An electrochemically controlled supramolecular zip tie based on host–guest chemistry of CB[8]

2020 ◽  
Vol 18 (27) ◽  
pp. 5228-5233
Author(s):  
Iago Neira ◽  
Olaya Domarco ◽  
Jose L. Barriada ◽  
Paola Franchi ◽  
Marco Lucarini ◽  
...  
Keyword(s):  
Radical Cation ◽  
Supramolecular Assembly ◽  
Stimuli Responsive ◽  
Guest Chemistry

A stimuli-responsive supramolecular assembly based on a bipyridinium thread and CB[8] behaves like a zip tie relaxing the chain as a consequence of the insertion of both radical cation moieties within the CB[8] macrocycle.

Supramolecular Assembly Induced Emission of Thiazole Orange with Sulfobutylether β‐cyclodextrin: A Stimuli‐Responsive Fluorescence Sensor for Tyramine

ChemPhysChem ◽  
2019 ◽  
Vol 20 (19) ◽  
pp. 2498-2505 ◽  
Author(s):  
Raman Khurana ◽  
Nilotpal Barooah ◽  
Achikanath C. Bhasikuttan ◽  
Jyotirmayee Mohanty
Keyword(s):  
Supramolecular Assembly ◽  
Fluorescence Sensor ◽  
Thiazole Orange ◽  
Stimuli Responsive

Terpyridine-functionalized stimuli-responsive microgels and their assembly through metal–ligand interactions

2018 ◽  
Vol 9 (8) ◽  
pp. 1032-1039 ◽  
Author(s):  
Jookyeong Lee ◽  
Eun Jung Choi ◽  
Imre Varga ◽  
Per M. Claesson ◽  
Sang-Ho Yun ◽  
...  
Keyword(s):  
Supramolecular Assembly ◽  
Stimuli Responsive ◽  
Ligand Interactions ◽  
Metal Ligand

We developed a terpyridine-functionalized microgel (tpy-mG) for its supramolecular assembly.

scholarly journals A conformationally adaptive macrocycle: conformational complexity and host–guest chemistry of zorb[4]arene

2018 ◽  
Vol 14 ◽  
pp. 1570-1577 ◽  
Author(s):  
Liu-Pan Yang ◽  
Song-Bo Lu ◽  
Arto Valkonen ◽  
Fangfang Pan ◽  
Kari Rissanen ◽  
...  
Keyword(s):  
Free Energy ◽  
Conformational Changes ◽  
Large Amplitude ◽  
Linear Free Energy Relationship ◽  
Stimuli Responsive ◽  
Binding Behavior ◽  
Linear Free Energy ◽  
Wide Range ◽  
Heat Capacity Changes ◽  
Guest Chemistry

Large amplitude conformational change is one of the features of biomolecular recognition and is also the basis for allosteric effects and signal transduction in functional biological systems. However, synthetic receptors with controllable conformational changes are rare. In this article, we present a thorough study on the host–guest chemistry of a conformationally adaptive macrocycle, namely per-O-ethoxyzorb[4]arene (ZB4). Similar to per-O-ethoxyoxatub[4]arene, ZB4 is capable of accommodating a wide range of organic cations. However, ZB4 does not show large amplitude conformational responses to the electronic substituents on the guests. Instead of a linear free-energy relationship, ZB4 follows a parabolic free-energy relationship. This is explained by invoking the influence of secondary C–H···O hydrogen bonds on the primary cation···π interactions based on the information obtained from four representative crystal structures. In addition, heat capacity changes (ΔC p) and enthalpy–entropy compensation phenomena both indicate that solvent reorganization is also involved during the binding. This research further deepens our understanding on the binding behavior of ZB4 and lays the basis for the construction of stimuli-responsive materials with ZB4 as a major component.

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