ACS Nano
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2020
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IF 14.588
Suya Zhou,Shuo Yang,Xinwei Ding,Yuchong Lai,Huagui Nie,Yonggui Zhang,Dan Chan,Huan Duan,Shaoming Huang,Zhi Yang
The sluggish reaction kinetics at the cathode/electrolyte interface of lithium–sulfur (Li–S) batteries limits their commercialization. Herein, we show that a dual-regulation system of iron phthalocyanine (FePc) and octafluoronaphthalene (OFN) decorated on graphene (Gh), denoted as Gh/FePc+OFN, accelerates the interfacial reaction kinetics of lithium polysulfides (LiPSs). Multiple in situ spectroscopy techniques and ex situ X-ray photoelectron spectroscopy combined with density functional theory calculations demonstrate that FePc acts as an efficient anchor and scissor for the LiPSs through Fe···S coordination, mainly facilitating their liquid–liquid transformation, whereas OFN enables Li-bond interaction with the LiPSs, accelerating the kinetics of the liquid–solid nucleation and growth of Li2S. This dual-regulation system promotes the smooth conversion reaction of sulfur, thereby improving the battery performance. A Gh/FePc+OFN-based Li–S cathode delivered an ultrahigh initial capacity of 1604 mAh g–1 at 0.2 C, with an ultralow capacity decay rate of 0.055% per cycle at 1 C over 1000 cycles.
研究领域:
材料科学
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电化学
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能源存储
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DOI
PubMed
高影响因子
Nature Communications
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2026
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IF 18.1
Li Shuzhen,Xing Menghao,Xu Xifan,Hu Wenjing,Zhou Hang,Cao Xiaoyu
Organic crystalline systems combining dynamic photosalient effect with static photochromism represent a promising class of intelligent responsive materials. In this work, we construct a 3Abf-Ofn cocrystal (3Abf = 3-aminodibenzofuran, Ofn=Octafluoronaphthalene) through molecular co-assembly strategy. Upon UV irradiation, the 3Abf-Ofn undergoes a solid-state transformation involving volatile Ofn release and N-N coupling of 3Abf to bis(benzofuran-3-yl) azo compound (Bfa), triggering significant photochromism and photosalient behavior. This reaction pathway differs from conventional mechanisms such as photoisomerization or cycloaddition, representing an example of such photochemical process in organic cocrystals. Furthermore, the 3Abf-Ofn@PMMA composite film exhibits dynamically tunable fluorescence under UV irradiation: an initial enhancement of fluorescence upon photoactivation, followed by excitation wavelength-dependent emission (EWDE) and progressive fluorescence quenching, showing great potential for advanced anti-counterfeiting and information encryption applications. This work not only provides valuable insights for designing multifunctional, light-controlled organic luminescent materials but also offers complementary synthetic approaches to azo-aromatic compounds.
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Yunxiao Sang,Chen Feng,Min Liu,Ji-Na Hao,Quan Zhou,Shaoliang Lin,Weihua Zhang,Fang Wang
Rationally utilizing diverse noncovalent interactions to direct multicomponent chiral coassemblies is crucial for constructing circularly polarized luminescence (CPL) materials with high dissymmetry factor (glum) and precisely controlled emission colors and handedness, which are essential for advanced optical devices and display technologies. Herein, we show the programmable coassembly of fluorenylmethyloxycarbonyl (Fmoc)-conjugated phenylalanine (Phe) and pyrene derivatives (Py1 and Py2) with different alkyl spacer lengths, which shall form ternary coassemblies with metal ions, octafluoronaphthalene (OFN), or 1,2,4,5-tetracyanobenzene (TCNB) through coordination, arene-perfluoroarene, or charge transfer forces, to enhance and flexibly control the chiroptical properties. The binary assemblies of Phe/Py1 and Phe/Py2 display opposite CPL with glum values around 10–2. Strikingly, incorporating metal ions into the binary coassembly systems inverts the handedness of CPL and significantly amplifies the |glum| values (reaching up to 0.15). CPL properties of Phe/Py1–2 can be further controlled by coassembling with OFN and TCNB, achieving inverted handedness, tunable emission bands, and dissymmetry factors. This work provides insight into how diverse noncovalent forces drive multiple-constituent chiral coassembly through different pathways, which would be helpful for the development of highly efficient and significantly tuned CPL materials.
研究领域:
材料科学
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超分子化学
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光学材料
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手性光学性质
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纳米技术
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
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IF 8.4
Shishi Shao,Jiaqiang Zhao,Wei Wang,Hanbing Nie,Yan Jie Li,Xuepeng Zhang,Cheng Zhi Huang,Peng Fei Gao
Host-guest doping room-temperature phosphorescence (RTP) materials have showed excellent potential for ultra-sensitive detection due to its bright luminescence in presence of trace guests. However, the inherent signal fluctuation of solid-state sensors restricts their widespread applications. Herein we constructed a simple internal standard method to overcome the signal fluctuation problem in RTP spectral analysis. Ultralong organic RTP can be obtained by using 1,4-dichlorobenzene (DCB) as a host and trace gaseous NL as a guest through the host-guest doping strategy. In this study, a dual-emission ratiometric phosphorescent probe pyrene (Py)/pentachloropyridine (PCP)-DCB was constructed by using the Py/PCP system fabricated via melt-casting as the reference afterglow and using the DCB as the stimuli-responsive unit of gaseous NL. This probe can be used for visual identification and content detection of NL in commercial mothballs. The ratio of phosphorescence intensity (I485/I595) was linearly related to the mass of added NL (mNL) within the range of 0.05–1.45 mg in this ratiometric RTP platform, and had a low detection limit of 0.012 mg. Furthermore, the NL content of five commercially available mothballs with different NL content was detected by this Py/PCP-DCB platform, and it had good performance compared to the gas chromatography (GC) analysis results.
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高影响因子
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