148692-70-0Relevant academic research and scientific papers
Mechanically linked polyrotaxanes: A stepwise approach
Werts, Michel P.L.,Van Den Boogaard, Maarten,Tsivgoulis, Gerasimos M.,Hadziioannou, George
, p. 7004 - 7013 (2003)
A new synthetic approach for the preparation of mechanically linked polyrotaxanes was developed. Two variations of rotaxane monomers were synthesized, based on diphenylmethane and tetraphenylmethane blocking groups. Both rotaxanes bear a protected phenol
Inclusion of carboxyl function inside of cucurbiturils and its use in molecular switches
Kolman, Viktor,Kulhanek, Petr,Sindelar, Vladimir
, p. 2386 - 2392 (2010)
We have prepared organic guest molecules in which two pyridinium rings are connected through an aromatic/aliphatic bridge bearing a carboxyl group. The supramolecular interactions between these guests and macrocyclic hosts cucurbit[7]uril (CB7) and cucurb
Reduction response containing double-disulfide bond of chemical connector and its preparation and use (by machine translation)
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Paragraph 0076; 0078, (2018/01/11)
Reduction response containing double-disulfide bond of chemical connector and its preparation and use thereof, relates to a double-mercapto compound and its forming with double-disulfide bond of chemical linker, based on the non-coherent double-two-sulfur of the synergistic effect of the tenon, construction with unique oxidation-reduction response dynamic covalent linkage. The covalent linkage with traditional single disulfide bond completely different oxidation-reduction response; its low reducing agent concentration or extracellular conditions having ultra high stability, such as in the cell in the strong reducing conditions can occur under rapid reduction of the fracture. It is expected to be applied to the drug release and biological sensing field, constructing the oxidation-reduction responsive drug delivery system, such as the monoclonal antibody - such as the drug in the sample. (by machine translation)
Thermodynamic forecasting of mechanically interlocked switches
Olson, Mark A.,Braunschweig, Adam B.,Ikeda, Taichi,Fang, Lei,Trabolsi, Ali,Slawin, Alexandra M. Z.,Khan, Saeed I.,Stoddart, J. Fraser
scheme or table, p. 4391 - 4405 (2009/12/25)
Mechanically interlocked molecular (MIM) switches in the form of bistable [2]rotaxanes and [2]catenanes have proven to be - when incorporated in molecular electronic devices (MEDs) and in nanoelectromechanical systems (NEMS) - a realistic and viable alternative to the silicon chip density challenge. Structural modifications and chemical environment can have a large impact on the relaxation thermodynamics of the molecular motions, such as translation and circumrotation in bistable rotaxanes and catenanes responsible for the operation of devices based on MIMs. The effects of structural modifications on the difference in free energy (ΔGo) for the equilibrium processes in switchable MIMs can be predicted by considering, firstly, the interactions present in their precursor pseudorotaxanes. By employing isothermal titration microcalorimetry (ITC) to investigate the thermodynamic parameters governing pseudorotaxane formation for a series of monosubstituted, acceptor host cyclophanes with various donor guests, in conjunction with X-ray crystallographic data, an obvious link between the noncovalent bonding interactions in pseudorotaxanes and MIMs that survive following the formation of the mechanical bond can be identified. It follows that the changes (ΔΔGo values) in the difference of free energy during the formation of different pseudorotaxanes can subsequently be extrapolated to predict ΔGo values for the thermodynamics associated with switching in analogous MIM switches, employing the same donor-acceptor recognition components. In this manner, a systematic and predictive thermodynamic approach to designing and tuning switchable MIMs and MIM-based materials has been established. Additionally, these thermodynamic relationships are reminiscent of the long forgotten concept of the 'parachor' as a molecular descriptor with respect to the additivity of physical properties in chemical systems dealing specifically with quantitative structure property-activity relationships (QSPR/QSAR).
Electroorganic reactions. Part 53. The electrosynthesis of novel water-soluble poly-(p-xylylene) (PPX) and poly (p-phenylenevinylene) (PPV) polymers and co-polymers
Utley,Smith
, p. 2642 - 2646 (2007/10/03)
Controlled potential reduction at an Hg pool cathode of 2,5-bis(bromomethyl)benzenesulfonic acid, 2,5-bis(dibromomethyl)benzenesulfonic acid and the analogous benzoic acids, in aqueous solution with ammonium acetate or lithium nitrate electrolyte, is an efficient route to the corresponding water-soluble PPX and PPV polymers. Co-electrolyses of combinations of these precursors yield water-soluble random co-polymers. The polymers were primarily examined by gel-permeation chromatography, FTIR, 1H and 13C NMR (solution and solid state). The sulfonic acid substituted PPX forms insoluble complexes or salts with Ba2+, Fe3+ and Cu2+.
Simple mechanical molecular and supramolecular machines: Photochemical and electrochemical control of switching processes
Ashton, Peter R.,Ballardini, Roberto,Balzani, Vincenzo,Boyd, Sue E.,Credi, Alberto,Gandolfi, Maria T.,Gomez-Lopez, Marcos,Iqbal, Sayeedha,Philp, Douglas,Preece, Jon A.,Prodi, Luca,Ricketts, Howard G.,Stoddart, J. Fraser,Tolley, Malcolm S.,Venturi, Margherita,White, Andrew J. P.,Williams, David J.
, p. 152 - 170 (2007/10/03)
Photochemical control of a self-assembled supramolecular 1:1 pseudorotaxane (formed between a tetracationic cyclophane, namely the tetrachloride salt of cyclobis(paraquat-p-phenylene), and 1,5-bis[2-(2-(2-hydroxy)ethoxy)ethoxy]naphthalene has been achieve
