Jms 700n spectrometer

NMR spectra were recorded on a JEOL JNM-AL 400 Fourier-transform NMR spectrometers (400 MHz). The chemical shifts of the ¹H, ¹³C{¹H}, ¹¹B{¹H} and ¹⁹F{¹H} NMR spectra determined in CDCl₃ were given in ppm relative to tetramethylsilane (0.00 ppm for ¹H and ¹³C{¹H}) as an internal standard, or boron trifluoride diethyl-ether complex (0.00 ppm for ¹¹B{¹H}) and hexafluorobenzene (−164.9 ppm vs. CFCl₃ for ¹⁹F{¹H}) as external standards. High-resolution fast-atom bombardment mass spectroscopies (HR-FAB-MS) were carried out on a JEOL JMS-700N spectrometer. Elemental analyses (C, H, N) were performed by a Perkin Elmer 2400II elemental analyzer. UV-vis absorption spectra were recorded on a Jasco V-560 spectrophotometer. The corrected emission spectra were obtained by using a Jasco F-6500 spectrofluorometer (excitation wavelength = 365 nm). Fluorescence decay measurements were conducted by using a Hamamatsu Photonics picosecond fluorescence lifetime measurement system C11200 equipped with picosecond light pulser PLP-10 as a 405 nm excitation light source. Emission quantum yields were determined by using a Hamamatsu Photonic Absolute PL Quantum Yield Measurement System C9920-02 (excitation wavelength = 365 nm). For the photophysical measurements, spectrophotometric-grade toluene was used as supplied.

All reagents were purchased from commercial
sources and used without further purification. Dry THF was also purchased
from a commercial source and used as received. Gravity column chromatography
was performed using Kanto Chemical Co. spherical silica gel 60N with
a particle size of 63–210 μm. ¹H, ¹³C, and ¹⁹F NMR spectra were recorded on Bruker AVANCE
III 400 spectrometer (400 MHz, 100 MHz, and 376 MHz, respectively).
All chemical shifts (δ) are reported in ppm and coupling constants
(J) are in Hz. The ¹H and ¹³C NMR chemical shifts are relative to tetramethylsilane; the resonance
of the residual protons of chloroform was used as an internal standard
for ¹H (δ 7.26 ppm) and all-d solvent peaks for ¹³C (δ 77.0 ppm).^{18 (link)} The assignments
of the ¹³C NMR were performed by DEPT experiments. ¹⁹F NMR chemical shifts are relative to hexafluorobenzene in
CDCl₃ at δ = -163.0 ppm (external reference).^{19 (link)} High-resolution mass spectra were recorded on
a JEOL JMS-700N spectrometer. Melting points were recorded on an Anatec
Yanaco MP-J3 and were uncorrected. Geometrical optimization was carried
out at the B3LYP/6-31g(d,p) level of theory implemented on the Gaussian
09 package.¹⁶