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首页> 外文期刊>Chemistry: A European journal >Stepwise Strategy to Cyclometallated Pt-II Complexes with N-Heterocyclic Carbene Ligands: A Luminescence Study on New beta-Diketonate Complexes
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Stepwise Strategy to Cyclometallated Pt-II Complexes with N-Heterocyclic Carbene Ligands: A Luminescence Study on New beta-Diketonate Complexes

机译：N-杂环碳原子配体环金属化的Pt-II配合物的逐步策略：新型β-二酮酸酯配合物的发光研究

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摘要

The imidazolium salt 3-methyl-1-(naphthalen-2-yl)-1H-imidazolium iodide (2) has been treated with silver(I) oxide and [{Pt(mu-Cl)(eta(3)-2-Me-C3H4)}(2)] (eta(3)-2-Me-C3H4 = eta(3)-2-methylallyl) to give the intermediate N-heterocyclic carbene complex [PtCl(eta(3)-2-Me-C3H4)(H (CC) over cap*-kappa C*)] (3) (H (CC) over cap*-kappa C* = 3-methyl-1-(naphthalen-2-yl)-1H-imidazol-2-ylidene). Compound 3 undergoes regiospecific cyclometallation at the naphthyl ring of the NHC ligand to give the five-membered platinacycle compound [{Pt(mu-Cl)((CC) over cap*)}(2)] (4). Chlorine abstraction from 4 with beta-diketonate Tl derivatives rendered the corresponding neutral compounds [Pt((CC) over cap*)(L-O,O')] {L = acac (HL = acetylacetone) 5, phacac (HL = 1,3-diphenyl-1,3-propanedione) 6, hfacac (HL = hexafluoroacetylacetone) 7}. All of the compounds (3-7) were fully characterized by standard spectroscopic and analytical methods. X-ray diffraction studies were performed on 5-7, revealing short Pt-Pt and pi-pi interactions in the solid-state structure. The influence of the R-substituents of the beta-diketonate ligand on the photophysical properties and the use of the most efficient emitter, 5, as phosphor converter has also been studied.
机译：咪唑鎓盐3-甲基-1-（萘-2-基）-1H-碘咪唑鎓碘化物（2）已用氧化银（I）和[{Pt（mu-Cl）（eta（3）-2- Me-C3H4）}（2）]（eta（3）-2-Me-​​C3H4 = eta（3）-2-甲基烯丙基）得到中间体N-杂环卡宾配合物[PtCl（eta（3）-2-Me -（C3H4）（H（CC）超过**-C的C *）]]（3）（H（CC）超过**-C *的H（CC）= 3-甲基-1-（萘-2-基）-1H-咪唑-2-亚烷基）。化合物3在NHC配体的萘环上进行区域特异性的环金属化反应，得到五元铂环化合物[[Pt（mu-Cl）（（CC）over cap *）}（2）]（4）。用β-二酮基Tl衍生物从4中提取氯得到了相应的中性化合物[Pt（（CC）over **（LO，O'）] {L = acac（HL =乙酰丙酮）5，phacac（HL = 1,3 -二苯基-1，3-丙二酮）6，hfacac（HL ＝六氟乙酰丙酮）7}。所有化合物（3-7）均通过标准的光谱和分析方法进行了全面表征。在5-7上进行了X射线衍射研究，揭示了固态结构中短的Pt-Pt和pi-pi相互作用。还研究了β-二酮酸酯配体的R取代基对光物理性质的影响以及使用最有效的发射体5作为荧光粉转换器的影响。

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