基本信息
浏览量:2
职业迁徙
个人简介
Research interests
The aim of my research is the development of new methods and applications of ultra-sensitive, high-resolution laser spectroscopy to study the structure and dynamics of molecules and clusters. The understanding of intramolecular primary processes in polyatomic molecules at the fully quantum dynamical level remains among the most challenging research questions in physics and chemistry, with applications also in biology and environmental sciences. High-resolution spectroscopy is among the most powerful tools in advancing such research and it is crucial in this context to develop new and ever more powerful spectroscopic experiments.
In my work in Zürich, I successfully developed new experimental techniques for the infrared laser spectroscopy of gas-phase molecules. These techniques have been applied to the study of intramolecular vibrational energy redistribution, vibrational mode-specific tunnelling of hydrogen-bonded clusters and stereomutation dynamics.
In one class of experiments, pulsed IR laser systems are used to excite vibrational transitions and a second, subsequent UV laser pulse to ionise the excited molecules. Ionisation detection of IR excitation has been coupled with a mass spectrometer thus adding a second dimension to optical spectroscopy. In another class of experiments, the extreme sensitivity of cavity-ring-down (CRD) spectroscopy (effective absorption path lengths of several km) is combined with the very high resolution of continuous wave (cw) diode lasers (100 kHz). This technique has been applied to measure accurately the transition strengths and weak overtone transitions of molecules (nitrous oxide, methane) and of hydrogen-bonded clusters (HF dimer).
So far in Sheffield, I have studied molecular association by FTIR, Raman spectroscopy and high-level quantum-chemical calculations. For this purpose, I set up a very sensitive stimulated Raman experiment with photoacoustic detection ('PARS'). Among the intermolecular forces, the hydrogen-bond X-H...Y is particularly relevant. A hydrogen bond usually exhibits a characteristic 'red'-shift (shift to lower wavenumbers) of the X-H stretching vibration, but more unconventional 'blue'-shifting hydrogen bonds also occur and have become a hot topic of current research.
In Sheffield, I have recently studied some unusual, "blue-shifting" hydrogen bonds (e.g., CHCl3...SO2 in the gas phase and open HCOOH structures in liquid formic acid) by theory and experiment.
Awards
Ruzicka Prize in Chemistry (2002) for "contributions to high-resolution spectroscopy, in particular experimental development of mass - and isotope-selective spectroscopy and theoretical description of high-resolution two-photon spectroscopy".
Nernst-Haber-Bodenstein Prize of the Deutsche Bunsengesellschaft für Physikalische Chemie (2004).
研究兴趣
论文共 189 篇作者统计合作学者相似作者
按年份排序按引用量排序主题筛选期刊级别筛选合作者筛选合作机构筛选
时间
引用量
主题
期刊级别
合作者
合作机构
Matthias Elinkmann, Sarah Reuter, Alexander Köhrer, C. Derrick Quarles Jr,Michael Sperling, Michael Hippler,Uwe Karst
Lebensmittelchemieno. S1 (2024)
Taija L Fischer,Margarethe Bödecker,Sophie M Schweer,Jennifer Dupont,Valéria Lepère,Anne Zehnacker-Rentien,Martin A Suhm,Benjamin Schröder, Tobias Henkes,Diego M Andrada, Roman M Balabin,Haobam Kisan Singh,
Physical chemistry chemical physics : PCCPno. 33 (2023): 22089-22102
biorxiv(2023)
Nature Communicationsno. 1 (2023): 1-12
ISRAEL JOURNAL OF CHEMISTRYno. 7-8 (2023)
The Chlamydomonas Sourcebookpp.413-442, (2023)
Biological chemistryno. 5 (2023): 399-415
加载更多
作者统计
合作学者
合作机构
D-Core
- 合作者
- 学生
- 导师
数据免责声明
页面数据均来自互联网公开来源、合作出版商和通过AI技术自动分析结果,我们不对页面数据的有效性、准确性、正确性、可靠性、完整性和及时性做出任何承诺和保证。若有疑问,可以通过电子邮件方式联系我们:report@aminer.cn