Robert Jérôme, Turek Philippe, Bailleul Matthieu, Boudalis Athanassios K
Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504, F-67000 Strasbourg, France.
Institut de Chimie de Strasbourg (UMR 7177, CNRS-Unistra), Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, F-67081 Strasbourg, France.
Phys Chem Chem Phys. 2021 Sep 22;23(36):20268-20274. doi: 10.1039/d1cp03295j.
We built a broadband Electron Paramagnetic Resonance (EPR) spectrometer capable of field- and frequency sweep experiments under field-, microwave amplitude- and microwave frequency-modulation detection modes (HM, AM, and FM, respectively). The spectrometer is based on a coplanar waveguide (CPW) architecture, with the sample being deposited on top of the transmission line. We tested the functionality of this spectrometer by measuring a standard 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl (DPPH) sample, and complex (NBu)[Cu(μ-Cl)(μ-pz)Cl] (1), drop-casted on the CPW. Complex 1 had been previously studied by conventional X-band EPR spectroscopy (, 2020, , 12769-1784), and comparison with the past studies validated the functionality of the spectrometer and confirmed the stability of the sample upon deposition. Moreover, our results highlighted the importance of surface effects and of the orientation of the microwave magnetic component on the lineshapes of the recorded spectra.
我们构建了一台宽带电子顺磁共振（EPR）光谱仪，它能够在磁场、微波幅度和微波频率调制检测模式（分别为HM、AM和FM）下进行场扫和频率扫实验。该光谱仪基于共面波导（CPW）架构，样品沉积在传输线上方。我们通过测量滴铸在CPW上的标准2,2-二苯基-1-（2,4,6-三硝基苯基）肼（DPPH）样品和配合物（NBu）[Cu（μ-Cl）（μ-pz）Cl]（1）来测试该光谱仪的功能。配合物1此前已通过传统的X波段EPR光谱进行过研究（，2020，，12769 - 1784），与过去研究的比较验证了光谱仪的功能，并证实了样品在沉积后的稳定性。此外，我们的结果突出了表面效应以及微波磁场分量的取向对所记录光谱线形的重要性。
