Graphene oxide covalently functionalized with zinc phthalocyanine for broadband optical limiting

Zhu, Jinhui; Li, Yongxi; Chen, Yu; Wang, Jun; Zhang, Bin; Zhang, Jinjuan; Blau, Werner J.

doi:10.1016/j.carbon.2011.01.014

Cited by 255 publications

(132 citation statements)

References 25 publications

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“…Nonlinear optical (NLO) materials were investigated quite intensively in recent years due to their widespread applications in information storage, optical communication, optical switching, optical limiting, optical computing, logic devices, and image transmission [1] [2]. During past decades, organic materials have attracted great attention as NLO materials owing to their potential advantages over the classical inorganic materials in many aspects such as higher laser damage threshold, and flexible tailorability [3] [4].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Properties of Novel Polypyrrole Derivatives Bearing Different Aromatic Segments

Zhao¹,

Wang²,

Wang³

2017

MSA

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Polypyrrole (PPy) and its derivatives containing different aromatic segments were synthesized by the interfacial polymerization reaction using ammonium per sulfate as oxidant, and were characterized by using Fourier transform infrared, Ultraviolet/visible absorption, and Raman spectroscopic techniques. The third-order nonlinear optical properties of all samples were measured by using nanosecond Z-scan measurements at 532 nm. At the identical mass concentration of 0.15 mg•mL −1 , all PPy derivatives exhibited an obvious reverse saturable absorption performance, while the saturable absorption response was observed for PPy. In addition, significant differences in their nonlinear optical performances were observed, highlighting the influence on optical nonlinearity of the aromatic segments of conjugated polymers.

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Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Properties of Novel Polypyrrole Derivatives Bearing Different Aromatic Segments

Zhao¹,

Wang²,

Wang³

2017

MSA

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“…Such an approach is particularly useful to link photoand/or redoxactive chromophores 37 to graphene, and, thereby, adding light harvesting and electron transfer features. [38][39][40] To this date, a fairly large number of molecular building blocks, such as porphyrins, 27 porphycenes, 30 phthalocyanines, 31,41,42 perylenes, etc. have successfully been immobilized onto the basal plane of graphene.…”

Section: Introductionmentioning

confidence: 99%

Decorating graphene nanosheets with electron accepting pyridyl-phthalocyanines

et al. 2015

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We describe herein the preparation of novel exfoliated graphene-phthalocyanine nanohybrids, and the investigation of their photophysical properties. Pyridyl-phthalocyanines (Pcs) 1-3 are presented as novel electron accepting building blocks of variable strengths with great potential for the exfoliation of graphite via their immobilization onto the basal plane of graphene in dimethylformamide (DMF) affording single layered and turbostratic graphene based G1-G3. G1-G3 were fully characterized (AFM, TEM, Raman, steady-state and pump probe transient absorption spectroscopy) and were studied in terms of electron donor-acceptor interactions in the ground and excited states. In this context, electron transfer upon photoexcitation from graphene to the electron accepting Pcs with dynamics, for example, in G2 of <1 and 330 ± 50 ps for charge separation and charge recombination, respectively, was corroborated in a series of steady-state and time-resolved spectroscopy experiments.

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“…It is worth noting that in addition to the fluorescence quenching of Pc, as a result of π-π stacking with graphene oxide, Zhu et al demonstrated that chemical conjugation of nonprotected Pc to graphene oxide also decreases its fluorescence intensity, due to the electron transfer process from the Pc to the graphene oxide. 28 As a PTT agent, we employed novel LOGr nanosheets, fabricated via simple unique microwave preparation, as reported earlier by our team. 29 In contrast to graphene oxide, which is widely used for biomedical applications, LOGr nanosheets have 40-fold stronger light absorption, low density of oxygen-containing groups (similar to reduced graphene oxide), and larger ordered crystallite graphitic domains, of ≈6.7 nm.…”

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Phthalocyanine-loaded graphene nanoplatform for imaging-guided combinatorial phototherapy

Taratula¹,

Taratula²,

Patel³

et al. 2015

IJN

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We report a novel cancer-targeted nanomedicine platform for imaging and prospect for future treatment of unresected ovarian cancer tumors by intraoperative multimodal phototherapy. To develop the required theranostic system, novel low-oxygen graphene nanosheets were chemically modified with polypropylenimine dendrimers loaded with phthalocyanine (Pc) as a photosensitizer. Such a molecular design prevents fluorescence quenching of the Pc by graphene nanosheets, providing the possibility of fluorescence imaging. Furthermore, the developed nanoplatform was conjugated with poly(ethylene glycol), to improve biocompatibility, and with luteinizing hormone-releasing hormone (LHRH) peptide, for tumor-targeted delivery. Notably, a low-power near-infrared (NIR) irradiation of single wavelength was used for both heat generation by the graphene nanosheets (photothermal therapy [PTT]) and for reactive oxygen species (ROS)-production by Pc (photodynamic therapy [PDT]). The combinatorial phototherapy resulted in an enhanced destruction of ovarian cancer cells, with a killing efficacy of 90%–95% at low Pc and low-oxygen graphene dosages, presumably conferring cytotoxicity to the synergistic effects of generated ROS and mild hyperthermia. An animal study confirmed that Pc loaded into the nanoplatform can be employed as a NIR fluorescence agent for imaging-guided drug delivery. Hence, the newly developed Pc-graphene nanoplatform has the significant potential as an effective NIR theranostic probe for imaging and combinatorial phototherapy.

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Graphene oxide covalently functionalized with zinc phthalocyanine for broadband optical limiting

Cited by 255 publications

References 25 publications

Nonlinear Optical Properties of Novel Polypyrrole Derivatives Bearing Different Aromatic Segments

Nonlinear Optical Properties of Novel Polypyrrole Derivatives Bearing Different Aromatic Segments

Decorating graphene nanosheets with electron accepting pyridyl-phthalocyanines

Phthalocyanine-loaded graphene nanoplatform for imaging-guided combinatorial phototherapy

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Graphene oxide covalently functionalized with zinc phthalocyanine for broadband optical limiting

Cited by 255 publications

References 25 publications

Nonlinear Optical Properties of Novel Polypyrrole Derivatives Bearing Different Aromatic Segments

Nonlinear Optical Properties of Novel Polypyrrole Derivatives Bearing Different Aromatic Segments

Decorating graphene nanosheets with electron accepting pyridyl-phthalocyanines

Phthalocyanine-loaded graphene nanoplatform for&nbsp;imaging-guided combinatorial phototherapy

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Product

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Phthalocyanine-loaded graphene nanoplatform for imaging-guided combinatorial phototherapy