A new family of Pt(II) isocyanide complexes with NNC-type pincer ligands: Correlation between structural features and aggregation-induced emission

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-03-11 DOI:10.1016/j.optmat.2025.116926

Elizaveta V. Durova, Ekaterina E. Galenko, Andrey A. Shtyrov, Mikhail N. Ryazantsev, Kristina S. Kisel, Julia R. Shakirova, Sergey P. Tunik

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Abstract

Four square-planar [(NNC)Pt(CN-Xyl)]OTf complexes bearing a novel tridentate ligands (NNC-1/4) were synthesized and fully characterized. Photophysical properties of the obtained compounds were investigated in acetonitrile solution, solid state and aqueous dispersion. It was shown that the complexes in their monomeric form exhibit moderate phosphorescence in the visible and NIR regions with a clear correlation of emission maxima with the nature of the cyclometalated fragment in the pincer ligand. Complexes with substituted phenyl ring as the C-coordinated fragment (NNC-1/3)Pt(CN-Xyl) demonstrate aggregation induced emission (AIE) with a strong red shift of emission bands in the solid state and water dispersions, the magnitude of which correlates with the packing mode of the molecules, i.e., with the number of platinum metal centers taking part in formation of aggregates. The complex containing benzothienyl C-coordinated moiety (NNC-4)Pt(CN-Xyl) shows no AIE effects that is in agreement with its structural features, which do not allow formation of the aggregates with short Pt–Pt contacts. All correlations between the photophysical behavior of the complexes, their composition and structural parameters were also confirmed by quantum-chemical calculations based on the analysis of the model systems containing monomers, dimers and trimers of the starting complexes.

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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.