title: Self-Assembly of New Arene-Ruthenium Rectangles Containing Triptycene Building Block and Their Application in Fluorescent Detection of Nitro Aromatics.
abstract: A suite of two new tetraruthenium metallarectangles5and6have been obtained from [2 + 2] self-assemblies between dipyridylethynyltriptycene2and one of the two dinuclear arene ruthenium clips, [Ru2(μ-η4-OO∩OO) (η6-p-cymene)2][OTf]2; (OO∩OO = oxalate3; 6,11-dihydroxy-5,12-naphthacenedionato (dotq)4; OTf = triflate). These molecular rectangles are fully characterized by1H NMR spectroscopy, electrospray mass spectrometry. A single crystal of6was suitable for X-ray diffraction structural characterization. These new metallarectangles showed fluorescence behavior in solution, have been examined for emission quenching effects with various aromatic compounds, and show high quenching selectivity and sensitivity towards nitroaromatics, particularly picric acid and trinitrotoluene. Excited-state charge transfer from the rectangles to nitro aromatic substrates can be used to develop selective fluorescent sensors for nitro aromatics.
authors: Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea.
authors: Abhishek
authors: A
authors: Dubey
authors: Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea.
authors: Anurag
authors: A
authors: Mishra
authors: Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea.
authors: Jin Wook
authors: JW
authors: Min
authors: Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea.
authors: Min Hyung
authors: MH
authors: Lee
authors: Energy Materials and Convergence Research Department, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea.
authors: Hyunuk
authors: H
authors: Kim
authors: Department of Chemistry, Salt Lake City, Utah 84112-0850, U.S.A.
authors: Peter J
authors: PJ
authors: Stang
authors: Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea.
authors: Ki-Whan
authors: KW
authors: Chi
keywords: Fluorescent; Metalla-rectangle; Nitro aromatics; Ruthenium; Self-assembly