Coordination-Driven Self-Assembly of M3L2 Trigonal Cages from Preorganized Metalloligands Incorporating Octahedral Metal Centers and Fluorescent Detection of Nitroaromatics

• DOI: 10.1021/ic1020719
• Publication Date: 2011-01-07T14:42:18Z
• Authors: Ming Wang; Vaishali Vajpayee; Sankarasekaran Sh...; Yao-Rong Zheng; Zhigang Zhao; Hyunuk Kim; Partha Sarathi Mu...; Ki-Whan Chi; Peter J. Stang
• Keywords: Trigonal crystal system

The design and preparation of novel M(3)L(2) trigonal cages via the coordination-driven self-assembly preorganized metalloligands containing octahedral aluminum(III), gallium(III), or ruthenium(II) centers is described. When tritopic dinuclear linear appropriate complementary subunits are employed, trigonal-bipyramidal trigonal-prismatic self-assembled under mild conditions. These three-dimensional were characterized with multinuclear NMR spectroscopy ((1)H (31)P) high-resolution electrospray ionization mass spectrometry. structure one such cage, from an arene ruthenium metalloligand, was confirmed single-crystal X-ray crystallography. fluorescent nature these prisms, due to presence their electron-rich ethynyl functionalities, prompted photophysical studies, which revealed that electron-deficient nitroaromatics effective quenchers cages' emission. Excited-state charge transfer prisms nitroaromatic substrates can be used as basis for development selective discriminatory turn-off sensors nitroaromatics.