1H NMR studies
were carried out on a Bruker Avance III 400 spectrometer, and standard
references were used: tetramethylsilane (TMS) (δ 1H (400 MHz) = 0 and δ 13C (100 MHz) = 0). 7Li, 23Na, and 39K NMR experiments were carried
out at 298 K using NaCl, KCl, and LiCl 0.5 M in D2O as
an external reference, respectively. The parameters for the three
metals were: 7Li recorded at 155.50 MHz with a spectral
sweep (sw) of 24,000 Hz; 23Na at 105.86 MHz, sw of 20,000
Hz; and 39K at 18.67 MHz, sw 20,000 Hz. IR spectra were
recorded on a PerkinElmer FTIR/FIR Spectrometer model FRONTIER using
attenuated total reflection (ATR) and KBr pellet techniques. Mass
spectrometry was conducted on an Agilent 6100 LC/MS using the ESI+ mode. UV–vis measurements were performed on an Agilent
8435 (Agilent Technologies) diode array with a quartz cell 1 cm optical
path. Fluorescence studies were carried out on a Lambda LB-50 with
a xenon lamp, quantifications consisting of 1–1000 light pulses
per measurement, depending on the required reading quality and speed,
and with a glass cell with 1 cm light path. Melting points were recorded
on a Büchi melting point B-545 apparatus.
were carried out on a Bruker Avance III 400 spectrometer, and standard
references were used: tetramethylsilane (TMS) (δ 1H (400 MHz) = 0 and δ 13C (100 MHz) = 0). 7Li, 23Na, and 39K NMR experiments were carried
out at 298 K using NaCl, KCl, and LiCl 0.5 M in D2O as
an external reference, respectively. The parameters for the three
metals were: 7Li recorded at 155.50 MHz with a spectral
sweep (sw) of 24,000 Hz; 23Na at 105.86 MHz, sw of 20,000
Hz; and 39K at 18.67 MHz, sw 20,000 Hz. IR spectra were
recorded on a PerkinElmer FTIR/FIR Spectrometer model FRONTIER using
attenuated total reflection (ATR) and KBr pellet techniques. Mass
spectrometry was conducted on an Agilent 6100 LC/MS using the ESI+ mode. UV–vis measurements were performed on an Agilent
8435 (Agilent Technologies) diode array with a quartz cell 1 cm optical
path. Fluorescence studies were carried out on a Lambda LB-50 with
a xenon lamp, quantifications consisting of 1–1000 light pulses
per measurement, depending on the required reading quality and speed,
and with a glass cell with 1 cm light path. Melting points were recorded
on a Büchi melting point B-545 apparatus.