[Compositions, Sources and Health Risks of Polycyclic Aromatic Hydrocarbons (PAHs) in Surface Dusts from Driving-schools in a City of Henan Province, China].

The contamination of polycyclic aromatic hydrocarbons (PAHs) in surface dusts attracts great attentions due to their properties of threatening human health. Twenty-nine surface dust samples were collected from driving-schools in a city of Henan. Concentrations of 16 priority PAHs were analyzed by gas chromatography-mass spectrometry (GC-MS).

A three-dimensional framework in 2,2'-biimidazolium bis(2,2'-biimidazole-κ(2)N,N')bis(biphenyl-2,4'-dicarboxylato-κO)manganese(II) hexahydrate.

In the title salt, (C(6)H(8)N(4))[Mn(C(14)H(8)O(4))(2)(C(6)H(6)N(4))(2)]·6H(2)O, the Mn(II) atom lies on an inversion centre and is coordinated by four N atoms from two 2,2'-biimidazole (biim) ligands and two O atoms from two biphenyl-2,4'-dicarboxylate (bpdc) anions to give a slightly distorted octahedral coordination, while the cation lies about another inversion centre. Adjacent [Mn(bpdc)(2)(biim)(2)](2-) anions are linked via two pairs of N-H..

Bis(4,4'-methyl-enedianilinium) naphthalene-1,5-disulfonate dihydrate.

The asymmetric unit of the title salt, C(13)H(16)N(2) (2+)·C(10)H(6)O(6)S(2) (2-)·2H(2)O, consists of one dication located on a general position, half each of two centrosymmetric dianions, and two uncoordinated water mol-ecules in general positions. In the dication, the dihedral angle between the benzene rings is 74.67 (6)°.

Bis(benzimidazolium) naphthalene-1,5-disulfonate trihydrate.

The title compound, 2C(7)H(7)N(2) (+)·C(10)H(6)O(6)S(2) (2-)·3H(2)O, consists of two crystallographically independent benzimidazolium cations, two independent naphthalene-1,5-disulfonate dianions (both generated by inversion) and three water mol-ecules. These components construct an infinite three-dimensional framework in the crystal structure via O-H⋯O and N-H⋯O hydrogen bonds.

catena-Poly[[nickel(II)-μ-1,3-dimethyl-2,6-dioxo-7H-purinato-κN:N] hydroxide].

The title complex, {[Ni(C(7)H(7)N(4)O(2))]OH}(n), has been prepared through hydro-thermal synthesis. The asymmetric unit contains one [Ni(TH)](+) cation (TH is the theophylline anion) and one hydroxide anion. The Ni(2+) ion is coordinated by two N atoms from two neighboring theophylline anions.

Effects of multiple ion loading on redox and luminescence properties of ruthenium trisphenanthroline crown ether hybrids.

Homoleptic and heteroleptic ruthenium trisphenanthrolines were prepared with azacrown ethers attached to the 4,7-positions of the phenanthrolines to maximise the electronic communication between the ruthenium and the crown ethers as complexation sites. Redox and spectral data were processed to explain the non-steady trends in the absorption and emission spectra in the series. Addition of Ba2+ entailed large shifts in the redox potential (up to 370 mV) and in the emission spectra (up to 87 nm).