Self-immolative
polymers are an emerging class of macromolecules
with distinct disassembly profiles that set them apart from other
general degradable materials. These polymers are programmed to disassemble
spontaneously from head to tail, through a domino-like fragmentation,
upon response to extremal stimuli. In the time since we first reported
this unique type of molecule, several groups around the world have
developed new, creative molecular structures that perform analogously
to our pioneering polymers. Self-immolative polymers are now widely
recognized as an important class of stimuli-responsive materials for
a wide range of applications such as signal amplification, biosensing,
drug delivery, and materials science. The quinone-methide elimination
was shown to be an effective tool to achieve rapid domino-like fragmentation
of polymeric molecules. Thus, numerous applications of self-immolative
polymers are based on this disassembly chemistry. Although several
other fragmentation reactions achieved the function requested for
sequential disassembly, we predominantly focused in this Perspective
on examples of self-immolative polymers that disassemble through the
quinone-methide elimination. Selected examples of self-immolative
polymers that disassembled through other chemistries are briefly described.
The growing demand for stimuli-responsive degradable materials with
novel molecular backbones and enhanced properties guarantees the future
interest of the scientific community in this unique class of polymers.
Adamantyl‐dioxetane luminophores are an important class of chemiluminescent molecular probes for diagnostics and imaging. We have developed a new efficient synthetic route for preparation of adamantyl‐enolether as precursors for dioxetane chemiluminescent luminophores. The synthesis is convergent, using an unusual Stille cross‐coupling reaction employing a stannane‐enolether, to directly afford adamantyl‐enolether. In a following simple step, the dioxetane is obtained by oxidation of the enolether precursor with singlet‐oxygen. The scope of this synthetic route is broad since a large number of haloaryl substrates are either commercially available or easily accessible. Such a late‐stage derivatization strategy simplifies the rapid exploration of novel luminogenic molecular structures in a library format and simplifies the synthesis of known dioxetane luminophores. We expect that this new synthetic strategy will be particularly useful in the design and synthesis of yet unexplored dioxetane chemiluminescent luminophores.
We report a chemiluminescent probe (CLPT1) that permits the paired detection of tyrosinase (Tyr) and biological thiols. Tyr only leads to a poor chemiluminescence response, a finding ascribed to the...
Influenza A virus is the most virulent influenza subtype and is associated with large-scale global pandemics characterized by high levels of morbidity and mortality. Developing simple and sensitive molecular methods...
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.