Alkynyl Ethers of Glucans: Substituent Distribution in Propargyl-, Pentynyl- and Hexynyldextrans and -amyloses and Support for Silver Nanoparticle Formation

作者：Tahir M Nazir; Bork Christian; Ri**erg Anna; Horst Jennifer C; Komoss Christina; Vollmer Antje; Mischnick Petra^*

来源：Macromolecular Chemistry and Physics, 2010, 211(15): 1648-1662.

DOI：10.1002/macp.200900700

• alkynyldextrans
• biopolymers
• metal complexation
• nanoparticles
• substituent distribution

Alkynyldextrans with a DS in the range 0.1-1.67 have been prepared as reactive intermediates for further polymer-analogous functionalisation.. DS and substituent distribution were determined by GLC and GLCMS after hydrolysis and acetylation, or methanolysis and trimethylsilylation. Reactivity was in the order O-2 > O-4 >= O-3 with pronounced differences in the distinct patterns for propargyl ethers and its higher homologous. A large deviation from a random substituent distribution was observed. Propargyldextrans were not stable during long-time storage in the solid state, while terminal pentynyl and hexynyl ethers are. Pentynyldextrans showed structure formation of various geometries. They bound silver efficiently, yielding silver nanoparticles by reduction.

• 出版日期2010-8-2