Synthesis, Characterization and Quantum Mechanical Calculations of [Au
<sub>18</sub>
Se
<sub>8</sub>
(dppthph)
<sub>6</sub>
]Cl
<sub>2</sub>
作者:Paloma Sevillano、Olaf Fuhr、Oliver Hampe、Sergej Lebedkin、Christian Neiss、Reinhart Ahlrichs、Dieter Fenske、Manfred M. Kappes
DOI:10.1002/ejic.200700870
日期:2007.11
The reaction of [Au(tht)Cl] (tht = tetrahydrothiophene) with 2,5-bis(diphenylphophanyl)thiophene (dppthph) and Se(SiMe3)2 leads to the formation of [Au18Se8(dppthph)6]Cl2. This compound crystallizes in two modifications, both containing a cluster dication with nearly identical gold–selenium cores. The dication consists of two subunits only connected by six aurophilic interactions. ESI MS demonstrates
[Au(tht)Cl](tht = 四氢噻吩)与 2,5-双(二苯基膦基)噻吩(dppthph)和 Se(SiMe3)2 的反应导致形成 [Au18Se8(dppthph)6]Cl2。该化合物以两种变体结晶,均包含具有几乎相同的金-硒核的簇状标记。指示由两个亚基组成,仅通过六个嗜热相互作用连接。ESI MS 表明,即使在气态下,这些也能促进簇亚基的凝聚。SCS-MP2 计算表明,二聚体是一种可转移物质,最终通过库仑势垒阻止其解离。此外,光致发光测量表明,簇分子配体壳的微小差异导致两种修饰的不同光致发光特性。(© Wiley-VCH Verlag GmbH & Co. KGaA,