Induced self-assembly and disassembly of water-soluble alkynylplatinum(ii) terpyridyl complexes with “switchable” near-infrared (NIR) emission modulated by metal–metal interactions over physiological pH: demonstration of pH-responsive NIR luminescent probes in cell-imaging studies

2013 ◽  
Vol 4 (6) ◽  
pp. 2453 ◽  
Author(s):  
Clive Yik-Sham Chung ◽  
Steve Po-Yam Li ◽  
Man-Wai Louie ◽  
Kenneth Kam-Wing Lo ◽  
Vivian Wing-Wah Yam
Keyword(s):  
Self Assembly ◽  
Near Infrared ◽  
Cell Imaging ◽  
Water Soluble ◽  
Ph Responsive ◽  
Imaging Studies ◽  
Luminescent Probes ◽  
Metal Interactions ◽  
Metal Metal ◽  
Nir Emission

A water-soluble biphen[3]arene: synthesis, host–guest complexation, and application in controllable self-assembly and controlled release

2015 ◽  
Vol 51 (20) ◽  
pp. 4188-4191 ◽  
Author(s):  
Jiong Zhou ◽  
Guocan Yu ◽  
Li Shao ◽  
Bin Hua ◽  
Feihe Huang
Keyword(s):  
Controlled Release ◽  
Self Assembly ◽  
Water Soluble ◽  
Ammonium Salts ◽  
Ph Responsive ◽  
Recognition Motif

The first water-soluble biphen[3]arene was synthesized. Its pH-responsive host–guest complexation with secondary ammonium salts in water was investigated. This novel recognition motif was further used in controllable self-assembly and controlled release.

Self-assembly of platinum(ii) 6-phenyl-2,2′-bipyridine complexes with solvato- and iono-chromic phenomena

2019 ◽  
Vol 55 (2) ◽  
pp. 229-232 ◽  
Author(s):  
Jiangjun Chen ◽  
Lei Ao ◽  
Chengpeng Wei ◽  
Cong Wang ◽  
Feng Wang
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Metal Interactions ◽  
Metal Metal

Mono- and di-nuclear platinum(ii) 6-phenyl-2,2′-bipyridine complexes display intriguing chromic phenomena, by manipulating Pt⋯Pt metal–metal interactions for the self-assembly processes.

scholarly journals Characterization and comparison of PM<sub>2.5</sub> oxidative potential assessed by two acellular assays

2020 ◽  
Vol 20 (9) ◽  
pp. 5197-5210 ◽  
Author(s):  
Dong Gao ◽  
Krystal J. Godri Pollitt ◽  
James A. Mulholland ◽  
Armistead G. Russell ◽  
Rodney J. Weber
Keyword(s):  
Metal Ions ◽  
Water Soluble ◽  
Metal Species ◽  
Urban Site ◽  
Chemical Components ◽  
Linear Regression Models ◽  
Oxidative Potential ◽  
Metal Interactions ◽  
Metal Metal

Abstract. The capability of ambient particles to generate in vivo reactive oxygen species (ROS), called oxidative potential (OP), is a potential metric for evaluating the health effects of particulate matter (PM) and is supported by several recent epidemiological investigations. Studies using various types of OP assays differ in their sensitivities to varying PM chemical components. In this study, we systematically compared two health-relevant acellular OP assays that track the depletion of antioxidants or reductant surrogates: (i) the synthetic respiratory-tract lining fluid (RTLF) assay that tracks the depletion of ascorbic acid (AA) and glutathione (GSH) and (ii) the dithiothreitol (DTT) assay that tracks the depletion of DTT. Yearlong daily samples were collected at an urban site in Atlanta, GA (Jefferson Street), during 2017, and both DTT and RTLF assays were performed to measure the OP of water-soluble PM2.5 components. PM2.5 mass and major chemical components, including metals, ions, and organic and elemental carbon were also analyzed. Correlation analysis found that OP as measured by the DTT and AA depletion (OPDTT and OPAA, respectively) were correlated with both organics and some water-soluble metal species, whereas that from the GSH depletion (OPGSH) was exclusively sensitive to water-soluble Cu. These OP assays were moderately correlated with each other due to the common contribution from metal ions. OPDTT and OPAA were moderately correlated with PM2.5 mass with Pearson's r=0.55 and 0.56, respectively, whereas OPGSH exhibited a lower correlation (r=0.24). There was little seasonal variation in the OP levels for all assays due to the weak seasonality of OP-associated species. Multivariate linear regression models were developed to predict OP measures from the particle composition data. Variability in OPDTT and OPAA were not only attributed to the concentrations of metal ions (mainly Fe and Cu) and organic compounds but also to antagonistic metal–organic and metal–metal interactions. OPGSH was sensitive to the change in water-soluble Cu and brown carbon (BrC), a proxy for ambient humic-like substances.

Water-soluble and highly emissive near-infrared nano-probes by co-assembly of ionic amphiphiles: towards application in cell imaging

2019 ◽  
Vol 43 (21) ◽  
pp. 8059-8066 ◽  
Author(s):  
Yuzhi Xing ◽  
Dahua Li ◽  
Bin Dong ◽  
Xiaocheng Wang ◽  
Chengfeng Wu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Cell Imaging ◽  
Water Soluble

Highly emissive near-infrared nano-emitters formed by co-assembly of ionic amphiphiles were applicable in cell imaging.

Near-infrared-emitting AIE multinuclear cationic Ir(iii) complex-assembled nanoparticles for photodynamic therapy

2020 ◽  
Vol 49 (43) ◽  
pp. 15332-15338
Author(s):  
Lijuan Li ◽  
Liping Zhang ◽  
Xiaofan Tong ◽  
Yite Li ◽  
Zhiyu Yang ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Self Assembly ◽  
Near Infrared ◽  
Cell Imaging

The first pure NIR-emitting AIE multinuclear Ir(iii) complex NPs obtained by self-assembly exhibit excellent cell imaging and PDT performance.

Synthesis and Electrochemical, Photophysical, and Self-Assembly Studies on Water-Soluble pH-Responsive Alkynylplatinum(II) Terpyridine Complexes

2016 ◽  
Vol 55 (9) ◽  
pp. 4650-4663 ◽  
Author(s):  
Clive Yik-Sham Chung ◽  
Steve Po-Yam Li ◽  
Kenneth Kam-Wing Lo ◽  
Vivian Wing-Wah Yam
Keyword(s):  
Self Assembly ◽  
Water Soluble ◽  
Ph Responsive

Pillar[10]arene-based host–guest complexation promoted self-assembly: from nanoparticles to uniform giant vesicles

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 40418-40421 ◽  
Author(s):  
Jie Yang ◽  
Zhengtao Li ◽  
Li Shao ◽  
Guocan Yu
Keyword(s):  
Self Assembly ◽  
Water Soluble ◽  
Ph Responsive ◽  
Giant Vesicles ◽  
Recognition Motif ◽  
Novel Host

A novel host-guest recognition motif between a water-soluble pillar[10]arene and pyrene derivative was established and further applied in the fabrication of a pH-responsive supra-amphiphile.

scholarly journals Self-assembly of alkynylplatinum(II) terpyridine amphiphiles into nanostructures via steric control and metal–metal interactions

2016 ◽  
Vol 113 (11) ◽  
pp. 2845-2850 ◽  
Author(s):  
Sammual Yu-Lut Leung ◽  
Keith Man-Chung Wong ◽  
Vivian Wing-Wah Yam
Keyword(s):  
Self Assembly ◽  
Phenylene Ethynylene ◽  
Temperature Dependent ◽  
Visible Absorption ◽  
Metal Interactions ◽  
Assembly Mechanism ◽  
Metal Metal ◽  
End Capping ◽  
Supramolecular Polymerization

A series of mono- and dinuclear alkynylplatinum(II) terpyridine complexes containing the hydrophilic oligo(para-phenylene ethynylene) with two 3,6,9-trioxadec-1-yloxy chains was designed and synthesized. The mononuclear alkynylplatinum(II) terpyridine complex was found to display a very strong tendency toward the formation of supramolecular structures. Interestingly, additional end-capping with another platinum(II) terpyridine moiety of various steric bulk at the terminal alkyne would lead to the formation of nanotubes or helical ribbons. These desirable nanostructures were found to be governed by the steric bulk on the platinum(II) terpyridine moieties, which modulates the directional metal−metal interactions and controls the formation of nanotubes or helical ribbons. Detailed analysis of temperature-dependent UV-visible absorption spectra of the nanostructured tubular aggregates also provided insights into the assembly mechanism and showed the role of metal−metal interactions in the cooperative supramolecular polymerization of the amphiphilic platinum(II) complexes.

scholarly journals Regulation of the Switchable Luminescence of Tridentate Platinum(II) Complexes by Photoisomerization

2021 ◽  
Vol 8 ◽  
Author(s):  
Yongguang Li ◽  
Yuexuan Fei ◽  
Hongcheng Sun ◽  
Shuangjiang Yu ◽  
Junqiu Liu
Keyword(s):  
Self Assembly ◽  
Luminescent Properties ◽  
Vital Role ◽  
Dual Emission ◽  
Supramolecular Materials ◽  
Metal Interactions ◽  
Ligand Charge Transfer ◽  
Metal Metal ◽  
Flat Structures ◽  
External Stimuli

Organoplatinum (II) complexes are promising candidates for the construction of smart supramolecular materials due to their unique flat structures. This accompanied by intriguing luminescent properties, prompts the molecules to aggregate after external stimuli. Nevertheless, the utilization of photo-responsive subunits to modulate their assemble behaviors and functions are still rarely explored. In this work, azobenzene (azo)-appended tridentate platinum (II) complexes with different linkers have been designed and synthesized. The intermolecular hydrogen bonding, π-π stacking, and metal-metal interactions were finely controlled through the tiny alteration of the linkers, which was found to play a vital role in self-assembly, and photophysical and photoisomerization properties. Some of them exhibited dual emission bands originating from metal-perturbed triplet intraligand (3IL) and metal-metal to ligand charge transfer (3MMLCT) excited states due to the different intermolecular interactions. Based on this, the manipulation of switchable luminescence as well as the controllable morphologies have been realized by photoisomerization.

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