NH Derived Sulfonic Acids: Hydrazine Disulfonate, [(SO)HNNH(SO)], and Hydrazine Iso-disulfonate, [HNN(SO)].

The reaction of hydrazinium sulfate and chlorosulfonic acid in pyridine leads to the pyridinium salt of the hydrazine disulfonate anion, [(SO)HNNH(SO)]. The salt is the starting material for the preparation of further hydrazine disulfonates, for example of alkaline metals and barium. In all compounds, the [(SO)HNNH(SO)] anion adopts the gauche conformation.

The Divalent Lanthanoid Triflates Ln(CFSO)(CHCN) (Ln=Sm, Eu): Structure, Luminescence, and Magnetism.

The reaction of the trivalent lanthanoide triflates Ln(OTf) (Ln=Sm, Eu; OTf=CFSO ) with the respective metals in acetonitrile leads to the Ln(II)-triflates Eu(OTf)(CHCN) (monoclinic, P2/n, Z=4, a=1053.54(1), b=610.28(5), c=1946.

Triflate's bigger brother: The unprecedented tribrate anion, [Br CSO ].

The synthesis of the unprecedented [Br CSO ] anion starts with the bromination of phenylmethanesulfonate, C H OSO CH , with KOBr leading to C H OSO CBr . The formation of the [CBr ] moiety has been proved, also by an X-ray structure determination of the compound (triclinic, P-1, a=685.9(2), b=698.

Trichlates, an Unattended Class of Compounds: Characterization of Cl CSO Cl, and (H O )[Cl CSO ].

Chlorination of CS leads to trichloromethanesulfenyl chloride, Cl CSCl, in moderate yields. The oxidation of Cl CSCl with H O gives Cl CSO Cl, the chloride of trichloromethanesulfonic acid. Cl CSO Cl is the crucial product for the preparation of trichloromethanesulfonates ("trichlates") and has been characterized by IR spectroscopy, differential scanning calorimetry (DSC) and X-ray diffraction measurements (P-1, a=609.

The Cyanido-Sulfate Anion [SO CN].

The reaction of the pyridine adduct of SO and tetra-n-butyl-ammonium cyanide, [N( Bu) ][CN] at room temperature leads to the unprecedented cyanido-sulfate anion [SO CN] stabilized in the salt [N( Bu) ][SO CN]. The anion is a pseudo-halogen congener of the well-known fluoro- and chloro-sulfates. The new anion has been studied by vibrational spectroscopy and theoretical calculations.

Impact of 1,10-Phenanthroline-Induced Intermediate Valence on the Luminesence of Divalent Europium Halides.

Starting from EuX (X = Cl, Br, I), we systematically investigated a variety of divalent europium complexes containing bidentate 1,10-phenanthroline (Phen) ligands. Depending on the Eu/Phen ratio, mono-, di-, and polynuclear complexes are formed, with the latter yielding one-dimensional [EuBr(phen)] chains. Seven new divalent europium complexes, [Eu(phen)(HO)]Br·2MeCN, [Eu(phen)]I·1.

Multivalent stimulation of β-, but not β-receptors by adrenaline functionalised gold nanoparticles.

In this study, we present a strategy for the synthesis of catecholamine functionalised gold nanoparticles and investigated their multivalent interactions with adrenergic receptors in different biological systems. The catecholamines adrenaline and noradrenaline represent key examples of adrenergic agonists. We used gold nanoparticles as carriers and functionalised them on their surface with a variety of these neurotransmitter molecules.

The Unprecedented [S N O ] Anion in the Molecular Gold Complexes [Au Br (S N O ) ] and [Au Cl (S N O ) ](S O Cl ).

The reaction of hexachlorophosphazene, P N Cl , with SO and the gold halides AuCl and AuBr , respectively, leads to the new cyclic anionic tetramer, [S N O ] , which is coordinated to Au in the dimeric complexes [Au X (S N O ) ] (X=Cl, Br). The [S N O ] anion can be seen as the condensation product of two sulfate anions, [SO ] and two amidosulfate anions, [NH SO ] .

High-Yield Tc Labeling of Gold Nanoparticles Carrying Atropine and Adrenaline.

This work focuses on the synthesis, purification, and analytical characterization of novel multifunctional Au NPs radiolabeled with Tc. These mixed-ligand shell Au NPs represent pharmacologically relevant samples for potential application in theragnostics. A ligand using a plain linker with a rather long chain consisting of 10 CH groups and a thiol moiety along with the PADA chelator has been used for both the attachment to the Au NP surface and for the Tc(CO) complexation.

Stabilizing the Homopolycation (I ) with a Hexasulfate in (I )[S O ] and a Borosulfate in (I )[B(S O ) ].

The reaction of elemental iodine and SO in a sealed glass ampoule yielded a turquoise-colored solution. At temperatures below 7 °C, deep red crystals of (I )[S O ] grow. With the addition of B O and pyridine-SO complex red crystals of (I )[B(S O ) ] can be obtained after heating the mixture to 120 °C.

Selenous Acid in an Aromatic Framework: Insights Into a Temperature-Sensitive Internal Redox System from the Solid State.

We report on a new compound composed of a phenanthroline network in which emerging channels are alternately occupied by selenous acid (HSeO) and dioxane molecules. The material undergoes a variety of structural changes due to both its redox activity as well as its thermal decomposition. We investigate an internal redox system of the incorporated selenous acid and the aldehyde groups of the phenanthroline framework.

Heterobimetallic uranyl(VI) alkoxides of lanthanoids: formation through simple ligand exchange.

Lanthanoid and actinoid silylamides are versatile starting materials. Herein we show how a simple ligand exchange with -butanol leads to the formation of the first trimeric heterobimetallic uranyl(VI)-lanthanoid(III) alkoxide complexes. The coordination of the endogenous uranyl oxo atom results in a significant elongation of the bond length and a significant deviation from the linear uranyl arrangement.

Ammonium Pertechnetate in Mixtures of Trifluoromethanesulfonic Acid and Trifluoromethanesulfonic Anhydride.

Ammonium pertechnetate reacts in mixtures of trifluoromethanesulfonic anhydride and trifluoromethanesulfonic acid under final formation of ammonium pentakis(trifluoromethanesulfonato)oxidotechnetate(V), (NH ) [TcO(OTf) ]. The reaction proceeds only at exact concentrations and under the exclusion of air and moisture via pertechnetyl trifluoromethanesulfonate, [TcO (OTf)], and intermediate Tc species. Tc nuclear magnetic resonance (NMR) has been used to study the Tc compound and electron paramagnetic resonance (EPR), Tc NMR and X-ray absorption near-edge structure (XANES) experiments indicate the presence of the reduced technetium species.

The tin sulfates Sn(SO) and Sn2(SO4)3: crystal structures, optical and thermal properties.

We report the crystal structures of two tin(IV) sulfate polymorphs Sn(SO4)2-I (2/ (no. 14), = 504.34(3), = 1065.

S N O -A Nitrogen-Poor Sulfur Nitride Oxide, and the Anhydride of Nitrido-tris-Sulfuric Acid.

The reaction of hexachlorophosphazene, P N Cl , with SO leads to the new sulfur nitride oxide S N O . The compound displays an extraordinarily low nitrogen content and exhibits a bicyclic cage structure according to the formulation N{S(O) O(O) S} N, with both nitrogen atoms in trigonal planar coordination of sulfur atoms. Interestingly, the new nitride oxide can be also seen as the anhydride of nitrido-tris-sulfuric acid, N(SO H) .

A Tunable Trifluoromethyliodonium Reagent.

Four complexes of MCl (M=Ti, Zr, Hf) with the hypervalent trifluoromethyl iodine reagent trifluoromethyl-1,3-dihydro-3,3-dimethyl-1,2-benziodoxole (1,=L) are described. With TiCl , an I-O bond cleavage occurs, leading to the formation of the trifluoromethyliodonium alcoholate complexes [Ti Cl (L) ]Cl (2 a) and Ti Cl (L) (2 b). Reactions with ZrCl and HfCl form the complexes ZrCl (L) (3) and HfCl (L) (4), respectively, wherein the original I-O bond is retained and elongated compared to that in free 1.

Nanostructured Composites of BiSb Nanoparticles and Carbon Nanotubes and the Characterization of Their Thermoelectric Properties.

The impact of inclusions of carbon nanotubes (CNT) on the thermoelectric properties of nanostructured BiSb alloys with an Sb content between 10 and 20% was investigated for varying amounts of CNT. Three series of BiSb pellets with 0, 0.3, and 0.

Polysulfates [S O ] : With the [S O ] Anion, has the End been Reached?

The S O ion was obtained both as rubidium and ammonium salt from the reaction of the respective sulfate with SO . It is the largest polysulfate ion known to date and exhibits a chain of six vertex-connected [SO ] tetrahedra. The unique compound was comprehensively characterized and the bonding within the anion was elucidated by theoretical investigations.

Stabilizing Superacid Anions: The New [H(S O ) ] Anion in the Crystal Structure of Li [H(S O ) ].

The unique hydrogenium-bis-tetrasulfate anion [H(S O ) ] in the crystal structure of Li [H(S O ) ] (monoclinic, P2 /n (No. 14), Z=2, a=552.46(4) pm, b=939.

Towards Polysulfuric Acids: The Hydrogentrisulfate Anion [HS O ] in A[HS O ] (A=Na, K, Rb).

The reaction of Na SO and K SO with fuming sulfuric acid (65 % SO ) yielded colorless extremely sensitive crystals of Na[HS O ] (monoclinic; P2 /n (No. 14); Z=4; a=707.36(2), b=1378.

Palladium(IV) in an Oxoanionic Environment: The XeF2 Assisted Synthesis of [Pd(S2 O7 )3 ](2.).

For the first time tetravalent palladium is detected, coordinated exclusively by simple oxoanions. Stabilization was achieved by formation of the [Pd(S2 O7 )3 ](2-) complex in which three chelating disulfate groups surround the metal atom. The salt K2 [Pd(S2 O7 )3 ] could only be obtained if the reaction of K2 [PdCl6 ] and neat SO3 was performed in the presence of XeF2 .

Effects of multivalent histamine supported on gold nanoparticles: activation of histamine receptors by derivatized histamine at subnanomolar concentrations.

Colloidal gold nanoparticles with a functionalized ligand shell were synthesized and used as new histamine receptor agonists. Mercaptoundecanoic acid moieties were attached to the surface of the nanoparticles and derivatized with native histamine. The multivalent presentation of the immobilized ligands carried by the gold nanoparticles resulted in extremely low activation concentrations for histamine receptors on rat colonic epithelium.

A Highly Triflated Rare-Earth Ion in [Eu(O3SCF3)8](5-).

The reaction of Eu2O3 with fuming nitric acid, trifluormethanesulfonic acid, and its anhydride in torch-sealed glass ampoules at 120 °C gave the europium compound (NO)5[Eu(O3SCF3)8] (orthorhombic, Fddd, Z = 16, a = 1932.69(4), b = 2878.44(7), c = 2955.