Alkynyl-protected silver nanoclusters featuring an anticuboctahedral kernel

Nanoscale ◽  
2017 ◽  
Vol 9 (32) ◽  
pp. 11405-11409 ◽  
Author(s):  
Shang-Fu Yuan ◽  
Pei Li ◽  
Qing Tang ◽  
Xian-Kai Wan ◽  
Zi-Ang Nan ◽  
...  
Keyword(s):  
Silver Nanoclusters ◽  
Structural Determination ◽  
Metal Nanoclusters ◽  
Coinage Metal ◽  
First Time

Structural determination reveals that alkynyl-protected silver nanoclusters contain anticuboctahedral kernels, which are observed in coinage-metal nanoclusters for the first time.

Alkynyl-protected gold and gold–silver nanoclusters

2017 ◽  
Vol 46 (11) ◽  
pp. 3427-3434 ◽  
Author(s):  
Zhen Lei ◽  
Xian-Kai Wan ◽  
Shang-Fu Yuan ◽  
Jia-Qi Wang ◽  
Quan-Ming Wang
Keyword(s):  
Structural Features ◽  
Silver Nanoclusters ◽  
Luminescence Properties ◽  
Metal Nanoclusters ◽  
Coinage Metal ◽  
Catalytic Behavior ◽  
Gold Silver

Alkynyl-protected coinage metal nanoclusters show new structural features and have interesting luminescence properties and catalytic behavior.

scholarly journals Formation of Silver Nanoclusters from a DNA Template Containing Ag(I)-Mediated Base Pairs

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
J. Christian Léon ◽  
Linda Stegemann ◽  
Martin Peterlechner ◽  
Stefanie Litau ◽  
Gerhard Wilde ◽  
...  
Keyword(s):  
Cd Spectroscopy ◽  
Silver Nanoclusters ◽  
Metal Nanoclusters ◽  
Base Pairs ◽  
Templated Growth ◽  
Double Helices ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Dna Template ◽  
First Time

A series of DNA double helices containing different numbers of silver(I)-mediated base pairs involving the artificial nucleobases imidazole or 2-methylimidazole has been applied for the generation of DNA-templated silver nanoclusters. The original Ag(I)-containing nucleic acids as well as the resulting nanoclusters and nanoparticles have been characterized by means of UV/Vis spectroscopy, circular dichroism (CD) spectroscopy, fluorescence spectroscopy, and transmission electron microscopy (TEM). The results show for the first time that metal-mediated base pairs can be used for the templated growth of metal nanoclusters.

Phytochemical Constituents of Annona reticulata and their Cytotoxic Activity

2020 ◽  
Vol 17 (3) ◽  
pp. 206-210
Author(s):  
Ty Viet Pham ◽  
Thang Quoc Le ◽  
Anh Tuan Le ◽  
Hung Quoc Vo ◽  
Duc Viet Ho
Keyword(s):  
Cytotoxic Activity ◽  
Cell Lines ◽  
Structural Determination ◽  
Phytochemical Investigation ◽  
Ic50 Values ◽  
Phytochemical Constituents ◽  
First Time ◽  
Annona Reticulata

A phytochemical investigation of the leaves of Annona reticulata led to the isolation and structural determination of β-sitosterol (1), ent-pimara-8(14),15-dien-19-oic acid (2), ent-pimara- 8(14),15-dien-19-ol (3), quercetin (4), quercetin 3-O-α-L-arabinopyranoside (5), and a mixture of quercetin 3-O-β-D-galactopyranoside (6a) and quercetin 3-O-β-D-glucopyranoside (6b). Of these, compounds 2 and 3 were isolated from the genus Annona for the first time. Compound 3 showed strong cytotoxicity against SK-LU-1 and SW626 cell lines with IC50 values of 17.64 ± 1.07 and 19.79 ± 1.41 μg mL-1, respectively.

Synthesis of cationically charged photoluminescent coinage metal nanoclusters by sputtering over a liquid polymer matrix

2017 ◽  
Vol 41 (14) ◽  
pp. 6828-6833 ◽  
Author(s):  
Ryan D. Corpuz ◽  
Yohei Ishida ◽  
Tetsu Yonezawa
Keyword(s):  
Polymer Matrix ◽  
Synthetic Approach ◽  
Metal Nanoclusters ◽  
Coinage Metal ◽  
Biocompatible Polymer ◽  
Liquid Polymer

A generic green synthetic approach to synthesize photoluminescent metal nanoclusters of known plasmonic elements via sputtering on a biocompatible polymer matrix.

Interactions of thiol and alkoxy radical with coinage metal nanoclusters

2019 ◽  
Vol 487 ◽  
pp. 1409-1419 ◽  
Author(s):  
Sheik Haseena ◽  
Ravva Mahesh Kumar ◽  
Varatharaj Rajapandian ◽  
Venkatesan Subramanian
Keyword(s):  
Metal Nanoclusters ◽  
Alkoxy Radical ◽  
Coinage Metal

Circularly polarized luminescence in chiral silver nanoclusters

2017 ◽  
Vol 53 (7) ◽  
pp. 1269-1272 ◽  
Author(s):  
Jatish Kumar ◽  
Tsuyoshi Kawai ◽  
Takuya Nakashima
Keyword(s):  
Circular Dichroism ◽  
Mirror Image ◽  
Silver Nanoclusters ◽  
Dihydrolipoic Acid ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
First Time ◽  
Circular Dichroïsm

Sets of mirror image circular dichroism (CD) and circularly polarized luminescence (CPL) spectra are for the first time demonstrated using enantiomeric dihydrolipoic acid (DHLA)-capped silver nanoclusters.

scholarly journals Metallic Nanoclusters for Cancer Imaging and Therapy

2018 ◽  
Vol 25 (12) ◽  
pp. 1379-1396 ◽  
Author(s):  
Qing Zhang ◽  
Mingying Yang ◽  
Ye Zhu ◽  
Chuanbin Mao
Keyword(s):  
Chemical Reduction ◽  
Synthetic Methods ◽  
Silver Nanoclusters ◽  
Metal Nanoclusters ◽  
High Quantum Yield ◽  
Online Databases ◽  
Metallic Nanoclusters ◽  
Theranostic Agents ◽  
Cancer Theranostics ◽  
New Generation

Background: Nanoclusters are made of a few to tens of atoms with a size below 2 nm. Compared with nanoparticles, they exhibited excellent properties, such as tunable fluorescence, ease of conjugation, high quantum yield and biocompatibility, which are highly desired in the development of cancer nanotheranostics. Hence, the metallic nanoclusters have emerged as a newcomer in cancer nanomedicines. This review aims to summarize recently developed approaches to preparing metallic nanoclusters, highlight their applications in cancer theranostics, and provide a brief outlook for the future developments of nanoclusters in nanomedicine. Method: We carried out a thorough literature search using online databases. The search was focused on a centered question. Irrelevant articles were excluded after further examination and directly relevant articles were included. The relevant articles were classified by the subjects and the information from these articles was synthesized. Results: One hundred and forty-three articles were included in this review. About eighty articles outlined the development in the synthetic methods of nanoclusters. The synthesis approaches include chemical reduction, photoreduction and so on. The progress in the application of gold and silver nanoclusters to cancer theranostics was described in fifteen and eight articles, respectively. The rest articles were about the advancements in the use of other metal nanoclusters and nanocluster nanocomposites as cancer theranostic agents. Conclusion: This review summarizes the synthesis and use of metallic nanoclusters or their nanocomposites as cancer theranostic agents. It confirms their importance, advantages and potentials in serving as a new generation of cancer theranostics in clinics.

scholarly journals Preparation and Catalysis of Polymer-Protected Coinage Metal Nanoclusters.

2000 ◽  
Vol 57 (6) ◽  
pp. 346-355 ◽  
Author(s):  
Yukihide SHIRAISHI ◽  
Kazutaka HIRAKAWA ◽  
Naoki TOSHIMA
Keyword(s):  
Metal Nanoclusters ◽  
Coinage Metal

scholarly journals Tailoring silver nanoclusters via doping: advances and opportunities

2021 ◽  
Author(s):  
Jie Yang ◽  
Runqiang Pang ◽  
Dongpo Song ◽  
Man-Bo Li
Keyword(s):  
Noble Metal ◽  
Silver Nanoclusters ◽  
Metal Nanoclusters ◽  
Significant Progress ◽  
Au Nanoclusters ◽  
Noble Metal Nanoclusters

Atomically precise noble metal nanoclusters (espically Au and Ag) have been pursued due to their fascinating molecular-like properties. In spite of the significant progress of Au nanoclusters (NCs), the structure...

scholarly journals DNA-Templated Fluorescent Silver Nanoclusters Inhibit Bacterial Growth While Being Non-Toxic to Mammalian Cells

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4045
Author(s):  
Lewis Rolband ◽  
Liam Yourston ◽  
Morgan Chandler ◽  
Damian Beasock ◽  
Leyla Danai ◽  
...  
Keyword(s):  
Mammalian Cells ◽  
Antibacterial Properties ◽  
Silver Nanoclusters ◽  
Metal Nanoclusters ◽  
Fluorescent Properties ◽  
Dna Oligonucleotides ◽  
Mammalian Cell Lines ◽  
History Of ◽  
The Stability

Silver has a long history of antibacterial effectiveness. The combination of atomically precise metal nanoclusters with the field of nucleic acid nanotechnology has given rise to DNA-templated silver nanoclusters (DNA-AgNCs) which can be engineered with reproducible and unique fluorescent properties and antibacterial activity. Furthermore, cytosine-rich single-stranded DNA oligonucleotides designed to fold into hairpin structures improve the stability of AgNCs and additionally modulate their antibacterial properties and the quality of observed fluorescent signals. In this work, we characterize the sequence-specific fluorescence and composition of four representative DNA-AgNCs, compare their corresponding antibacterial effectiveness at different pH, and assess cytotoxicity to several mammalian cell lines.

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