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Supramolecular Chemistry on Metal Nanoparticles
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Supramolecular Chemistry on Metal Nanoparticles

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Physical Chemistry and Chemical Physics".

Deadline for manuscript submissions: closed (15 June 2023) | Viewed by 8874

Special Issue Editor

Dr. Shinmori Hideyuki

E-Mail Website
Guest Editor
Graduate Faculty of Interdisciplinary Research, Faculty of Life and Environmental Sciences Life Agriculture System (Biotechnology), University of Yamanashi, Kofu 400-8510, Japan
Interests: metal nanoparticle; supramolecular chemistry; nanobiotechnology; biooraganic chemistry; self-assembly; porphyrin; reactive oxygen species; photosensitization; molecular machine

Special Issue Information

Dear Colleagues, 

Metal nanoparticles, such as gold and silver clusters, provide attractive surface properties and are now extensively utilized in materials science, analytical chemistry, biochemistry, and so on. The nanoparticles which are less than 100 nm have high surface area and specific crystal faces. Supramolecular chemistry, defined as the chemistry of non-covalent interactions, on the metal nanoparticles is interesting because of the different features in comparison with those on the bulk metal. Especially noble metal nanoparticles display localized surface plasmon resonances (LSPRs) that are dependent on their shape and size, and cover a broad spectral region from the visible and up to the near-IR wavelengths. Also, LSPRs, originated from the quantum confinement effect, are influenced by the surface molecules and/or environment of the metal nanoparticles. Consequently, the host-guest interaction and the assembling on the metal nanoparticles can be monitored by LSPRs signal changes.

This special issue aims to provide an overview of the current research on the promising functional metal nanoparticles utilizing supramolecular chemistry and their photochemical behavior for the applications to biological and material sciences, such as bioimaging, sensing, photo-therapy, optical device and catalyst. Fortunately, the field of nanotechnology of metal nanoparticles continues to grow interest within the chemical research community with new scientific challenges.

Dr. Shinmori Hideyuki
Guest Editor

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Keywords

  • assembly
  • host-guest chemistry
  • quantum confinement effects
  • nanostructure
  • gold nanoparticles
  • silver nanoparticles
  • noble metals
  • signaling
  • non-covalent bonds
  • surface chemistry
  • colloid chemistry

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Published Papers (4 papers)

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Research

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13 pages, 4318 KiB  
Article
Singlet Oxygen Generation Driven by Sulfide Ligand Exchange on Porphyrin–Gold Nanoparticle Conjugates
by Akira Shinohara and Hideyuki Shinmori
Int. J. Mol. Sci. 2023, 24(8), 7600; https://doi.org/10.3390/ijms24087600 - 20 Apr 2023
Viewed by 1481
Abstract
Here, we report a switching method of singlet oxygen (1O2) generation based on the adsorption/desorption of porphyrins to gold nanoparticles driven by sulfide (thiol or disulfide) compounds. The generation of 1O2 by photosensitization is effectively suppressed by [...] Read more.
Here, we report a switching method of singlet oxygen (1O2) generation based on the adsorption/desorption of porphyrins to gold nanoparticles driven by sulfide (thiol or disulfide) compounds. The generation of 1O2 by photosensitization is effectively suppressed by the gold nanoparticles and can be restored by a sulfide ligand exchange reaction. The on/off ratio of 1O2 quantum yield (ΦΔ) reached 7.4. By examining various incoming sulfide compounds, it was found that the ligand exchange reaction on the gold nanoparticle surface could be thermodynamically or kinetically controlled. The remaining gold nanoparticles in the system still suppress the generation of 1O2, which can be precipitated out simultaneously with porphyrin desorption by the proper polarity choice of the incoming sulfide to restore the 1O2 generation. Full article
(This article belongs to the Special Issue Supramolecular Chemistry on Metal Nanoparticles)
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16 pages, 4274 KiB  
Article
Construction of a Chitosan/ZnO-Based Light-Resistant Coating System to Protect Dyed Wood from Ultraviolet Irradiation via Layer-by-Layer Self-Assembly
by Zhe Luo and Yang Zhang
Int. J. Mol. Sci. 2022, 23(24), 15735; https://doi.org/10.3390/ijms232415735 - 12 Dec 2022
Cited by 2 | Viewed by 1479
Abstract
Wood dyeing is an effective way to alleviate the supply-demand imbalance of valuable wood and improve the surface decoration of fast-growing wood. However, applications of dyed wood are limited due to the susceptibility of dyes and wood to photo-discolor and degrade under light [...] Read more.
Wood dyeing is an effective way to alleviate the supply-demand imbalance of valuable wood and improve the surface decoration of fast-growing wood. However, applications of dyed wood are limited due to the susceptibility of dyes and wood to photo-discolor and degrade under light irradiation. Thus, the improved weather resistance of dyed wood is crucial. To prevent photochromic discoloration of dyed wood, an anti-photochromic coating structure was constructed via layer-by-layer self-assembly (LbL) using chitosan and zinc oxide (ZnO). The results showed that the surface color difference of treated dyed wood was reduced by approximately 84.6% after the first 2 h of irradiation under the following conditions °C: temperature (50 °C), relative humidity (55%), and irradiation intensity (550 W/m2). However, the color of untreated dyed wood drastically changed at this stage. The reason for the decrease was that the redness and yellowness of treated dye wood were significantly reduced. The deposition of ZnO onto treated dyed wood helped to protect the wood from UV light irradiation. Chitosan bridged the dyes and complexed ZnO to enhance UV resistance. This study provides valuable information for the protection of dyed wood against light discoloration that can be used as an interior and exterior decorative material. Full article
(This article belongs to the Special Issue Supramolecular Chemistry on Metal Nanoparticles)
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11 pages, 2348 KiB  
Communication
Theranostic Agent Combining Fullerene Nanocrystals and Gold Nanoparticles for Photoacoustic Imaging and Photothermal Therapy
by Riku Kawasaki, Kosuke Kondo, Risako Miura, Keita Yamana, Hinata Isozaki, Risako Shimada, Shogo Kawamura, Hidetoshi Hirano, Tomoki Nishimura, Naoki Tarutani, Kiyofumi Katagiri, Alexandra Stubelius, Shin-ichi Sawada, Yoshihiro Sasaki, Kazunari Akiyoshi and Atsushi Ikeda
Int. J. Mol. Sci. 2022, 23(9), 4686; https://doi.org/10.3390/ijms23094686 - 23 Apr 2022
Cited by 12 | Viewed by 3227
Abstract
Developing photoactivatable theranostic platforms with integrated functionalities of biocompatibility, targeting, imaging contrast, and therapy is a promising approach for cancer diagnosis and therapy. Here, we report a theranostic agent based on a hybrid nanoparticle comprising fullerene nanocrystals and gold nanoparticles (FGNPs) for photoacoustic [...] Read more.
Developing photoactivatable theranostic platforms with integrated functionalities of biocompatibility, targeting, imaging contrast, and therapy is a promising approach for cancer diagnosis and therapy. Here, we report a theranostic agent based on a hybrid nanoparticle comprising fullerene nanocrystals and gold nanoparticles (FGNPs) for photoacoustic imaging and photothermal therapy. Compared to gold nanoparticles and fullerene crystals, FGNPs exhibited stronger photoacoustic signals and photothermal heating characteristics by irradiating light with an optimal wavelength. Our studies demonstrated that FGNPs could kill cancer cells due to their photothermal heating characteristics in vitro. Moreover, FGNPs that are accumulated in tumor tissue via the enhanced permeation and retention effect can visualize tumor tissue due to their photoacoustic signal in tumor xenograft model mice. The theranostic agent with FGNPs shows promise for cancer therapy. Full article
(This article belongs to the Special Issue Supramolecular Chemistry on Metal Nanoparticles)
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Review

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17 pages, 600 KiB  
Review
Preconcentration and Separation of Gold Nanoparticles from Environmental Waters Using Extraction Techniques Followed by Spectrometric Quantification
by Ingrid Hagarová, Lucia Nemček, Martin Šebesta, Ondřej Zvěřina, Peter Kasak and Martin Urík
Int. J. Mol. Sci. 2022, 23(19), 11465; https://doi.org/10.3390/ijms231911465 - 28 Sep 2022
Cited by 6 | Viewed by 1928
Abstract
The quantification of gold nanoparticles (AuNP) in environmental samples at ultratrace concentrations can be accurately performed by sophisticated and pricey analytical methods. This paper aims to challenge the analytical potential and advantages of cheaper and equally reliable alternatives that couple the well-established extraction [...] Read more.
The quantification of gold nanoparticles (AuNP) in environmental samples at ultratrace concentrations can be accurately performed by sophisticated and pricey analytical methods. This paper aims to challenge the analytical potential and advantages of cheaper and equally reliable alternatives that couple the well-established extraction procedures with common spectrometric methods. We discuss several combinations of techniques that are suitable for separation/preconcentration and quantification of AuNP in complex and challenging aqueous matrices, such as tap, river, lake, brook, mineral, and sea waters, as well as wastewaters. Cloud point extraction (CPE) has been successfully combined with electrothermal atomic absorption spectrometry (ETAAS), inductively coupled plasma mass spectrometry (ICP-MS), chemiluminescence (CL), and total reflection X-ray fluorescence spectrometry (TXRF). The major advantage of this approach is the ability to quantify AuNP of different sizes and coatings in a sample with a volume in the order of milliliters. Small volumes of sample (5 mL), dispersive solvent (50 µL), and extraction agent (70 µL) were reported also for surfactant-assisted dispersive liquid–liquid microextraction (SA-DLLME) coupled with electrothermal vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS). The limits of detection (LOD) achieved using different combinations of methods as well as enrichment factors (EF) varied greatly, being 0.004–200 ng L−1 and 8–250, respectively. Full article
(This article belongs to the Special Issue Supramolecular Chemistry on Metal Nanoparticles)
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