Emerging properties from mechanical tethering within a post-synthetically functionalised catenane scaffold

Abstract

Using a post-synthetic modification strategy we have prepared a series of functionalised [2]catenanes to study the impact of mechanically-enforced proximity on functional group properties, including emission, electrochemistry and photoreactivity.

Electrochemical switching in mechanically interlocked molecules (MIMs)

“…where precise molecular level control has been achieved. In its most comprehensive scope of applications, they began to endow such molecules as making molecular machines, [171][172][173][174] molecular sensors, [175][176][177][178][179] molecular electronics, [180][181][182][183] drug delivery, [184][185][186] molecular switches, 164,[187][188][189] and, catalysis. 176,[190][191][192] The molecular switching discussed herein has different binding sites responsible for shuttling/switching when an external stimulus is applied.…”

Multistate Structural Switching of [3]Catenanes with Cyclic Porphyrin Dimers by Complexation with Amine Ligands

“…[1][2][3][4][5][6][7][8] In particular, interlocked macrocyclic structures, such as catenanes, are promising components for molecular motors, [9][10][11] optical materials, [12][13][14] and polymeric materials [15][16][17][18] because of the switchable structural states of catenanes, including the relative positions or dynamics of their cyclic components. [19][20][21] More recently, multistate switchable catenanes have received considerable attention for their contribution to next-generation molecular machines and supramolecular materials with finely controllable chemical or mechanical properties. [13,[22][23][24] The structural states of catenanes have been switched by many kinds of supramolecular interactions, such as coordination bonds, [25] hydrogen bonds, [26] π-π interactions, [27] and hydrophobic interactions, [28] which fix the macrocycles through the interactions or allow the macrocycles to move to other structural states.…”

“…Mechanically interlocked molecules are advantageous for a variety of applications owing to their flexible mechanical bonds [1–8] . In particular, interlocked macrocyclic structures, such as catenanes, are promising components for molecular motors, [9–11] optical materials, [12–14] and polymeric materials [15–18] because of the switchable structural states of catenanes, including the relative positions or dynamics of their cyclic components [19–21] . More recently, multistate switchable catenanes have received considerable attention for their contribution to next‐generation molecular machines and supramolecular materials with finely controllable chemical or mechanical properties [13, 22–24] …”

Multistate Structural Switching of [3]Catenanes with Cyclic Porphyrin Dimers by Complexation with Amine Ligands

“…[1][2][3][4][5][6][7][8] In particular, interlocked macrocyclic structures, such as catenanes, are promising components for molecular motors, [9][10][11] optical materials, [12][13][14] and polymeric materials [15][16][17][18] because of the switchable structural states of catenanes, including the relative positions or dynamics of their cyclic components. [19][20][21] More recently, multistate switchable catenanes have received considerable attention for their contribution to next-generation molecular machines and supramolecular materials with finely controllable chemical or mechanical properties. [13,[22][23][24] The structural states of catenanes have been switched by many kinds of supramolecular interactions, such as coordination bonds, [25] hydrogen bonds, [26] π-π interactions, [27] and hydrophobic interactions, [28] which fix the macrocycles through the interactions or allow the macrocycles to move to other structural states.…”

“…Mechanically interlocked molecules are advantageous for a variety of applications owing to their flexible mechanical bonds [1–8] . In particular, interlocked macrocyclic structures, such as catenanes, are promising components for molecular motors, [9–11] optical materials, [12–14] and polymeric materials [15–18] because of the switchable structural states of catenanes, including the relative positions or dynamics of their cyclic components [19–21] . More recently, multistate switchable catenanes have received considerable attention for their contribution to next‐generation molecular machines and supramolecular materials with finely controllable chemical or mechanical properties [13, 22–24] …”