Structure, Luminescence, and Two-Dimensional Correlation Infrared Spectroscopy of Two Sm/3-Methylbenzoic Acid Complexes

Abstract

Two samarium complexes with 3-methylbenzoic acid (HMeBA = 3-methylbenzoic acid) have been hydrothermally synthesized directly: Sm(MeBA)₃ 1 and Sm₂(MeBA)₆(o-Phen)₂ 2 (o-Phen = o-phenanthroline). 1 is a one-dimensional helical chain structure. In particular, due to the existence of the second ligand-o-Phen, which includes three aromatic rings and has very large steric hindrance, 2 is a zero-dimensional binuclear oligomer and is further assembled into an infinite chain, two-dimensional net and three-dimensional supramolecular structure by the weak interactions of π–π and C-H···π. Additionally, in order to explore the structural characteristic, luminescence and 2D-IR correlation spectroscopy containing temperature-induced structural variation and magnetism-induced structural variation are used.

Supplementary material is available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Keywords:

• luminescence
• samarium/3-methylbenzoic acid complexes
• second ligand
• 2D-IR correlation spectroscopy

Acknowledgments

This work is supported by grants from the Youth Foundation of Hebei United University (z201103), and Science and Technology Development Fund of Fuzhou University (2010-XQ-09). The authors thank Prof. Sun Suqin (Tsinghua University, Beijing, China) for providing the 2D IR correlation analysis software.