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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Spectral properties of new N,N '-bis-alkyl-1,4,6,8-naphthalenediimide complexes
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Spectral properties of new N,N '-bis-alkyl-1,4,6,8-naphthalenediimide complexes

机译:新的N,N'-双烷基-1,4,6,8-萘二酰亚胺配合物的光谱性质

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摘要

The photophysical properties of two N,N-bis-alkyl-1,4,6,8-naphthalenediimide (DCN1 and DCN2) have been studied in chloroform and N,N-dimethylformamide solvents. The ability of DCN2 in N,N-dimethylformamide to detect metal cations have been monitored by the fluorescence emission spectroscopy. It has been shown that the fluorescent intensity is very sensitive to the concentration of Fe3+ cations. The reaction of iodine with N,N-bis-alkyl-1,4,6,8-naphthalenediimide in chloroform solution have been investigated by spectrophotometric method. The results indicate the formation of two CT-complexes [(DCN1)I]I-+.(3)- and [(DCN2)I]I-+(3)- at donor:acceptor molar ratio of 1:2. The [(DCN1)I]I-+.(3)- shows the characteristic absorptions of I-3(-) ion at 290 and 360 nm while the charge-transfer transition of [(DCN2)I]I-+.(3) occurs at 310 nm. Three characteristic bands at the far infrared region in each iodine complex are observed around 135, 105 and 85 cm(-1) due to v(as) (I-I), v(s) (I-I) and delta(I-3(-)), respectively with C-2v symmetry. The values of the complex formation constant, K, and the absorptivity, epsilon have been calculated. (c) 2005 Elsevier B.V. All rights reserved.
机译:在氯仿和N,N-二甲基甲酰胺溶剂中研究了两种N,N-双烷基-1,4,6,8-萘二酰亚胺(DCN1和DCN2)的光物理性质。 N,N-二甲基甲酰胺中DCN2检测金属阳离子的能力已通过荧光发射光谱法进行了监测。已经表明,荧光强度对Fe 3+阳离子的浓度非常敏感。用分光光度法研究了碘与N,N-双烷基-1,4,6,8-萘二酰亚胺在氯仿溶液中的反应。结果表明在供体:受体摩尔比为1:2时形成了两个CT复合物[(DCN1)I] I-+。(3)-和[(DCN2)I] I-+(3)-。 [(DCN1)I] I-+。(3)-显示了290和360 nm处I-3(-)离子的特征吸收,而[(DCN2)I] I-+。( 3)在310 nm处发生。由于v(as)(II),v(s)(II)和delta(I-3(-),在每个碘配合物中的远红外区域,在135、105和85 cm(-1)处观察到三个特征带。 )),分别具有C-2v对称性。已经计算出复合物形成常数K和吸收率ε的值。 (c)2005 Elsevier B.V.保留所有权利。

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