An enantiopure, conductive, and paramagnetic crystalline 3-D metal-organic framework (MOF), based on Dy(III) the l-tartrate chiral ligand, is proved to behave as an almost ideal electron spin filtering material at room temperature, transmitting one component only, leading a polarization (SP) power close 100% in ±2 V range, which conserved over long spatial larger than 1 μm some cases. This impressive capacity of this class nanostructured materials measured by means magnetically polarized...

Metal–organic frameworks (MOFs) are an interesting class of porous crystalline solids assembled from organic ligands and metal clusters (or simply cations), which have shown a rich variety promising applications. In recent years, these materials become one the most actively studied areas in field new development. One aspects MOFs is their optical properties porosity, may be smartly coupled with aim creating multifunctional materials. This work gives overview significant achievements on this...

Several synthetic approaches have been employed to obtain novel {[ScM(μ4-pmdc)2(H2O)2]·solv}n [EHU1(Sc,M)] (where M = Li, Na; pmdc pyrimidine-4,6-dicarboxylate; solv corresponding solvent) compounds. The synthesis method is crucial determine the type of alkaline that could be hosted in structure as well crystallinity, adsorption performance, and ionic conductivity resulting materials. Compared with other methods, a heat-assisted solvent-free procedure has proven most effective route, giving...

Herein, we describe and study a new family of isostructural multifunctional metal-organic frameworks (MOFs) with the formula {[Ln5L6(OH)3(DMF)3]·5H2O}n (where (H2L) is 3-amino-4-hydroxybenzoic acid ligand) for magnetism photoluminescence. Interestingly, three materials (Dy-, Er-, Yb-based MOFs) present single-molecule magnet (SMM) behavior derived from magnetic anisotropy lanthanide ions as consequence adequate electronic distribution coordination environment. Additionally, photoluminescence...

Detailed structural, magnetic, and luminescence studies of six different crystalline phases obtained in the lanthanide/pyrimidine-4,6-dicarboxylate/oxalate system have been afforded: {[Ln(μ-pmdc)(μ-ox)(0.5)(H(2)O)(2)]·3H(2)O}(n) (1-Ln), {[Ln(μ-pmdc)(μ-ox)(0.5)(H(2)O)(3)]·2H(2)O}(n) (2-Ln), {[Ln(μ(3)-pmdc)(μ-ox)(0.5)(H(2)O)(2)]·~2.33H(2)O}(n) (3-Ln), {[Ln(2)(μ(3)-pmdc)(μ(4)-pmdc)(μ-ox)(H(2)O)(3)]·5H(2)O}(n) (4-Ln), {[Ln(μ(3)-pmdc)(μ-ox)(0.5)(H(2)O)(2)]·H(2)O}(n) (5-Ln),...

Detailed structural, magnetic, and photoluminescence characterization of a family new compounds based on 5-cyanoisophthalate (CNip) ligand several transition metal or lanthanide ions, namely, [Cu3(μ3-CNip)2(μ-H2O)2(μ3-OH)2]n (1), {[Co3(μ4-CNip)3(DMF)4]·∼2DMF}n (2), [Cd(μ4-CNip) (DMF)]n (3), {[Ln2(μ4-CNip)(μ3-CNip)2(DMF)4]·∼DMF·H2O}n (4-Ln) (with LnIII = Tb, Dy, Er), {[Gd6(μ3-CNip)5(μ4-CNip)3(μ-form)2(H2O) (DMF)10]·∼3DMF·3H2O}n (5), {[Zn32(μ4-CNip)12(μ-CNip)12(μ4-O)8(H2O)24]·∼12DMF}n (6)...

Luminescent coordination polymers (CPs) are known for their unique abilities to provide tunable emission processes originated at the interplay between infinite inorganic and organic constituents combined in endless ways, thus yielding smart molecule‐scaled materials be processed as photodevices, sensors, optical storage systems or even logic gates. Nonetheless, most of these applications demand occurrence persistent luminescence prevent background interference with fluorescence signal. This...

Here, the synthesis by a soft solvothermal route of two novel isoreticular compounds based on in situ generated (by nucleophilic aromatic substitution) 2-hydroxi-5-(trifluoromethyl)pyrimidine (H1L) ligand and Zn(II) Cd(II) as metallic centers (with general formula [ML2]n labeled GR-MOF-30 for M = Zn GR-MOF-31 Cd) is reported, together with their detailed structural photoluminescent characterization. These metal–organic frameworks are first examples coordination constructed this ligand....

A series of isostructural copper(II) coordination polymers containing the nucleobase adenine and different monocarboxylic acids as bridging ligands, [Cu(2)(μ(3)-ade)(2)(μ(2)-OOC(CH(2))(n)CH(3))(2)]·xH(2)O (n from 0 to 5), have been prepared. Single-crystal X-ray analysis acetate = 0) butanoate 2) compounds shows a covalent three-dimensional network in which centers are bridged by μ-N3,N7,N9-adeninato μ-O,O'-carboxylato with crystallization water molecules trapped pores, decorated...

Coordination polymers containing paddle-wheel shaped building units of general formula [Cu2(μ-adeninato)2(μ-carboxylato)2] (1–3) and [Cu2(μ-carboxylato)4(methyladenine)2] (4–6) are reported. The copper(II) centers the compounds {[Cu2(μ3-adeninato)2(μ-Hglut)2]·2H2O}n (1), {[Cu2(μ3-adeninato)2(μ-Hadip)2]}n (2), {[Cu2(μ3-adeninato)2(μ-Hpime)2]}n (3) (where glut: glutarato; adip: adipato; pime: pimelato) bridged by tridentate N3,N7,N9-adeninato ligands to give a similar covalent...

Control over the synthetic conditions in many metal/diazinedicarboxylato systems is crucial to prevent oxalate formation, since dicarboxylato ligands easily undergo degradation presence of metal salts. We report here an efficient route obtain oxalato-free compounds for lanthanide/pyrimidine-4,6-dicarboxylato (pmdc) system on basis reaction temperature and nonacidic pH or oxygen free atmosphere. Two different crystal architectures have been obtained: {[Ln(μ-pmdc)1.5(H2O)3]·xH2O}n (1-Ln)...

Detailed structural characterization and photoluminescence properties of four new metal–organic frameworks (MOFs) based on zinc(II) or cadmium(II) metal ions, di- tricarboxylic aromatic ligands, bipyridyl-like elongated ancillary linkers, namely, {[Zn2(μ4-bdc)2(μ-pbptz)]·2DMF·3H2O}n (1), {[Cd(μ3-bdc)(μ-pbptz)]·3DMF}n (2), {[Cd3(μ5-btc)2(μ-pbptz)]·2DMF}n (3), {[Zn2(μ-dhbdc)2(μ-pbptz)(DMF)4]·2DMF·H2O}n (4) (where bdc = benzene-1,4-dicarboxylato, btc benzene-1,3,5-tricarboxylato, dhbdc...

A new Zn(ii) based coordination polymer (CP) built by the cohesive pilling of 2D Shubnikov type layers is reported. This material exhibits time dependent multicoloured emission, part which shows a persistent green phosphorescence visible for up to two seconds naked eye, originates from multiple charge transfer mechanisms.

This work reports on the preparation and optical characterization of two metal–organic frameworks (MOFs) based strontium ions 2-amino-1,4-benzenedicarboxylate (NH2-bdc) ligand: i.e., [Sr(NH2-bdc)(DMF)]n (1) {[Sr(NH2-bdc)(Form)]·H2O}n (2) (where DMF = dimethylformamide Form formamide). Compound 1 has a 3D architecture built up from linkage established by NH2-bdc among metal–carboxylate rods, leaving significant microchannels that are largely occupied molecules coordinated to centers. The...

The reaction between CuCl2 and adenine in a non-aqueous solvent provides 3D porous structure based on paddle-wheel [Cu2(µ-adenine)4Cl2]2+ cations Cl− anions that are held together by robust supramolecular hydrogen bonding network. desolvated compound is able to host different guest molecules within the ∼6 Å diameter 1D channels.

Solvent-free reaction between lanthanide nitrates and pyrimidine-4,6-dicarboxylic acid led to 3D frameworks with coordinated showing a photoluminescence improvement waveguiding behaviour.

We have synthesized a novel three-dimensional metal-organic-framework (MOF) based on the perylene-3,4,9,10-tetracarboxylate linker and potassium as metallic centre. report formation of this K-based MOF using conventional routes with water solvent. This material displays intense green photoluminescence at room temperature, an aggregation dependent quenching. Correlation optical properties crystalline packing was confirmed by DFT calculations. also demonstrate its potential to build humidity...

We have synthesized a novel family of metal–organic chains based on 4-nitro-1H-pyrazole linker and zinc as metal center. report the formation these coordination polymers using hydrothermal routes with water solvent. These materials display one-dimensional structures major structural modifications from minimal synthetic variations. What is more interesting, we carried out antitumor measurements, related properties networks. To best our knowledge, constitute first examples polymeric for...

An exhaustive study of the factors governing hydro- and solvothermal reaction ScCl3 with pyrimidine-4,6-dicarboxylic acid (H2pmdc) has led to five Sc(III)-organic architectures, namely {[Sc(μ-pmdc)(μ-ox)0.5(H2O)2]·3H2O}n (1), {[Sc(μ-pmdc)(μ-OH)(H2O)]·H2O}n (2), {(NH4)[Sc(μ-ox)2]·2H2O}n (3), {(tma)2[ScK(μ-form)6]}n (4), [Sc2(pmdc)(OH)3Cl]·DMF·2H2O (5) (where ox = oxalate, tma tetramethylammonium, form formate, DMF dimethylformamide). In this system, pmdc anion proven be particularly sensitive...

Twelve novel dinuclear ZnII–LnIII complexes of general formula [Zn(μ-L)(μ-OAc)Ln(NO3)2] (LnIII = Y (1), Pr (2), Nd (3), Sm (4), Eu (5), Gd (6), Tb (7), Dy (8), Ho (9), Er (10), Tm (11), Yb (12)) have been prepared from the symmetric compartmental Mannich base ligand N,N′-dimethyl-N,N′-bis(2-hydroxy-3-methoxy-5-methylbenzyl)-ethylenediamine (H2L). Structural determinations indicate that in all these complexes, ZnII ions are pentacoordinated inner position ligand, linked to two nitrogen and...

We report herein the synthesis and structural chemical characterization of six new compounds consisting 6-aminonicotinate (6ani) ligands first-row transition metal ions, namely, [Mn2(μ-6ani)2(H2O)8](6ani)2 (1), [Co(6ani)(bipy)2(H2O)3](6ani)·5H2O (2), [M(μ-6ani)(6ani)(H2O)3]·2H2O [MII = Co (3), Ni (4)], [M(μ-6ani)2]·H2O (5), Cu (6)] (where bipy 4,4′-bipyridine). Compounds 1 2 consist isolated dimeric monomeric entities held together by supramolecular interactions governed 6ani free anions....

Three MOFs based on alkaline-earth metals and aromatic carboxylate linkers show blue fluorescence that turns into green long-lasting phosphorescence.

Four new compounds based on zinc(II) or cadmium(II) metal ions and elongated dicarboxylate bipyridine ligands, namely, {[Cd3(μ4-bpdc)3(H2O)2]·DMF}n (1), {[Zn3(μ4-bpdc)3(μ-bpdb)]·5DMF}n (2), {[Zn2(μ4-bpdc)2(μ-bpdb)]·7DMF}n (3), {[Zn4(μ4-bpdc)3(DMF)(μ4-O)(H2O)]·7DMF·3H2O}n (4), (where bpdc = biphenyl-4,4′-dicarboxylate, bpdb 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene, DMF dimethylformamide) have been synthesised under solvothermal conditions structurally characterised by single crystal X-ray...