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Graphene and Flavin Mononucleotide Interaction in Aqueous Graphene Dispersions
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics. RISE Res Inst Sweden, Div Biosci & Mat, SE-11486 Stockholm, Sweden.
RISE Res Inst Sweden, Div Biosci & Mat, SE-11486 Stockholm, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.ORCID iD: 0000-0003-0244-8565
RISE Res Inst Sweden, Div Biosci & Mat, SE-11486 Stockholm, Sweden.
2019 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 123, no 43, p. 26282-26288Article in journal (Refereed) Published
Abstract [en]

A fundamental understanding of the interaction between graphene and a stabilizer is needed for the development of stable aqueous graphene dispersions. Here, we studied the interaction of graphene with the flavin mononucleotide (FMN) in water. The UV-vis absorption spectra revealed blue shifts of the FMN absorption bands II (374 nm) and I (445 nm) in the presence of graphene. Furthermore, Fourier transform infrared analysis showed that the graphene also upshifted the FMN vibration modes C-10a=N-1 and C-4a=N-5, which correspond to the FMN isoalloxazine binding sites N(1) and N(5), respectively. In addition, thermogravimetric analysis showed that the thermal stability of graphene was enhanced by the adsorbed FMN, which supports the strong interaction. These results confirm that FMN adsorbs on the graphene surface in parallel conformation and hinders hydrogen bonding at the FMN isoalloxazine binding sites.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2019. Vol. 123, no 43, p. 26282-26288
National Category
Physical Chemistry Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-397785DOI: 10.1021/acs.jpcc.9b06442ISI: 000493865700027OAI: oai:DiVA.org:uu-397785DiVA, id: diva2:1374255
Funder
Swedish Foundation for Strategic Research , FID-15-0105Available from: 2019-11-29 Created: 2019-11-29 Last updated: 2020-01-08Bibliographically approved

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Zhao, WeiZhang, Zhi-Bin

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