CXVII.—Polythiosulphonic acids of p-diamines

Organic Chromophores Based on a Fused Bis‐Thiazole Core and Their Application in Dye‐Sensitized Solar Cells

“…[18] Benzo [1,2-d:4,5-dЈ]bisthiazoles 2 feature another interesting fused heterocyclic system, in which π-conjugation is further extended by the presence of an additional aromatic ring ( Figure 1). Although the synthesis of these compounds was claimed in 1903, [19] subsequent studies proved the corresponding structural assignment to be incorrect and described alternative procedures with which to obtain the products with the correct regiochemistry. [20,21] In analogy with thiazolothiazoles, benzo [1,2-d:4,5-dЈ]bisthiazoles have also been extensively investigated for their applications in nonlinear optics [22] and organic (opto)electronics.…”

ESR of Copper in Biological Systems

“…Following the isolation of the rat liver apo-tryptophan oxygenase and restoration of its catalytic activity by exogenous ferriprotoporphyrin IX, the enzyme was established as a heme protein (Greengard and Feigelson, 1962).…”

Tuning the Energy of the NIR Absorption of Dinuclear Triphos-Cobalt-Complexes

“…Chemicals: The ligands were commercially avail able or prepared by published procedures: 1,2,4,5-tetramercaptobenzene C6H6S4 [13], 2,5-diamino-1,4-benzoquinone C6H6N2O2 [14], 2,5-diamino-3,6-dichloro-l,4-benzoquinone C6H4N2O2CI2 [15], 2,5-diamino-3,6-dibromo-1,4-benzoquinone C6H4N2 0 2 Br2 [15], 2,5-diamino-3,6-diiodo-l,4-benzoquinone C6H 4N2O 2I2 [15], 2.5-bis(methylamino)-1,4-benzoquinone C8H 10N2O 2 [16], 2,5-disulfido-/?-phenylenediamine C6H6N2S2 [17], 4.6-dimercaptoresorcine C6H6O2S2 [18], 1,1,1 -tris(diphenylphosphanomethyl)ethane, CH3C(CH2PPh2)3 [19]. 2,4, To a solution of the triphos ligand (624 mg, 1 mmol) in THF (15 ml) a solution of Co(BF4)2 • 6 H2O (341 mg, 1 mmol) in ethanol (15 ml) was added.…”