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Structural, spectroscopic and DFT theoretical studies of phosphorescent CuIP2S-containing cuprous complexes
Acta Crystallographica Section C ( IF 0.7 ) Pub Date : 2021-06-07 , DOI: 10.1107/s2053229621005696
Yu Liang 1 , Jian Teng Wang 2 , Li Song 3 , Ding Qiu Dai 1 , You Yu Wang 1 , Wen Xiang Chai 1
Affiliation  

Luminescent cuprous complexes are important coordination compounds due to their relative abundance, low cost and ability to display excellent luminescence. The structures of two CuIP2S-type cuprous complexes, namely, iodido(thiourea-κS)bis(triphenylphosphane-κP)copper(I), [CuI(CH4N2S)(C18H15P)2] or [CuI(TU)(TPP)2] (I), and (2,3-dihydrobenzimidazole-2-thione-κS)iodidobis(triphenylphosphane-κP)copper(I), [CuI(C7H6N2S)(C18H15P)2] or [CuI(DHBIT)(TPP)2] (II), are described. In these two structures, the complex molecules of both are constructed by one copper(I) centre, one iodide ion, two TPP ligands and one thione ligand (TU for I and DHBIT for II). The copper(I) centres of I and II are both located in a distorted CuIP2S tetrahedron and are coordinated by two P atoms from two TPP ligands, one S atom from the thione ligand and the I atom. The UV–Vis absorption and photoluminescence properties of these CuIP2S-type cuprous complexes have been studied using crystalline powder samples. Detailed time-dependent density functional theory (TD-DFT) calculations and wavefunction analysis reveal that the pale-blue–green phosphorescence emission should originate from intra-ligand (TPP for I and DHBIT for II) charge transfer, with a small component of the metal-to-ligand charge transfer 3(IL+ML)CT excited state.

中文翻译:

含磷光 CuIP2S 亚铜配合物的结构、光谱和 DFT 理论研究

发光亚铜配合物由于其相对丰度、成本低和能够显示出优异的发光性能而成为重要的配位化合物。两种CuIP 2 S型亚铜配合物的结构,即碘(硫脲-κ S )双(三苯基膦-κ P )铜(I)、[CuI(CH 4 N 2 S)(C 18 H 15 P) 2 ] 或 [CuI(TU)(TPP) 2 ] ( I ), 和 (2,3-dihydrobenzimidazole-2-thione-κ S )iodidobis(triphenylphosphane-κ P )copper(I), [CuI(C 7 H 6 N 2 S)(C 18 H15 P) 2 ]或[CuI(DHBIT)(TPP) 2 ]( II )。在这两种结构中,两者的复杂分子由一个铜(I)中心、一个碘离子、两个 TPP 配体和一个硫酮配体(TU 为I和 DHBIT 为II)构成。III的铜 (I) 中心均位于扭曲的 CuIP 2 S 四面体中,并由来自两个 TPP 配体的两个 P 原子、来自硫酮配体的一个 S 原子和 I 原子配位。这些 CuIP 2的 UV-Vis 吸收和光致发光特性已经使用结晶粉末样品研究了 S 型亚铜配合物。详细的时间相关密度泛函理论 (TD-DFT) 计算和波函数分析表明,淡蓝绿色磷光发射应该源自配体内(I 的TPP和II 的DHBIT )电荷转移,其中一小部分是金属到配体的电荷转移3 (IL+ML)CT 激发态。
更新日期:2021-07-04
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