The microstructure of the resulted poly(β-myrcene) samples was calculated by 1H and 13C nuclear magnetic resonance (NMR) acquired in a Bruker BioSpin-400 MHz spectrometer, using 16 and 140,000 scans, respectively. CDCl3 was used as a solvent and the analyses were performed at 25 °C. A concentration of 15 mg of sample in 1 mL of CDCl3 was used for the 1H-NMR spectra and 80 mg of sample in 1 mg of CDCl3 for the 13C-NMR spectra.
Biospin 400 mhz spectrometer
Manufactured by Bruker
The BioSpin-400 MHz spectrometer is a nuclear magnetic resonance (NMR) spectrometer designed for analytical and research applications. It operates at a frequency of 400 MHz and is capable of analyzing a wide range of chemical and biological samples.
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2 protocols using biospin 400 mhz spectrometer
1
Poly(β-myrcene) Microstructural Analysis
2
Characterization of Organic Aggregates
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1H NMR
spectra were obtained on a Bruker BioSpin 400 MHz spectrometer at
ambient temperature using tetramethylsilane as an internal standard.
A Bruker micrOTOF-Q11 mass spectrometer was employed for the measurements
of mass spectra. UV/vis and fluorescence spectra were recorded using
a Cary 100 Bio UV/vis spectrophotometer and a Cary Eclipse fluorescence
spectrophotometer, respectively. Time-resolved fluorescence measurements
were carried out by using a time-correlated single-photon counting
spectrometer (Edinburgh, OB920). A light-emitting diode laser, EPL
375 nm, was used to excite the molecule, and an MCP photomultiplier
(Hamamatsu R3809U-50) was used as the detector (response time, 40
ps). The lamp profile was recorded by using a scatterer (dilute ludox
solution in water) in place of the sample. Decay curves were analyzed
by a nonlinear least-squares iteration procedure using the F900 decay
analysis software. The quality of the fit was judged by the chi-squared
(χ2) values and visual inspection of weighted deviations
of residuals. In particular, a field emission scanning electron microscope
from ZEISS was used to capture the images of organic aggregates. The
aggregate sizes were determined through the dynamic light scattering
(DLS) method using Malvern Zetasizer instrument.
spectra were obtained on a Bruker BioSpin 400 MHz spectrometer at
ambient temperature using tetramethylsilane as an internal standard.
A Bruker micrOTOF-Q11 mass spectrometer was employed for the measurements
of mass spectra. UV/vis and fluorescence spectra were recorded using
a Cary 100 Bio UV/vis spectrophotometer and a Cary Eclipse fluorescence
spectrophotometer, respectively. Time-resolved fluorescence measurements
were carried out by using a time-correlated single-photon counting
spectrometer (Edinburgh, OB920). A light-emitting diode laser, EPL
375 nm, was used to excite the molecule, and an MCP photomultiplier
(Hamamatsu R3809U-50) was used as the detector (response time, 40
ps). The lamp profile was recorded by using a scatterer (dilute ludox
solution in water) in place of the sample. Decay curves were analyzed
by a nonlinear least-squares iteration procedure using the F900 decay
analysis software. The quality of the fit was judged by the chi-squared
(χ2) values and visual inspection of weighted deviations
of residuals. In particular, a field emission scanning electron microscope
from ZEISS was used to capture the images of organic aggregates. The
aggregate sizes were determined through the dynamic light scattering
(DLS) method using Malvern Zetasizer instrument.
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