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Synthesis of Oxalate Peroxo-uranyl Complex in situ by Photoreaction
WEI Wenqi, LIU Chunli
Acta Scientiarum Naturalium Universitatis Pekinensis    2020, 56 (3): 399-405.   DOI: 10.13209/j.0479-8023.2020.016
Abstract893)   HTML    PDF(pc) (4875KB)(141)       Save
[NH3(CH2)2NH3]3[(UO2)2O2(C2O4)4]·4H2O (1), [NH3(CH2)2NH2(CH2)2NH3]2[(UO2)2O2(C2O4)4]·2H2O (2) and [NH3(CH2)2NH2(CH2)2NH3]2[(UO2)2O2(C2O4)4] (3) were synthesized in situ under room temperature and laboratory lamp condition, using 1,2-diaminoethane and 2,2'-diaminodiethylamine separately as templates. Structures and properties were characterized by single-crystal X-ray diffraction, Raman spectra, powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA). The dihedral angle of U-O2-U in 1 and 2 is 180°, which deviates from the natural angle of peroxide. The peroxide bond length of 2 and 3 is shorter than that of the reported peroxide, and the bond lenth of 2 is close to superoxide bond length. However, both valence and Raman spectra indicated that 2 and 3 are peroxide bonds.
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The Effect of Observing Others’ Lives on the Perceived Tolerance of Pain
WEI Wenqi;WANG Lei;QIAO Lingsi;LI Chen
Acta Scientiarum Naturalium Universitatis Pekinensis    2015, 51 (5): 976-982.   DOI: 10.13209/j.0479-8023.2015.094
Abstract1147)      PDF(pc) (388KB)(283)       Save
Based on social learning and social comparison theories, the authors investigated whether the exposure to the successful or miserable lives of others could influence participants’ pain tolerance. Results consistently showed that people who were exposed to the successful or miserable lives of others reported higher tolerance of pain than people who were exposed to the ordinary lives of others. This result was present across different samples (employee sample in Experiment 1, and university student samples in Experiment 2), different priming methods (story of a waiter’s experience in Experiment 1, and a student’s life in Experiment 2). All these findings suggest that people can adaptively select different paths to regulate themselves in order to cope with pain.
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