دورية أكاديمية
Silica Biomineralization with Lignin Involves Si-O-C Bonds That Stabilize Radicals.
| العنوان: | Silica Biomineralization with Lignin Involves Si-O-C Bonds That Stabilize Radicals. |
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| المؤلفون: | Palakurthy S; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Hebrew University of Jerusalem, 7610001 Rehovot, Israel., Houben L; The Weizmann Institute of Science, 7610001 Rehovot, Israel., Elbaum M; The Weizmann Institute of Science, 7610001 Rehovot, Israel., Elbaum R; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Hebrew University of Jerusalem, 7610001 Rehovot, Israel. |
| المصدر: | Biomacromolecules [Biomacromolecules] 2024 Jun 10; Vol. 25 (6), pp. 3409-3419. Date of Electronic Publication: 2024 May 07. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 100892849 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1526-4602 (Electronic) Linking ISSN: 15257797 NLM ISO Abbreviation: Biomacromolecules Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Washington, DC : American Chemical Society, c2000- |
| مواضيع طبية MeSH: | Lignin*/chemistry , Silicon Dioxide*/chemistry, Biomineralization ; Silicic Acid/chemistry ; Silicon/chemistry |
| مستخلص: | Plants undergo substantial biomineralization of silicon, which is deposited primarily in cell walls as amorphous silica. The mineral formation could be moderated by the structure and chemistry of lignin, a polyphenol polymer that is a major constituent of the secondary cell wall. However, the reactions between lignin and silica have not yet been well elucidated. Here, we investigate silica deposition onto a lignin model compound. Polyphenyl propanoid was synthesized from coniferyl alcohol by oxidative coupling with peroxidase in the presence of acidic tetramethyl orthosilicate, a silicic acid precursor. Raman, Fourier transform infrared, and X-ray photoelectron spectroscopies detected changes in lignin formation in the presence of silicic acid. Bonds between the Si-O/Si-OH residues and phenoxyl radicals and lignin functional groups formed during the first 3 h of the reaction, while silica continued to form over 3 days. Thermal gravimetric analysis indicated that lignin yields increased in the presence of silicic acid, possibly via the stabilization of phenolic radicals. This, in turn, resulted in shorter stretches of the lignin polymer. Silica deposition initiated within a lignin matrix via the formation of covalent Si-O-C bonds. The silica nucleants grew into 2-5 nm particles, as observed via scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy. Additional silica precipitated into an extended gel. Collectively, our results demonstrate a reciprocal relation by which lignin polymerization catalyzes the formation of silica, and at the same time silicic acid enhances lignin polymerization and yield. |
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| المشرفين على المادة: | 9005-53-2 (Lignin) 7631-86-9 (Silicon Dioxide) 1343-98-2 (Silicic Acid) Z4152N8IUI (Silicon) |
| تواريخ الأحداث: | Date Created: 20240507 Date Completed: 20240610 Latest Revision: 20240615 |
| رمز التحديث: | 20240615 |
| مُعرف محوري في PubMed: | PMC11170934 |
| DOI: | 10.1021/acs.biomac.4c00061 |
| PMID: | 38713166 |
| قاعدة البيانات: | MEDLINE |
Find this issue from the American Chemical Society | تدمد: | 1526-4602 |
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| DOI: | 10.1021/acs.biomac.4c00061 |