Reversibly Thermochromic Cyclic Dipeptide Nanotubes
- Authors
- Seo, Min Jeong; Song, Jisoo; Kantha, Chandra; Khazi, Mohammed Iqbal; Kundapur, Umesha; Heo, Jung-Moo; Kim, Jong-Man
- Issue Date
- Jul-2018
- Publisher
- AMER CHEMICAL SOC
- Citation
- LANGMUIR, v.34, no.28, pp.8365 - 8373
- Indexed
- SCIE
SCOPUS
- Journal Title
- LANGMUIR
- Volume
- 34
- Number
- 28
- Start Page
- 8365
- End Page
- 8373
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/149755
- DOI
- 10.1021/acs.langmuir.8b00743
- ISSN
- 0743-7463
- Abstract
- Owing to their capability of forming extensive hydrogen bondings and the facile introduction of chirality, cyclic dipeptides (CDPs) have gained great attention as scaffolds for functional supramolecules. Surprisingly, introduction of a photopolymerizable diacetylene (DA) moiety to the CDP afforded nanotubular structures with enhanced stability and reversible thermochromism. A series of CDP-containing DAs (CDP-DAs) are prepared by coupling 10,12-pentacosadiynoic acid with CDPs, cyclo(-Gly-Ser) and cis/trans cyclo(-Ser-Ser). Fabrication of CDP-DA self-assemblies in a polar chloroform and methanol solvent mixture affords nanotubes comprising single-wall and multiwall structures. The self-assembly behavior and morphology characteristic are examined by scanning electron microscopy and transmission electron microscopy. Next, X-ray diffraction analysis confirms well-ordered lamellar structures with a perfect agreement with the bilayer formation leading to the tubular structure via lamellar scrolling behavior. Upon UV irradiation, monomeric CDP-DA tubular assemblies result in the blue-colored CDP/polydiacetylene (PDA) nanotubes. Interestingly, CDP/PDA nanotubes exhibit a reversible blue-to-red change for over 10 consecutive thermal cycles. The CDP-DA/PDA supramolecular system demonstrates potential applications in developing stimulus-responsive functional materials.
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