Aggregation of sodium dodecyl sulfate in poly(ethylene glycol) aqueous solution studied by 1H NMR spectroscopy

2002 ◽  
Vol 280 (5) ◽  
pp. 479-484 ◽  
Author(s):  
H.Z. Yuan ◽  
L. Luo ◽  
L. Zhang ◽  
S. Zhao ◽  
S.Z. Mao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Nmr Spectroscopy ◽  
Sodium Dodecyl Sulfate ◽  
Ethylene Glycol ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Sodium Dodecyl ◽  
Poly Ethylene Glycol ◽  
Dodecyl Sulfate ◽  
Poly Ethylene

On the Interaction of Sodium Dodecyl Sulfate with Oligomers of Poly(Ethylene Glycol) in Aqueous Solution

2004 ◽  
Vol 108 (26) ◽  
pp. 8960-8969 ◽  
Author(s):  
Luca Bernazzani ◽  
Silvia Borsacchi ◽  
Donata Catalano ◽  
Paolo Gianni ◽  
Vincenzo Mollica ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sodium Dodecyl Sulfate ◽  
Ethylene Glycol ◽  
Sodium Dodecyl ◽  
Poly Ethylene Glycol ◽  
Dodecyl Sulfate ◽  
Poly Ethylene

scholarly journals Synthesis of Mono- and Dithiols of Tetraethylene Glycol and Poly(ethylene glycol)s via Enzyme Catalysis

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 228 ◽  
Author(s):  
Prajakatta Mulay ◽  
Gayatri Shrikhande ◽  
Judit Puskas
Keyword(s):  
Nmr Spectroscopy ◽  
Ethylene Glycol ◽  
1H Nmr ◽  
Enzyme Catalysis ◽  
1H Nmr Spectroscopy ◽  
13C Nmr Spectroscopy ◽  
Tetraethylene Glycol ◽  
Candida Antarctica Lipase ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

This paper investigates the transesterification of methyl 3-mercaptopropionate (MP-SH) with tetraethylene glycol (TEG) and poly(ethylene glycol)s (PEG)s catalyzed by Candida antarctica Lipase B (CALB) without the use of solvent (in bulk). The progress of the reactions was monitored by 1H-NMR spectroscopy. We found that the reactions proceeded in a step-wise manner, first producing monothiols. TEG-monothiol was obtained in 15 min, while conversion to dithiol took 8 h. Monothiols from PEGs with Mn = 1000 and 2050 g/mol were obtained in 8 and 16 h, respectively. MALDI-ToF mass spectrometry verified the absence of dithiols. The synthesis of dithiols required additional fresh CALB and MP-SH. The structure of the products was confirmed by 1H-NMR and 13C-NMR spectroscopy. Enzyme catalysis was found to be a powerful tool to effectively synthesize thiol-functionalized TEGs and PEGs.

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