Bis(1,10-phenanthroline-5,6-dione-κN,N')silver(I) tetra-fluoridoborate.

In the structure of the title compound, [Ag(C(12)H(6)N(2)O(2))(2)]BF(4) or [AgL(2)]BF(4) (L = phendione), the Ag and B atoms are located on twofold rotation axes. The dihedral angle between the two phendione ligands is 36.7 (2)°.

5,6-Di-oxo-1,10-phenanthrolin-1-ium trifluoro-methane-sulfonate.

In the structure of the title salt, C(12)H(7)N(2)O(2) (+)·CF(3)SO(3) (-), the cation participates in hydrogen bonding with the dione group of an adjacent cation as well as with the trifluoro-methane-sulfonate anion. In addition, there is an extensive network of C-H⋯O inter-actions between the cations and anions. There are two formula units per asymmetric unit.

Acetato(1,10-phenanthroline-5,6-dione)silver(I) trihydrate.

In the structure of the title compound, [Ag(C(2)H(3)O(2))(C(12)H(6)N(2)O(2))]·3H(2)O, the Ag(I) atom is coordinated by both 1,10-phenanthroline-5,6-dione N atoms and one O atom from the acetate anion. The three water mol-ecules are involved in extensive hydrogen bonding to each other and to the acetate O and 1,10-phenanthroline-5,6-dione O atoms. In addition, there are weak C-H⋯O inter-actions.

Vibrational assignment of the Raman active modes of 1,10-phenanthroline-5,6-dione using DFT calculations.

A complete assignment of the Raman active modes of 1,10-phenanthroline-5,6-dione in the 100-4000 cm(-1) spectral region is reported. Intense well resolved spectra of solid phendione with high S/N are reported. Assignment of the normal modes with appropriate symmetry representation symbols was achieved by employing density functional theory calculations.

Detection of benzopyrene-deoxyguanosine adducts by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.

A method for the detection of BPDE-d guanosine adducts using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) is described and illustrated. The results indicate that MALDI is capable of detecting two other DNA benzopyrene adducts, which are trace products formed during the synthesis of BPDE-d guanosine. This MALDI-TOFMS method offers the potential for the detection of DNA adducts in human tissue using very limited sample purification and preparation.