Solving new structures by X-ray crystallography requires both intensities and phases of structure factors of diffracted X-ray waves; however, measured diffraction patterns only give intensities (so-called "phase problem"). Therefore, experimental (de novo) phase determination methods including single or...
Synthesis and characterization of sulfonated block copolyimides derived from 4,4 -sulfide-bis(naphthalic anhydride) for proton exchange membranes. J. Appl. Polym. Sci. 2015, 132, 41501. [CrossRef] 30. Matsumoto, K.; Higashihara, T.; Ueda, M. Locally and densely sulfonated poly(ether ...