Supramolecularly modulated carbon-centered radicals: toward selective oxidation from benzyl alcohol to aldehyde
Chem Commun (Camb). 2024 Apr 25. doi: 10.1039/d4cc01240b. Online ahead of print.ABSTRACTThe reactivity of ketyl radicals and benzoyl radicals, two key intermediates of photo-induced oxidation of benzyl alcohol, can be stabilized by the host-guest interaction of the radicals with cucurbit[7]uril. As a result, the selectivity of photo-induced oxidation from benzyl alcohol to aldehyde is significantly improved by diminishing side reactions and inhibiting the generation of carboxylic acid products. This work presents a new route to modulate the reactivity of radical intermediates, enriching the chemistry of supramolecular inte...
Source: Chemical Communications - April 25, 2024 Category: Chemistry Authors: Xingchen Tang Shan Mei Jiang-Fei Xu Xi Zhang Source Type: research
Gram-scale synthesis of small-sized PtM intermetallics as high-performance catalysts for the hydrogen evolution reaction
Chem Commun (Camb). 2024 Apr 25. doi: 10.1039/d4cc00849a. Online ahead of print.ABSTRACTPt-based intermetallics exhibit excellent activity in electrocatalysis. However, their controlled syntheses remain difficult. Herein, carbon-supported PtM (M = Fe, Co, Ni, Zn and Mn) intermetallics with small size (3 nm) were prepared at the gramscale and applied as a highly effective electrocatalyst for the hydrogen evolution reaction.PMID:38659401 | DOI:10.1039/d4cc00849a (Source: Chemical Communications)
Source: Chemical Communications - April 25, 2024 Category: Chemistry Authors: Bentian Zhang Lijie Zhang Han Yang Mengtao Shan Lei Bai Zirong Li Ming Sun Source Type: research
Organic hole transport materials for high performance PbS quantum dot solar cells
Chem Commun (Camb). 2024 Apr 25. doi: 10.1039/d4cc01194e. Online ahead of print.ABSTRACTWe developed a triazatruxene-based hole transport material (HTM), 3Ka-DBT-3Ka, aiming to enhance band alignment and augment charge generation and collection in devices, as an alternative for 1,2-ethanedithiol (EDT). The PbS CQD solar cells employing 3Ka-DBT-3Ka as the HTM achieve a peak efficiency of 11.4%, surpassing devices employing the conventional PbS-EDT HTM (8.9%).PMID:38659410 | DOI:10.1039/d4cc01194e (Source: Chemical Communications)
Source: Chemical Communications - April 25, 2024 Category: Chemistry Authors: Li Zhang Shunqiang Wang Yi Shi Jiazi Xu Shuang Cao Zijian Deng Yong Chen Junjie Zhang Xichuan Yang Zhen Meng Quli Fan Bin Sun Source Type: research
Enabling wide temperature battery operation with hybrid lithium electrolytes
Chem Commun (Camb). 2024 Apr 25. doi: 10.1039/d4cc01110d. Online ahead of print.ABSTRACTWe demonstrate that an ionic liquid 1-ethyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide combined with propylene carbonate and lithium bis(trifluoromethanesulfonyl)imide yields a hybrid electrolyte that enables a wide operational temperature window (-20 °C to 60 °C). When integrated into a lithium titanate‖lithium cobalt oxide full-cell configuration, high-rate capability is achieved at -20 °C with >40% retention at a C/2 cycling rate, and negligible capacity fade is observed during rate capability tests and long-term...
Source: Chemical Communications - April 25, 2024 Category: Chemistry Authors: Spencer A Langevin Tanner Hamann Courtney McHale Jesse S Ko Source Type: research
Structural effects of oxidation on sugars: glucose as a precursor of gluconolactone and glucuronolactone
We present an experimental work on the changes in the structure and interactions of two products of glucose oxidation (D-glucono-1,5-lactone (GlcL) and D-glucurono-6,3-lactone (GlcurL)) with respect to their precursor. Features such as intramolecular interactions, ring puckering and tautomerism were observed.PMID:38661549 | DOI:10.1039/d4cc00735b (Source: Chemical Communications)
Source: Chemical Communications - April 25, 2024 Category: Chemistry Authors: Maider Parra-Santamaria Aran Insausti Elena R Alonso Francisco J Basterretxea Emilio J Cocinero Source Type: research
Nonheme binuclear transition metal complexes with hydrosulfide and polychalcogenides
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc00929k. Online ahead of print.ABSTRACTThe intriguing chemistry of chalcogen (S, Se)-containing ligands and their capability to bridge multiple metal centres have resulted in a plethora of reports on transition metal complexes featuring hydrosulfide (HS-) and polychalcogenides (En2-, E = S, Se). While a large number of such molecules are strictly organometallic complexes, examples of non-organometallic complexes featuring HS- and En2- with N-/O-donor ligands are relatively rare. The general synthetic procedure for the transition metal-hydrosulfido complexes involves the reac...
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: Kamal Hossain Sayan Atta Anuj Baran Chakraborty Soumik Karmakar Amit Majumdar Source Type: research
Mechanoresponsive luminescence triggered by phase transition of a supercooled copper(I) complex
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc00815d. Online ahead of print.ABSTRACTUnder mechanical stimulation, a copper(I) complex in its supercooled liquid state transforms into a crystalline phase, showing a dramatic emission color change from red to green that is accompanied by a 20-fold increase in the photoluminescence quantum yield up to 87%. This reversible phase transition relies on the intriguing ability of this copper complex to form a supercooled metastable state.PMID:38654619 | DOI:10.1039/d4cc00815d (Source: Chemical Communications)
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: J érémy Delafoulhouze Marie Cordier Jean-Yves Mevellec Florian Massuyeau Olivier Hernandez Camille Latouche Sandrine Perruchas Source Type: research
Cascade ring expansion reactions for the synthesis of medium-sized rings and macrocycles
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc01303d. Online ahead of print.ABSTRACTThis Feature Article discusses recent advances in the development of cascade ring expansion reactions for the synthesis of medium-sized rings and macrocycles. Cascade ring expansion reactions have much potential for use in the synthesis of biologically important medium-sized rings and macrocycles, most notably as they don't require high dilution conditions, which are commonly used in established end-to-end macrocyclisation methods. Operation by cascade ring expansion method can allow large ring products to be accessed via rearrangements...
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: Jack M Wootton Jerry K F Tam William P Unsworth Source Type: research
Self-assembled tetrazine cryptophane for ion pair recognition and guest release by cage disassembly
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc01421a. Online ahead of print.ABSTRACTHereby, we describe the synthesis of a self-assembled syn-cryptophane using dynamic nucleophilic aromatic substitution of tetrazines. 1H NMR cage titrations reveal that the tetramethylammonium cation binds under slow exchange conditions while counter-anions show a fast exchange regime. Finally, the cryptophane can be disassembled by the addition of thiols allowing guest release.PMID:38656223 | DOI:10.1039/d4cc01421a (Source: Chemical Communications)
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: Louise Miton Elise Antonetti Marie Poujade Jean-Pierre Dutasta Paola Nava Alexandre Martinez Yoann Cotelle Source Type: research
A two carbon homologation of Friedel-Crafts alkylation enabled by photochemical alkene stitching: modular assembly of cyclolignans
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc00957f. Online ahead of print.ABSTRACTHerein we report an efficient two-carbon homologated variant of Friedel-Crafts alkylation via photochemical radical alkene stitching. Readily available feedstock alkenes are used as bridges between photogenerated alkyl radicals and arenes, opening a route to γ-aryl-carbonyls for chemo-divergent access to aryltetralone and γ-lactones, a gateway to 2,7'-cyclolignans.PMID:38656305 | DOI:10.1039/d4cc00957f (Source: Chemical Communications)
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: Shyamal Pramanik Apurba Samanta Soumitra Maity Source Type: research
Advances in the structural engineering of layered bismuth-based semiconductors for visible light-driven photocatalytic water splitting
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc00455h. Online ahead of print.ABSTRACTHydrogen production via the photocatalytic water splitting reaction on semiconductors presents a promising avenue to directly achieve solar energy conversion and storage. Bismuth-based semiconductors with layered structures, a hierarchical arrangement of components stacked in the form of two-dimensional extended layers where the atoms within each layer are typically strongly bonded, while the interactions between the layers are relatively weak, have emerged as an important series of photocatalyst candidates. In this review, we focus on ...
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: Xiaoping Tao Xiaoyuan Zhou Rengui Li Source Type: research
Nonheme binuclear transition metal complexes with hydrosulfide and polychalcogenides
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc00929k. Online ahead of print.ABSTRACTThe intriguing chemistry of chalcogen (S, Se)-containing ligands and their capability to bridge multiple metal centres have resulted in a plethora of reports on transition metal complexes featuring hydrosulfide (HS-) and polychalcogenides (En2-, E = S, Se). While a large number of such molecules are strictly organometallic complexes, examples of non-organometallic complexes featuring HS- and En2- with N-/O-donor ligands are relatively rare. The general synthetic procedure for the transition metal-hydrosulfido complexes involves the reac...
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: Kamal Hossain Sayan Atta Anuj Baran Chakraborty Soumik Karmakar Amit Majumdar Source Type: research
Mechanoresponsive luminescence triggered by phase transition of a supercooled copper(I) complex
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc00815d. Online ahead of print.ABSTRACTUnder mechanical stimulation, a copper(I) complex in its supercooled liquid state transforms into a crystalline phase, showing a dramatic emission color change from red to green that is accompanied by a 20-fold increase in the photoluminescence quantum yield up to 87%. This reversible phase transition relies on the intriguing ability of this copper complex to form a supercooled metastable state.PMID:38654619 | DOI:10.1039/d4cc00815d (Source: Chemical Communications)
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: J érémy Delafoulhouze Marie Cordier Jean-Yves Mevellec Florian Massuyeau Olivier Hernandez Camille Latouche Sandrine Perruchas Source Type: research
Cascade ring expansion reactions for the synthesis of medium-sized rings and macrocycles
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc01303d. Online ahead of print.ABSTRACTThis Feature Article discusses recent advances in the development of cascade ring expansion reactions for the synthesis of medium-sized rings and macrocycles. Cascade ring expansion reactions have much potential for use in the synthesis of biologically important medium-sized rings and macrocycles, most notably as they don't require high dilution conditions, which are commonly used in established end-to-end macrocyclisation methods. Operation by cascade ring expansion method can allow large ring products to be accessed via rearrangements...
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: Jack M Wootton Jerry K F Tam William P Unsworth Source Type: research
Self-assembled tetrazine cryptophane for ion pair recognition and guest release by cage disassembly
Chem Commun (Camb). 2024 Apr 24. doi: 10.1039/d4cc01421a. Online ahead of print.ABSTRACTHereby, we describe the synthesis of a self-assembled syn-cryptophane using dynamic nucleophilic aromatic substitution of tetrazines. 1H NMR cage titrations reveal that the tetramethylammonium cation binds under slow exchange conditions while counter-anions show a fast exchange regime. Finally, the cryptophane can be disassembled by the addition of thiols allowing guest release.PMID:38656223 | DOI:10.1039/d4cc01421a (Source: Chemical Communications)
Source: Chemical Communications - April 24, 2024 Category: Chemistry Authors: Louise Miton Elise Antonetti Marie Poujade Jean-Pierre Dutasta Paola Nava Alexandre Martinez Yoann Cotelle Source Type: research
