【文献速递】【Nchem】【2022年】【7-12月】

声明:本专栏主要对生命科学领域的一些期刊文章标题进行翻译,所有内容均由本人手工整理翻译。由于本人专业为生物分析相关,其他领域如果出现翻译错误请谅解。


自旋交叉的手性控制
The magnetic switching capabilities of transition-metal spin-crossover (SCO) complexes show potential as multifunctional switches for applications in information storage and processing. However, the photo-induced spin-crossover behaviour of Fe(II) complexes is not fully understood and thus not fully exploited. Now, using ultrafast circular dichroism spectroscopy, a symmetry-breaking twisting mode has been observed during the high-spin-state relaxation of FeII(4,4’-dimethyl-2,2’-bipyridine)3 — this molecule is shown on the cover undergoing photoexcitation. The relaxation of the high-spin state is also shown to be retarded through control of its configuration using enantiopure counterions.
过渡金属自旋交叉(SCO)复合物的磁性开关能力显示出作为信息存储和处理应用的多功能开关的潜力。然而,Fe(II)配合物的光致自旋交叉行为尚未完全了解,因此未得到充分利用。现在,使用超快圆二色光谱,在FeII(4,4'-二甲基-2,2'-联吡啶)3的高自旋态弛豫过程中观察到了对称破缺扭曲模式——该分子显示在封面上进行光激发。通过使用对映体纯抗衡离子控制其构型,也显示出高自旋状态的弛豫会延迟。
1.Chiral control of spin-crossover dynamics in Fe(II) complexes.
铁(II)复合物中自旋交叉动力学的手性控制。
2.Ion-pair reorganization regulates reactivity in photoredox catalysts.
离子对重组调控光氧化催化剂的反应性。
3.Controlled masking and targeted release of redox-cycling ortho-quinones via a C–C bond-cleaving 1,6-elimination.
通过C-C键断裂的1,6-消除法控制氧化还原循环正醌的掩蔽和定向释放。
4.Prebiotic synthesis and triphosphorylation of 3′-amino-TNA nucleosides.
3′-氨基-TNA核苷的预生物合成和三磷酸化。
5.Condensates in RNA repeat sequences are heterogeneously organized and exhibit reptation dynamics.
RNA重复序列中的凝结物是异质组织的,并表现出爬行动力学。
6.Accelerating symmetry-breaking charge separation in a perylenediimide trimer through a vibronically coherent dimer intermediate.
通过振子相干的二聚体中间物加速了苝二酰亚胺三聚体中的对称性破坏电荷分离。
7.Stabilization of hexazine rings in potassium polynitride at high pressure.
高压下多氮化钾中己唑环的稳定化。
8.Binding methane to a metal centre.
将甲烷与金属中心结合。
9.An autonomously oscillating supramolecular self-replicator.
一个自主振荡的超分子自我复制器。
10.Collisional excitation of HNC by He found to be stronger than for structural isomer HCN in experiments at the low temperatures of interstellar space.
在星际空间的低温实验中,发现He对HNC的碰撞激发比对结构异构体HCN更强。
11.Tunable acetylene sorption by flexible catenated metal–organic frameworks.
柔性连锁的金属有机框架对乙炔的可调控吸附。
12.Ultrafast proton-coupled isomerization in the phototransformation of phytochrome.
植物色素光转化过程中的超快质子耦合异构化。
13.O-GlcNAcylation modulates liquid–liquid phase separation of SynGAP/PSD-95.
O-糖基化调节SynGAP/PSD-95的液-液相分离。

平面的环对苯
Macrocycles made up of para-linked phenylene rings (the [n]CPPs) have attracted the attention of researchers because their unique conjugated structures result in interesting physical properties. Their strained topology makes it difficult to extend the aromatic system, but now a team led by Andreas Görling, Konstantin Y. Amsharov and Sabine Maier have shown that a planar π-extended [12]CPP can be produced using a bottom-up on-surface synthesis approach. The resulting nanographene macrocycle, shown on the cover of this issue, features an all-armchair edge, which leads to delocalized electronic states around the entire ring.
由对位连接的亚苯基环([n]CPP)组成的大环化合物引起了研究人员的注意,因为它们独特的共轭结构导致了有趣的物理性质。它们紧张的拓扑结构使得芳香系统难以扩展,但现在由Andreas Görling、Konstantin Y. Amsharov 和 Sabine Maier领导的团队表明,可以使用自下而上的表面上合成方法。由此产生的纳米石墨烯大环,如本期封面所示,具有全扶手椅边缘,导致整个环周围的离域电子态。
1.Planar π-extended cycloparaphenylenes featuring an all-armchair edge topology.
以全臂椅边缘拓扑结构为特征的平面π-扩展环芳烃。
2.Tunable and recyclable polyesters from CO2 and butadiene.
来自二氧化碳和丁二烯的可调整和可回收的聚酯。
3.Pathogenic bacteria remodel central metabolic enzyme to build a cyclopropanol warhead.
致病菌重塑中心代谢酶以建立环丙醇弹头。
4.A two-directional vibrational probe reveals different electric field orientations in solution and an enzyme active site.
双向振动探针揭示了溶液中不同的电场方向和一个酶活性部位。
5.Bifunctional sulfilimines enable synthesis of multiple N-heterocycles from alkenes.
双功能磺酰亚胺能从烯烃中合成多种N-杂环化合物。
6.Photocaged 5′ cap analogues for optical control of mRNA translation in cells.
用于光学控制细胞内mRNA翻译的光笼5′帽类似物。
7.Deep learning study of tyrosine reveals that roaming can lead to photodamage.
对酪氨酸的深度学习研究揭示了漫游可导致光损伤。
8.Nickel-catalysed asymmetric hydrogenation of oximes.
镍催化的肟类不对称氢化作用。
9.Taming phosphorus mononitride.
驯服单氮化磷。
10.Low-temperature liquid platinum catalyst.
低温液体铂金催化剂。
11.A multi-stage single photochrome system for controlled photoswitching responses.
用于控制光开关反应的多级单光铬系统。
12.Mechanism-based ligand design for copper-catalysed enantioconvergent C(sp3)–C(sp) cross-coupling of tertiary electrophiles with alkynes.
基于机制的配体设计,用于铜催化的三级电荷与炔烃的C(sp3)-C(sp)交叉耦合。
13.Functional DNA-based cytoskeletons for synthetic cells.
用于合成细胞的基于DNA的功能性细胞骨架。

植物到塑料变得甜美而简单
Realizing sustainable plastics requires cost-effective production from renewable feedstocks, good materials properties and end-of-life recycling options. Now, a team led by Jeremy S. Luterbacher has taken advantage of the natural structure of sugars to create polymers that may meet these stringent criteria. Trapping the cyclic and oxygen-rich structure of carbohydrates (shown as a white chemical structure on the cover) within the backbone of these materials dramatically simplifies the production from nonedible biomass, leads to useful properties, enables closed-loop chemical recycling from mixed-plastic waste streams and provides a degradation route back to sugars in the presence of water. The 3D-printed leaf shown on the cover is made from this thermoplastic.
实现可持续塑料需要使用可再生原料进行具有成本效益的生产、良好的材料特性和报废回收选择。现在,由Jeremy S. Luterbacher领导的团队利用糖的天然结构来制造可能满足这些严格标准的聚合物。将碳水化合物的环状富氧结构(在封面上显示为白色化学结构)捕获在这些材料的主链内,可显着简化非食用生物质的生产,产生有用的特性,能够从混合塑料废物流中进行闭环化学回收,并在有水存在的情况下提供回到糖的降解途径。封面上显示的3D打印叶子就是用这种热塑性塑料制成的。
1.Sustainable polyesters via direct functionalization of lignocellulosic sugars.
通过木质纤维素糖的直接功能化实现可持续聚酯。
2.Mimicry of the proton wire mechanism of enzymes inside a supramolecular capsule enables β-selective O-glycosylations.
模仿超分子囊内酶的质子线机制,实现了β-选择性的O-糖基化。
3.Functionalizing aromatic compounds with optical cycling centres.
用光学循环中心使芳香族化合物功能化。
4.Chemoenzymatic synthesis of fluorinated polyketides.
氟化聚酮类化合物的化学酶法合成。
5.Selective visible-light photocatalysis of acetylene to ethylene using a cobalt molecular catalyst and water as a proton source.
利用钴分子催化剂和水作为质子源,对乙炔制乙烯进行选择性的可见光光催化。
6.A general design of caging-group-free photoactivatable fluorophores for live-cell nanoscopy.
用于活体细胞纳米镜的无笼罩基团的光活化荧光团的一般设计。
7.Conformational and functional changes of the native neuropeptide somatostatin occur in the presence of copper and amyloid-β.
在铜和淀粉样物质存在的情况下,本地神经肽体蛋白的形态和功能发生了变化。
8.Time-resolved terahertz–Raman spectroscopy reveals that cations and anions distinctly modify intermolecular interactions of water.
时间分辨的太赫兹-拉曼光谱显示,阳离子和阴离子明显地改变了水的分子间相互作用。
9.Mechanically axially chiral catenanes and noncanonical mechanically axially chiral rotaxanes.
机械性轴向手性链烷烃和非经典的机械性轴向手性轮烷。
10.Structure-specific amyloid precipitation in biofluids.
生物流体中结构特定的淀粉沉淀。
11.Excited-state intermediates in a designer protein encoding a phototrigger caught by an X-ray free-electron laser.
X射线自由电子激光器捕捉到的编码光触发器的设计者蛋白质中的激发态中间物。
12.Highly conducting single-molecule topological insulators based on mono- and di-radical cations.
基于单基和双基阳离子的高导电性单分子拓扑绝缘体。
13.Exploiting the sp2 character of bicyclo[1.1.1]pentyl radicals in the transition-metal-free multi-component difunctionalization of [1.1.1]propellane.
利用双环[1.1.1]戊基的sp2特性,对[1.1.1]丙二醇进行无过渡金属的多组分双功能化。
14.Light-activated tetrazines enable precision live-cell bioorthogonal chemistry.
光活化的四嗪类使精确的活细胞生物正交化学成为可能。

分子间库仑衰变没有界限
During intermolecular Coulombic decay (ICD), photoexcited molecules relax while ionizing their neighbouring molecules. This is usually observed in weakly bound systems — such as clusters and hydrogen-bonded systems — because ICD is efficient when intermolecular interactions are active. Now Sajeev, Aravind and colleagues have shown that ICD can occur between unbound pyridine molecules excited at ambient-light intensities, implying that soft ionization could occur naturally in astrophysical environments that feature such molecules with π-electron systems. The cover depicts this process occurring.
在分子间库仑衰变(ICD)过程中,光激发分子在电离相邻分子的同时松弛。这通常在弱结合系统(如团簇和氢键系统)中观察到,因为当分子间相互作用活跃时,ICD是有效的。现在,Sajeev、Aravind及其同事表明,ICD可以发生在在环境光强度下激发的未结合的吡啶分子之间,这意味着软电离可以在具有π电子系统的此类分子的天体物理环境中自然发生。封面描述了这个过程的发生。
1.Ambient-light-induced intermolecular Coulombic decay in unbound pyridine monomers.
环境光诱导的非结合吡啶单体的分子间库仑衰变。
2.In situ electrochemical recomposition of decomposed redox-active species in aqueous organic flow batteries.
水中有机流动电池中分解的氧化还原活性物种的原位电化学重组。
3.Phase-specific RNA accumulation and duplex thermodynamics in multiphase coacervate models for membraneless organelles.
无膜细胞器的多相共渗模型中的特定RNA积累和双工热力学。
4.Palladium-catalysed selective oxidative amination of olefins with Lewis basic amines.
钯催化的烯烃与路易斯碱胺的选择性氧化胺化。
5.Different timescales during ultrafast stilbene isomerization in the gas and liquid phases revealed using time-resolved photoelectron spectroscopy.
利用时间分辨光电子能谱技术揭示了气相和液相中超高速链烷烃异构化的不同时间尺度。
6.Filling of a water-free void explains the allosteric regulation of the β1-adrenergic receptor by cholesterol.
无水空隙的填充解释了胆固醇对β1-肾上腺素能受体的异生调节。
7.Prebiotic synthesis of α-amino acids and orotate from α-ketoacids potentiates transition to extant metabolic pathways.
来自α-酮酸的α-氨基酸和乳清酸的益生菌合成增强了向现存代谢途径的过渡。
8.Synthesis of a low-valent Al4+ cluster cation salt.
低价Al4+簇状阳离子盐的合成。
9.σ–σ Stacked supramolecular junctions.
σ-σ堆积的超分子连接。
10.The ribosome stabilizes partially folded intermediates of a nascent multi-domain protein.
核糖体稳定新生多域蛋白的部分折叠中间物。
11.Photochemical single-step synthesis of β-amino acid derivatives from alkenes and (hetero)arenes.
烯类和(杂)烯类的光化学单步合成β-氨基酸衍生物。
12.Palladium-catalysed construction of butafulvenes.
钯催化构建丁香烯。
13.Genome-based discovery and total synthesis of janustatins, potent cytotoxins from a plant-associated bacterium.
基于基因组的Janustatins的发现和全合成,这是一种来自植物相关细菌的强效细胞毒素。

Topologically interesting cyclic polymers can be prepared by metathesis polymerization, but their precise synthesis has suffered from the catalyst’s vulnerability and inseparability. Now, Tae-Lim Choi and colleagues have designed a silica-supported ruthenium catalyst to overcome these limitations. With the help of customized glassware (a cyclic polymer dispenser), the use of this quarantined catalyst enables a continuous circular process of in situ polymerization, polymer separation, and catalyst recovery, giving a scalable process for the synthesis of cyclic polycyclopentene. The cover shows cyclopentene monomers undergoing ring-expansion metathesis polymerization to form cyclic polymers.
拓扑有趣的环状聚合物可以通过易位聚合制备,但它们的精确合成受到催化剂的脆弱性和不可分离性的影响。现在,Tae-Lim Choi及其同事设计了一种二氧化硅负载的钌催化剂来克服这些限制。在定制玻璃器皿(环状聚合物分配器)的帮助下,使用这种隔离催化剂可以实现原位聚合、聚合物分离和催化剂回收的连续循环过程,从而为环状聚环戊烯的合成提供可扩展的过程。封面展示了环戊烯单体正在经历扩环复分解聚合形成环状聚合物。
1.Standardized excitable elements for scalable engineering of far-from-equilibrium chemical networks.
远离平衡化学网络的可扩展工程的标准化可激发元素。
2.Structure, reactivity and catalytic properties of manganese-hydride amidate complexes.
锰-氢酰胺复合物的结构、反应性和催化特性。
3.Scalable and continuous access to pure cyclic polymers enabled by ‘quarantined’ heterogeneous catalysts.
通过"隔离的"异质催化剂实现纯环状聚合物的可扩展和连续访问。
4.Photoinduced inverse vulcanization.
光诱导反硫化物。
5.Nanopore microscope identifies RNA isoforms with structural colours.
纳米孔显微镜识别具有结构色彩的RNA异构体。
6.Lewis acid-assisted reduction of nitrite to nitric and nitrous oxides via the elusive nitrite radical dianion.
刘易斯酸辅助下的亚硝酸盐通过难以捉摸的亚硝酸盐自由基二元体还原为硝酸和亚硝酸。
7.Total synthesis of structurally diverse pleuromutilin antibiotics.
结构多样的胸腺素抗生素的全合成。
8.Molecular interactions of FG nucleoporin repeats at high resolution.
高分辨率的FG核孔蛋白重复序列的分子相互作用。
9.Excitation energy transfer and vibronic coherence in intact phycobilisomes.
完整的植物蛋白体中的激发能量转移和光子相干。
10.A modular XNAzyme cleaves long, structured RNAs under physiological conditions and enables allele-specific gene silencing.
一种模块化的XNA酶在生理条件下裂解长的、结构化的RNA,并使等位基因特异性沉默。
11.Inverse hydride shuttle catalysis enables the stereoselective one-step synthesis of complex frameworks.
逆向氢化物穿梭催化使复杂框架的立体选择性单步合成成为可能。
12.An autonomous portable platform for universal chemical synthesis.
一个用于通用化学合成的自主便携式平台。
13.Formation of a super-dense hydrogen monolayer on mesoporous silica.
中孔硅石上超密氢气单层的形成。
14.Biosynthesis and characterization of fuscimiditide, an aspartimidylated graspetide.
夫西地肽的生物合成和特征,一种天冬酰亚胺糖肽。

难得一见的POMs
Radioisotopes can be very challenging to study because of their scarcity, rapid decay, toxicity or cost. Now, a team led by Gauthier J.-P. Deblonde has shown that only microgram quantities of these isotopes are required to generate radioisotope–polyoxometalate (POM) complexes that can be both spectroscopically and structurally characterized. The image on the cover shows a photograph, taken under ultraviolet light irradiation, of single crystals in crystallography oil of complexes between the rare radioactive 248Cm isotope and polyoxotungstate ligands.
由于放射性同位素的稀缺性、快速衰变、毒性或成本,研究它们可能非常具有挑战性。现在,由Gauthier J.-P. Deblonde领导的团队表明,仅需微克量的这些同位素即可生成放射性同位素-多金属氧酸盐(POM)复合物,这种复合物可以在光谱和结构上进行表征。封面图片显示了在紫外光照射下拍摄的稀有放射性248Cm同位素与多氧钨配体之间的络合物结晶油中的单晶照片。
1.Polyoxometalates as ligands to synthesize, isolate and characterize compounds of rare isotopes on the microgram scale.
以多氧金属为配体,合成、分离和表征微克级稀有同位素化合物。
2.Aldehyde-catalysed carboxylate exchange in α-amino acids with isotopically labelled CO2.
用同位素标记的二氧化碳催化α-氨基酸中的羧酸盐交换。
3.Mass spectrometry captures biased signalling and allosteric modulation of a G-protein-coupled receptor.
质谱法捕捉到G蛋白偶联受体的偏向信号和变构调制。
4.Controlling anisotropic properties by manipulating the orientation of chiral small molecules.
通过操纵手性小分子的方向来控制各向异性的特性。
5.Biosynthesis-guided discovery reveals enteropeptins as alternative sactipeptides containing N-methylornithine.
生物合成引导下的发现揭示了肠肽是含有N-甲基鸟氨酸的替代性活性肽。
6.Recyclable and malleable thermosets enabled by activating dormant dynamic linkages.
通过激活休眠的动态链接实现可回收和可塑的热固性材料。
7.Intersystem crossing in the entrance channel of the reaction of O(3P) with pyridine.
O(3P)与吡啶反应的入口通道中的系统间交叉。
8.Post-translational backbone-acyl shift yields natural product-like peptides bearing hydroxyhydrocarbon units.
翻译后的骨架-酰基转移产生了含有羟基烃单元的天然产品样肽。
9.Practical synthesis of the therapeutic leads tigilanol tiglate and its analogues.
治疗性替吉兰醇及其类似物的实用合成。
10.Machine learning overcomes human bias in the discovery of self-assembling peptides.
机器学习克服了人类在发现自组装肽方面的偏见。
11.Bending a photonic wire into a ring.
将光子线弯曲成环状。
12.Synthesis and single-molecule imaging reveal stereospecific enhancement of binding kinetics by the antitumour eEF1A antagonist SR-A3.
合成和单分子成像揭示了抗肿瘤eEF1A拮抗剂SR-A3的结合动力学的立体特异性增强。
13.Circumventing the stability problems of graphene nanoribbon zigzag edges.
规避石墨烯纳米带之字形边缘的稳定性问题。
14.Diastereo- and enantioselective synthesis of compounds with a trifluoromethyl- and fluoro-substituted carbon centre.
具有三氟甲基和氟替代碳中心的化合物的非对映和对映选择性合成。