Unconventional
fluorescent polymers have attracted increasing attention
due to their facile synthesis, excellent biocompatibility, and novel
photophysical properties. In this work, a truly multicolor emissive
hyperbranched polysiloxane (HBPSi-β-CD) is obtained through
adjusting the distribution of electron-rich atoms and grafting β-cyclodextrin;
the quantum yields of HBPSi-β-CD after being excited by 360,
420, 450, and 550 nm are 19.36, 31.46, 46.14 and 44.84%, respectively.
The density functional theory calculations reveal that the truly multicolor
emission is derived from the formed electron delocalization among
the hydroxyl, amine, ether, and −Si(O)3 groups due
to the strong intermolecular interaction, high density of electron-rich
atoms, and low steric hindrance among functional groups. The prepared
polymers could serve as a multisensitivity sensor in detecting Fe3+, Cu2+, and Co2+. The HBPSi-β-CD
shows low cytotoxicity and excellent cellular imaging capability.
The self-assembly of HBPSi-β-CD also possesses high drug loading
capacity and pH-controlled drug release, especially, the drug delivery
system could be applied in the visualization of controlled drug delivery.
A POSS–PCL shape memory network is synthesized. The cage-like POSS not only serves as a chemical netpoint, also causes improvement in mechanical properties. Optimized networks exhibit both excellent tensile strength and nearly complete recovery.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.