| Title: | Sustainable in-water synthesis of aliphatic porous polyazines : a versatile platform for conjugated aerogels, polyHIPEs, or carbon foams |
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| Authors: | ID Kotnik, Tomaž (Author)
ID Žerjav, Gregor (Author)
ID Novak, Zoran (Author)
ID Pintar, Albin (Author)
ID Kovačič, Sebastijan (Author) |
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| Files: |  Kotnik-2023-Sustainable_In-Water_Synthesis_of.pdf (11,24 MB)
MD5: 26163DA5CB0951C61D64055994DD5D8D
 https://doi.org/10.1021/acs.macromol.3c00437
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | Access to conjugated porous polymers via synthetically sustainable and straightforward routes is highly desirable, as many polymer systems exhibit high performance but require arduous synthetic protocols that rarely pave the way to commercial reality. In this article, we describe an easily fabricated series of novel highly porous poly(Schiff bases) that feature an aliphatic conjugated backbone obtained with low synthetic complexity from simple reagents such as glyoxal and hydrazine monohydrate in water. The effective synthesis enables the preparation of three different functional scaffolds, i.e., aerogels, polyHIPEs (polymerized HIPEs), and even carbon foams from aliphatic poly(azine) (PAZ) networks. The reported synthetic approach is compared to the literature using ″green chemistry metrics″, such as the E-factor and synthetic complexity (SC) index, and shows dramatic improvements. An E-factor of up to 0.27 for aerogels or 80 for polyHIPEs and an SC index of 2.7 are much lower than those for poly(arylene)-based conjugated analogues, indicating good scalability, sustainability, and low cost. PAZ materials feature impressive red/near IR-shifted optical absorption band edges, with an electrochemical band gap of 1.45 eV. Aliphatic PAZ scaffolds are characterized by high flexibility compared to aromatic analogues and do not fail at compressive loads of up to 70%. Finally, carbonization at 500 °C leads to highly porous carbonaceous scaffolds with a high N content of up to 29 wt % (21 mmol of nitrogen per gram carbon material). |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 09.03.2023 |
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| Publication date: | 07.07.2023 |
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| Publisher: | American Chemical Society |
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| Year of publishing: | 2023 |
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| Number of pages: | Str. 5642–5650 |
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| Numbering: | Letn. 56, Št. 14 |
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| PID: | 20.500.12556/DKUM-87371  |
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| UDC: | 54 |
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| ISSN on article: | 1520-5835 |
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| COBISS.SI-ID: | 159388419 |
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| DOI: | 10.1021/acs.macromol.3c00437 |
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| Publication date in DKUM: | 13.03.2024 |
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| Views: | 879 |
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| Downloads: | 49 |
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| Metadata: |    |
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| Categories: | Misc.
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