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通过水热的方法制备了两个新的1,2,3-三唑羧酸铜配合物:[Cu(L1)2· 2H2O](1)和[Cu(L2)2]n(2)(HL1=4-苯基-1,2,3-三唑-1-乙酸,HL2=4-苯基-1,2,3-三唑-2-乙酸),并利用红外光谱、质谱(MS)、核磁共振氢谱(1 H NMR)、元素分析、X-射线单晶衍射、X-射线粉末衍射和热重分析进行了表征.晶体结构表明:配合物1中,每一个单核分子通过分子间氢键作用形成二维层状结构.配合物2中,铜原子通过与羧基上的氧原子采用顺-反双齿桥联,形成了二维的网状结构,进一步通过每层网状结构间的π-π堆积作用形成三维超分子结构.磁性测试结果表明配合物2在低温下表现为铁磁性相互作用. 相似文献
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Ultrafast dynamics of cationic electronic states of vinyl bromide by strong-field ionization-photofragmentation 下载免费PDF全文
Strong field ionization-photofragmentation(SFI-PF)with ultrafast pump–probe scheme is a powerful approach to study the dynamics of molecular cationic electronic states.Here we carry out a SFI-PF study on the cationic electronic states of vinyl bromide,C2H3Br.The yields of the parent C2H3Br+and the formation of the fragment(Br+,C2H+2 and C2H+3)ions have been measured at different pump–probe delay time.Analysis provides experimental evidence of A2A'–X2A' internal conversion of vinyl bromide cations which occurs in a time of about 220 fs,and the time of C2H3+ formation induced by the dissociation of the A2A' state around 300 fs.The study would add our knowledge of the behavior of electronic excited states of complex molecular cations. 相似文献
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