Photopolymerization of acrylamide induced by colloidal graphene oxide

Andryushina, N. S.; Stroyuk, A. L.; Dudarenko, Galyna V.; Kuchmiy, Stepan Ya.; Pokhodenko, V. D.

doi:10.1016/j.jphotochem.2013.02.009

Cited by 24 publications

(34 citation statements)

References 36 publications

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“…Discernible π-π* and n-π* transitions are also present in its UV absorption (200-320 nm) and arise from the presence of oxygen-containing functionalities [23,24]. GO's optical response is thus exquisitely sensitive to its degree of oxidation [25]. As an illustration, the last two panels in Fig.…”

Section: Optical Properties Of Graphene Go and Rgomentioning

confidence: 99%

“…A handful of studies have implicated photolysis as an alternate, light-induced means of reducing GO [25,49,58]. In a photolytic mechanism, light is absorbed by a molecular resonance associated with an oxygen-containing functionality.…”

Section: Go Photolysismentioning

confidence: 99%

“…The absorbed energy then dissipates through radiative or non-radiative channels or initiates a change in the chemical bond associated with the functionality. For GO, such changes include functional group migration and/or dissociation with theoretical activation energies (E a ) ranging from 0.28 to >1 eV [25,[58][59][60][61].…”

Section: Go Photolysismentioning

confidence: 99%

“…Associated activation energies are 0.7 eV for OH [59], 1.9-2.1 eV for C-O-C [59,62], and 3-4 eV for C=O and COOH groups [25,58,60]. Additional, more complicated, light-induced chemistries are also possible wherein multiple functional groups (primarily hydroxyls) interact to evolve H 2 O (E a~0 .28-0.46 eV) [61].…”

Section: Go Photolysismentioning

confidence: 99%

“…In this case, hydroxyls (migration E a~0 .32 eV) and epoxides (migration E a~0 .9 eV) hop from carbon to carbon, leaving behind sp 2 hybridized carbons in their wake [61]. These groups eventually localize at defects/edges and subsequently dissociate through identical multiple functional group chemistries outlined above [25,61].…”

Section: Go Photolysismentioning

confidence: 99%

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Spectroscopy and Microscopy of Graphene Oxide and Reduced Graphene Oxide

et al. 2015

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Graphene oxide (GO) is an important material that provides a scalable approach for obtaining chemically derived graphene. Its optical and electrical properties are largely determined by the presence of oxygen-containing functionalities, which decorate its basal plane. This chemical derivatization results in useful properties such as the existence of a band gap as well as emission spanning both the visible and near infrared. Notably, GO's optical and electrical properties can be altered through reduction, which proceeds through the removal of these oxygen-containing functional groups. However, widely variable behavior has been observed regarding the evolution of GO's optical response during reduction. These discrepancies arise from the different reduction methods being used and, in part, from the fact that nearly all prior measurements have been ensemble studies. Consequently, detailed mechanistic studies of GO reduction are needed which can transcend the limitations of ensemble averaging.In this chapter, we show the spectroscopic evolution of GO's optical properties during photoreduction at the single-sheet level. Laser-induced reduction, in particular, offers a unique and potentially controllable method for producing reduced GO (rGO), a material with properties similar to those of graphene. However, given the complexity of GO's photoreduction mechanism, microscopic monitoring of the process is essential to understanding and ultimately exploiting this approach.

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Section: Optical Properties Of Graphene Go and Rgomentioning

confidence: 99%

Section: Go Photolysismentioning

confidence: 99%

Section: Go Photolysismentioning

confidence: 99%

Section: Go Photolysismentioning

confidence: 99%

Section: Go Photolysismentioning

confidence: 99%

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Spectroscopy and Microscopy of Graphene Oxide and Reduced Graphene Oxide

et al. 2015

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Polymerization Induced by Light

Lalevée

Fouassier

2022

Macromolecular Engineering

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The present article presents an overview of photopolymerization reactions and is focused on photoinitiators, photosensitizers, radical and cationic monomers and oligomers, the film photopolymerization of acrylates, epoxides, vinyl ethers, thiol–enes, waterborne light‐curable systems, UV powder formulations, charge‐transfer monomers, dual cure and hybrid cure systems, the general functional properties of the cured materials, the applications, etc. The kinetics, the monitoring of the photopolymerization, the investigation of the excited state processes, the access to the rate constants of the chemical reactions, the solution and bulk reactivity, and the photochemical and chemical reactivity are also discussed.

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Photoinitiators for Novel Specific Properties

2021

Photoinitiators

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Photopolymerization of acrylamide induced by colloidal graphene oxide

Cited by 24 publications

References 36 publications

Spectroscopy and Microscopy of Graphene Oxide and Reduced Graphene Oxide

Spectroscopy and Microscopy of Graphene Oxide and Reduced Graphene Oxide

Polymerization Induced by Light

Photoinitiators for Novel Specific Properties

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