N&el 温度接近 140 K。随着 Ti-Ti 距离的减小,体磁性质从顺磁性突然变为反铁磁性,Ni 与载体的相互作用发生了变化;Ni/Ti7013 化学吸附的 H2 几乎是 Ni/Ti6OI1 的两倍。这是一个有趣的例子,说明体电子特性如何影响表面化学。总之,我们已经表明,在 295 K 时,H2 在分散在 Ti,02,1 上的 Ni 上的化学吸附随着 n 的减小而减小。此外,H2 化学吸附的变化不是 n 的平滑函数,但在 Ti7013 和 Ti6OI1 之间观察到大的下降,其中体积特性发生了很大的变化。这些发现与 Ni 与 TiO 反应形成亚稳态 Ni Ti 4 复合材料的模型一致。
Multimeric protected fluorescent reagents and their methods of synthesis are provided. The reagents are useful in various fluorescence-based analytical methods, including the analysis of highly multiplexed optical reactions in large numbers at high densities, such as single molecule real time nucleic acid sequencing reactions. The reagents contain fluorescent dye elements, that allow the compounds to be detected with high sensitivity at desirable wavelengths, binding elements, that allow the compounds to be recognized specifically by target biomolecules, and protective shield elements, that decrease undesirable contacts between the fluorescent dye elements and the bound target biomolecules and that therefore decrease photodamage of the bound target biomolecules by the fluorescent dye elements. The reagents also contain coupling elements connect monomeric compounds into multimeric forms, thereby increasing brightness.