試題詳解

20. How many of the following statement(s) about characterization techniques is(are) correct? (3 pts) (a) Paramagnetic compounds can be characterized by EPR (ESR).
 (b) Powder samples cannot generate diffraction patterns while using X-ray as the light source.
(c) To determine protein structures via cryoEM crystalline materials are required.
 (d) Infrared spectroscopy is a useful tool to determine bond strengths of organic functional groups. (e) All NMR active compounds do not have unpaired electron(s).
(f) X-ray photoelectron spectroscopy (XPS) is a surface-se sensitive quantitative spectroscopic technique.
 (g) X-ray absorption spectroscopy (XAS) can be used to determine the oxidation state of metal complexes.
(A)6
(B) 5
(C) 4
(D) 3
(E) 2