JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
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IF 3.119
Jingzhou Guo,Junwei Yang,Yuanzuo Zou,Yuan Pu,Dan Wang
The 9,9-Dihexyl-2,7-dibromofluorene (F6-Br) is an important intermediate product in the synthesis of functional polyfluorenes for various applications. The solvent/antisolvent method has been one of the efficient methods to purify organic molecules for advanced applications, for which the solubility data of solutes in different solvents are the basis of purification. In this work, the solubility values of F6-Br in 12 kinds of solvents in the temperature range of 283.15–323.15 K and atmospheric pressure were determined by using the isothermal saturation method. The selected solvents were methanol, ethanol, acetonitrile, n-butanol, isopropanol, dichloromethane, dimethyl sulfoxide, 1,4-dioxane, ethyl acetate, n-hexane, tetrahydrofuran, chloroform, and toluene. The measured solubility data were correlated by the modified Apelblat equation. The maximum value of mean square deviation was 3.95 × 10–3, which retains practical guiding significance. The purification of F6-Br via solvent/antisolvent precipitation processing was demonstrated, and the involvement of rotating packed-bed-based technology significantly intensified the process efficiency, which showed promising application value for industrial production.
研究领域:
化学工程
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材料科学
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有机化学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
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2024
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IF 4.2
Yunxing Li,Zhiqiang Xiong,Yikai Feng,Hang Jiang,Yajuan Sun,Man-Hin Kwok
Microcapsules have attracted significant attention in academia and industry due to their unique properties for protecting and controlling the release of active substances. However, based on water-insoluble biopolymers, developing a straightforward approach to prepare microcapsules with improved biocompatibility and functional shells remains a great challenge. In this study, zein, a water-insoluble protein, is employed to prepare robust microcapsules facilely using oil-in-aqueous ethanol Pickering emulsions as templates. First, the emulsion template is stabilized by hydrophobic silica nanoparticles with in situ surface modification of tannic acid. The zein is then precipitated at the interface in a controlled manner using antisolvent approach to obtain silica/tannic acid/zein (STZ) microcapsules. It is found that the concentration of zein and the presence of tannic acid played a significant role in the formation of STZ microcapsules with well-defined morphology and a robust shell. The uniform deposition of zein on the surface of template droplets is facilitated by the interactions between tannic acid and zein via hydrogen bond and electrostatic force. Finally, the resulting STZ microcapsules showed super resistance to ultraviolet (UV) radiation and high temperature for the unstable, lipophilic, and active substance of β-carotene.
研究领域:
材料科学
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化学工程
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生物技术
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Chemistry
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2025
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IF 20.2
Zheng Nanlong,Cao Songqi,Zhang Tianhao,Huo Peihao,Hu Conglan,Liu Huanyu,Guo Ruoyao,Yan Wenchao,Zheng Jiayin,Jiang Xiaofan,Zhu Zhenyu,Sun Junliang,Jiang Hong,Bian Zuqiang,Fu Yongping,Liu Zhiwei
Zero-dimensional (0D) metal halides, which feature discrete metal halide octahedra interspersed with large organoammonium cations, are the building blocks of halide perovskites. The optical properties of these materials make them promising candidates in light-emitting devices. However, developing their general design principles remains challenging. Here we report an antisolvent incorporation approach that transforms a broad range of two-dimensional tin iodide perovskites into 0D structures. This approach accommodates diverse organic cations and antisolvent molecules and is extendable to germanium and lead analogues. We show that enhancing the structural rigidity in Sn-based octahedra—modulated by organic packing—increases the radiative recombination rate while decreasing the non-radiative recombination rate, achieving near-unity photoluminescence quantum yield. Ge- and Sn-based structures exhibit large Stokes shifts and microsecond-scale triplet lifetimes due to localized excited states, while their Pb-based counterpart shows faster recombination via triplet–singlet mixing, supported by theoretical calculations. This work offers a versatile synthetic platform for 0D metal halides and deepens our current understanding of excited-state dynamics in halide perovskites.
研究领域:
材料科学
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光物理
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无机化学
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半导体材料
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光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）