A new totally flat N(sp2)C(sp2)N(sp2) pincer palladacycle:: Synthesis and photoluminescent properties

被引：46

作者：

Consorti, CS

Ebeling, G

Rodembusch, F

Stefani, V

Livotto, PR

Rominger, F

Quina, FH

Yihwa, C

Dupont, J

机构：

[1] Univ Fed Rio Grande do Sul, Inst Chem, Lab Mol Catalysis, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Inst Chem, Lab Theoret Chem, BR-91501970 Porto Alegre, RS, Brazil

[3] Univ Fed Rio Grande do Sul, Inst Chem, Lab New Organ Mat, BR-91501970 Porto Alegre, RS, Brazil

[4] Heidelberg Univ, Inst Organ Chem, D-69120 Heidelberg, Germany

[5] Univ Sao Paulo, Inst Quim, BR-05599970 Sao Paulo, Brazil

来源：

INORGANIC CHEMISTRY | 2004年 / 43卷 / 02期

关键词：

D O I：

10.1021/ic0346679

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The Sonogashira coupling of 2-bromopyridine with 8-quinolinyl-acetylene affords 2-pyridinyl-8-quinolinyl-acetylene (1) in high yields. The chloropalladation of 1 with Li2PdCl4 in methanol at room temperature affords the pincer palladacycle (C5H4N-2-C=C(Cl)-8-C(9)H(6)kappaN,kappaC,kappaN)PdCl (2) in 63% yield. The X-ray molecular structure of (2) shows that it is totally flat and that it is associated in pairs though pi-stacking between alternate pyridine-quinoline moieties (3.448 Angstrom). The pairs are also connected by pi-stacking with an interpair distance of 3.452 Angstrom between quinoline-quinoline moieties. A very low fluorescence emission was also revealed by the pincer palladacycle 2 in both solution and the solid state, which has been ascribed to an excimeric emission due to the particular structure (rigid and totally flat) of 2 in the solid state.

引用

页码：530 / 536

页数：7

共 45 条

[1] Synthesis and spectroscopic characterization of organometallic chromophores for photoluminescent materials: cyclopalladated complexes [J].