Chinese Chemical Letters最新文献

{"title":"Dual-defect engineering of catalytic cathode materials for advanced lithium-sulfur batteries","authors":"Na Li ,&nbsp;Wenxue Wang ,&nbsp;Peng Wang ,&nbsp;Zhanying Sun ,&nbsp;Xinlong Tian ,&nbsp;Xiaodong Shi","doi":"10.1016/j.cclet.2024.110731","DOIUrl":"10.1016/j.cclet.2024.110731","url":null,"abstract":"<div><div>Sluggish conversion reaction kinetics and spontaneous shuttle effect of lithium polysulfides (LiPSs) are deemed as the two big mountains that hinder the practical application of lithium-sulfur batteries (LSBs). Herein, dual-defect engineering strategy is implemented by introducing boron-doping and phosphorus-vacancy sites with MoP@NC composite as the precursor. Based on the experimental characterizations and theoretical calculations, B-MoP_1-x@NC-based electrode presents low oxidation potential, high lithium diffusivity, small Tafel slope and strong adsorption capability for polysulfides, which is beneficial to enhance the adsorption capability for LiPSs, reduce the lithium diffusion energy barriers and Gibbs free energy for the conversion reactions of LiPSs. As demonstrated, the corresponding Li-S/B-MoP_1-x@NC batteries can remain high reversible capacity of 753 mAh/g at 0.5 C after 300 cycles, and keep a stable capacity of 520 mAh/g at 0.5 C after 100 cycles even at the high-loading content of 5.1 mg/cm². According to the results of in-situ UV–vis spectra, the satisfactory battery performance majorly originates from the existence of dual-defect characteristics in B-MoP_1-x@NC catalyst, which effectively promotes the conversion reaction kinetics of LiPSs, and restrains the shuttle behavior of LiPSs. The key ideas of this work will enlighten the development of catalytic cathode materials for sulfur-based secondary batteries.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 3","pages":"Article 110731"},"PeriodicalIF":9.4,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143318148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular engineering of dibenzo-heterocyclic core based hole-transporting materials for perovskite solar cells","authors":"Yajie Yang,&nbsp;Mengde Zhai,&nbsp;Haoxin Wang,&nbsp;Cheng Chen,&nbsp;Ziyang Xia,&nbsp;Chengyang Liu,&nbsp;Yi Tian,&nbsp;Ming Cheng","doi":"10.1016/j.cclet.2024.110700","DOIUrl":"10.1016/j.cclet.2024.110700","url":null,"abstract":"<div><div>Heterocyclic compounds play an important role in organic hole transport materials (HTMs) for perovskite solar cells (PSCs). Herein, a series of linear D-<em>π</em>-D HTMs (O<img>CBz, S-CBz, SO2-CBz) with different dibenzo-heterocycles core (dibenzofuran, dibenzothiophene, dibenzothiophene sulfone) were designed and synthesized, and their applications in PSCs were investigated. The intrinsic properties (CV, UV–vis, hole mobility and conductivity) were systematically investigated, demonstrating that all three materials are suitable HTMs for planar n-i-p type PSCs. Benefiting from the excellent hole mobility and conductivity, good film forming ability, and outstanding charge extraction and transport capability of S-CBz, FAPbI₃-based PSCs using S-CBz as HTM achieved a PCE of 25.0 %, which is superior to that of Spiro-OMeTAD-based PSCs fabricated under the same conditions (23.9 %). Furthermore, due to the interaction between S and Pb²⁺, S-CBz-based PSC devices exhibited improved stability. This work demonstrates that dibenzothiophene-based architectures are promising candidates for high-performance HTMs in perovskite solar cell architectures.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 5","pages":"Article 110700"},"PeriodicalIF":9.4,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Significantly boosting circularly polarized luminescence by synergy of helical and planar chirality","authors":"Fengying Ye ,&nbsp;Ming Hu ,&nbsp;Jun Luo ,&nbsp;Wei Yu ,&nbsp;Zhirong Xu ,&nbsp;Jinjin Fu ,&nbsp;Yansong Zheng","doi":"10.1016/j.cclet.2024.110724","DOIUrl":"10.1016/j.cclet.2024.110724","url":null,"abstract":"<div><div>To get large dissymmetric factor (<em>g</em>_lum) of organic circularly polarized luminescence (CPL) materials is still a great challenge. Although helical chirality and planar chirality are usual efficient access to enhancement of CPL, they are not combined together to boost CPL. Here, a new tetraphenylethylene (TPE) tetracycle acid helicate bearing both helical chirality and planar chirality was designed and synthesized. Uniquely, synergy of the helical chirality and planar chirality was used to boost CPL signals both in solution and in helical self-assemblies. In the presence of octadecylamine, the TPE helicate could form helical nanofibers that emitted strong CPL signals with an absolute <em>g</em>_lum value up to 0.237. Exceptionally, followed by addition of <em>para</em>-phenylenediamine, the <em>g</em>_lum value was successively increased to 0.387 due to formation of bigger helical nanofibers. Compared with that of TPE helicate itself, the CPL signal of the self-assemblies was not only magnified by 104-fold but also inversed, which was very rare result for CPL-active materials. Surprisingly, the interaction of TPE helicate with xylylenediamine even gave a gel, which was transformed into suspension by shaking. Unexpectedly, the suspension showed 40-fold stronger CPL signals than the gel with signal direction inversion each other. Using synergy of the helical chirality and planar chirality to significantly boost CPL intensity provides a new strategy in preparation of organic CPL materials having very large <em>g</em>_lum value.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 5","pages":"Article 110724"},"PeriodicalIF":9.4,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting the first CH bond activation of propane on rod-like V/CeO2 catalyst by photo-assisted thermal catalysis","authors":"Xiangyang Ji ,&nbsp;Yishuang Chen ,&nbsp;Peng Zhang ,&nbsp;Shaojia Song ,&nbsp;Jian Liu ,&nbsp;Weiyu Song","doi":"10.1016/j.cclet.2024.110719","DOIUrl":"10.1016/j.cclet.2024.110719","url":null,"abstract":"<div><div>Crystalized CeO₂ structures were typically considered potential photocatalysts due to their great capacity to alter the active sites’ size and ability to absorb light. However, the controllable fabrication of well-defined hierarchical structures of CeO₂ with high reactive facets is significant and challenging. Herein, a series of CeO₂ supports including hierarchical flower-like (F-CeO₂), ball-like (B-CeO₂), cube-like (C<img>CeO₂), and rod-like CeO₂(R-CeO₂) supports were prepared by hydrothermal method (B-CeO₂, R-CeO₂ and C<img>CeO₂) or ice-bath method (F-CeO₂) respectively. V atoms were selected as the active atoms and loaded on these supports. Their structure-activity relationship in photo-assisted thermal propane dehydrogenation (PTPDH) was investigated systematically. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N₂ adsorption-desorption isotherms, and Fourier transform infrared spectrum. Results show that R-CeO₂ support exhibits the biggest surface area thus achieving the best dispersion of VO_x species. UV–vis spectrum and photoluminescence spectrum indicate that V/F-CeO₂ has the best light adsorption property and V/R-CeO₂ has the best carrier migration capacity. The activity tests demonstrate that the V/R-CeO₂ has the largest net growth rate and the V/F-CeO₂ has the biggest relative growth ratio. Furthermore, the non-thermal effect was confirmed by the kinetic method, which lowers the propane reaction orders, selectively promoting the first C<img>H bond activation. The light radiation TPSR experiment confirmed this point. DFT calculations show a good linear relationship between the energy barrier and the exchanged electron number. It inspires the design of high-reactive facets for boosting the intrinsic activity of the C<img>H bond in photo-assisted thermal chemical processes.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 5","pages":"Article 110719"},"PeriodicalIF":9.4,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance optimization of aqueous Zn/MnO2 batteries through the synergistic effect of PVP intercalation and GO coating","authors":"Shilong Li ,&nbsp;Ming Zhao ,&nbsp;Yefei Xu ,&nbsp;Zhanyi Liu ,&nbsp;Mian Li ,&nbsp;Qing Huang ,&nbsp;Xiang Wu","doi":"10.1016/j.cclet.2024.110701","DOIUrl":"10.1016/j.cclet.2024.110701","url":null,"abstract":"<div><div>Manganese dioxide (MnO₂) electrode material possesses the advantages of high energy density, structural diversity and high modification potential. This allows it become one of the important cathodes for aqueous zinc ion battery. However, the applications are limited by the poor electrical conductivity, narrow layer spacing and the ease of dissolution. Herein, we prepare MnO₂[email protected] composites by the co-modification of polyvinylpyrrolidone (PVP) pre-insertion layer and graphene oxide (GO) self-assembly layer. The Zn//MnO₂[email protected] cells deliver a discharge specific capacity of 442 mAh/g at a current density of 0.2 A/g. It also maintains 100 % capacity for 1000 times cycling at 1 A/g. The assembled soft package batteries demonstrate superior flexibility and adaptability under different bending conditions.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 3","pages":"Article 110701"},"PeriodicalIF":9.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143318150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial-confinement combustion strategy enabling free radicals chemiluminescence direct-measurement in flame-retardant mechanism","authors":"Xuan Song,&nbsp;Teng Fu,&nbsp;Yajie Yang,&nbsp;Yahan Kuang,&nbsp;Xiuli Wang,&nbsp;Yu-Zhong Wang","doi":"10.1016/j.cclet.2024.110699","DOIUrl":"10.1016/j.cclet.2024.110699","url":null,"abstract":"<div><div>Generally, gaining fundamental insights into chain processes during the combustion of flame-retardant polymers relies on the qualitative and quantitative characterization of key chain carriers. However, polymer combustion processes based on conventional solid-fuel combustion strategies, due to the high coupling of pyrolysis, combustion, soot formation and oxidation, exhibit relatively high complexity and poor flame stability, and lead to a huge obstacle to the use of optical diagnostics. Herein, a spatial-confinement combustion strategy, which can produce a special staged flame with multi-jets secondary wave, is devised to provide a highly decoupled combustion environment. Glowing soot particles are therefore decoupled from main chemiluminescence region and confined to the flame tip to provide a well-controlled, optical-thin test environment for combustion diagnostic. Based on this strategy, a multi-nozzle-separation (MNS) burner is designed and fabricated, and the combustion processes associated with four model compounds, PVC, PS, PP/TBBA blends and PP/RP blends are investigated by spontaneous spectral diagnosis, and the chemiluminescence fingerprint of key diatomic/triatomic intermediates (such as OH, CH, C₂, ClO, Br₂, and PHO) are clearly observed. This encouraging result means that the strategy of spatial-confinement combustion we proposed shows promising prospect in many subjects associated with combustion chain regulation, such as efficient design of flame retardants.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 5","pages":"Article 110699"},"PeriodicalIF":9.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multidimensional droplet manipulation on superhydrophobic surfaces using acoustic tweezers","authors":"Guifeng Wen,&nbsp;Zheyuan Zhong,&nbsp;Yue Fan,&nbsp;Xuelin Tian,&nbsp;Shilin Huang","doi":"10.1016/j.cclet.2024.110672","DOIUrl":"10.1016/j.cclet.2024.110672","url":null,"abstract":"<div><div>On-demand droplet manipulation plays a critical role in microfluidics, bio/chemical detection and micro-reactions. Acoustic droplet manipulation has emerged as a promising technique due to its non-contact nature, biocompatibility and precision, circumventing the complexities associated with other methods requiring surface or droplet pretreatment. Despite their promise, existing methods for acoustic droplet manipulation often involve complex hardware setups and difficulty for controlling individual droplet amidst multiple ones. Here we fabricate simple yet effective acoustic tweezers for in-surface and out-of-surface droplet manipulation. It is found that droplets can be transported on the superhydrophobic surfaces when the acoustic radiation force surpasses the friction force. Using a two-axis acoustic tweezer, droplets can be maneuvered along arbitrarily programmed paths on the surfaces. By introducing multiple labyrinthine structures on the superhydrophobic surface, individual droplet manipulation is realized by constraining the unselected droplets in the labyrinthine structures. In addition, a three-axis acoustic tweezer is developed for manipulating droplets in three-dimensional space. Potential applications of the acoustic tweezers for micro-reaction, bio-assay and chemical analysis are also demonstrated.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 5","pages":"Article 110672"},"PeriodicalIF":9.4,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring interatomic active sites for highly selective electrocatalytic biomass conversion reaction","authors":"Xuan Liu,&nbsp;Qing Li","doi":"10.1016/j.cclet.2024.110670","DOIUrl":"10.1016/j.cclet.2024.110670","url":null,"abstract":"","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 4","pages":"Article 110670"},"PeriodicalIF":9.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hierarchical zeolites stabilized cobalt(II) as propane dehydrogenation catalyst: Enhanced activity and coke tolerance via alkaline post-treatment","authors":"Kun Yang ,&nbsp;Anhui Li ,&nbsp;Peng Zhang ,&nbsp;Guilin Liu ,&nbsp;Liusai Huang ,&nbsp;Yumeng Fo ,&nbsp;Luyuan Yang ,&nbsp;Xiangyang Ji ,&nbsp;Jian Liu ,&nbsp;Weiyu Song","doi":"10.1016/j.cclet.2024.110663","DOIUrl":"10.1016/j.cclet.2024.110663","url":null,"abstract":"<div><div>Transition metal cobalt exhibits strong activation capabilities for alkanes, however, the instability of Co sites leads to sintering and coke deposition, resulting in rapid deactivation. Hierarchical zeolites, with their diverse pore structures and high surface areas, are used to effectively anchor metals and enhance coke tolerance. Herein, a post-treatment method using an alkaline solution was employed to synthesize meso‑microporous zeolite supports, which were subsequently loaded with Co species for propane dehydrogenation catalyst. The results indicate that the application of NaOH, an inorganic base, produces supports with a larger mesopore volume and more abundant hydroxyl nests compared to TPAOH, an organic base. UV–vis, Raman, and XPS analyses reveal that Co in the 0.5Co/SN-1–0.05 catalyst is mainly in the form of tetrahedral Co²⁺, which effectively activates C<img>H bonds. In contrast, the 0.5Co/S-1 catalyst contains mainly Co₃O₄ species. Co²⁺ supported on hierarchical zeolites shows better propane conversion (58.6 %) and propylene selectivity (&gt;96 %) compared to pure silica zeolites. Coke characterization indicates that hierarchical zeolites accumulate more coke, but it is mostly in the form of easily removable disordered carbon. The mesopores in the microporous zeolite support help disperse the active Co metal and facilitate coke removal during dehydrogenation, effectively preventing deactivation from sintering and coke coverage.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 5","pages":"Article 110663"},"PeriodicalIF":9.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Halogenated benzothiadiazole-based conjugated polymers as efficient photocatalysts for dye degradation and oxidative coupling of benzylamines” [Chinese Chemical Letters 33 (2022) 2736–2740]","authors":"Chu Chu,&nbsp;Yuancheng Qin,&nbsp;Cailing Ni,&nbsp;Jianping Zou","doi":"10.1016/j.cclet.2024.110616","DOIUrl":"10.1016/j.cclet.2024.110616","url":null,"abstract":"","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 2","pages":"Article 110616"},"PeriodicalIF":9.4,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}