Zhang, Yudi; Wang, Zi; Kouznetsova, Tatiana B.; Sha, Ye; Xu, Enhua; Shannahan, Logan; Fermen-Coker, Muge; Lin, Yangju; Tang, Chuanbing; Craig, Stephen L. published the artcile< Distal conformational locks on ferrocene mechanophores guide reaction pathways for increased mechanochemical reactivity>, Related Products of 627-27-0, the main research area is distal conformational lock ferrocene mechanophore guide reaction mechanochem reactivity.
Mechanophores can be used to produce strain-dependent covalent chem. responses in polymeric materials, including stress strengthening, stress sensing and network remodelling. In general, it is desirable for mechanophores to be inert in the absence of force but highly reactive under applied tension. Metallocenes possess potentially useful combinations of force-free stability and force-coupled reactivity, but the mechanistic basis of this reactivity remains largely unexplored. Here, we have used single-mol. force spectroscopy to show that the mech. reactivities of a series of ferrocenophanes are not correlated with ring strain in the reactants, but with the extent of rotational alignment of their two cyclopentadienyl ligands. Distal attachments can be used to restrict the mechanism of ferrocene dissociation to proceed through ligand ‘peeling’, as opposed to the more conventional ‘shearing’ mechanism of the parent ferrocene, leading the dissociation rate constant to increase by several orders of magnitude at forces of ∼1 nN. It also leads to improved macroscopic, multi-responsive behavior, including mechanochromism and force-induced crosslinking in ferrocenophane-containing polymers.
Nature Chemistry published new progress about Activation entropy. 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, Related Products of 627-27-0.
Referemce:
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