A one-step synthesis of polyrotaxane via in situ Michael addition reaction

The Synthesis and Characterization of Spacer-Free Liquid Crystal Polyrotaxane by Virtue of the Mobility of Threaded α-Cyclodextrins

“…The synthetic route of LCPR was shown in Scheme . First, α‐CD and vinyl‐PEG were mixed in aqueous solution to form polypseudorotaxane (PPR), and then thiolated β‐CD was used to end‐cap PPR in situ via Michael reaction to obtain PR . This PR preparation strategy can not only achieve high yield but also be capable of tuning the CD coverage ratio for PR preparation.…”

“…First, α-CD and vinyl-PEG were mixed in aqueous solution to form polypseudorotaxane (PPR), [17][18][19][20][21][22] and then thiolated β-CD was used to end-cap PPR in situ via Michael reaction to obtain PR. [ 23 ] This PR preparation strategy can not only achieve high yield but also be capable of tuning the CD coverage ratio for PR preparation. The latter is vital for LCPR preparation since it has some effect on the mobility threaded CDs.…”

The synthesis and characterization of a processable polyrotaxane-based triblock copolymer via a “two steps” strategy

“…The typical synthesis of PR macroinitiator (PR macroinitiator-7) capped by adamantine moiety via Michael addition was as follows. 32 10 mL aqueous solution containing a-CDs (2.23 g, 2.3 mmol) was added into 1 mL aqueous solution of SHPEG (0.2 g, 0.05 mmol), the precipitation was formed gradually and the mixing solution was stirred continuously for 24 h. Aer freezedrying, the solid was dissolved in 5 mL DMF, then AD stopper (0.18 g, 0.5 mmol), and TEA (0.005 g, 0.05 mmol) were added into the mixture. Aer stirring for another 24 h, the mixture was centrifuged to get the solid crude product.…”

Polyhedral oligomeric silsesquioxane-based hybrid networks obtained via thiol-epoxy click chemistry

“…Thus, the char yields of hybrid networks were increased to 6.2, 7.8, 10.1, 12.7, and 15.1% by G-POSS loadings from 0 to 15 wt%. This improvement 1 3 thiol-based (e.g., thiol-ene, thiol-yne, thiol-epoxy, and thiol-Michael) click reactions [19] provide several advantages such as metal-free catalyst system, reasonable reaction times, using benign or no solvent, and requirement of simple purification techniques.…”