A new approach to formulating pyrotechnic materials is presented whereby constituent ingredients are bound together in a solid-state lattice. This reduces the batch inconsistencies arising from the traditional approach of combining powders by ensuring the key ingredients are 'mixed' in appropriate quantities and are in intimate contact. Further benefits of these types of material are increased safety levels as well as simpler logistics, storage and manufacture. A systematic series of new frameworks comprising fuel and oxidiser agents (group 1 and 2 metal nodes & terephthalic acid derivatives as linkers) has been synthesised and structurally characterised. These new materials have been assessed for pyrotechnic effect by calorimetry and burn tests. Results indicate that these materials exhibit the desired pyrotechnic material properties and the effect can be correlated to the dimensionality of the structure. A new approach to formulating pyrotechnic materials is proposed whereby constituent ingredients are bound together in a solid-state lattice. A series of Metalorganic framework frameworks comprising fuel and oxidiser agents exhibits the desired properties of a pyrotechnic material and this effect is correlated to the dimensionality of the structure.Pyrotechnics are ubiquitous in modern life, with usage ranging across airbags, flares, matches, oxygen candles and display. However the approach to their manufacture has barely changed over the centuries that we have been using them. Research into pyrotechnic materials is further motivated by a need to improve safety and flexibility of manufacture, logistics, storage and performance consistency. They are categorised alongside propellants and explosives as "Energetic Materials" and at the simplest level, a pyrotechnic material consists of two primary constituents -an oxidiser, commonly metal nitrates or perchlorates and a reducing agent or fuel which can be comprised of non-metals e.g. C or S, metals e.g. Mg or Al and carbohydrates e.g. lactose.1 Further ingredients are binders, propellants and agents producing effects such as colour, sound or smoke.2 A pyrotechnic device is therefore a mixture of functional materials in the solid state, in contrast to explosives which are typically single molecules that undergo rapid decomposition. For pyrotechnics to produce the desired effect ingredients must be intimately mixed, but industry still follows simplistic manufacturing approaches. Ingredients are either dry mixed or wet mixed where the former tumbles powders together or sieves,3,4 whilst wet mixing blends a slurry with horizontal and vertical mixers and various blades. These methods do not ensure the homogeneous composition

Slow diffusion reaction of 2,2Ј-dithiodibenzoic acid (dtdb) with CuCl 2 in the presence of N-donor ligands results in the formation of different coordination polymers where both S-S and C-S scission and oxidation of S is observed. X-ray diffraction analysis of [Cu(tdb)(phen)(H 2 O)] 2 ·2H 2 O.2DMF] (1), [Cu(tdb)(py) 2 (H 2 O)] 2 (3), and [Cu(tdb)(bipy)(H 2 O)] 2 ·0.5H 2 O (4) (tdb = thiodibenzoic acid, phen = phenanthroline, py = pyridine, bipy = 2,2Ј-bipyridine) show * Dr. M. G. Bhowon E-Mail: mbhowon@uom.ac.mu [a]

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Promoted by RuCl 3 .3H 2 O coordination in the mixed solvent DMF/H 2 O, diverse in situ S-S bond reactions such as S-S bond scission and S-oxidation occurred in the disulfide ligand of 2,2'-dithiodibenzoic acid acid (dtdb) to yield the new sulfinato-benzoate ligand (sb). The X-ray analysis of complexes of [Ru(phen) 2 (sb)] (1) and [Ru(bipy) 2 (sb).H 2 O] (2) revealed that in both complexes, the ruthenium ion was found to be in an octahedral geometry, coordinating to the sulfur atom, rather than the oxygen of sulfinate. The complexes were found to be active against the bacterial strains tested with MIC ranging from 14.3-261 µM. In addition, the metal complexes present strong DNA binding affinities constants in the major or minor grooves at the order of magnitude 10 3 -10 5 M −1 . The antioxidant activities of the ligand and its metal complexes were investigated through scavenging effects for DPPH in vitro, indicating that the compounds show stronger antioxidant activities than some standard antioxidants, such as ascorbic and vitamin C.Keywords: 2,2'-dithiodibenzoic acid, S-oxidation, ruthenium, bacterial strains, DNA binding, antioxidantIn situ metal/disulfide reactions under slow diffusion conditions undergo S-S mediated bond reactions, such as S-oxidation, S-S and C-S bond scission. This is a very important research field in coordination chemistry as it leads to structurally novel coordination architectures with interesting physical properties [1][2][3]. In this respect, the use of organosulfur compounds containing carboxylate groups can be attractive due to their flexibility and versatile coordinating modes of both sulfur and oxygen atoms and, generating unprecedented coordination frameworkswhich can act as linkers between inorganic moieties [4][5][6][7][8]. Up to now, a series of transition metal complexes have been found to react with 2,2'-dithiodibenzoic acid (dtdb), giving rise to 1D chains, 2D sheets or 3D network whereby the carboxylate act as monodentate or bidentate donor with or without cleavage of the S-S bond [9]. Recently, we have isolated new copper(II) coordination polymers, whereby dtdb underwent simultaneous S-S and C-S scission under slow diffusion conditions, leading to the formation of 1D coordination polymers [10]. In the presence of 1,10 phenanthroline (phen) and 2,2'bipyridine (bipy), in addition to extrusion of the sulfur atom, the oxidation of sulfur to a sulfate ion was observed. These observations, coupled with the fact that there are no reports of ruthenium complexes derived from dtdb, stimulated our interest to investigate its coordination behavior. Hence, in this work we report for the first time new coordination polymers obtained from RuCl 3 .3H 2 O and dtdb in the presence of phen and bipy, which exhibit sulfinato-benzoate units. The fluorescent, antioxidant and antibacterial properties of the complexes have also been studied, since ruthenium complexes is considered as an attractive alternative to platinum in anticancer drug design and biological applications [11][12][13]...