Molecular binding behavior of bipyridium derivatives by water-soluble carboxylato-biphen[3]arene

2015 ◽  
Vol 51 (30) ◽  
pp. 6621-6624 ◽  
Author(s):  
Junwei Ma ◽  
Hongmei Deng ◽  
Suxiang Ma ◽  
Jian Li ◽  
Xueshun Jia ◽  
...  
Keyword(s):  
Water Soluble ◽  
Molecular Binding ◽  
Binding Behavior

Complexation of paraquat derivatives and bis(N-mono-substituted bipyridine) cations by a negatively charged carboxylato-biphen[3]arene in water is described.

Molecular binding behavior of water-soluble calix[4]arenes with asymmetric 4,4′-bipyridinium guests in aqueous solution: regioselective recognition or not?

2016 ◽  
Vol 14 (46) ◽  
pp. 10804-10811 ◽  
Author(s):  
Kui Wang ◽  
Jian-Hua Cui ◽  
Si-Yang Xing ◽  
Hong-Xi Dou
Keyword(s):  
Aqueous Solution ◽  
Water Soluble ◽  
Molecular Binding ◽  
Binding Behavior

A unique regioselective recognition of N-methyl-N′-(naphthalen-2-ylmethyl)-4,4′-bipyridinium bromide iodide using a p-sulfonatocalix[4]arene was found.

scholarly journals Synthesis and Guest-Binding Properties of pH/Reduction Dual-Responsive Cyclophane Dimer

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3097
Author(s):  
Osamu Hayashida ◽  
Yudai Tanaka ◽  
Takaaki Miyazaki
Keyword(s):  
Electrostatic Interaction ◽  
Disulfide Bonds ◽  
Water Soluble ◽  
Guest Molecules ◽  
Binding Behavior ◽  
Dual Responsive ◽  
Guest Binding ◽  
Basic Solutions ◽  
Ph Conditions ◽  
Almost All

A water-soluble cyclophane dimer having two disulfide groups as a reduction-responsive cleavable bond as well as several acidic and basic functional groups as a pH-responsive ionizable group 1 was successfully synthesized. It was found that 1 showed pH-dependent guest-binding behavior. That is, 1 strongly bound an anionic guest, 6-p-toluidinonaphthalene-2-sulfonate (TNS) with binding constant (K/M−1) for 1:1 host-guest complexes of 9.6 × 104 M−1 at pH 3.8, which was larger than those at pH 7.4 and 10.7 (6.0 × 104 and 2.4 × 104 M−1, respectively), indicating a favorable electrostatic interaction between anionic guest and net cationic 1. What is more, release of the entrapped guest molecules by 1 was easily controlled by pH stimulus. Large favorable enthalpies (ΔH) for formation of host-guest complexes were obtained under the pH conditions employed, suggesting that electrostatic interaction between anionic TNS and 1 was the most important driving force for host-guest complexation. Such contributions of ΔH for formation of host-guest complexes decreased along with increased pH values from acidic to basic solutions. Upon addition of dithiothreitol (DTT) as a reducing reagent to an aqueous PBS buffer (pH 7.4) containing 1 and TNS, the fluorescence intensity originating from the bound guest molecules decreased gradually. A treatment of 1 with DTT gave 2, having less guest-binding affinity by the cleavage of disulfide bonds of 1. Consequently, almost all entrapped guest molecules by 1 were released from the host. Moreover, such reduction-responsive cleavage of 1 and release of bound guest molecules was performed more rapidly in aqueous buffer at pH 10.7.

Interactions between water soluble porphyrin-based star polymer and amino acids: Spectroscopic evidence of molecular binding

2005 ◽  
Vol 71 (2) ◽  
Author(s):  
Nicola Angelini ◽  
Norberto Micali ◽  
Valentina Villari ◽  
Placido Mineo ◽  
Daniele Vitalini ◽  
...  
Keyword(s):  
Amino Acids ◽  
Water Soluble ◽  
Star Polymer ◽  
Spectroscopic Evidence ◽  
Molecular Binding ◽  
Water Soluble Porphyrin

Molecular binding behaviors and thermodynamics of ferrocenyl dimethylaminium derivatives by anionic pillar[5]arene

2015 ◽  
Vol 13 (44) ◽  
pp. 10808-10812 ◽  
Author(s):  
Cui-Fang Zhang ◽  
Sheng-Hua Li ◽  
Cai-Cai Zhang ◽  
Yu Liu
Keyword(s):  
Water Soluble ◽  
Molecular Binding ◽  
Synthetic Strategy

A novel anionic water-soluble pillar[5]arene (4C-WP5A) was synthesized via a convenient synthetic strategy of the direct cyclization of a functionalized hydroquinone monomer.

Molecular binding behavior of a bispyridinium-containing bis(β-cyclodextrin) and its corresponding [2]rotaxane towards bile salts

2014 ◽  
Vol 12 (16) ◽  
pp. 2559 ◽  
Author(s):  
Ying-Ming Zhang ◽  
Ze Wang ◽  
Yong Chen ◽  
Hong-Zhong Chen ◽  
Fei Ding ◽  
...  
Keyword(s):  
Bile Salts ◽  
Molecular Binding ◽  
Binding Behavior

scholarly journals Synthesis and Guest-Binding Behavior of Water-Soluble Cyclophanes Bearing PEG Residues

2014 ◽  
Vol 04 (04) ◽  
pp. 409-416 ◽  
Author(s):  
Osamu Hayashida ◽  
Yuki Nakamura ◽  
Takuya Sato
Keyword(s):  
Water Soluble ◽  
Binding Behavior ◽  
Guest Binding

Molecular Binding Behavior of Pyridine-2,6-dicarboxamide-Bridged Bis(β-cyclodextrin) with Oligopeptides:  Switchable Molecular Binding Mode

2004 ◽  
Vol 15 (2) ◽  
pp. 300-306 ◽  
Author(s):  
Yu Liu ◽  
Guo-Song Chen ◽  
Yong Chen ◽  
Fei Ding ◽  
Tao Liu ◽  
...  
Keyword(s):  
Binding Mode ◽  
Molecular Binding ◽  
Binding Behavior
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