New ruthenium(II) bipyridine complex bearing 2-aminophenylbenzimidazole: Synthesis, spectral characterization and optical properties

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2018-10-01 DOI:10.1016/j.optmat.2018.06.052

Shadia A. Elsayed , Eman A. Gaml , M.A. Nasher

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引用次数: 10

Abstract

The new bipyridine-based ruthenium(II) complex [Ru(bpy)₂(Hapbim)]²⁺ (bpy being 2,2′-bipyridine, and Hapbim is 2-aminophenylbenzimidazole) was synthesized and characterized. On the basis of elemental analysis, spectroscopic techniques (FTIR, ¹H NMR, UV-Visible), magnetic, conductivity and thermal analysis measurements, it was found that the Hapbim ligand coordinates to Ru(II) kernel in a neutral bidentate fashion through cyclic azomethine N of benzimidazole moiety along with the terminal nitrogen of the amino group forming six-membered chelate ring. Thin films of the Ru(II)-complex were prepared using thermal evaporation technique. The thin film structure was characterized using FTIR and X-Ray diffraction techniques. FTIR analysis revealed that the complex is chemically stable under both thermal evaporation and thermal annealing. The optical properties were studied by spectrophotometric measurements. The optical constants of the complex were calculated and it is found to have 1.5 eV band gap. Also, the effect of thermal annealing on the optical properties of the complex is studied. Annealing of the complex thin films increased the values of the dispersion parameters and decreased the value of the band gap.

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含2-氨基苯基苯并咪唑的新型钌(II)联吡啶配合物的合成、光谱表征及光学性质

合成并表征了新型联吡啶基钌(II)配合物[Ru(bpy)2(Hapbim)]2+ (bpy为2,2′-联吡啶，Hapbim为2-氨基苯基苯并咪唑)。通过元素分析、光谱分析(FTIR、1H NMR、uv -可见)、磁性、电导率和热分析等测试，发现habim配体通过苯并咪唑部分的环亚甲胺N与氨基末端氮形成六元螯合环，以中性双齿方式与Ru(II)核配位。采用热蒸发技术制备Ru(II)配合物薄膜。利用FTIR和x射线衍射技术对薄膜结构进行了表征。红外光谱分析表明，该配合物在热蒸发和热退火条件下均具有稳定的化学性质。用分光光度法对其光学性质进行了研究。计算了配合物的光学常数，发现其带隙为1.5 eV。研究了热退火对配合物光学性质的影响。复合薄膜的退火增加了色散参数值，减小了带隙值。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.

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