Remarkable thermal stability of gold nanoparticles functionalised with ruthenium phthalocyanine complexes

King, Shirin R.; Shimmon, Susan; Gentle, Angus; Westerhausen, Mika T.; Dowd, Annette; McDonagh, Andrew M.

doi:10.1088/0957-4484/27/21/215702

Cited by 14 publications

(21 citation statements)

References 30 publications

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“…a This compound was tested in our previous work. 24 The stabilizing compounds used in this study are listed in Table 1, and the molecular structures of the less well-known compounds are shown in Figure 1. These compounds were chosen based on their thermal stability (discussed in detail below) and their solubility in the solvents used to dissolve the AuNPs.…”

Section: Resultsmentioning

confidence: 99%

“…Resistance measurements were performed using a method reported previously. 24 Briefly, substrates were prepared by coating two gold electrodes onto pieces of thermal oxide-coated silicon wafer. Each sample was dispersed in the minimum amount of chloroform or dry tetrahydrofuran (THF) and then deposited using a fine-tipped glass pipette onto a substrate, such that a continuous film of the sample spanned the two electrodes once the solvent had cast from THF onto silicon substrates.…”

Section: Electrical Resistance Measurementsmentioning

confidence: 99%

“…Recently, we reported the synthesis of a nanocomposite consisting of AuNPs functionalized with a thiolated ruthenium phthalocyanine (RuPc) complex, which showed a surprisingly high thermal stability and resisted sintering up to ~320 C. 24 The RuPc complex serves as a robust physical barrier between the AuNPs, preventing sintering until the nanocomposite is heated to the decomposition temperature of the RuPc complex. However, recent work that investigated the stability of the Au-S bond in thiolate-stabilized gold clusters found that the Au-S bond was vulnerable to decomposition at temperatures as low as 150 C and that the aryl-or alkylthiolate stabilizers were almost completely removed at 250 C.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Bound versus Non-Bound Stabilizing Molecules on the Thermal Stability of Gold Nanoparticles

et al. 2017

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Knowledge concerning the sintering behavior of gold nanoparticles (AuNPs) allows for improved nanomaterials for applications such as printed electronics, catalysis and sensing. In this study, we examined the ability of a range of compounds to stabilize AuNPs against thermal sintering and compared compounds with and without functional groups that anchor the molecules to the nanoparticle surface. Thermal stability was characterized in terms of the temperature of the sintering event (TSE) as well as thermogravimetric analysis and scanning electron microscopy. We show that anchored stabilizing compounds with high thermal stability are effective at preventing the sintering of AuNPs until the decomposition of the compound. A TSE of 390 °C was achieved using 1pyrenebutanethiol as stabilizer. Of the unanchored stabilizers, which were combined with butanethiol-capped AuNPs, two were found to be particularly effective: oleylamine (TSE ≈ 300 °C) and a perylenedicarboximide derivative (TSE ≈ 540 °C), the latter conferring an unprecedented level of thermal stability on ligand-stabilized AuNPs. When selecting stabilizers without anchoring groups, our results demonstrate the importance of choosing those that have an affinity with the capping ligands on the AuNPs to ensure a uniform mixture of AuNPs and stabilizer within a film.

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Section: Resultsmentioning

confidence: 99%

Section: Electrical Resistance Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Bound versus Non-Bound Stabilizing Molecules on the Thermal Stability of Gold Nanoparticles

et al. 2017

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“…Their characteristic B1 and B2 bands (3)(4)(5)(6)(7)(8)(9)(10) were observed at a range of 313-405 nm (Fig. 1).…”

Section: Syntheses and Characterizationmentioning

confidence: 95%

“…Because of their potential contribution to the next generation of molecular electronic devices such as electrochromic and electro-luminescent displays, nonlinear optics, photovoltaics, chemical sensors nanotechnology, and photosensitizers for photodynamic cancer therapy (PDT) of tumors, studies on the synthesis and characterization of novel phthalocyanines (Pcs) compounds are of considerable interest [1][2][3][4][5][6][7][8][9][10][11]. All the properties of Pcs are influenced and enhanced both by the nature of central metals and the substituent and substituent's position (peripheral or non-peripheral) in the Pc ring.…”

Section: Introductionmentioning

confidence: 99%

Toluene vapor sensing characteristics of novel copper(II), indium(III), mono-lutetium(III) and tin(IV) phthalocyanines substituted with 2,6-dimethoxyphenoxy bioactive moieties

Pişkin

Can

Odabaş

et al. 2018

J. Porphyrins Phthalocyanines

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This study presents the synthesis, characterization and toluene sensing properties of copper(II), indium(III) acetate, mono-lutetium(III) acetate and tin(IV) phthalocyanines substituted with 2,6-dimethoxyphenol bioactive groups at the peripheral and non-peripheral positions. The effects of the substituent's position on the toluene vapor detection capabilities of these compounds were investigated. Adsorption data were analyzed by using first-order and Elovich equations in order to investigate the adsorption kinetics. It was found that the kinetics of the toluene adsorption strongly depends on the position of the substituent groups. Our results showed that the Elovich equation fits the experimental data well for non-peripherally substituted Pc based sensors, while the pseudo first-order model best describes the adsorption data for peripheral substituted Pc based sensors. Some physical, photophysical and photochemical of 2,6-dimethoxyphenoxy substituted metal-free and metallophthalocyanines (indium(III) and zinc(II) Pcs) were investigated by our group [26]. We wondered how copper(II), indium(III), mono-lutetium(III) and tin(IV) Pcs substituted with 2,6-dimethoxyphenoxy bioactive moieties affect the physical, electronic and toluene sensing properties. Hence, highly soluble peripherally and non-peripherally substituted Cu(II), In(III), Lu(III) and Sn(IV) Pcs with 2,6-dimethoxyphenoxy were also synthesized (Scheme 1), and the effects of the position of the substituents and the variety of central metal ions on the their spectroscopic and toluene vapors sensing properties were investigated in this study. KEYWORDS EXPERIMENTAL Materials and Equipment2,6-Dimethoxy-phenoxy substituted phthalonitriles (1 and 2) were obtained by the reaction of 2,6-dimethoxy phenol with 3-nitrophthalonitrile or 4-nitrophthalonitrile through base catalyzed nucleophilic aromatic displacement reaction [26]. All other starting materials and solvents used were obtained commercially. All reactions were carried out under dry nitrogen atmosphere. The novel Pcs (3-10) were successively cleaned by washing with hot acetic acid-water solution by volume 7/3, water, ethanol and acetonitrile in the Soxhlet apparatus. Column chromatography was performed on silica gel 60 for a proper purification of the raw compounds. The purity of the products was tested in each step by thin layer chromotography (Silicagel F-254 coated TLC plate). Melting points of the Pc compounds were found to be higher than 300 °C. IR Spectra and electronic spectra were recorded on a Shimadzu FTIR-8300 (ATR) and a Shimadzu UV-1601 spectrophotometer, respectively. Elemental analyses were performed by the Instrumental Analysis Laboratory of TUBITAK-Ankara. Mass spectra were acquired on a Microflex III MALDI-TOF mass spectrometer (Bruker Daltonics, Germany) equipped with a nitrogen UV-Laser operating at 337 nm in reflectron mode with an average of 50 shots. SynthesisGeneral procedure for the synthesis of metallophth alocyanines (3-10).

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Photoconductive control of high-order localized surface plasmon modes in Au-Si-Au nanodisk stacking

Nooshnab

Large

2023

J Nanopart Res

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Remarkable thermal stability of gold nanoparticles functionalised with ruthenium phthalocyanine complexes

Cited by 14 publications

References 30 publications

Influence of Bound versus Non-Bound Stabilizing Molecules on the Thermal Stability of Gold Nanoparticles

Influence of Bound versus Non-Bound Stabilizing Molecules on the Thermal Stability of Gold Nanoparticles

Toluene vapor sensing characteristics of novel copper(II), indium(III), mono-lutetium(III) and tin(IV) phthalocyanines substituted with 2,6-dimethoxyphenoxy bioactive moieties

Photoconductive control of high-order localized surface plasmon modes in Au-Si-Au nanodisk stacking

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