Journal ArticleDOI
"Flex-activated" mechanophores: using polymer mechanochemistry to direct bond bending activation.
TLDR
Studies in mechanochemical transduction that probe the activation of bonds orthogonal to an elongated polymer main chain are described, a first step toward mechanophores capable of releasing side-chain functionalities without inherently compromising the overall macromolecular architecture.Abstract:
We describe studies in mechanochemical transduction that probe the activation of bonds orthogonal to an elongated polymer main chain. Compression of mechanophore-cross-linked materials resulted in the release of small molecules via cleavage of covalent bonds that were not integral components of the elongated polymer segments. The reactivity is proposed to arise from the distribution of force through the cross-linking units of the polymer network and subsequent bond bending motions that are consistent with the geometric changes in the overall reaction. This departure from contemporary polymer mechanochemistry, in which activation is achieved primarily by force-induced bond elongation, is a first step toward mechanophores capable of releasing side-chain functionalities without inherently compromising the overall macromolecular architecture.read more
Citations
More filters
Journal ArticleDOI
Interfacial Force-Focusing Effect in Mechanophore-Linked Nanocomposites.
TL;DR: Enhanced force transmission to mechanophores is demonstrated in polymer nanocomposite materials and the interfacial force‐focusing strategy opens a new way to control the reactivity of Mechanophores and also potentially indicates interfacial damage in composite materials.
Journal ArticleDOI
Pressure induced the largest emission wavelength change in a single crystal
Zhiyong Ma,Zhiyong Ma,Xiao Meng,Ya-Jian Ji,Aisen Li,Guangyu Qi,Weiqing Xu,Bo Zou,Yuguo Ma,Gui-Chao Kuang,Xinru Jia +10 more
TL;DR: In this article, three molecules of SP-4-An-2, SP- 4-8-9 and SP-5-8 -An-9 were synthesized and their fluorescent mechanochromism was studied in their pristine crystalline state and single crystal form, respectively.
Journal ArticleDOI
Mechanochemical Kinetics in Elastomeric Polymer Networks: Heterogeneity of Local Forces Results in Nonexponential Kinetics
TL;DR: In this article, the authors used coarse-grained simulations to study the force distributions within random elastomeric networks and showed that those distributions are close to exponential regardless of the applied macroscopic load, entanglement effects, or network parameters.
Journal ArticleDOI
A D-A-D’ type organic molecule with persistent phosphorescence exhibiting dual-mode mechanochromism
TL;DR: In this paper, a new pure organic molecule ODBTCZ achieves fluorescence-RTP-DF triple emissions and dual-mode mechanochromism, which is quite rare reported in pure organic molecules.
References
More filters
Journal ArticleDOI
Force-induced activation of covalent bonds in mechanoresponsive polymeric materials
Douglas A. Davis,Andrew Hamilton,Jinglei Yang,Jinglei Yang,Lee D. Cremar,Dara Van. Gough,Stephanie L. Potisek,Mitchell T. Ong,Paul V. Braun,Todd J. Martínez,Todd J. Martínez,Scott R. White,Jeffrey S. Moore,Nancy R. Sottos +13 more
TL;DR: It is found that pronounced changes in colour and fluorescence emerge with the accumulation of plastic deformation, indicating that in these polymeric materials the transduction of mechanical force into the ring-opening reaction is an activated process.
Journal ArticleDOI
Mechanically-induced chemical changes in polymeric materials
Mary M. Caruso,Douglas A. Davis,Qilong Shen,Susan A. Odom,Nancy R. Sottos,Scott R. White,Jeffrey S. Moore +6 more
TL;DR: The purpose of this review is to broadly survey the mechanical to chemical relationships between synthetic polymers, and to consider the I-O relationship as an energy transduction process for designing stimuli-responsive materials.
Journal ArticleDOI
Mechanochemistry: the mechanical activation of covalent bonds.
TL;DR: A survey of the classical works in mechanochemistry is given and the key mechanochemical phenomena into perspective with recent results from atomic force microscopy and quantum molecular dynamics simulations are put into perspective.
Journal ArticleDOI
From mechanism to mouse: a tale of two bioorthogonal reactions.
TL;DR: Work in the laboratory led to the development of two bioorthogonal transformations that exploit the azide as a small, abiotic, and bioinert reaction partner: the Staudinger ligation and strain-promoted azide–alkyne cycloaddition.
Journal ArticleDOI
Mechanical processes in biochemistry.
TL;DR: This review provides the conceptual framework to understand the role of mechanical force in biochemistry.