Protonation-Induced Self-Assembly of Flexible Macrocyclic Diacetylene for Constructing Stimuli-Responsive Polydiacetylene
- Authors
- Shin, Geon; Khazi, Mohammed Iqbal; Kim, Jong-Man
- Issue Date
- Jan-2020
- Publisher
- AMER CHEMICAL SOC
- Citation
- MACROMOLECULES, v.53, no.1, pp.149 - 157
- Indexed
- SCIE
SCOPUS
- Journal Title
- MACROMOLECULES
- Volume
- 53
- Number
- 1
- Start Page
- 149
- End Page
- 157
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/11482
- DOI
- 10.1021/acs.macromol.9b02133
- ISSN
- 0024-9297
- Abstract
- The shape-persistent self-assembling characteristic of the macrocyclic structure has been extensively employed for creating columnar nanoarchitectures. The macrocyclic structure offers a definite structural confinement as well as conformational flexibility to the molecular frame and ensures the unidirectional self-assembly into hollow tubular channels. Upon introducing the judicious choice of functional groups, the macrocycle often functions as an adaptive receptor/host and accommodates structure-specific external guest within the predefined confined space. A new macrocycle, PMCDA, was constructed from a more flexible polymerizable diacetylene (DA) template by connecting with pyridine rings. Owing to the proton receptor nature of pyridine ring and pi-pi stacking characteristic of DA template, protonation-induced tubular structures are generated through the columnar assembly of PMCDA. Upon UV light irradiation, the monomeric PMCDA-H+ are transformed into the robust covalently cross-linked blue-phase polydiacetylene (PMCPDA-H+). Quite interestingly, the blue-phase PMCPDA-H+ displays multistimuli-responsive colorimetric sensory responses: reversible thermochromism, selective solvatochrom for dimethyl sulfoxide and dimethylformamide, and organic/inorganic base sensing. The chromatic changes of PMCPDA-H+ demonstrate potential applications in developing thermo-chemocolorimetric sensors.
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