Trans-to-cis isomerization of a platinum(II) complex with two triphosphine ligands via coordination with gold(I) ions

IF 2.3 4区化学 Q2 Agricultural and Biological Sciences

Journal of Inclusion Phenomena and Macrocyclic Chemistry Pub Date : 2024-05-10 DOI:10.1007/s10847-024-01228-2

Kazuki Nagasato, Taichi Baba, Hayato Soma, Nobuto Yoshinari

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Abstract

The reaction of a square-planar platinum(II) complex containing two bis(2-diphenylphosphinoethyl)phenylphosphine (triphos), [Pt(triphos)₂](NO₃)₂, with [Au(tu)₂]Cl (tu = thiourea) gave a new trinuclear Au^I₂Pt^II complex, [Pt(triphos)₂{Au(tu)}₂]Cl₂(NO₃)₂, through Au-P coordination. While the [Pt(triphos)₂]²⁺ unit in [Pt(triphos)₂](NO₃)₂ adopted the trans-meso configuration, only the cis-racemic isomer was observed for [Pt(triphos)₂{Au(tu)}₂]Cl₂(NO₃)₂. ³¹P NMR spectroscopy indicated rapid equilibrium among the possible isomers of [Pt(triphos)₂]²⁺, which facilitated the trans-to-cis transformation at the Pt^II center in this system. Additionally, we observed that this structural transformation led to an increase in the emission intensity.

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带有两个三膦配体的铂(II)配合物通过与金(I)离子配位实现反式-顺式异构化

含有两个双（2-二苯基膦乙基）苯基膦（三磷）的方形平面铂(II)配合物[Pt(triphos)2](NO3)2与[Au(tu)2]Cl（tu = 硫脲）反应，通过 Au-P 配位得到了新的三核 AuI2PtII 配合物[Pt(triphos)2{Au(tu)}2]Cl2(NO3)2。虽然[Pt(triphos)2](NO3)2 中的[Pt(triphos)2]2+单元采用了反式中位构型，但在[Pt(triphos)2{Au(tu)}2]Cl2(NO3)2 中只观察到顺式外消旋异构体。31P NMR 光谱显示，[Pt(triphos)2]2+ 的可能异构体之间迅速达到平衡，这促进了该体系中 PtII 中心的反式到顺式转化。此外，我们还观察到这种结构转变导致了发射强度的增加。

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来源期刊

Journal of Inclusion Phenomena and Macrocyclic Chemistry 化学-化学综合

CiteScore

3.30

自引率

8.70%

发文量

审稿时长

3-8 weeks

期刊介绍： The Journal of Inclusion Phenomena and Macrocyclic Chemistry is the premier interdisciplinary publication reporting on original research into all aspects of host-guest systems. Examples of specific areas of interest are: the preparation and characterization of new hosts and new host-guest systems, especially those involving macrocyclic ligands; crystallographic, spectroscopic, thermodynamic and theoretical studies; applications in chromatography and inclusion polymerization; enzyme modelling; molecular recognition and catalysis by inclusion compounds; intercalates in biological and non-biological systems, cyclodextrin complexes and their applications in the agriculture, flavoring, food and pharmaceutical industries; synthesis, characterization and applications of zeolites. The journal publishes primarily reports of original research and preliminary communications, provided the latter represent a significant advance in the understanding of inclusion science. Critical reviews dealing with recent advances in the field are a periodic feature of the journal.