Mechanical activation of polymers containing two adjacent mechanophores

Abstract

Polymers containing two adjacent mechanophores cleave at the same as a single-mechanophore chains.

Empowering self-reporting polymer blends with orthogonal optical properties responsive in a broader force range

“…Therefore, our results indicated that the difference between Rh and Ad didn't translate into an observable impact on the activation of PU/PLLA-10% in the bulk state, or the mechanochemical coupling effect on the scission rate of adjacent Rh and Ad was not sufficient enough to be detected. 52 …”

Diels–Alder Cycloadditions of Bio-Derived Furans with Maleimides as a Sustainable «Click» Approach towards Molecular, Macromolecular and Hybrid Systems

“…However, many important areas, including the development of room-temperature self-remendable polymers, application of acceptor-substituted furans for the synthesis of fine chemicals and materials, need further study. Moreover, new, industrially relevant technologies towards the pro- Besides thermal initiation, rDA reaction in CANs can be driven by other stimuli, such as light [107], mechanical [138] or magnetic force [139]. Light-responsive CANs based on a photocontrolled DA reaction could be obtained by the introduction of the fluorescent fragment into diene or dienophile [107,140,141].…”

“…A comparison of the rate of coupling for some fmDA adducts has shown that the efficiency of thermal and mechanical activation is not equal and depends on the regio-and stereo structure of the adducts: some diastereomers can be mechano-resistant due to misalignment of the dynamic DA bonds with the force vector providing ineffective mechanochemical interactions [147]. Besides thermal initiation, rDA reaction in CANs can be driven by other stimuli, such as light [107], mechanical [138] or magnetic force [139]. Light-responsive CANs based on a photocontrolled DA reaction could be obtained by the introduction of the fluorescent fragment into diene or dienophile [107,140,141].…”

Force-Modulated Reductive Elimination from Platinum(II) Diaryl Complexes

“…1,2 Mechanochemical strategies continue to evolve, including in very recent years their use in biasing and probing reaction pathways, 3,4 the release of small molecules and protons, 5,6 stress reporting, [7][8][9][10][11] stress strengthening, 12,13 degradable polymers, 14,15 and fundamental studies of polymer behavior under load. 16 In organic reactions, mechanochemical coupling has been investigated in simple bond dissociation reactions [17][18][19] and in a wide variety of reaction classes with respect to regiochemistry, [20][21][22][23][24] orbital symmetry, 20,[25][26][27] stereochemistry, 28,29 supramolecular architecture, [30][31][32] dynamic effects, 33,34 and the alignment and/or loading of scissile bonds with applied tension. 35,36 Unlike their organic counterparts, however, mechanochemical reactions in organometallic complexes have been focused almost entirely on the direct, forced dissociation of a ligand, including some of the earliest examples of polymer mechanochemistry, [37][38][39][40] the release of latent catalysts, [41]…”