Helical silica nanotubes: Nanofabrication architecture, transfer of helix and chirality to silica nanotubes

• Published in: Chemical papers Vol. 65; no. 6; pp. 863 - 872
• Main Authors: Kim, Tae Kyu, Jeong, Euh Duck, Oh, Chae Young, Shin, Min Seob, Kim, Jong-Pil, Jung, Ok-Sang, Suh, Hongsuk, Khan, Fazlur Rahman Nawaz, Hyun, Myung Ho, Jin, Jong Sung
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Versita 01.12.2011; Versita
• Subjects: Biochemistry; Biotechnology; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; chirality; crossover experiments; handedness; Industrial Chemistry/Chemical Engineering; Materials Science; Medicinal Chemistry; organogels; Original Paper; silica nanomaterials; crossover experiments; organogels; chirality; silica nanomaterials; handedness
• ISSN: 0366-6352; 1336-9075; 1336-9075
• DOI: 10.2478/s11696-011-0083-5

A series of neutral gelators and cationic amphiphiles derived from 1,2 diphenylethylenediamine ( I ) and 1,2-cyclohexanediamine ( II ) was synthesised. Helical silica nanotubes were prepared utilising these organic gelators through sol-gel polycondensation of tetraethoxy silane, (TEOS-silica source). Right- and left-handed helical nanotubes respectively were obtained from a 1: 1 mass mixture of optically active, (1 S ,2 S )- III -(1 S ,2 S )- V neutral gelator and (1 S ,2 S )-IV-(1 S ,2 S )- VI cationic amphiphile and a 1: 1 mass mixture of optically active, (1 R ,2 R )- III -(1 R ,2 R )- V neutral gelator and (1 R ,2 R )- IV -(1 R ,2 R )- VI cationic amphiphile, indicating that the handedness of the helical nanotubes varied with the change in the neutral gelator precursors used. The nanotubes were characterised by SEM images.