Metallocryptands-Inorganic Host Complexes

位于里诺的内华达州大学的Vincent Catalano在无机、生物无机和有机化学项目的支持下，研究了一类新的含金属笼状络合物的设计、合成和表征。这些复合物被称为氢氪。在合成大量膦基配体之后，将研究各种d10金属物质（如Ag（I）和Au（I））和阴离子与这些配体的结合。将对由此产生的复合物进行光谱学和光化学研究，以阐明重要的新效应（包括金属-金属键合的特殊特征）。该研究小组先前由NSF资助的工作已经证明，以金属离子为组分的分子结构可以封装其他金属物质，并且进一步地，这种复合物形成的模式可以产生在其他情况下不可观察的现象。例如，当金的阳离子（金离子）作为客体结合到含金属的主体分子中时，由于金-金相互作用而产生强烈的发光。在这种情况下，包封配体保护金二聚体免受破坏。在本阶段的工作中，将跟踪有希望的线索，并寻找新的现象。

Vincent Catalano of the University of Nevada at Reno is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program in research on design, synthesis and characterization of a new class of metal-containing cage complexes. These complexes are called metallocryptates. Synthesis of a large number of phosphine-based ligands will be followed by study of the binding of various d10 metal species (such as Ag(I) and Au(I)), and of anions, with those ligands. Spectroscopic and photochemical studies will be carried out on the complexes thus produced, in order to clarify important new effects (including special features of metal-metal bonding) made possible by this mode of complex formation.Previous NSF-funded work by this research group has demonstrated that molecular structures that have metal ions as components can serve to encapsulate yet other metallic species, and further that this mode of complex formation can generate phenomena that are not otherwise observable. For example, when cations of gold (aurous ions) are incorporated as guests into metal-containing host molecules, intense luminescence due to gold-gold interactions develops. In this case, the encapsulating ligand protects the gold dimer from disruption. In the current phase of the work, promising leads will be followed up, and new phenomena sought.