Tobel, H. R. v.; Wizinger, R., Gore, T. S., Joshi, B. S., Sunthankar, S. V., Tilak, B. D. Recent progress in the chemistry of natural and synthetic colouring matters and related fields, New York-London 1962, S. 495/506
of ten 5-formazanyl copper(II) complexes in toluene solutions have been observed at room temperature and at that of liquidnitrogen. The ESR(g⁄⁄ and A⁄⁄) and bonding(α2) parameters of the copper ion were greatly affected by substituting several groups at the ortho position of 1-phenyl ring of formazan. Based on these results, the complexes are classified into three groups: Group I, in which A⁄⁄\simeq0
已在室温和液氮下观察到十种 5-甲脒基铜 (II) 配合物在甲苯溶液中的电子自旋共振 (ESR) 光谱。通过在甲臜的1-苯环邻位上取代几个基团,铜离子的ESR(g⁄⁄和A⁄⁄)和键合(α2)参数受到很大影响。基于这些结果,复合物被分为三组:第一组,其中 A⁄⁄\simeq0.012–0.013 cm-1 和 α2\simeq0.5;第 II 组,其中 A⁄⁄\simeq0.017 cm-1 和 α2\simeq0.7,以及第 III 组,其中两个铜离子相互作用。很明显,它们与先前研究的三种含铜蛋白质很好地对应。
Non-toxic corrosion-protection pigments based on manganese
申请人:——
公开号:US20040011252A1
公开(公告)日:2004-01-22
Corrosion-inhibiting pigments based on manganese are described that contain a trivalent or tetravalent manganese/valence stabilizer complex. An inorganic or organic material is used to stabilize the trivalent or tetravalent manganese ion to form a compound that is sparingly soluble, exhibits low solubility, or is insoluble in water, depending upon the intended usage. Specific stabilizers are chosen to control the release rate of trivalent or tetravalent manganese during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Stabilizers may also modify the processing and handling characteristics of the formed powders. Manganese/valence stabilizer combinations are chosen based on the well-founded principles of manganese coordination chemistry. Many manganese-valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium or tetravalent lead systems. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
Non-toxic corrosion-protection pigments based on rare earth elements
申请人:——
公开号:US20040104377A1
公开(公告)日:2004-06-03
A corrosion-inhibiting pigment comprising a rare earth element and a valence stabilizer combinded to form a rare earth/valence stabilizer complex. The rare earth element is selected from cerium, terbium, praseodymium, or a combination thereof, and at least one rare earth element is in the tetravalent oxidation state. An inorganic or organic material is used to stabilize the tetravalent rare earth ion to form a compound that is sparingly soluble in water. Specific stabilizers are chosen to control the release rate of tetravalent cerium, terbium, or praseodymium during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Stabilizers may also modify the processing and handling characteristics of the formed powders. Many rare earth-valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium systems.