Pathway Dependence in Redox‐Driven Metal–Organic Gels

Abstract

Pathway dependence is common in self‐assembly. Herein, the importance of pathway dependence for redox‐driven gels is shown by constructing a FeII/FeIII redox‐based metal–organic gel system is shown. In situ oxidation of the FeII ions at different rates results in conversion of a FeII gel into a FeIII organic gel, which controls the material properties, such as gel stiffness, gel strength, and an unusual swelling behaviour, is described. The rate of formation of FeIII ions determines the extent of intermolecular interactions and so whether gelation or precipitation occurs.

Self‐Foaming Metal‐Organic Gels Based on Phytic Acid and Their Mechanical, Moldable, and Load‐Bearing Properties.

“…These results indicate that ‐H 2 PO 4 groups of PA coordinated with metal ions successfully. Such unusual coexistence of mixed valence states (Fe(III)/Fe(II), Cu(II)/Cu(I), Co(III)/Co(II)) may result from the confined environment inside the gel matrix [57,58] …”

Phytic Acid‐Based FeCo Bimetallic Metal‐Organic Gels for Electrocatalytic Oxygen Evolution Reaction

“…For PA‐FeCo‐1 : 2 : 2 the signals at 781.9 eV and 784.8 eV correspond to Co(III) 2p 3/2 and Co(II) 2p 3/2 , respectively. The coexistence of Co(III) and Co(II) may be caused by the confined environment inside the gel matrix [45,46] . The slight changes in the binding energies of the three materials indicate that the coordination interaction between Co 3+ /Co 2+ and phytic acid is little affected by the processing methods.…”

Programming properties of transient hydrogels by an enzymatic reaction

“…Differences in the aggregation and alignment of the molecules in the assembled structure may also play an important role in selfassembly. 45,50 To better understand the development of the gels in absence and presence of NaOH, time sweep rheology was conducted ( Fig. 2b and c).…”