Mixtures of diblock co-oligomers of tri-
O-methylated and unmodified cello-oligosaccharides have been found to be amphiphilic, as reported before. In order to clarify
their accurate amphiphilic property, diblock co-oligomers of tri-
O-methylated and unmodified cello-oligosaccharides with monodispersity, methyl β-
d-glucopyranosyl-(1→4)-2,3,6–tri-
O-methyl-β-
d-glucopyranosyl-(1→4)-2,3,6–tri-
O-methyl-β-
d-glucopyranosyl-(1→4)-2,3,6-tri-
O-methyl-β-
d-glucopyranosyl-(1→4)-2,3,6-tri-
O-methyl-
d-glucopyranoside (
1, pentamer), methyl β-
d-glucopyranosyl-(1→4)- β-
d-glucopyranosyl-(1→4)-2,3,6-tri-
O-methyl-β-
d-glucopyranosyl-(1→4)-2,3,6-tri-
O-methyl-β-
d-glucopyranosyl-(1→4)-2,3,6-tri-
O-methyl-β-
d-glucopyranosyl-(1→4)-2,3,6-tri-
O-methyl-
d-glucopyranoside (
2, hexamer), and methyl β-
d-glucopyranosyl-(1→4)-2,3,6-tri-
O-methyl-β-
d-glucopyranosyl-(1→4)- 2,3,6-tri-
O-methyl-
d-glucopyranoside (
3, trimer) were synthesized independently. These compounds had higher surface activities compared to the mixture of diblock
co-oligomers of tri-
O-methylated and unmodified cello-oligosaccharides and commercially available methylcellulose (MC) SM-4. This paper describes
the methods of synthesis of these compounds, and the influence of amphiphilic character on their surface activity. A new class
of carbohydrate-based nonionic surfactant without long alkyl chain was discovered.
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