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An approach to decontamination of biological endospores is discussed. Specifically, the performance of an aqueous modified Fenton reagent is examined. A modified Fenton reagent formulation of cupric chloride, ascorbic acid, and sodium chloride is shown to be an effective sporicide under aerobic conditions. The traditional Fenton reaction involves the conversion of hydrogen peroxide to hydroxyl radical by aqueous ionic catalysts such as the transition metal ions. Our modified Fenton reaction involves the conversion of aqueous dissolved oxygen to hydrogen peroxide by an ionic catalyst (Cu 2؉ ) and then subsequent conversion to hydroxyl radicals. Results are given for the modified Fenton reagent deactivating spores of Bacillus globigii. A biocidal mechanism is proposed that is consistent with our experimental results and independently derived information found in the literature. This mechanism requires diffusion of relatively benign species into the interior of the spore, where dissolved O 2 is then converted through a series of reactions which ultimately produce hydroxyl radicals that perform the killing action.

Aggregates of reaction intermediates form during the early stages of aniline oxidative polymerization whenever the initial mole ratio of proton concentration to aniline monomer concentration is low ([H(+)](0)/[An](0)

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A novel cobalt(II)−organic framework, [Co 2 (OH)(3,4-PBC) 3 ] n (I), has been acquired by the reaction of CoO with an unsymmetrical pyridylbenzoate ligand, 3-pyrid-4-ylbenzoic acid (3,4-PBC). Singlecrystal X-ray diffraction studies reveal that it is comprised of [Co II 4 (µ 3 -OH) 2 ] clusters linked by the unsymmetrical ligand 3,4-PBC, forming a novel helical double-layered metal−organic architecture. A significant overall antiferromagnetic behavior has been observed for this compound.The construction of novel metal coordination polymers, based on the interactions between metal ions and organic ligands, has attracted widespread interests because of their potential applications and intriguing variety of architectures and topologies. 1-6 In particular, the helical coordination polymers are of particular interest, owing to the fundamental role of helicity in biology and their potential utilization in chiral separation, asymmetric catalysis, and nonlinear optic applications, and many helical metal-organic assemblies and chiral coordination polymers have been constructed on the basis of helical topology. [7][8][9] Lin et al. have explored the synthesis of novel optical and magnetic materials via the use of unsymmetrical pyridylcarboxylate and analogous bridging ligands. 10 The presence of different functional groups in these kinds of ligands may render interesting properties of the resulting coordination polymers, and the lack of a center of symmetry on these kinds of ligands makes it possible to produce helical polymers. Double-layered structure can be regarded as a unique molecular "floor" directly linked by pillars through covalent bonds, hydrogen bonds, or other weak interactions. The interesting ionic components are concentrated in the central portions of each layer, and the organic portions form hydrophilic layers that sandwich the ionic portions. The double-layered metal-organic frameworks have been reported to show the spongelike dynamic behavior of reducing the interlayer spacing dramatically in response to guest removal, and the charged bilayer compound Na-Adc has been designed as an interesting new biomaterial. 11 However, the occurrence of pillared-layer complexes with helical character is particularly rare, although the helical layer motif (a layer b) Tellini, V. H. S.; Jover, A.; Galantini, L.; Pavel, N. V.;Meijide, F.; Tato, J. V.