The ratio of monomers in PLA-co-PCL copolymer was assessed via HNMR on an ARX 300 MHz NMR spectrometer (Bruker, Billerica, MA, USA) in chloroform-d at 25 °C. The ratio between peak integrals of lactide monomer proton-derived multiplet at 5.10 ppm and ε-CL proton-derived triplet at 4.05 ppm were employed in calculations.
Arx 300 mhz nmr spectrometer
Manufactured by Bruker
Sourced in United States
The ARX 300 MHz NMR spectrometer is a nuclear magnetic resonance (NMR) instrument designed for routine analytical applications. It operates at a static magnetic field strength of 7 Tesla, corresponding to a proton resonance frequency of 300 MHz. The ARX 300 MHz NMR spectrometer is capable of acquiring high-resolution one-dimensional (1D) NMR data.
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Lab products found in correlation
Silica gel, by Merck Group (2 mentions)
Alugram sil g uv254, by Macherey-Nagel (1 mentions)
Nicolet is50 ft ir, by Thermo Fisher Scientific (1 mentions)
Avance 3 600 mhz spectrometer, by Bruker (1 mentions)
Cdcl3, by Merck Group (1 mentions)
Lithium aluminium hydride, by Merck Group (1 mentions)
Amines, by Merck Group (1 mentions)
4 protocols using arx 300 mhz nmr spectrometer
1
Determining PLA-co-PCL Copolymer Composition
2
Quantitative NMR Analysis of Copolymer Composition
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The proton nuclear magnetic resonance analysis of copolymerization products was performed on an ARX 300 MHz NMR spectrometer (Bruker, Billerica, MA, USA) in chloroform-d at 25 °C. Obtained spectra were used exclusively to estimate the ratio between monomers building poly(d ,l -lactide-co-ε-caprolactone) chains. Peak integrals of LA proton-derived multiplet present at 5.10 ppm and ε-CL proton-derived triplet at 4.05 ppm were employed in calculations.
3
Synthesis of Benzylamine Derivatives
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Reagents were purchased and used without purification. Amines; benzyl chlorides; LiAlH4 (lithium aluminum hydride), reagent grade 95; POCl3; silica gel, 200–400 mesh, 60 Å for column chromatography; and solvents for NMR spectroscopy were supplied by Merck, Darmstadt, Germany. Other reagents were provided by Chempur, Piekary Śląskie, Poland. TLC sheets, Alugram SIL G/UV254, were obtained from Macherey-Nagel, Düren, Germany.
All melting points were uncorrected and determined by the open capillary method with an Electrothermal IA9100 melting point apparatus. NMR spectra were recorded using a Bruker ARX 300 MHz NMR spectrometer. The abbreviations used in NMR spectra are: s—singlet, d—doublet, t—triplet, q—quartet, and m—multiplet. IR spectra were recorded with a Thermo Scientific USA Nicolet iS50 FTIR using the ATR technique. MS spectra were recorded with a Bruker Daltonic Compact using the ESI technique.
All melting points were uncorrected and determined by the open capillary method with an Electrothermal IA9100 melting point apparatus. NMR spectra were recorded using a Bruker ARX 300 MHz NMR spectrometer. The abbreviations used in NMR spectra are: s—singlet, d—doublet, t—triplet, q—quartet, and m—multiplet. IR spectra were recorded with a Thermo Scientific USA Nicolet iS50 FTIR using the ATR technique. MS spectra were recorded with a Bruker Daltonic Compact using the ESI technique.
4
Synthesis of Substituted Amines via Reduction
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The reagents were purchased and used without purification. Lithium aluminium hydride, reagent grade 95%; pyridinium chlorochromate, 98%; thionyl chloride; silica gel, 200–400 mesh, 60 Å for column chromatography; CDCl3 for NMR spectroscopy; and amines were supplied by Sigma Aldrich, Darmstadt, Germany. Other reagents were provided by Chempur, Piekary Śląskie, Poland. TLC sheets Alugram SIL G/UV254 were obtained from Mecherey-Nagel, Germany.
NMR spectra were recorded on a Bruker ARX 300 MHz NMR Spectrometer. Chemical shifts (δ in ppm) were obtained from internal solvent-CDCl3 7.26 ppm for 1H. 13 C and 19F NMR spectra were acquired on a Bruker Avance III 600 MHz spectrometer (Bruker Biospin GmbH, Ettlingen, Germany). Abbreviations used in NMR spectra: s—singlet, d—doublet, t—triplet, q—quartet, sx—sextet, m—multiplet. HR-MS spectra were recorded on a Bruker Daltonic model Compact, using the ESI technique. IR spectra were recorded on a Thermo Scientific Inc. (Waltham, MA, USA) model Nicolet iS50 FT-IR using the ATR technique.
NMR spectra were recorded on a Bruker ARX 300 MHz NMR Spectrometer. Chemical shifts (δ in ppm) were obtained from internal solvent-CDCl3 7.26 ppm for 1H. 13 C and 19F NMR spectra were acquired on a Bruker Avance III 600 MHz spectrometer (Bruker Biospin GmbH, Ettlingen, Germany). Abbreviations used in NMR spectra: s—singlet, d—doublet, t—triplet, q—quartet, sx—sextet, m—multiplet. HR-MS spectra were recorded on a Bruker Daltonic model Compact, using the ESI technique. IR spectra were recorded on a Thermo Scientific Inc. (Waltham, MA, USA) model Nicolet iS50 FT-IR using the ATR technique.
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