Poly(vinyl chloride) (PVC) and polystyrene (PS) are among the least recycled plastics. In this work, we developed a simple novel strategy to valorize PVC PS plastics via photothermal conversion (1-chloroethyl)benzene, commodity chemical with excellent versatility. As is known release HCl gas decompose into conjugated polyenes, envisioned dual role for While in situ-generated serves as chlorine source, resulting dehydrochlorinated-PVC (DHPVC) functions agent accelerate hydrochlorination of...

Photothermal conversion can promote plastic depolymerization (chemical recycling to a monomer) through light-to-heat conversion. The highly localized temperature gradient near the photothermal agent surface allows selective heating with spatial control not observed bulk pyrolysis. However, identifying and incorporating practical agents into plastics for end-of-life have been realized. Interestingly, containing carbon black as pigment present an ideal opportunity recycling. Herein, we use...

Increasing plastic pollution presents a significant challenge for humanity and ecosystems. Photothermal (light-to-heat) conversion has emerged as promising strategy recycling waste. Upon light irradiation, photothermal agents provide intense thermal gradients localized to their surfaces, wherein the heat exceeds degradation temperature (Td) of polymers, inducing efficient depolymerization and/or degradation. Thermoplastics (including polyethylene terephthalate (PET), polypropylene (PP),...

Gas-phase reactivities of the phenylcarbyne anion and its four derivatives were studied using a linear quadrupole ion trap mass spectrometer. The anions calculated to have triplet ground state (singlet-triplet splittings 4-9 kcal mol-1), with exception 4-cyanophenylcarbyne that has singlet splitting -1.9 mol-1). Only react acetone dimethyl disulfide via radical mechanisms. On other hand, only abstracts H2O H2C═C═O from acetic acid electrophilic addition reagents anion. Finally, two...

Coupling of the radical sites in isomeric benzynes is known to hinder their reactivity. In order determine how far apart must be for them not interact, gas-phase reactivity several protonated (iso)quinoline- and acridine-based biradicals was examined. All (iso)quinolinium-based were found react slower than related monoradicals with similar vertical electron affinities (i.e., polar effects). sharp contrast, acridinium-based biradicals, most farther systems, showed greater reactivities...

Biofunctionalized conjugated polymers (i.e., carrying enzymes, antibodies, and nucleic acids) are of great interest for many biological applications, yet efficient biofunctionalization under biocompatible conditions is challenging. We report a facile strategy to make biofunctionalized through thiol-ene chemistry with embedded latent disulfide functional groups. This made possible the design cyclic disulfide-containing dioxythiophene, which can be integrated into series via acid-catalyzed...

Photothermal conversion can promote plastic depolymerization (chemical recycling) through light-to-heat conversion. The highly localized temperature gradient on photothermal agent surface allows selective heating with spatial controls not observed bulk heating. However, identifying practical agents that are easily incorporated and reusable be challenging. Interestingly, the rarely recycled black plastics containing carbon is a potential candidate for recycling. Herein, we use to depolymerize...

The gaseous 2,6-didehydropyridinium cation and its derivatives transfer a proton to reagents for which the reaction their singlet ground states is too endothermic be observed. These reactions occur from lowest-energy excited triplet states, has not been observed (or reported) other meta-benzyne analogues. Quantum chemical calculations indicate that (excited) are stronger Brønsted acids than (ground) likely due unfavorable three-center, four-electron interactions in singlet-state conjugate...

Sulfonate esters, a class of potentially mutagenic drug impurities, are strictly regulated in pharmaceuticals. On the other hand, sulfite esters and sulfones, analogs sulfonate have limited safety concerns. However, previously developed analytical methods for ester identification cannot be used to differentiate from isomeric sulfones. A tandem mass spectrometric method is introduced here differentiation these compounds. Diisopropoxymethylborane (DIMB) reacts with protonated sulfones (and...

Examination of the reactions σ-type quinolinium-based triradicals with cyclohexane in gas phase demonstrated that radical site is least strongly coupled to other two sites reacts first, independent intrinsic reactivity this site, contrast related biradicals first react at most electron-deficient site. Abstraction one or H atoms and formation an ion formally corresponds a combination accompanied by elimination atom ("addition-H") were observed. In all cases except one, reactive intrinsically...