Synthesis, structure and luminescence properties of Cu(ii), Zn(ii) and Cd(ii) complexes with 4′-terphenylterpyridine
作者:Young Hoon Lee、Emi Kubota、Akira Fuyuhiro、Satoshi Kawata、Jack M. Harrowfield、Yang Kim、Shinya Hayami
DOI:10.1039/c2dt31245j
日期:——
The complexes [M(tptpy)2](ClO4)2 (M = Zn(II) (1), Cd(II) (2), and Cu(II) (3)); tptpy = 4â²-[1,1â²:4â²,1â²â²]terphenyl-4â²â²-yl-[2,2â²:6â²,2â²â²]terpyridine = 4â²-terphenylterpyridine) have been synthesized, structurally characterized by X-ray crystallography and subjected to preliminary luminescence studies. In the crystalline state, all the metal ions have an N6 coordination sphere of distorted octahedral geometry and the structures of the Zn(II) and Cd(II) complexes are isomorphous but differ from that of the Cu(II) complex, which also differs from the other two in that it is non-emissive. The structure determinations show that aromaticâaromatic interactions involving both the terpyridine heads and the terphenyl tails are important factors influencing the crystalline array. The emission spectra of the Zn(II) and Cd(II) complexes are very similar and show a considerable red-shift of the emission maximum compared to that of the free ligand.
复合物[M(tptpy)2](ClO4)2(M = Zn(II) (1), Cd(II) (2), 和 Cu(II) (3); tptpy = 4'-[1,1':4',1'']三苯基-4''-[2,2':6',2'']三吡啶 = 4'-三苯基三吡啶)已被合成,并通过X射线晶体学结构表征,并进行了初步的发光研究。在晶体状态下,所有金属离子都具有扭曲八面体几何结构的N6配位球,Zn(II)和Cd(II)复合物的结构是同构的,但与Cu(II)复合物的结构不同,后者与其他两个不同之处在于它是非发光的。结构测定表明,涉及三吡啶头和三苯基尾的芳香-芳香相互作用是影响晶体排列的重要因素。Zn(II)和Cd(II)复合物的发射光谱非常相似,并且与自由配体相比,发射最大值有明显的红移。