Ion‐Pairing Assemblies of Porphyrin–Au III Complexes in Combination with π‐Electronic Receptor–Anion Complexes

2020 ◽  
Vol 15 (4) ◽  
pp. 494-498 ◽  
Author(s):  
Hiroki Tanaka ◽  
Yohei Haketa ◽  
Yuya Bando ◽  
Ryohei Yamakado ◽  
Nobuhiro Yasuda ◽  
...  
Keyword(s):  
Ion Pairing ◽  
Anion Complexes

Ion-Pairing Crystal Polymorphs of Interlocked [2 + 1]-Type Receptor–Anion Complexes

2016 ◽  
Vol 81 (18) ◽  
pp. 8530-8536 ◽  
Author(s):  
Ryohei Yamakado ◽  
Ryuma Sato ◽  
Yasuteru Shigeta ◽  
Hiromitsu Maeda
Keyword(s):  
Ion Pairing ◽  
Anion Complexes ◽  
Type Receptor

Dimension-controlled ion-pairing assemblies based on π-electronic charged species

2017 ◽  
Vol 53 (20) ◽  
pp. 2894-2909 ◽  
Author(s):  
Yohei Haketa ◽  
Hiromitsu Maeda
Keyword(s):  
Recent Progress ◽  
Ion Pairs ◽  
Ion Pairing ◽  
Feature Article ◽  
Charged Species ◽  
Anion Complexes

This feature article summarizes the recent progress in the study of ion-pairing assemblies based on π-electronic ion pairs, including anion complexes of π-electronic molecules.

π-Electron Systems That Form Planar and Interlocked Anion Complexes and Their Ion-Pairing Assemblies

2015 ◽  
Vol 22 (2) ◽  
pp. 626-638 ◽  
Author(s):  
Ryohei Yamakado ◽  
Tsuneaki Sakurai ◽  
Wakana Matsuda ◽  
Shu Seki ◽  
Nobuhiro Yasuda ◽  
...  
Keyword(s):  
Ion Pairing ◽  
Electron Systems ◽  
Anion Complexes

Photo-responsive dimension-controlled ion-pairing assemblies based on anion complexes of π-electronic systems

2019 ◽  
Vol 55 (69) ◽  
pp. 10269-10272 ◽  
Author(s):  
Ryohei Yamakado ◽  
Yohei Haketa ◽  
Mitsuo Hara ◽  
Shusaku Nagano ◽  
Takahiro Seki ◽  
...  
Keyword(s):  
Ion Pairing ◽  
Electronic Systems ◽  
Aliphatic Chain ◽  
Anion Complexes

Negatively charged π-electronic systems, prepared by the complexation of dipyrrolyldiketone BF2 complexes with an azobenzene bearing an alkanoate and an aliphatic chain, provided dimension-controlled assemblies, showing the photo-responsive behaviour.

Ion-Pairing Assemblies Comprising Anion Complexes of π-Extended Anion-Responsive Molecules

2019 ◽  
Vol 84 (14) ◽  
pp. 8886-8898 ◽  
Author(s):  
Shinya Sugiura ◽  
Wakana Matsuda ◽  
Wanying Zhang ◽  
Shu Seki ◽  
Nobuhiro Yasuda ◽  
...  
Keyword(s):  
Ion Pairing ◽  
Anion Complexes

Ion Pairing and Dielectric Decrement in Glycosaminoglycan Brushes

2020 ◽  
Author(s):  
James Sterling ◽  
Wenjuan Jiang ◽  
Wesley M. Botello-Smith ◽  
Yun L. Luo
Keyword(s):  
Molecular Dynamics ◽  
Ion Pairs ◽  
Mean Field ◽  
Salt Bridge ◽  
Ion Pairing ◽  
Donnan Potential ◽  
Mean Field Models ◽  
Ion Exclusion ◽  
Dynamics Simulations ◽  
Contact Ion Pairs

Molecular dynamics simulations of hyaluronic acid and heparin brushes are presented that show important effects of ion-pairing, water dielectric decrease, and co-ion exclusion. Results show equilibria with electroneutrality attained through screening and pairing of brush anionic charges by cations. Most surprising is the reversal of the Donnan potential that would be expected based on electrostatic Boltzmann partitioning alone. Water dielectric decrement within the brush domain is also associated with Born hydration-driven cation exclusion from the brush. We observe that the primary partition energy attracting cations to attain brush electroneutrality is the ion-pairing or salt-bridge energy associated with cation-sulfate and cation-carboxylate solvent-separated and contact ion pairs. Potassium and sodium pairing to glycosaminoglycan carboxylates and sulfates consistently show similar abundance of contact-pairing and solvent-separated pairing. In these crowded macromolecular brushes, ion-pairing, Born-hydration, and electrostatic potential energies all contribute to attain electroneutrality and should therefore contribute in mean-field models to accurately represent brush electrostatics.

Photoisomerization-induced patterning of ion-pairing materials based on anionic azobenzene and its complex with a fluorescent π-electronic system

2021 ◽  
Vol 57 (35) ◽  
pp. 4287-4290
Author(s):  
Ryohei Yamakado ◽  
Issei Kitamura ◽  
Mitsuo Hara ◽  
Shusaku Nagano ◽  
Takahiro Seki ◽  
...  
Keyword(s):  
Surface Tension ◽  
Mass Transport ◽  
Trace Amount ◽  
Ion Pairs ◽  
Ion Pairing ◽  
Electronic System ◽  
Large Mass ◽  
System P ◽  
The Difference

Large mass transport driven by the difference in the photoisomerization-induced surface tension was demonstrated in ion pairs, enabling fluorescence patterning using a trace amount of photoisomerized anions in complexation with a π-electronic system.

Pyrrole-bridged quinones: π-electronic systems that modulate electronic structures by tautomerism and deprotonation

2021 ◽  
Author(s):  
Shinya Sugiura ◽  
Hiromitsu Maeda
Keyword(s):  
Infrared Absorption ◽  
Electronic Structures ◽  
Near Infrared ◽  
Ion Pairing ◽  
Anion Binding ◽  
Electronic Systems

A new series of π-extended quinone derivatives containing a pyrrole bridge exhibited NH/OH-type tautomerization and anion binding along with deprotonation that induced near-infrared absorption and ion-pairing assemblies.

scholarly journals Synthetic, Spectroscopic, Structural, and Electrochemical Investigations of Ferricenium Derivatives with Weakly Coordinating Anions: Ion Pairing, Substituent, and Solvent Effects

2021 ◽  
Author(s):  
Firoz Shah Tuglak Khan ◽  
Amy L Waldbusser ◽  
Maria C. C. Carrasco ◽  
Hadi Pourhadi ◽  
Shabnam Hematian
Keyword(s):  
Solvent Effects ◽  
Ion Pairing ◽  
Effective Strategy ◽  
Weakly Coordinating Anions ◽  
Weakly Coordinating ◽  
Electron Withdrawing Substituents

A facile and effective strategy for the preparation of a series of ferricenium complexes bearing either electron-donating or electron-withdrawing substituents with weakly coordinating anions such as [B(C6F5)4]– or SbF6– is...

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