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Cary 300 double beam spectrometer

Manufactured by Agilent Technologies

The Cary 300 double beam spectrometer is a laboratory instrument designed for ultraviolet-visible (UV-Vis) spectroscopic analysis. It is equipped with a double beam optical system, which allows for the simultaneous measurement of a sample and a reference. The instrument is capable of performing a range of spectroscopic measurements, including absorbance, transmittance, and reflectance, across a wavelength range of 190 to 900 nanometers.

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2 protocols using cary 300 double beam spectrometer

1

Photophysical Characterization of Organic Compounds

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UV–vis absorption spectra were recorded with a Varian Cary 300 double beam spectrometer. Luminescence spectra were measured for air-saturated and degassed diluted (c ≈ 5·10–5 M) solutions in ethanol with a Horiba Jobin Yvon Fluorolog 3 steady-state fluorescence spectrometer. For decay time measurements a PicoQuant LDH-P-C-375 pulsed diode laser (λexc = 372 nm, pulse width 100 ps) was applied as the excitation source. The emission signal was detected with a cooled photomultiplier attached to a FAST ComTec multichannel scalar card with a time resolution of 250 ps. Photoluminescence quantum yields PL were determined with a Hamamatsu C9920-02 system equipped with a Spectralon® integrating sphere.
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2

Synthesis and Characterization of Oxygenated Compounds

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All reactions were carried out under an atmosphere of argon using standard Schlenk techniques. Chromatographic separations were carried out using silica gel 60 (Merck, 230-400 mesh ASTM). Dichloromethane was purified by distillation from CaH 2 prior to use and methanol was purified by distillation over magnesium. 2,3-Dimethyl-1,3-butadiene, m-chloroperoxybenzoic acid, 30% hydrogen peroxide and selenium dioxide were purchased from commercial suppliers and were used without further purification.
Instruments 1 H NMR (600 MHz) and 13 C{H} NMR (150 MHz) spectra were recorded with a Bruker Avance III 600 spectrometer operating at 298 K in the Fourier transform mode. Chemical shifts are reported in δ units ( ppm) using as residual CDCl 3 ( 1 H δ 7.26 ppm, 13 C δ 77.00 ppm) as the reference. Infrared spectra were recorded with a FTIR Nexus Nicolet apparatus. Mass spectra were recorded with a Varian 500-MS iT mass spectrometer (ESI) or with a Finnigan Mat95 mass spectrometer (EI). Microanalyses were determined by Analytical Services of the Polish Academy of the Sciences, Łódź. UV-Vis absorption spectra were recorded with a Varian Cary 300 double beam spectrometer.
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