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Petroporphyrin compositional analysis of a heavy crude oil has been realized by isolation and subsequent ESI-FT-ICR mass spectrometric analysis of the porphyrin-containing fractions. Vanadium octaethyl (V=O(II)OEP) and nickel octaethyl (Ni(II)OEP) porphyrin standards were analyzed to determine favorable electrospray ionization conditions and provide insight as to the molecular species present (e.g., adducts, multimers). Standard V=O(II)OEP and Ni(II)OEP solutions revealed the presence of both monomer and dimer species with a greater relative abundance of monomers. In contrast, mass spectral analysis of a porphyrin fraction from Cerro Negro crude oil was dominated by dimeric species. MS 3 analysis identified a dioctylphthalate (DOP) contaminant, likely introduced during fractionation of the crude oil. DOP-porphyrin complexes and porphyrin-porphyrin dimers were then identified. Infrared multiphoton dissociation (IRMPD) of dimeric species produced the corresponding monomers with minimal fragmentation. The monomeric petroporphyrins were analyzed to reveal the metal (Ni(II) or V=O(II)), porphyrin type (e.g., etio vs. DPEP), and distribution of alkylation.Key words: petroporphyrin, porphyrin, petroleum, electrospray ionization, mass spectrometry, Fourier transform, ion cyclotron resonance, ICR, FT-ICR, FTMS.

\"After five years on the run, Court Gentry is back on the inside at the CIA. But his first mission makes him wish he had stayed on the outs when a pair of Chinese agents try to take him down in Hong Kong. Normally the Chinese prefer to stay eyes-only on foreign agents. So why are they on such high alert? Court's high stakes hunt for answers takes him across Southeast Asia and leads to his old friend Donald Fitzroy, who is being held hostage by the Chinese\"--Amazon.com.

\"The Gray Man deals in death with mathematical precision, but this time he may finally find himself on the wrong side of the equation ... Court Gentry's flight on a CIA transport plane is interrupted when a security team brings a hooded man aboard. The mysterious passenger is being transported to England where a joint CIA/MI6 team will interrogate him about a mole in Langley. When they land at an isolated airbase in the UK, they are attacked by a hostile force that kidnaps the prisoner. Gentry, the lone survivor, is ordered to track down the assassins and rescue the asset. In Virginia, an assault on a CIA safe house leaves dead and wounded agents littering a suburban neighborhood. The object of the attack is Court's former lover, Zoya Zakharova. She escapes, but with a team of killers on her trail. Now, two different agents on two different continents are battling blind against the impossible--but each may be holding the piece the other needs to fight their way out\"-- Provided by publisher.

Magnetic studies were conducted on the solid solutions: TlCo$\\sb2$S$\\sb{\\rm x}$Se$\\sb{\\rm 2-x}$ (0.0 $\\le$ x $\\le$ 2.0). These materials crystallize in the ThCr$\\sb2$Si$\\sb2$-type structure with the cobalt atoms forming sheets in the ab plane sandwiched between chalcogen layers. Resistivity measurements on sintered pellets demonstrate that all of the compositions are highly metallic. The magnetic phase diagram was determined by magnetic susceptibility measurements. The Se-rich phases (0.0 $\\le$ x $<$ 0.75) order antiferromagnetically, the S-rich phases (0.75 $<$ x $\\le$ 2.0) order ferromagnetically, and the intermediate composition (x = 0.75) shows competition between antiferromagnetic and ferromagnetic behavior. The change in magnetic ordering type as a function of x is discussed in terms of the RKKY model. The magnetic structures of TlCo$\\sb2$X$\\sb2$ (X=S,Se) were determined at room temperature and at 4 K by powder neutron diffraction methods. The magnetic structure of TlCo$\\sb2$S$\\sb2$, which orders ferromagnetically at 97 K, has been shown to consist of ferromagnetically-ordered cobalt atom layers which lie parallel to the ab plane with their magnetic moments aligned in this plane. Adjacent planes of cobalt atoms order ferromagnetically. The powder neutron diffraction data of TlCo$\\sb2$Se$\\sb2$ is consistent with a magnetic structure composed of ferromagnetically-ordered cobalt atom planes with their magnetic moments aligned in the ab plane as for TlCo$\\sb2$S$\\sb2$; but in this case, the adjacent cobalt atom planes order antiferromagnetically. These magnetic structures are consistent with earlier oriented-crystal magnetic susceptibility measurements. Magnetic studies were performed upon the linear chain antiferromagnets: Ba$\\sb2$MnX$\\sb3$ (X=S,Se,Te) and the solid solutions: Ba$\\sb2$MnS$\\sb{\\rm x}$Se$\\sb{\\rm 3-x}$ (0.0 $\\le$ x $\\le$ 3.0) and Ba$\\sb2$MnSe$\\sb{\\rm x}$Te$\\sb{\\rm 3-x}$ (0.0 $\\le$ x $\\le$ 3.0). The magnetic susceptibility data were analyzed in terms of the Bonner-Fisher model for a spin 5/2 Heisenberg ion. The magnitude of the coupling constants were found to be inversely proportional to the Mn-Mn separation in the phases. This is consistent with the superexchange mechanism being operative in these insulating phases. The effects of diamagnetic \"impurities\" upon the magnetic behavior was determined by studying the solid solutions: Ba$\\sb2$Mn$\\sb{\\rm 1-x}$M$\\sb{\\rm x}$S$\\sb3$ (M=Zn,Cd; x = 0.01, 0.10). Dramatic reductions in one dimensional magnetic ordering are observed even at these low levels of impurity-doping. The effects of paramagnetic ion substitutions was determined by study of the solid solutions: Ba$\\sb2$Mn$\\sb{\\rm 1-x}$M$\\sb{\\rm x}$Se$\\sb3$ (M=Fe; 0 $\\le$ x $\\le$ 1.0). The magnetic susceptibility data were analyzed in terms of the reduced-spin model of Emori. Study of the magnetic susceptibility behavior of the series Ba$\\sb2$MS$\\sb3$ (M=Mn, Fe, Co) demonstrate that the magnitude of the magnetic coupling constant in this series is inversely proportional to the metal-to-metal separation in these linear chain phases.