在二甲基硫氧化物中确定单个氧量子产量的方法
Meng Kou1, Feng Qin2, Zhiguo Zhang2
1Research Center for Crystal Materials, State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Functional Crystal Materials, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, People's Republic of China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Analytica chimica acta
|December 6, 2025
概括
在二甲基硫氧化物 (DMSO) 中精确的单氧量子产量 (ФΔ) 确定需要谨慎的时间. 这项研究确定了反应终点,指导DMSO吸收和化学探针方法的最佳测量窗口.
科学领域:
- 摄影化学的使用.
- 化学动力学 化学动力学
- 频谱学是一种光谱学.
背景情况:
- 单片氧 (1O2) 是一种具有广泛应用的重要反应性氧物种.
- 单个氧量子产量 (ФΔ) 量化了染料的生成效率.
- 现有的FΔ测量方法使用光发光或反应性.
研究的目的:
- 根据二甲基硫氧化物 (DMSO) 和O2之间的反应来确定FΔ的先前提出的方法的适用性.
- 识别和描述DMSO-O2反应中的反应终点.
- 在DMSO中建立可靠的方法来准确确定FΔ.
主要方法:
- 在1O2生成时监测DMSO的吸收频谱变化.
- 研究激发功率密度对DMSO-O2反应的影响.
- 在O2和DMSO的存在下分析化学探针的相对降解率.
主要成果:
- DMSO-1O2反应表现出一个终点,其表示光谱吸收达到平原.
- 达到和的时间与激发功率密度成反比例,因此在此之前需要进行测量.
- 化学探测方法显示了一个拐点;在这个点之后应进行测量,以在DMSO中准确确定FΔ.
结论:
- 在DMSO中准确的FΔ测定需要选择特定于测量方法的适当时间窗口.
- 该研究提供了一种可靠的方法,用于在DMSO中进行可靠的FΔ测量.
- 了解反应终结是优化1O2生成效率研究的关键.
更多相关视频
相关概念视频
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
12.5K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
12.5K
Flame Photometry: Lab
815
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
815


