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本研究将传统的2-苯基吡啶配体进行改性,用富电子的噻吩基团代替苯基,得到有机配体2-噻吩基吡啶(L1),并以L1合成铱(Ⅲ)配合物C1,而基于2-苯基吡啶(L2)配体的铱(Ⅲ)配合物C2也被合成得到,以用做性质对比;随后通过质谱(MS)、核磁共振谱(NMR)以及傅里叶变换红外光谱(FT-IR)对产物C1和C2进行结构表征,并利用紫外可见光吸收光谱(UV-Vis)以及光致发光光谱(PL)等测试手段,对比C1与C2的光谱性质,利用噻吩基代替苯基后,UV-Vis的吸收范围扩大,PL的最大发射峰发生了红移。 相似文献
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近年来,构筑具有新颖结构和优良性能的金属-有机骨架配位聚合物已经引起了学术界研究者的广泛关注。本文应用核磁共振氢谱、碳谱、DEPT135谱、同核化学位移相关谱(~1H-~1H COSY)、异核单量子相关谱(~1H-~(13)C HSQC)以及多健异核多量子相关谱(~1H-~(13)C HMBC)等核磁共振研究方法对一个新的联苯羧酸配体化合物的结构进行了研究,并对~1H NMR、~(13)C NMR谱的信号进行了全归属。 相似文献
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采用多步偶联的方式合成了基于氧杂蒽骨架的配体及相应的镍金属配合物,通过核磁共振谱、碳谱及元素分析对配合物及其配体进行结构表征分析,利用单晶衍射阐述了配合物的立体结构.采用该配合物与含铝助剂配合使用能有效催化乙烯寡聚,活性最高可达到5×106g/(mol·h),产品组成以C4为主. 相似文献
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The redox-active ligand 1-(2-pyridylazo)-2-acenaphthequinol (PAAL) and its zinc complex Zn(PAAL)2 were isolated and characterized by single crystal X-ray diffraction, 1H NMR, UV–Vis spectra and TGA, as well as their fluorescence and third-order nonlinear optical properties were preliminary investigated. The electronic structure of the complex is examined by cyclic voltammogram, while density functional theory calculations also support the redox-active nature of the PAAL ligand. 相似文献
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An investigation into the shifts induced in the NMR spectra of some derivatives of substituted phenols by tris(dipivalomethanato)europium and tris(dipivalomethanato)praseodymium is reported. The phenol derivatives were studied to ascertain the possible utility of the shift reagents as an aid in the analysis of phenolformaldehyde resins by NMR spectroscopy, and to gain information on induced shifts with molecules having more than one possible co-ordination site. 相似文献
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A novel class of polymer–metal complexes was prepared by the condensation of a polymeric ligand with transition‐metal ions. The polymeric ligand was prepared by the addition polymerization of thiosemicarbazides with toluene 2,4‐diisocyanate in a 1 : 1 molar ratio. The polymeric ligand and its polymer–metal complexes were characterized by elemental analysis, thermogravimetric analysis, Fourier transform infrared spectroscopy, and 13C‐NMR and 1H‐NMR spectroscopy. The geometries of the central metal ions were determined by electronic spectra (UV–visible) and magnetic moment measurement. The antibacterial activities of all of the synthesized polymers were investigated against Bacillus subtilis and Staphylococcus aureus (Gram positive) and Escherichia coli and Salmonella typhi (Gram negative). These compounds showed excellent antibacterial activities against these bacteria with the spread plate method on agar plates, and the number of viable bacteria were counted after 24 h of incubation period at 37°C. The antibacterial activity results revealed that the Cu(II) chelated polyurea showed a higher antibacterial activity than the other metal‐chelated polyureas. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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The solution behaviour of the square-planar gold(III) complex [Au(dien)Cl]Cl(2) (dien = 1,5- diamino-3-azapentane) was investigated by (13)H and (13)C NMR spectroscopy. We have found that (1)H NMR spectra of [Au(dien)Cl] Cl(2) are characterised by exchange behaviour over the whole pH range, and some exchange effects are also seen in (13)C NMR spectra of the deprotonated hydroxo derivative of the complex in alkaline solution. An exchange rate of > 378 s(-1) was determined from (1)H NMR spectra at pH *(2) (coalescence temperature (40)C degrees ). In slightly acidic solutions of the complex, (1)H chemical shifts are in accordance with the known deprotonation of the central amine group of the complexed diethylenetriamine ligand. In (13)C NMR spectra, two separate sets of resonances are observed for the chloro and the hydroxo complex of gold(III) diethylenetriamine. The hydroxo complex [Au(dien-H)OH(+) shows exchange effects in (13)C NMR spectra. Variable temperature studies show the carbon atoms next to the central secondary amine to be inequivalent and each present in two different environments that are in intermediate to fast exchange on the NMR time-scale. 相似文献
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Summary Neutral palladium complexes bearing β-ketoiminato ligand Pd[CH3C(O)CHC(NAr)CH3](PPh3)(Me)(I Ar=α-napthyl, II Ar= fluorenyl) were activated by MAO to give catalytic system able to polymerize methyl acrylate (MA), thus producing atactic
high molecular weight poly(methyl acrylate). Both catalysts exhibited catalytic activities for the copolymerization of norbornene
with MA. The polymers were characterized by 13C NMR, GPC and FT-IR spectra. The analyses of the product by 1H NMR and 13C NMR spectra gave the verification of random vinyl addition copolymer. The composition of the copolymers was controlled by
varying the monomer feed ratio. 相似文献