报告时间：2014年8月14日（星期四）下午2:00  

　　报告地点：航天催化楼306会议室  

　　报告人：Dr. Esen Ercan Alp

Advanced Photon Source, Argonne National Laboratory, Argonne，USA

　　报告人简介：Dr. Esen Ercan Alp长期从事同步辐射表征技术的开发和应用研究，已在Science, Inorg Chem, Angew Chem Int Ed, PNAS, JACS等高水平期刊上发表论文上百篇。 

　　Research Experience: 

　　M？ssbauer Spectroscopy; X-ray absorption spectroscopy, Polarized XANES; Nuclear resonant scattering of synchrotron radiation; Nanomaterials for catalysis and energy applications

　　报告摘要：

　　This is the 56th anniversary of the discovery of M？ssbauer effect, and the 30th anniversary first observation of nuclear resonant scattering using synchrotron radiation. In the last two decades, with availability of synchrotron sources worldwide, the nature of the M？ssbauer spectroscopy has changed in many ways. For example, experiments in studying lattice dynamics of materials show substantial modification as a function of pressure and temperature. Hence, when a new class of materials are discovered, inelastic x-ray scattering (IXS) and nuclear resonant inelastic x-ray scattering (NRIXS) can help measure changes in sound velocity, shear velocity, specific heat, Gruneisen constant, and elastic constants. Measurement of combination of synchrotron M？ssbauer hyperfine parameters with identifiable signature of vibrational mode of a particular ligand makes this technique powerful for catalysis studies.  

　　There are now three usable beamlines at the APS. They have a unique combination of high-pressure, high and low temperature, and x-ray diffraction. Inelastic nuclear resonant scattering and synchrotron M？ssbauer spectroscopy (SMS) for Kr, Fe, Eu, Dy and Sn nuclear resonances. Recent research results will be presented. Selected publications: 

　　1)      "Observation of the Fe-CN and Fe-CO vibrations in the active site of [NiFe] hydrogenase by nuclear resonance vibrational spectroscopy" Angew. Chem. Int. Ed. 52, 724 (2013).  

　　2)      "Nuclear resonance vibrational spectroscopic and computational study of high-valent diiron complexes relevant to enzyme intermediates" PNAS 110, 6275 (2013).  

　　3)      "Nuclear resonance vibrational spectra of five-coordinate imidazole-ligated iron(II) porphyrinates" Inorg. Chem. 51, 1359 (2012).  

　　4)      "Heme-protein vibrational couplings in cytochrome c provide a dynamic link that connects the heme-iron and the protein surface," PNAS 109, 8896 (2012).  

　　5)      "Synchrotron-derived vibrational data confirm unprotonated oxo ligand in myoglobin compound II" JACS 130, 1816 (2008).  

　　报告联系人：15室 孙汇（89161）