Synthesis, structure, photoluminescent, optical and magnetic properties of a novel thulium p-hydroxybenzenesulfonate complex

A novel thulium p-hydroxybenzenesulfonate complex [Tm(C6H5O4S)2(H2O)6](C6H5O4S)·3H2O (1) was solvothermally synthesized and characterized by elemental analyses, photoluminescence, solid-state UV/vis diffuse reflectance, magnetic measurements and single-crystal X-ray diffraction. Complex 1 features an ionic structure with the thulium ion possessing a square antiprismatic geometry. Complex 1 crystallized in the monoclinic system with space group P21. Photoluminescent measurements with solid-state sample demonstrate that the anti-Stokes emission bands in the red/NIR spectral region 710 and 812 nm are observed from the Tm3+ 4f intrashell transitions from the 3F2,3 excited states to the 3H6 and 1G4 excited state to the 3H5 state, respectively. Solid-state UV/vis diffuse reflectance spectra of complex 1 show the existence of a wide optical band gap of 3.56 eV. Variable-temperature magnetic susceptibility and field dependence magnetization measurements are also studied and the magnetic susceptibility obeys the Curie-Weiss law (χ m =c/(T−θ)) with the value C being of 8.6 K and a negative Weiss constant θ being of −0.2 K.

Single molecule magnetic behaviour in lanthanide naphthalenesulfonate complexes

A family of mononuclear lanthanide complexes exhibiting slow magnetic relaxation is reported, providing the first examples of pure 4f sulfonate-based single molecule magnets.

Crystal Engineering with the New Linker Tolanedisulfonic Acid (H2 TDS): Helical Chains in Zn(TDS)(DMA)3 , Linear Chains in Zn(TDS)(NMP)3 , and Complex Anions in [HDMA]2 [Zn(TDS)2 (DMA)3 ](DMA)2

Reaction of 4,4'-tolanedisulfonic acid, H2 TDS, with zinc hydroxide in dimethylacetamide, DMA, under solvothermal conditions led to the coordination polymer Zn(TDS)(DMA)3 (I). In the crystal structure [trigonal, P32 21, Z=3, a=1175.0(1) pm, c=1949.5(1) pm, R1 ; wR2 (Io > 2σ(Io ))=0.0393; 0.0921] the disulfonate anions linked the Zn(2+) ions into helical chains according to ∞ (1) [Zn(DMA)3/1 (TDS)2/2 ] (I) causing the chirality of the compound. By using higher concentrations of H2 TDS in the starting mixture the compound [HDMA]2 [Zn(TDS)2 (DMA)3 ](DMA)2 (II) was formed. The structure [monoclinic, Cc, Z=4, a=1201.5(1) pm, b=1996.0(1) pm, c=2749.2(2) pm, β=101.897(2)°, R1 ; wR2 (Io > 2σ(Io ))=0.0699; 0.2017] displayed the complex anion [Zn(TDS)2 (DMA)3 ](2-) which was a perfect cut-off of the helical chain in I. Charge compensation was achieved by protonated DMA molecules. If N-methylpyrrolidone, NMP, was chosen as a solvent, the sulfonate Zn(TDS)(NMP)3 (III) [monoclinic, I2/a, Z=4, a=1575.7(1) pm, b=1077.3(1) pm, c=1870.0(1) pm, β=101.189(9)°, R1 ; wR2 (Io > 2σ(Io ))=0.0563; 0.1320] was obtained. Similarly to the findings for I, the formation of chains according to ∞ (1) [Zn(NMP)3/1 (TDS)2/2 ] was observed. However, due to the more bulky NMP molecules these chains were no longer helical but straight instead.

1,2,4,5-Benzenetetrasulfonic acid and 1,4-benzenedisulfonic acid as sulfo analogues of pyromellitic and terephthalic acids for building coordination polymers of manganese

New polysulfonic acids have been used for the preparation of manganese coordination polymers.

A series of silver(I) pyridone-sulfonates with 1-D "butterfly" chain, 2-D lamellar network and 3-D pillared layered frameworks: syntheses, structures and characterizations

A series of silver(I) pyridone-sulfonates, namely [Ag5(HL1)3(NO3)2(H2O)]n (1) [Ag2(HL1)2]n.2nH2O (2), [Ag2(HL1)(NO3)]n (3), and [Ag3(HL2)2(NO3)(H2O)]n (4) (HL1 = 4(1H)-pyridone-3-sulfonate monoanion, HL2 = 2(1H)-pyridone-5-sulfonate monoanion), have been synthesized and characterized by elemental analyses, IR, TG, PL and X-ray analyses. Complex 1, which exhibits a novel continuous silver polyhedral framework containing four kinds of coordination spheres, has been recently reported. Complex 2 presents the first one-dimensional (1-D) "butterfly" array composed of SO3-bridged columns of Ag(I) ions and symmetric pendant organic groups in silver(I) sulfonates, while complex 3 possesses a two-dimensional (2-D) layer structure in which the inorganic network substructure consists of helical chains of edge-sharing Ag1 distorted octahedra linked through dimers of edge-sharing Ag2 distorted anti-trigonal prisms by sharing two corners and two edges. Replacing H2L1 by H2L2 leads to the formation of complex 4, a three-dimensional (3-D) pillared layered framework, which is also extended by the rare mu4 nitrate anion. In complexes 1-4, all the inorganic parts can be considered as being built up from versatile polyhedra of silver(I) centers by sharing corners, edges or faces. The sulfonic group shows some novel coordination modes, which is first reported here. Solid-state fluorescence quenching and thermal stability are discussed for all of these complexes.