Synthesis and photophysical studies of a new benzimidazole derivative and its zinc(II) complexes

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2023-11-03 DOI:10.1016/j.jlumin.2023.120286

YaN. Albrekht , V.F. Plyusnin , E.M. Glebov , M.S. Milutka , A.S. Burlov , Y.V. Koshchienko , V.G. Vlasenko , V.A. Lazarenko , L.D. Popov

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引用次数: 0

Abstract

The photochemical and photophysical properties of the new ligand N-[2-(5,6-dihydrobenzimidazo[1,2-c]quinazoline-6-yl)phenyl]-4-methylbenzolsulfamide (1) and its zinc complexes, namely [2-[(E)-[2-(1H-benzimidazol-2-yl)phenyl]iminomethyl]-N-(p-tolylsulfonyl)anilino]chloro-zinc (3) and acetoxy-[2-[(E)-[2-(1H-benzimidazol-2-yl)phenyl]iminomethyl]-N-(p-tolylsulfonyl)anilino]zinc (4) were studied using UV spectroscopy, time-resolved luminescence and stationary photolysis. Compound 1 combines the properties of Schiff bases and benzimidazole derivatives, both known as good luminophores. The structures of compounds in the crystalline state were determined by means of XRD. Ligand 1 demonstrates high photoluminescence quantum yields (PLQY) in solutions, while for the soluble zinc complex 3 it drops in an order of magnitude. PLQY in the solid state for all the compounds are moderate (0.2–0.3). For complex 3 the PLQY in the solid state is ca. 3 times higher than in solutions, demonstrating the effect of aggregation-induced enhancement of luminescence. The approach based on combining properties of the two classes of luminophores seems prospective for further development of luminescent materials.

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一种新型苯并咪唑衍生物及其锌（II）配合物的合成及光物理研究

新配体N-[2-（5,6-二氢苯并咪唑并[1，2-c]喹唑啉-6-基）苯基]-4-甲基苯甲硫酰胺（1）及其锌配合物的光化学和光物理性质，即[2-[（E）-[2-（1H-苯并咪唑-2-基）苯基]亚氨基甲基]-N-（对甲苯磺酰基）苯胺基]氯锌（3）和乙酰氧基-[2-[。化合物1结合了希夫碱和苯并咪唑衍生物的性质，两者都被称为良好的发光体。通过XRD测定了化合物在结晶状态下的结构。配体1在溶液中表现出高的光致发光量子产率（PLQY），而对于可溶性锌配合物3，它以一个数量级下降。所有化合物的固态PLQY都是中等的（0.2–0.3）。对于配合物3，固态PLQY大约是溶液中的3倍，表明了聚集诱导发光增强的效果。基于这两类发光体的组合性质的方法似乎对发光材料的进一步发展具有前景。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.