Synthesis of bent-shaped azobenzene main-chain polymers for photo-switching properties Article Swipe
Md Lutfor Rahman
,
Tang Xin Ting
,
Mohd Sani Sarjadi
,
Sazmal Effendi Arshad
,
Sabrina Soloi
,
Zuhair Jamain
,
Mohd Hafiz Abd Majid
,
Gurumurthy Hedge
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1080/10601325.2023.2287033
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1080/10601325.2023.2287033
This work presents the synthesis of the new bent-core polymers with siloxane units connected to the one side of azobenzene units. The structure of siloxane-based azobenzene bent-core polymers, 7a–c, was elucidated by spectral analysis (nuclear magnetic resonance and Fourier-transform infrared spectroscopy). The results of gel permeation chromatography suggested that all polymers (7a–c) showed polydisperse (polydispersity index >1). Besides, the extent of polymerization in the following order: 7a > 7b > 7c, where the degree of polymerization values were 7, 8 and 11, respectively. Polarizing optical microscopy revealed that the bent-core liquid crystal (BCLC) monomers, 6a and 6b, displayed the smectic A phase, whereas BCLC monomer 6c and all siloxane-based main-chain polymers (MCPs) (7a–c) were crystalline in nature. The result of ultraviolet-visible spectroscopy demonstrated that all MCPs (7a–c) exhibited strong photoisomerization behavior in solution. All polymers (7a–c) showed trans to cis isomerization in about 200 s, whereas the reverse process required much longer times ranging from 400 to 520 min in solution. The photo-switching study on azobenzene containing polymers stated that the effect of alkyl chain length and type of central core units on trans to cis isomerization were negligible. In contrast, both parameters influence the cis to trans process in which the photo-switching behavior of these materials may be primarily suitably exploited in the field of photo-induced phenomenon. Time dependence photoisomerization curve of a) trans isomer (7a–c) showing the effect of UV illumination at 365 nm wavelength, which take time for trans to cis isomerization in about 200s, and b) cis isomer (7a–c) showing the thermal back relaxation time, the reverse process required much longer times ranging from 400–520 min in solution
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1080/10601325.2023.2287033
- OA Status
- green
- Cited By
- 6
- References
- 37
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4389347684
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4389347684Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1080/10601325.2023.2287033Digital Object Identifier
- Title
-
Synthesis of bent-shaped azobenzene main-chain polymers for photo-switching propertiesWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2023Year of publication
- Publication date
-
2023-12-05Full publication date if available
- Authors
-
Md Lutfor Rahman, Tang Xin Ting, Mohd Sani Sarjadi, Sazmal Effendi Arshad, Sabrina Soloi, Zuhair Jamain, Mohd Hafiz Abd Majid, Gurumurthy HedgeList of authors in order
- Landing page
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https://doi.org/10.1080/10601325.2023.2287033Publisher landing page
- Open access
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YesWhether a free full text is available
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greenOpen access status per OpenAlex
- OA URL
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https://figshare.com/articles/journal_contribution/Synthesis_of_bent-shaped_azobenzene_main-chain_polymers_for_photo-switching_properties/24745696Direct OA link when available
- Concepts
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Photoisomerization, Azobenzene, Polymer, Materials science, Siloxane, Polymerization, Isomerization, Monomer, Dispersity, Side chain, Polymer chemistry, Fourier transform infrared spectroscopy, Photochemistry, Chemistry, Chemical engineering, Organic chemistry, Composite material, Engineering, CatalysisTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
6Total citation count in OpenAlex
- Citations by year (recent)
-
2025: 5, 2024: 1Per-year citation counts (last 5 years)
- References (count)
-
37Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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