Multiple molecular logic gate arrays in one system of (2-(2′-pyridyl)imidazole)Ru(ii) complexes and trimeric cyclophanes in water

Abstract

Shape-switchable cyclophane hosts allow the controlled capture and release of reactive polypyridineRu(II) complexes in water. This gives rise to a network of host-guest binding, acid-base reactions in ground and excited...

Switchable metallacycles and metallacages

“…Hence, a series of redox-driven switching components are expected to endow switchability to metallacycles and metallacages, such as ketone-alcohol groups. 91,94,114…”

“…This journal is © The Royal Society of Chemistry 2023 components are expected to endow switchability to metallacycles and metallacages, such as ketone-alcohol groups. 91,94,114 Supramolecular chemistry is playing an increasingly significant role in practical applications. However, most research presented to date only focuses on the supramolecular switching process.…”

Shape-shifting p-cyclophanes as portals to switching, sensing, delivery and logic operations in water

“…In particular, proton in the excited state would have to compete with luminescence. The effect of hosts on luminescence intensity-pH profiles proved to be dramatic, 37,43 in that the luminescence of G4 was switched 'on' at pH 7 due to nesting binding by trialcoholdodecacarboxylate host HA5, and to a slightly lesser extent by nesting host trialcoholhexacarboxylate HA4. Naturally, perching binding due to host HK4 produced a smaller effect.…”

“…44 Time-resolved luminescence spectroscopy of G4 Luminescence lifetimes of guest G4 with cyclophane hosts also showed significant lengthening. 43 The combination of such lifetime data with quantum yield results obtained from steady state luminescence measurements allowed the extraction of radiative and nonradiative rate constants. The latter confirmed the conclusions of the previous paragraph, i.e.…”

A Tool, an App and a Field: Fluorescent PET Sensors, Blood Electrolyte Analysis and Molecular Logic as Products of Supramolecular Photoscience from Northern Ireland and Sri Lanka

“…Receptors are now available for polypyridineRu(II) complexes. [38][39][40][41] such as a trimeric version of dimeric cyclophane 6. Although PET thermodynamics are not feasible here, the related Ir(III) cases appear promising.…”