1002/chem.202001900
CCDC 2073642: Experimental Crystal Structure Determination
2021
Related Article: Ioannis Mylonas-Margaritis, Júlia Mayans, Wenming Tong, Pau Farràs, Albert Escuer, Patrick McArdle, Constantina Papatriantafyllopoulou|2021|CrystEngComm|23|5489|doi:10.1039/D1CE00659B
CCDC 1993846: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Daniel Gómez, Mercè Font-Bardia, Albert Escuer|2020|Cryst.Growth Des.|20|4176|doi:10.1021/acs.cgd.0c00466
CCDC 2008123: Experimental Crystal Structure Determination
2020
Related Article: Sayantan Ganguly, Júlia Mayans, Ashutosh Ghosh|2020|Chem.Asian J.|15|4055|doi:10.1002/asia.202000706
CCDC 1993844: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Daniel Gómez, Mercè Font-Bardia, Albert Escuer|2020|Cryst.Growth Des.|20|4176|doi:10.1021/acs.cgd.0c00466
CCDC 1993843: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Daniel Gómez, Mercè Font-Bardia, Albert Escuer|2020|Cryst.Growth Des.|20|4176|doi:10.1021/acs.cgd.0c00466
CCDC 1996427: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Constantinos C. Stoumpos, Mercé Font-Bardia, Albert Escuer|2020|Chem.-Eur.J.|26|11158|doi:10.1002/chem.202001900
CCDC 2073646: Experimental Crystal Structure Determination
2021
Related Article: Ioannis Mylonas-Margaritis, Júlia Mayans, Wenming Tong, Pau Farràs, Albert Escuer, Patrick McArdle, Constantina Papatriantafyllopoulou|2021|CrystEngComm|23|5489|doi:10.1039/D1CE00659B
CCDC 1996429: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Constantinos C. Stoumpos, Mercé Font-Bardia, Albert Escuer|2020|Chem.-Eur.J.|26|11158|doi:10.1002/chem.202001900
CCDC 2073644: Experimental Crystal Structure Determination
2021
Related Article: Ioannis Mylonas-Margaritis, Júlia Mayans, Wenming Tong, Pau Farràs, Albert Escuer, Patrick McArdle, Constantina Papatriantafyllopoulou|2021|CrystEngComm|23|5489|doi:10.1039/D1CE00659B
CCDC 2008124: Experimental Crystal Structure Determination
2020
Related Article: Sayantan Ganguly, Júlia Mayans, Ashutosh Ghosh|2020|Chem.Asian J.|15|4055|doi:10.1002/asia.202000706
CCDC 2047766: Experimental Crystal Structure Determination
2021
Related Article: Marta Orts-Arroyo, Renato Rabelo, Ainoa Carrasco-Berlanga, Nicolás Moliner, Joan Cano, Miguel Julve, Francesc Lloret, Giovanni De Munno, Rafael Ruiz-García, Júlia Mayans, José Martínez-Lillo, Isabel Castro|2021|Dalton Trans.|50|3801|doi:10.1039/D1DT00462J
CCDC 1993845: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Daniel Gómez, Mercè Font-Bardia, Albert Escuer|2020|Cryst.Growth Des.|20|4176|doi:10.1021/acs.cgd.0c00466
CCDC 1993842: Experimental Crystal Structure Determination
2020
Related Article: Júlia Mayans, Daniel Gómez, Mercè Font-Bardia, Albert Escuer|2020|Cryst.Growth Des.|20|4176|doi:10.1021/acs.cgd.0c00466