Potential Switchable Circularly Polarized Luminescence from Chiral Cyclometalated Platinum(II) Complexes

被引：105

作者：

Zhang, Xiao-Peng ^{[1
]}

Chang, Victoria Y. ^{[2
]}

Liu, Jian ^{[1
]}

Yang, Xiao-Liang ^{[1
]}

Huang, Wei ^{[1
]}

Li, Yizhi ^{[1
]}

Li, Cheng-Hui ^{[1
]}

Muller, Gilles ^{[2
]}

You, Xiao-Zeng ^{[1
]}

机构：

[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing 210093, Jiangsu, Peoples R China

[2] San Jose State Univ, Dept Chem, San Jose, CA 95192 USA

来源：

INORGANIC CHEMISTRY | 2015年 / 54卷 / 01期

基金：

美国国家卫生研究院; 中国国家自然科学基金;

关键词：

PI-CONJUGATED MOLECULES; LANTHANIDE(III) COMPLEXES; PHOTOPHYSICAL PROPERTIES; LIGANDS; SPECTROSCOPY; EMISSION; POLYMERS; ELECTROCHEMISTRY; PHOSPHORESCENT; RUTHENIUM(II);

D O I：

10.1021/ic5019136

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of chiral cyclometalated platinum(II) complexes, [Pt((-)-L-1)(Dmpi)]Cl ((-)-1), [Pt((+)-L-1)(Dmpi)]Cl ((+)-1), [Pt((-)-L-2)(Dmpi)]Cl ((-)-2), [Pt((+)-L-2)(Dmpi)]Cl ((+)-2), [Pt-3((-)-L-2)(2)(Dmpi)(4)](ClO4)(4) ((-)-3), and [Pt-3((+)-L-2)(2)(Dmpi)(4)](ClO4)(4) ((+)-3) [(-)-L-1 = (-)-4,5-pinene-6'-phenyl-2,2'-bipyridine, (+)-L-1 = (+)-4,5-pinene-6'-phenyl-2,2'-bipyridine), (-)-L-2 = (-)-1,3-bis(2-(4,5-pinene)pyridyl)benzene, (+)-L-2 = (+)-1,3-bis(2-(4,5-pinene)pyridyl)benzene, Dmpi = 2,6-dimethylphenyl isocyanide], have been designed and synthesized. In aqueous solutions, (-)-1 and (+)-1 aggregate into one-dimensional helical chain structures through PtPt, p-p, and hydrophobic-hydrophobic interactions. (-)-3 and (+)-3 represent a novel helical structure with Pt-Pt bonds. The formation of helical structures results in enhanced and distinct chiroptical properties as evidenced by circular dichroism spectra. Circularly polarized luminescence (CPL) was observed from the aggregates of (-)-1 and (+)-1 in water, as well as (-)-3 and (+)-3 in dichloromethane. The CPL activity can be switched reversibly (for (-)-1 and (+)-1) or irreversibly (for (-)-3 and (+)-3) by varying the temperature.

引用

页码：143 / 152

页数：10