Synthesis, characterization, and nonlinear optical properties of graphene oxide functionalized with tetra-amino porphyrin

Yamuna, R.; Ramakrishnan, S.; Dhara, Keerthy; Devi, Rekha; Kothurkar, Nikhil K.; Kirubha, E.; Palanisamy, P. K.

doi:10.1007/s11051-012-1399-y

Cited by 60 publications

(28 citation statements)

References 34 publications

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“…A typical example is the condensation reaction of 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (TAPP) with activated À CO 2 H groups from GO ( Figure 6). [77,139,140] Metalloporphyrins have also been grafted onto GBMs by amide bonds, namely for photocatalytic applications. For example, Kumar et al proposed the synthesis of an hybrid comprising amide bonds between GO and the Co(II) complex of TAPP (CoTAPP), as a photocatalyst for obtention of formic acid from carbon dioxide.…”

Section: Go/porphyrin Hybrids: Synthetic Strategies Characterizationmentioning

confidence: 99%

Functionalization of Graphene Oxide with Porphyrins: Synthetic Routes and Biological Applications

2020

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Among the available carbon nanomaterials, graphene oxide (GO) has been widely studied because of the possibility of anchoring different chemical species for a large number of applications, including those requiring water‐compatible systems. This Review summarizes the state‐of‐the‐art of synthetic routes used to functionalize GO, such as those involving multiple covalent and non‐covalent bonds to organic molecules, functionalization with nanoparticles and doping. As a recent development in this field, special focus is given to the formation of nanocomposites comprising GO and porphyrins, and their characterization through spectroscopic techniques (such as UV‐Vis, fluorescence, Raman spectroscopy), among others. The potential of such hybrid systems in targeted biological applications is also discussed, namely for cancer therapies relying on photodynamic and photothermal therapies and for the inhibition of telomerase enzyme. Lastly, some promising alternative materials to GO are presented to overcome current challenges of GO‐based research and to inspire future research directions in this field.

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Section: Go/porphyrin Hybrids: Synthetic Strategies Characterizationmentioning

confidence: 99%

Functionalization of Graphene Oxide with Porphyrins: Synthetic Routes and Biological Applications

2020

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“…It has been observed that the intensity of the nonlinear optics effect increases when porphyrin are covalently attached to GO with respect to the response of the porphyrin or GO independently . In this context, a symmetric tetra(aminophenyl)porphyrin has been covalently attached through peptide bonds to the carboxylic acid groups of GO (Scheme ) . Measurement of the nonlinear absorption coefficients (β) for GO, tetra(aminophenyl)porphyrin and the construct resulting of the covalent attachment of both moieties give values of 5.42×10 −4 , 9.83×10 −4 and 13.1×10 −4 cm W −1 , respectively.…”

Section: Nonlinear Optics With Covalent Functionalized Gmentioning

confidence: 99%

Covalently Modified Graphenes in Catalysis, Electrocatalysis and Photoresponsive Materials

Navalón

Herance

Álvaro

et al. 2017

Chemistry A European J

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The ideal graphene is a one-atom thick single layer of carbon atoms having sp hybridation in hexagonal arrangement. Due to their large surface area and good dispersability in common solvents, graphenes are suitable platforms to anchor covalently units. The appended unit can introduce additional functionality to graphene. Although the field of covalently modified graphene is still starting compared to the development of other carbon nanoforms, there is already many examples describing the use of modified graphenes as recoverable photo-, electrocatalysts as well as in non-linear optics and to improve mechanical resistance and solubility of graphenes. In this Review, the state of the art of covalently modified graphenes for these applications is reviewed. After some general sections describing properties and characterization techniques of graphenes relevant to their use as supports and those general reactions and starting substrates to obtain the modified graphene conjugates, the main body of the review describes the preparation and properties of covalently modified graphene depending on their use as catalyst, photocatalyst, photoresponsive material, non-linear optics, electrocatalyst and other uses. The last section of the review summarizes the main achievements of the field and what should be according to our view the future developments.

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“…32 This indicates the interaction between the electronic energy level of azo molecules and GO in the azo-GO hybrids. 29 Photoluminescence spectra of azo compounds (1a), (2a) and azo-GO hybrids (I) and (II) in DMF (excitation wavelength is 400 nm) are shown in figures 7 and 8. Emission spectra of these compounds show two peaks which is similar to the reported azo and azo-GO hybrids.…”

Section: Synthesis and Structure Of The Azo-go I And Ii Hybridsmentioning

confidence: 99%

“…This allows chemical functionalization of GO with variety of organic molecules, which will generate new materials with more interesting properties for further applications. 28,29 One major advantage of using GO is its bulk synthesis from natural graphite by chemical oxidation and subsequent exfoliation. The hydrophilic surface functional groups such as epoxide, hydroxyl, and carboxyl groups of GO makes it more water soluble and enables further chemical modification of graphene.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and photoluminescence properties of graphene oxide functionalized with azo molecules

et al. 2014

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Two different azo molecules functionalized graphene oxide (GO) through an ester linkage have been synthesized for the first time. Chemical structure of the azo-GO hybrids was confirmed by Fourier transform infrared spectroscopy and UV-visible spectroscopy. The GO functionalized with 5-((4methoxyphenyl)azo)-salicylaldehyde was further characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM). The SEM studies demonstrated that the morphology of the azo-GO hybrid was found to be similar to the GO sheets but slightly more wrinkled. Further, TEM image of azo-GO indicates some dark spots on the GO sheets due to azo functionalization. AFM results also reveal that the azo functionalization increases the thickness of GO sheet to 4-5 nm from 1.2-1.8 nm. Both the azo-hybrids show absorption band around 379 nm due to the π-π * transition of the trans azo units. Photoluminescence spectra of azo-GO hybrids show a strong quenching compared with azo molecules due to the photoinduced electron or energy transfer from the azo chromophore to the GO sheets. It also reveals strong electronic interaction between azo and GO sheets.

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Synthesis, characterization, and nonlinear optical properties of graphene oxide functionalized with tetra-amino porphyrin

Cited by 60 publications

References 34 publications

Functionalization of Graphene Oxide with Porphyrins: Synthetic Routes and Biological Applications

Functionalization of Graphene Oxide with Porphyrins: Synthetic Routes and Biological Applications

Covalently Modified Graphenes in Catalysis, Electrocatalysis and Photoresponsive Materials

Synthesis, characterization and photoluminescence properties of graphene oxide functionalized with azo molecules

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