Chiral-at-Metal Phosphorescent Square-Planar Pt(II)-Complexes from an Achiral Organometallic Ligand

被引：107

作者：

Schulte, Thorben R. ^{[1
]}

Holstein, Julian J. ^{[1
]}

Krause, Lennard ^{[2
]}

Michel, Reent ^{[2
]}

Stalke, Dietmar ^{[2
]}

Sakuda, Eri ^{[3
]}

Umakoshi, Keisuke ^{[3
]}

Longhi, Giovanna ^{[4
]}

Abbate, Sergio ^{[4
]}

Clever, Guido H. ^{[1
]}

机构：

[1] TU Dortmund Univ, Dept Chem & Chem Biol, Otto Hahn Str 6, D-44227 Dortmund, Germany

[2] Georg August Univ Gottingen, Inst Inorgan Chem, Tammannstr 4, D-37077 Gottingen, Germany

[3] Nagasaki Univ, Div Chem & Mat Sci, Grad Sch Engn, Bunkyo Machi, Nagasaki 8528521, Japan

[4] Univ Brescia, Dipartimento Med Mol & Traslaz, Viale Europa 11, I-25123 Brescia, Italy

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2017年 / 139卷 / 20期

关键词：

CIRCULARLY-POLARIZED LUMINESCENCE; CIS-BIS(2-PHENYLPYRIDINE)PLATINUM(II) CBPPP; STRUCTURAL-CHARACTERIZATION; CHIROPTICAL PROPERTIES; COMPLEXES; PLATINUM(II); PALLADIUM(II); ELECTROLUMINESCENCE; 2-PHENYLPYRIDINE; PHOTOCHEMISTRY;

D O I：

10.1021/jacs.7b03963

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The synthesis and characterization of a new kind of cis- and trans-cyclometalated square-planar platinum(II) complexes is reported. Uncharged organometallic compounds carrying one or two of the CAN-donor ligand L-CN were prepared. Due to the heterobidentate coordination of the achiral chelate ligand, the formed [ptL(CN)Cl(SEt2)], cis- and trans-[PtL2CN] complexes are chiral with the metal serving as the stereo center. The enantiomers of complex trans-[PtL2CN] could be separated and their absolute configuration was determined by anomalous X-ray diffraction, in accordance with CD spectroscopic results and TD-DFT calculations. All compounds were fully characterized by NMR spectroscopy, mass spectrometry and X-ray structure determination. The photophysical properties of trans-[PtL2CN]] have been investigated showing phosphorescence in solution and in the solid state with a moderate quantum yield. For the enantiomers, strong circular dichroism (CD) and circularly polarized luminescence (CPL) effects were observed, rendering this new structural motif suitable for application in chiroptical and luminescent materials.

引用

页码：6863 / 6866

页数：4

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