Multi-responsive microgel of hyperbranched poly(ether amine) (hPEA-mGel) for the selective adsorption and separation of hydrophilic fluorescein dyes

2012 ◽  
Vol 22 (34) ◽  
pp. 17976 ◽  
Author(s):  
Bao Li ◽  
Xuesong Jiang ◽  
Jie Yin
Keyword(s):  
Selective Adsorption ◽  
Hyperbranched Poly ◽  
Fluorescein Dyes

Hyperbranched poly(ether amine) nanomicelles as nanoreactors for the unexpected ultrafast photolysis of fluorescein dyes

2018 ◽  
Vol 9 (20) ◽  
pp. 2727-2732 ◽  
Author(s):  
Tao Tao ◽  
Ruiqing Wang ◽  
Hongjie Xu ◽  
Jie Yin ◽  
Xuesong Jiang
Keyword(s):  
Hyperbranched Poly ◽  
Fluorescein Dyes

hPEA nanomicelles can encapsulate fluorescein dyes as a nanoreactor, leading to the fast photobleaching of dyes.

Supramolecular Networks of Hyperbranched Poly(ether amine) (hPEA) Nanogel/Chitosan (CS) for the Selective Adsorption and Separation of Guest Molecules

2015 ◽  
Vol 48 (7) ◽  
pp. 2022-2029 ◽  
Author(s):  
Jin Li ◽  
Zhilong Su ◽  
Hongjie Xu ◽  
Xiaodong Ma ◽  
Jie Yin ◽  
...  
Keyword(s):  
Selective Adsorption ◽  
Guest Molecules ◽  
Hyperbranched Poly ◽  
Supramolecular Networks

Hyperbranched poly(ether amine)@poly(vinylidene fluoride) (hPEA@PVDF) porous membranes for selective adsorption and molecular filtration of hydrophilic dyes

2017 ◽  
Vol 5 (21) ◽  
pp. 10470-10479 ◽  
Author(s):  
Kejia Ji ◽  
Hongjie Xu ◽  
Xiaodong Ma ◽  
Jie Yin ◽  
Xuesong Jiang
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Vinylidene Fluoride ◽  
Selective Adsorption ◽  
Porous Membranes ◽  
High Flux ◽  
Flux Rate ◽  
Hyperbranched Poly ◽  
Poly Vinylidene Fluoride

hPEA@PVDF membranes can separate dyes in aqueous solution through molecular filtration with a high flux rate and large adsorption capacity.

Selective Adsorption and Separation through Molecular Filtration by Hyperbranched Poly(ether amine)/Carbon Nanotube Ultrathin Membranes

Langmuir ◽  
2016 ◽  
Vol 32 (49) ◽  
pp. 13073-13083 ◽  
Author(s):  
Yuannan Zhang ◽  
Xiaodong Ma ◽  
Hongjie Xu ◽  
Zixing Shi ◽  
Jie Yin ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Selective Adsorption ◽  
Hyperbranched Poly ◽  
Ultrathin Membranes

Fluorescence ratio imaging of dynamic intracellular ionic signals

1988 ◽  
Vol 46 ◽  
pp. 42-43
Author(s):  
R. Y. Tsien ◽  
A. Minta ◽  
M. Poenie ◽  
J.P.Y. Kao ◽  
A. Harootunian
Keyword(s):  
Binding Sites ◽  
Living Cells ◽  
Molecular Engineering ◽  
Ph Indicators ◽  
Highly Sensitive ◽  
Fluorescence Ratio Imaging ◽  
Ratio Imaging ◽  
Technical Advances ◽  
Indicator Dyes ◽  
Fluorescein Dyes

Recent technical advances now enable the continuous imaging of important ionic signals inside individual living cells with micron spatial resolution and subsecond time resolution. This methodology relies on the molecular engineering of indicator dyes whose fluorescence is strong and highly sensitive to ions such as Ca2+, H+, or Na+, or Mg2+. The Ca2+ indicators, exemplified by fura-2 and indo-1, derive their high affinity (Kd near 200 nM) and selectivity for Ca2+ to a versatile tetracarboxylate binding site3 modeled on and isosteric with the well known chelator EGTA. The most commonly used pH indicators are fluorescein dyes (such as BCECF) modified to adjust their pKa's and improve their retention inside cells. Na+ indicators are crown ethers with cavity sizes chosen to select Na+ over K+: Mg2+ indicators use tricarboxylate binding sites truncated from those of the Ca2+ chelators, resulting in a more compact arrangement of carboxylates to suit the smaller ion.

Atom-probe analysis of the solid-liquid interface

1995 ◽  
Vol 53 ◽  
pp. 676-677
Author(s):  
J.A. Panitz
Keyword(s):  
Molecular Level ◽  
Selective Adsorption ◽  
Electronic Devices ◽  
Atom Probe ◽  
Chemical Agent ◽  
Hostile Environment ◽  
Solid Interface ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Chemically Selective

The first few atomic layers of a solid can form a barrier between its interior and an often hostile environment. Although adsorption at the vacuum-solid interface has been studied in great detail, little is known about adsorption at the liquid-solid interface. Adsorption at a liquid-solid interface is of intrinsic interest, and is of technological importance because it provides a way to coat a surface with monolayer or multilayer structures. A pinhole free monolayer (with a reasonable dielectric constant) could lead to the development of nanoscale capacitors with unique characteristics and lithographic resists that surpass the resolution of their conventional counterparts. Chemically selective adsorption is of particular interest because it can be used to passivate a surface from external modification or change the wear and the lubrication properties of a surface to reflect new and useful properties. Immunochemical adsorption could be used to fabricate novel molecular electronic devices or to construct small, “smart”, unobtrusive sensors with the potential to detect a wide variety of preselected species at the molecular level. These might include a particular carcinogen in the environment, a specific type of explosive, a chemical agent, a virus, or even a tumor in the human body.

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