Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The use of metal-free catalysts to convert CO into valuable chemicals is very challenging. Here, we synthesized a conjugated organic polymer (TpTf-1) featuring 2,4,6-Triphenyl-1,3,5-Triazine as the acceptor unit, triphenylamine as the donor unit, and vinylidene bond as the linkage. The local structure of donor-acceptor (D-A) forms an intramolecular electric field that can promote the separation of photogenerated electrons and charges, meanwhile, the vinylidene bond can further change the charge distribution to promote exciton dissociation. Without the use of photosensitizers, the TpTf-1 exhibits outstanding selectivity of CO of up to 91.96 %, with a production rate of 45.2 μmol g h at visible light, which is 3.4-fold than TaTf-1 with the same D-A structure but linking in imine bond and is 2.8-fold than TpTf-2 linking in vinylidene bond but with a different donor unit. Moreover, TpTf-1 has a CO production rate of up to 117.3 μmol g h under full wavelength light irradiation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/chem.202402593 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Crystalline Boravinylidene from an Arrested Hydroboration Reaction.
J Am Chem Soc
August 2025
Baylor University, Department of Chemistry and Biochemistry, One Bear Place #97348, Waco, Texas 76798, United States.
Boravinylidenes are intermediates in 1,1-hydroboration reactions of alkynes en route to vinyl boranes. Unlike transition metal-vinylidene complexes, boravinylidenes have hitherto, not been crystallographically characterized. Pairing bis(trimethylsilyl)ethyne with an extremely potent hydroboration reagent, bis(1-methyl--carboranyl)borane, enables crystallization and characterization of a boravinylidene.
View Article and Find Full Text PDFIron-Catalyzed trans-Hydrostannation of Terminal Alkynes.
Angew Chem Int Ed Engl
August 2025
Max-Planck-Institut für Kohlenforschung, Mülheim/Ruhr, 45470, Germany.
The readily accessible iron complex [Cp*FeCl(tmeda)] is an effective catalyst for the highly regio- and stereoselective trans-hydrostannylation of terminal alkyl alkynes, affording a type of alkenylstannanes that is difficult to make otherwise. The RSn- moiety is faithfully delivered to the terminal C-atom, unless a propargylic or homo-propargylic ─OH or ─NH group is present in the substrate, which (partly or fully) inverts the regiochemical course; this steering effect, however, can be switched off upon protection of the protic site. The trans-addition likely starts by insertion of the [Cp*FeCl] fragment into the RSn─H bond, followed by a migratory insertion of the ligated alkyne into the Fe─Sn unit of the Fe(IV) species thus formed.
View Article and Find Full Text PDFSynthesis, Structure, and Reactivity of a 1-Stannavinylidene-NHC Complex: A Heavier Group-14 Analogue of Vinylidene.
Chemistry
August 2025
College of Science, Department of Chemistry, Rikkyo University, Toshima-ku, Tokyo, 171-8501, Japan.
The first stable 1-stannavinylidene-NHC complex with bulky silyl substituents has been obtained from the retro-dimerization of cyclic 1,3-bis(stannylene) with an N-heterocyclic carbene (NHC). To accomplish the retro-dimerization of cyclic 1,3-bis(stannylene), a suitably sized NHC is required. Both in the solid state and in solution, 1-stannavinylidene-NHC complex is characterized by the presence of a C = Sn π bond.
View Article and Find Full Text PDFThe Role of Elemental Factors in the Reactivity of Combination Reactions between Heavy Vinylidene-Like Molecules and Carbene Analogues.
Inorg Chem
June 2025
Department of Applied Chemistry, National Chiayi University, Chiayi 60004, Taiwan.
Utilizing the M06-2X-D3/def2-TZVP approach, we studied the capture reactions of carbene-like with NHC-supported vinylidene analogs, (NHC):→C═G14(Br)(Tbb) (; G14 = group 14 element). The findings indicate that the C═G14 double bond is formed through electron-sharing interactions between the triplet (NHC):→C and triplet G14(Br)(Tbb) fragments for G14 elements including C, Si, Ge, Sn, and Pb. Our computational study suggests that only vinylidene analogs bearing C═Si and C═Ge double bonds can effectively capture and proceed through a 1,2-migration reaction.
View Article and Find Full Text PDFA key component of cooling devices is the transfer of entropy from the cold load to heat sink. An electrocaloric (EC) polymer capable of generating both large electrocaloric effect (ECE) and substantial electroactuation can enable EC cooling devices to pump heat without external mechanisms, resulting in compact designs and enhanced efficiency. However, achieving both high ECE and significant electroactuation remains challenging.
View Article and Find Full Text PDF