Block Copolymer Nanotubes

✍ Scribed by Sean Stewart; Guojun Liu

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 154 KB
• Volume: 112
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/(sici)1521-3757(20000117)112:2<348::aid-ange348>3.0.co;2-b

✦ Synopsis

A sample (0.104 g) of the binary alloy ªKGe 4 º, prepared by hightemperature reactions of pure elements (Aldrich) within sealed Nb tubing, was dissolved in neat en (5 mL), forming a dark green solution. A separate solution of [18]crown-6 (0.048 g, 0.182 mmol) in neat toluene (4 mL ) was slowly added and layered on the alloy solution. Formation of transparent light blue-green rodlike crystals was observed after two weeks. The moisture-sensitive crystals were preserved in mother liquor and were found to be of compound 1 (yield 30 ± 40 %).