Co-solvent polarity tuned thermochromic nanotubes of cyclic dipeptide-polydiacetylene supramolecular systemopen access
- Authors
- Khazi, Mohammed Iqbal; Balachandra, Chenikkayala; Shin, Geon; Jang, Gang-Hee; Govindaraju, Thimmaiah; Kim, Jong-Man
- Issue Date
- Sep-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.10, no.58, pp.35389 - 35396
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 10
- Number
- 58
- Start Page
- 35389
- End Page
- 35396
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/32756
- DOI
- 10.1039/d0ra05656a
- ISSN
- 2046-2069
- Abstract
- The cooperative non-covalent interactions arising from structurally integrated multiple molecules have emerged as a powerful tool for the creation of functional supramolecular structures. Herein, we constructed cyclic dipeptide (CDP)-polydiacetylene (PDA) conjugate (CDP-DA) by introducing cyclo(l-Phe-l-Lys) to the linear 10,12-pentacosadiynoic acid. Owing to extensive hydrogen bonding characteristics, together with structural chirality of cyclo(l-Phe-l-Lys) and strong pi-pi stacking diacetylenic template, CDP-DA generated supramolecular nanotubes. The structural visualization using scanning and transmission electron microscopy revealed chloroform/methanol co-solvent polarity tuned morphological transformation of intrinsic lamellar assemblies into nanotubes comprising single-wall and multi-wall structure. The mechanistic understanding by X-ray diffraction patterns confirms bilayer organization in lamellar structure, which forms nanotubesviaa gradual lamellar curling-to-scrolling process. The supramolecular CDP-DA nanotubes are transformed into the rigid covalently cross-linked blue-phase polydiacetylene (CDP-PDA) by UV irradiation. Very interestingly, the blue-phase nanotubes display reversible thermochromic changing temperature up to 150 degrees C with excellent repeatability over a dozen thermal cycles. This work provides an efficient strategy for precise morphological control and aiding the perspective for development in nanostructures for functional devices.
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