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相关概念视频

The Sulfur Cycle01:22

The Sulfur Cycle

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Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
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Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Structure and Nomenclature of Thiols and Sulfides02:17

Structure and Nomenclature of Thiols and Sulfides

4.5K
Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...
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Electrophilic Aromatic Substitution: Sulfonation of Benzene01:22

Electrophilic Aromatic Substitution: Sulfonation of Benzene

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Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
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Sulfate Attack on Concrete01:29

Sulfate Attack on Concrete

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Sulfate attack on concrete is a deterioration process characterized by a whitish discoloration beginning at the edges and corners, accompanied by cracking and spalling. This phenomenon occurs when sulfates react with the components of hardened concrete, forming compounds like calcium sulfate and calcium sulfoaluminate which occupy more space than the substances they replace, causing the concrete to expand and disrupt.
Sulfates from sources like soil, groundwater, or industrial effluents...
103
Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

5.9K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
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Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in PolyS-Divinylbenzene
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为可持续材料增加元素硫的附加值.

Zhengtie Huang1, Yuanxin Deng1, Da-Hui Qu1

  • 1Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China.

Chemistry (Weinheim an der Bergstrasse, Germany)
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PubMed
概括

富含硫的共聚合物为塑料提供了可持续的替代品,其多种合成方法可用于能源,光学和环境修复. 研究强调了它们在先进材料和设备中的潜力.

关键词:
基本硫元素的硫.富含硫的多聚合物共聚物增加价值的利用利用情况.

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Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
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Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
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科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学
  • 可持续化学 可持续化学

背景情况:

  • 富含硫的共聚合物是传统碳基塑料的可持续替代品.
  • 动态二硫化物键和高硫含量是这些有前途的材料的特点.
  • 2013年开发的反向火山化启动了各种合成策略.

研究的目的:

  • 审查最新的硫丰富共聚合物的合成策略.
  • 突出能源,光学,工程,环境修复和 triboelectric 纳米发电机的应用.
  • 提供对现场机遇和挑战的前性视角.

主要方法:

  • 探索各种聚合技术,包括热聚合和光诱导聚合.
  • 使用各种交叉连接剂,如默卡坦,环硫化物,氧和循环二硫化物.
  • 对硫和基于硫的反应进行材料合成的审查.

主要成果:

  • 合成的进步导致了在光学窗户,金属吸收和粘合剂中应用的材料.
  • 独特的电子特性使这些材料适合用于硫 (Li-S) 电池中的阴极.
  • 由于其电子特性,在 triboelectric 纳米发电机中展示了潜在的潜力.

结论:

  • 富含硫的共聚合物是具有广泛应用潜力的多功能可持续材料.
  • 对合成和性能的持续研究将推动储能领域及其他领域的创新.
  • 该领域为未来的发展带来了重大机遇和挑战.