作者:Ilya S. Krytchankou、Dmitry V. Krupenya、Antti J. Karttunen、Sergey P. Tunik、Tapani A. Pakkanen、Pi-Tai Chou、Igor O. Koshevoy
DOI:10.1039/c3dt52658e
日期:——
The reactions of gold acetylides (AuC2R)n with triphosphine ligands PPh2-(CH2)n-PPh-(CH2)2-PPh2 (n = 1, dpmp; 2, dpep) in the presence of M+ ions (M = Cu, Ag) lead to an assembly of the heterometallic clusters, the composition of which is determined by the steric bulkiness of the alkynyl groups and the flexibility of the phosphine motifs. For R = Ph, an unprecedented hexanuclear complex [Au5Cu(C2R)4(dpmp)2]2+ (1) was isolated, while for the aliphatic alkynes (R = 1-cyclohexanolyl, 2-borneolyl, 2,6-dimethyl-4-heptanolyl) a family of compounds based on a tetrametallic framework was prepared, [Au3Cu(C2R)3(dpmp)]+ (2, R = 1-cyclohexanolyl), [Au3M(C2R)3(dpep)]2+2 (3, M = Cu, R = 1-cyclohexanolyl; 4, M = Cu, R = 2-borneolyl; 5, M = Ag, R = 2-borneolyl), and [Au3Ag(C2R)3(dpep)]+ (6, R = 2,6-dimethyl-4-heptanolyl). Clusters 1, 2, and 4â6 were studied by X-ray crystallography. The NMR spectroscopic investigations showed that 1 and 3â5 are stereochemically non-rigid in solution and reversibly undergo possible dissociation (3) or isomerization (4, 5) processes. All the title complexes exhibit room temperature luminescence in the solid state in the spectral region from 414 to 566 nm, showing a dependence of emission energy on the structure and composition of the metal core. Computational studies with density functional methods were carried out to rationalize the dynamic and photophysical behavior of these compounds.
在M+离子(M = Cu,Ag)存在下, 金乙炔化物(AuC2R)n 与三膦配体PPh2-(CH2)n-PPh-(CH2)2-PPh2 (n = 1,dpmp; 2,dpep)的反应导致了异核簇的组装,其组成由炔基团的空间位阻和膦配体的灵活性决定。对于 R = Ph,分离出了一种前所未有的六核配合物 [Au5Cu(C2R)4(dpmp)2]2+ (1),而对于脂肪炔(R = 1-环己anol基,2-冰片基,2,6-二甲基-4-庚醇基),合成了一类基于四金属骨架的化合物,[Au3Cu(C2R)3(dpmp)]+ (2,R = 1-环己醇基),[Au3M(C2R)3(dpep)]2+2 (3,M = Cu,R = 1-环己醇基; 4,M = Cu,R = 2-冰片基; 5,M = Ag,R = 2-冰片基),以及 [Au3Ag(C2R)3(dpep)]+ (6,R = 2,6-二甲基-4-庚醇基)。通过 X 射线晶体学研究了簇 1、2 和 4-6。NMR 光谱研究显示,1 和 3-5 在溶液中是非刚性的,并可逆地经历可能的离解(3)或异构化(4,5)过程。所有标题配合物在固体状态下均表现出室温发射光,波长范围为 414 至 566 nm,发射能量依赖于金属核的结构和组成。使用密度泛函方法进行了计算研究,以解释这些化合物的动态和光物理行为。