IR/Raman光谱和DFT研究二(2,4,8,10-四甲基-9-甲氧基丙酰基二吡咯-3-烷基)甲烷的Co(Ⅱ)自组装体  

Trend study of bis(2,4,8,10-tetramethyl-9-methoxy-propionyl pyrrole 2-3-alkyl)Methane Co(Ⅱ)self-assembled body

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作  者:李伟[1] 王振东[1] 杨锋[1] 

机构地区:[1]武汉科技学院化学工程学院,湖北武汉430073

出  处:《武汉科技学院学报》2008年第11期1-3,共3页Journal of Wuhan Institute of Science and Technology

基  金:国家自然科学基金20701030

摘  要:配位驱动的自组装在超分子化学中扮演着重要的角色,本文测试了二(2,4,8,10-四甲基-9-甲氧基丙酰基二吡咯-3-烷基)甲烷的Co(Ⅱ)自组装体的IR和Raman光谱,并用DFT-B3LYP方法选用三个基组组合(基组1:6-31G(d);基组2:C,H,O,N:6-31G(d),Cu:Lan12dz;基组3: C,H,O,N:6-31G(d);Cu:6-31+G(d))研究了它们基态的构型并计算了其IR和Raman光谱。通过与XRD结果比较发现:计算的键长比实验键长短0.027-0.055A,使用Lan12dz基组可以明显提高精度。计算光谱与实验光谱能较好地吻合,偏差在20cm-1以内。通过与二(2,4-二甲基二吡咯-3-烷基)甲烷的Zn(Ⅱ)配合物的光谱比较发现,Cα和Cβ上的H原子被CH3或丙酸酯基所取代后,其对应的振动模式最大位移了8-10cm-1。Coordination-driven self-assembly in supramolecular chemistry plays an important role, the paper tested bis (2,4,8,10 - tetramethyl -9 - methoxy-propionyl pyrrole 2 -3 - alkyl) A n of Co(Ⅱ) self-assembled body of IR and Raman spectrum, and DFT-B3LYP method selected combinations of three basis sets (base group 1:6-31G (d); based Group 2: C, H, O, N: 6-31G (d), Cu: Lanl2dz;-based Group 3: C, H, O, N :6-31G (d); Cu :6-31 + G (d)) were studied by ground-state configuration and calculate its IR and Raman spectroscopy. Compared with the XRD results found that: the calculation of bond length than the experimental bond length of 0.027-0.055A, use Lanl2dz-based group can obviously improve the accuracy. Calculated spectra and experimental spectra can better match, the error in less than 20cm^-1. With bis (2,4 - dimethyl pyrrole -3 - alkyl) methane Zn (Ⅱ) complexes spectra comparison, Cα and Cβ on CH3 or H atoms have been replaced by propionate base after , and its corresponding vibration mode of the maximum displacement of 8-10cm^- 1.

关 键 词:IR RAMAN光谱 密度泛函(DFT) 分子自组装 

分 类 号:TP393[自动化与计算机技术—计算机应用技术]

 

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