Organic Nanotube with Subnanometer, pH-Responsive Lumen
- Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
- Northwestern Univ., Evanston, IL (United States). Dept. of Civel & Environmental Engineering and Mechanical Engineering
- Univ. of California, Berkeley, CA (United States). Depts. of Materials Science and Engineering & Chemistry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
While many synthetic nanotubes with a hydrophobic lumen and fast molecular transport have been developed, decorating the interior of these channels with polar and/or responsive functional groups remains challenging. In transmembrane proteins like the aquaporin and M2 channels, the presence of histidine residues in a mostly hydrophobic channel has led to enhanced selectivity and pH-based activation. In this paper, we report the synthesis of Bzim-CP, a cyclic octapeptide that contains a benzimidazole functionality as a chemical and structural mimic of histidine. Bzim-CP undergoes different protonation states, forms subnanometer nanotubes, and projects two different ionizable functionalities into the lumen. Present studies open up synthetic possibilities to functionalize subnanometer porous channels as a basis toward understanding new transport phenomena.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR)
- Grant/Contract Number:
- AC02-05CH11231; SC0001015; N00014-13-1-0760; CBET-1234305
- OSTI ID:
- 1634048
- Journal Information:
- Journal of the American Chemical Society, Vol. 141, Issue 28; ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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