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An Al(III) complex, Al-Salp-(H2O)2NO3 (Salp-Al, Salp = N,N'-bis(salicylidene)-1,2-phenylenediamine), is synthesized from the Schiff base ligand Salp. Salp-Al can emit green light in DMF/H2O solution or in solid state and is characterized by XPS, SEM, FT-IR, NMR and TGA. The Salp-Al shows a response to Fe3+ and nitrobenzene in DMF/H2O as a turn-off chemosensor with a limit of detection of 0.4 × 10−4 M and 4.6 × 10−5 M, respectively. Salp-Al can also be applied to detect toluene in DMF/H2O as a turn-on chemosensor with an excellent limit of detection of 4.3 × 10−4 M. The fluorescence lifetime of Salp-Al is 1.94 ns. [ABSTRACT FROM AUTHOR]

Four organotin(IV) complexes based on 2-(trifluoromethyl)benzeneseleninic acid, [Me3Sn(O2SeC6H4-2-CF3)]4(1), [Ph3Sn(O2SeC6H4-2-CF3)]n(2), [R2Sn(O2SeC6H4-2-CF3)2]n(R = Me3;n-Bu4), have been synthesized and characterized by X-ray diffraction, elemental analysis, infrared spectroscopy, and NMR (1H,13C and119Sn) spectroscopy. Single-crystal X-ray analyses show that1has a centrosymmetric tetranuclear triorganotin selenite with a tetranuclear 16-membered macrocycle formed by trimethyltin and ligand alternately linking;2exhibits a 1-D neutral infinite chain structure in which the [O2SeC6H4-2-CF3]−is a μ2-bridging ligand;3and4are polymeric chain structures containing Sn2O4Se2eight-membered rings where the areneseleninate groups are double bridges between the tin ions. Examination of the intermolecular contacts of1reveals the existence of the C–H⋯O hydrogen bonding interactions and C–H⋯π interactions. Weak C–H⋯O interactions were also found to be important for the formation of the 3-D structure for3. [ABSTRACT FROM AUTHOR]

Four newμ2-oxo-bridged dinuclear aryltelluronic triorganotin esters [ArTe(μ-O)(OH)(OSnR3)2]2(Ar = n-propyl-Ph,R = Me:1,R = Ph:2; Ar = i-propyl-Ph,R = Me:3,R = Ph:4) were synthesized by reaction ofμ2-oxo-bridged dinuclear aryltelluronic acids and the corresponding R3SnCl (R = Me, Ph) with potassium hydroxide in methanol. The complexes were characterized by X-ray crystallography, elemental analysis, FT-IR, and NMR (1H,13C,119Sn) spectroscopy. The structural analysis indicates that these complexes are isostructural and crystallized as Sn4Te2molecules, in which the asymmetric four-membered Te2(μ2-O)2units are situated in the center. The geometry of tellurium is described as a distorted octahedron and each tin is described as a distorted tetrahedron. Complex2has a 2-D network structure connected by intermolecular C–H⋯π interactions. Complexes1–4were tested forin vitrocytotoxicity against human lung cancer cells (A549) and human hepatocellular carcinoma cells (HepG2). [ABSTRACT FROM AUTHOR]