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Journals Chemical Communications : Chem...

Chemical Communications : Chem Comm

https://read.qxmd.com/read/38536064/ag-in-zn-s-alloyed-nanocrystals-as-photocatalysts-of-controlled-light-mediated-radical-polymerization
#1
JOURNAL ARTICLE
Patrycja Kowalik, Piotr Bujak, Mateusz Penkala, Anna Iuliano, Ireneusz Wielgus, Karolina Peret, Adam Pron
We report on the first case of the use of nonstoichiometric ternary (Ag-In-Zn-S) semiconductor nanocrystals as photoinitiators and photocatalysts of methyl methacrylate (MMA) polymerization. Two types of nanocrystals were tested, differing in their composition and characterized by red ( λ max = 731 nm) and green ( λ max = 528 nm) photoluminescence, respectively. Exploiting their reducing properties and capability of free radical generation we demonstrate that under ultraviolet (UV) radiation they effectively photoinitiate radical polymerization of MMA whereas under visible light (blue or green) they act as photocatalysts of living radical polymerization...
March 27, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38535993/modulating-the-ferroelectric-phases-in-cholesteryl-based-organic-compounds-with-perfluoroalkyl-tail-engineering
#2
JOURNAL ARTICLE
Huan-Huan Jiang, Nan Zhang, Wei-Xin Mao, Jin-Fei Lan, Long-Xing Zhou, Hua-Ming Xu, Han-Yue Zhang, Wei-Qiang Liao
Here, we synthesized a series of cholesteryl-based compounds, whose phases and their transformation can be modulated by temperature and the chain length of the fluoroalkyl moieties. To our knowledge, this is the first time that the phase transition could be modulated with perfluoroalkyl tail engineering in organic single-component ferroelectric crystals.
March 27, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38534062/cyanometallic-charge-engineering-in-spin-crossover-metal-organic-frameworks
#3
JOURNAL ARTICLE
Bang-Heng Lyu, Kai-Ping Xie, Wen Cui, Yan-Cong Chen, Guan-Xi Chen, Si-Guo Wu, Ming-Liang Tong
In this study, we successfully synthesize cationic/neutral/anionic inverse-Hofmann-type spin crossover (SCO) frameworks with 1,1,2,2-tetrakis(4-(pyridine-4-yl)phenyl)-ethene ligand by means of cyanometallic charge engineering strategy. The cationic and neutral frameworks exhibit single-step thermally induced spin transition behaviors, while the SCO capability of anionic framework can be aroused by partial desolvation. This strategy provides a new idea to construct ionic SCO frameworks and extends the toolkit for SCO materials...
March 27, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38533657/a-new-armchair-carbon-nanobelt-synthesized-by-tuning-the-regioselectivity-of-the-scholl-reaction-of-quinquephenyl
#4
JOURNAL ARTICLE
Zeming Xia, Ka Man Cheung, Han Chen, Sai Ho Pun, Qian Miao
A new armchair carbon nanobelt is successfully synthesized by tuning the regioselectivity of the Scholl reaction of 1,1':2',1'':4'',1''':2''',1''''-quinquephenyl. This nanobelt exhibits a preferential binding affinity towards C70 over C60 as found from photoluminescence titration experiments.
March 27, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38533635/photocatalytic-selective-oxidation-of-toluene-under-encapsulated-air-conditions
#5
JOURNAL ARTICLE
Jing Cui, Kai-Kai Niu, Rong-Zhen Zhang, Hui Liu, Shengsheng Yu, Ling-Bao Xing
Benzaldehydes are indispensable building blocks in chemistry. However, the selective oxidation of toluene to benzaldehyde remains an ongoing challenge due to the low oxidation potential of benzaldehyde compared to toluene. We report herein a mild protocol that combines hydrogen atom transfer (HAT) with encapsulated air conditions and suitable catalyst loading for selective oxidation of toluene with high selectivity as well as good functional-group tolerance and a broad substrate scope for the synthesis of various high-value aromatic aldehydes...
March 27, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38533605/catalytic-dehydrogenative-coupling-and-reversal-of-methanol-amines-advances-and-prospects
#6
REVIEW
Yujing Zhang, Xiaomei Yang, Shimin Liu, Jiacheng Liu, Shaofeng Pang
The development of efficient hydrogen release and storage processes to provide environmentally friendly hydrogen solutions for mobile energy storage systems (MESS) stands as one of the most challenging tasks in addressing the energy crisis and environmental degradation. The catalytic dehydrogenative coupling of methanol and amines (DCMA) and its reverse are featured by high capacity for hydrogen release and storage, enhanced capability to purify the produced hydrogen, avoidance of carbon emissions and singular product composition, offering the environmentally and operationally benign strategy of overcoming the challenges associated with MESS...
March 27, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38533558/a-radical-1-4-aryl-migration-enables-nickel-catalysed-remote-cross-electrophile-coupling-of-%C3%AE-bromo-amino-acid-esters-with-vinyl-triflates
#7
JOURNAL ARTICLE
Yin-Ling Liu, Jian Liu, Xin-Yu Li, Peng He, Yu-Xuan Liu, Mei Xiang, Shi Tang
A radical 1,4-aryl migration enabling a cross-electrophile coupling reaction toward remote trans alkylation of N -benzyl alanine has been developed. In this strategy, with the occurrence of a radical-mediated Turce-Smiles rearrangement, key α-aminoalkyl radicals are generated. The as-formed α-aminoalkyl radical serves as a robust coupling partner for cross-electrophilic coupling with vinyl triflates, affording a series of olefin-tethered amino acid motifs.
March 27, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38530770/a-dynamic-covalent-approach-to-pt-n-l-2-n-2-n-cages
#8
JOURNAL ARTICLE
Quinn V C van Hilst, Aston C Pearcy, Dan Preston, L James Wright, Christian G Hartinger, Heather J L Brooks, James D Crowley
A dynamic covalent approach was exploited to generate a family of homometallic [Pt n L2 n ]2 n + cage (predominantly [Pt2 L4 ]4+ systems) architectures. The family of platinum(II) architectures were characterized using 1 H nuclear magnetic resonance (NMR) and diffusion ordered spectroscopy (DOSY), electrospray ionization mass spectrometry (ESI-MS) and the molecular structures of two cages were determined by X-ray crystallography.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38530742/instant-p-doping-and-pore-elimination-of-the-spiro-ometad-hole-transport-layer-in-perovskite-solar-cells
#9
JOURNAL ARTICLE
Zhipeng Fu, Tian Hou, Xin Wang, Kaipeng Chen, Guangmian Jiang, Xiaoshan Li, Linhu Xiang, Xiaoran Sun, Hua Yu, Xu Liu, Meng Zhang
An instant p-doping strategy employing 4- tert -butyl-2-chloropyridine and tert -butyl peroxybenzoate for the spiro-OMeTAD hole-transport layer (HTL) in perovskite solar cells (PSCs) is proposed to replace the conventional 4- tert -butylpyridine-doped HTL. The novel doping process eliminates the formation of pores in the HTL. Meanwhile, a 21.4% efficiency is achieved on the corresponding absolute methylammonium-free PSCs with significantly improved thermal and moisture stability.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38530709/nifeb-assisted-adsorption-and-activation-of-nitrogen-to-improve-the-photooxidation-activity-of-zinc-porphyrin
#10
JOURNAL ARTICLE
Xuan Zhang, Yawen Tan, Juntao Zhao, Zixuan Cai, Jun Zhang, Puttaswamy Madhusudan
This study effectively addresses the challenge of nitrogen adsorption and activation in photocatalytic nitrogen fixation by introducing an oxidizing co-catalyst, NiFeB hydroxides. The NiFeB hydroxides could provide reactive active sites and significantly enhance the nitrogen oxidation activity, offering a novel pathway for co-catalysts in nitrogen fixation reactions.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38530669/hydroxylation-of-the-indium-tin-oxide-electrode-promoted-by-surface-bubbles
#11
JOURNAL ARTICLE
Xiaoxue Song, Hui Yan, Yuqiao Zhang, Weiqiang Zhou, Shun Li, Jianming Zhang, Simone Ciampi, Long Zhang
Adherent bubbles at electrodes are generally treated as reaction penalties. Herein, in situ hydroxylation of indium tin oxide surfaces can be easily achieved by applying a constant potential of +1.0 V in the presence of bubbles. Its successful hydroxylation is further demonstrated by preparing a ferrocene-terminated film, which is confirmed by cyclic voltammetry and X-ray photoelectron spectroscopy.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38530667/easy-conversion-perovskite-fluorides-kco-1-x-fe-x-f-3-for-efficient-oxygen-evolution-reaction
#12
JOURNAL ARTICLE
Yilei Du, Genyan Hao, Tao Zhao, Dandan Li, Guang Liu, Dazhong Zhong, Jinping Li, Qiang Zhao
Herein, we report an easily oxidized Co-Fe perovskite fluoride as an efficient catalyst for the oxygen evolution reaction (OER). In situ Raman spectroscopy showed that the presence of F promotes reconstruction to form highly active (Co3+ Fe3+ )OOH, and the current density of 10 mA cm-2 can be achieved at the overpotential of only 118 mV in 1 M KOH aqueous solution. This work helps to understand the role of fluoride during the OER.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38530248/electrochemical-oxidative-c-c-bond-cleavage-of-methylenecyclopropanes-with-alcohols
#13
JOURNAL ARTICLE
Rakesh Kumar, Shiv Dutt, Prabal Banerjee
Herein, an electrochemical approach toward the ring opening functionalization of methylenecyclopropanes (MCPs) via C-C bond cleavage in the presence of alcohols is reported. The methodology avoids the usage of external oxidants and shows good functional group tolerance. The mechanistic studies suggest that the reaction proceeds via direct single electron oxidation of the C-C bond of MCPs followed by ring opening to form the desired product.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38530244/a-temperature-adjustable-in-situ-infrared-diffuse-reflectance-spectroscopy-system-for-catalysts
#14
JOURNAL ARTICLE
Weifeng Huang, Tao Chen, Jun Luo, Geer Su, Hang Wei
We introduce an innovative in situ infrared diffuse reflection rapid detection system, endowed with a temperature regulation function. This system is adept at conducting rapid infrared spectra scanning as well as simulating the catalytic environment of diverse reaction systems. The infrared absorption spectra of four kinds of Pt-based catalysts under vacuum conditions across a wide temperature spectrum ranging from -180 to 300 °C are obtained and analysed through IR correlation spectroscopy. A key finding is the notable variance in peak intensity within Pt/CeO2 /CNT catalysts, highlighting a robust adsorption capacity for oxygen-containing groups at lower temperatures and a marked desorption at higher temperatures...
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38529840/microalgae-as-a-potential-natural-source-for-the-green-synthesis-of-nanoparticles
#15
REVIEW
Ariana A Arteaga-Castrejón, Vivechana Agarwal, Sanghamitra Khandual
The increasing global population is driving the development of alternative sources of food and energy, as well as better or new alternatives for health and environmental care, which represent key challenges in the field of biotechnology. Microalgae represent a very important source material to produce several high-value-added bioproducts. Due to the rapid changes in the modern world, there is a need to build new materials for use, including those in the nanometer size, although these developments may be chronological but often do not occur at a time...
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38529790/an-organometallic-swap-strategy-for-bottlebrush-polymer-protein-conjugate-synthesis
#16
JOURNAL ARTICLE
Bin Liu, Jacob Rodriguez, Landon J Kilgallon, Wencong Wang, Yuyan Wang, Aiden Wang, Yutong Dai, Hung V-T Nguyen, Bradley L Pentelute, Jeremiah A Johnson
Polymer-protein bioconjugation offers a powerful strategy to alter the physical properties of proteins, and various synthetic polymer compositions and architectures have been investigated for this purpose. Nevertheless, conjugation of molecular bottlebrush polymers (BPs) to proteins remains an unsolved challenge due to the large size of BPs and a general lack of methods to transform the chain ends of BPs into functional groups suitable for bioconjugation. Here, we present a strategy to address this challenge in the context of BPs prepared by "graft-through" ring-opening metathesis polymerization (ROMP), one of the most powerful methods for BP synthesis...
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38529621/ionized-water-soluble-organic-nanosheets-with-light-ultrasound-dual-excitation-channels-for-efficient-killing-of-multidrug-resistant-bacteria
#17
JOURNAL ARTICLE
Yufan Gu, Dayong Jiang, Luoyi Wang, Guangpeng Gao, Xu-Hui Jin
A novel ionized heavy-atom-free two-dimensional organic nanosheet was prepared and exhibited highly selective generation of singlet oxygen under both light and ultrasound excitation. These ionized nanosheets displayed excellent dispersibility in water and enhanced singlet oxygen production efficiency compared to their non-assembled monomers. Antimicrobial experiments have revealed their potent bactericidal effects on drug-resistant E. coli and S. aureus under both visible light and ultrasound irradiation.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38529610/synthesis-of-cis-fused-cyclopentenone-pyrrolidine-scaffolds-via-sequential-aza-piancatelli-and-conia-ene-type-reactions-in-one-pot
#18
JOURNAL ARTICLE
Pooja R Solanke, Prakash Kumar, Prathama S Mainkar, Kiranmai Nayani, Srivari Chandrasekhar
A novel one-pot protocol that enables sequential execution of an aza-Piancatelli rearrangement and a Conia-ene type reaction has been developed under Lewis acid catalysis. Here, a combination of B(C6 F5 )3 and Cu(OTf)2 , triethylamine, and triphenylphosphine yielded a wide range of cis -fused cyclopentenone-pyrrolidine scaffolds in one pot with good yields and diastereoselectivity.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38529587/strongly-reducing-helical-phenothiazines-as-recyclable-organophotoredox-catalysts
#19
JOURNAL ARTICLE
Haru Ando, Hiroyoshi Takamura, Isao Kadota, Kenta Tanaka
Recyclable phenothiazine organophotoredox catalysts (PTHS 1-3, E 1/2 ox * = -2.34 to -2.40 V vs. SCE) have been developed. When the recycling performance was evaluated, PTHS-1 could be recovered at least four times without loss of its catalytic activity. These recyclable organophotoredox catalysts represent a promising tool for sustainable organic synthesis.
March 26, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38526752/correction-water-dispersible-donor-acceptor-donor-%C3%AF-conjugated-bolaamphiphiles-enabling-a-humidity-responsive-luminescence-color-change
#20
Tomoya Enjou, Shimpei Goto, Qiming Liu, Fumitaka Ishiwari, Akinori Saeki, Taro Uematsu, Yuka Ikemoto, Sora Watanabe, Go Matsuba, Kouichiro Ishibashi, Go Watanabe, Satoshi Minakata, Yoshimitsu Sagara, Youhei Takeda
Correction for 'Water-dispersible donor-acceptor-donor π-conjugated bolaamphiphiles enabling a humidity-responsive luminescence color change' by Tomoya Enjou et al. , Chem. Commun. , 2024, https://doi.org/10.1039/d3cc05749f.
March 25, 2024: Chemical Communications: Chem Comm
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