کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1243814 1495787 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Graphene oxide vs. reduced graphene oxide as carbon support in porphyrin peroxidase biomimetic nanomaterials
ترجمه فارسی عنوان
اکسید گرافن در مقابل کاهش اکسید گرافین به عنوان کربن در نانومواد بیومیفیک پورفیرین پراکسیداز
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• GO-supported iron porphyrins are better peroxidase mimics compared to TRGO.
• The enhanced catalytic activity was achieved with small amounts of porphyrin.
• GO-ironporphyrin composite is a good candidate for chemical detection of vitamin E.

The paper describes the preparation of supramolecular assemblies of tetrapyridylporphyrin (TPyP) and its metallic complexes with graphene oxide (GO) and thermally reduced graphene oxide (TRGO). The two carbon supports are introducing different characteristics in the absorption spectra of the investigated nanocomposites. Raman spectroscopy shows that the absorption of iron-tetrapyridylporphyrin is more efficient on GO than TRGO, suggesting that oxygen functionalities are involved in the non-covalent interaction between the iron-porphyrin and graphene. The biomimetic peroxidase activity is investigated and the two iron-containing composites exhibit a better catalytic activity than each component of the assembly, and their cobalt and manganese homologues, respectively. The main advantages of this work include the demonstration of graphene oxide as a very good support for graphene-based nanomaterials with peroxidase-like activity (KM=0.292 mM), the catalytic activity being observed even with very small amounts of porphyrins (the TPyP:graphene ratio=1:50). Its potential application in the detection of lipophilic antioxidants (vitamin E can be measured in the 10−5–10−4 M range) is also shown.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 148, 1 February 2016, Pages 511–517
نویسندگان
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