Uv 3600 plus

The preparative work was carried out under a nitrogen atmosphere using standard Schlenk techniques. Solvents used for reaction were freshly distilled under nitrogen from either sodium or calcium hydride prior to use. Reactants 6,9-bis(1,1'thiobis(ethane))decaborane (B 10 H 12 (Et 2 S) 2 ), 18 9,9-dimethyl-2-(2phenylethynyl)-9H-Fluorene 19 (1a) and 2,2'-(1,2-ethynediyl)bis[9,9dimethyl-9H-Fluorene] 20 (1c) were prepared according to literature methods. Other chemicals such as 2-iodo-9,9-dimethylfluorene and 2-bromo-9,9-diphenylfluorene were commercial products and were used as received. The NMR data were obtained on a Bruker DRX 400 spectrometer; chemical shifts are given with respect to CHCl 3 /CDCl 3 (δ 1 H = 7.26 ppm, δ 13 C = 77.00 ppm) and external BF 3 •Et 2 O (δ 11 B = 0 ppm). Mass spectral data were recorded on Micromass/Waters GCT premier with a high-resolution gas chromatography/time-of-flight mass spectrometer. Elemental analyses were performed on Elementar vario MICRO cube (Germany). The absorption and photoluminescence spectra were recorded on an UV-Vis-NIR spectrophotometer (Shimadzu UV-3600 Plus) and a fluorescence spectrophotometer (Hitachi F-4600) equipped with a high performance R928 photomultiplier detector.