Structural and Photophysical Properties of a Cd(II) Coordination Polymer Based on Mixed Aromatic Ligands: A Combined Experimental and Theoretical Study

Structural and Photophysical Properties of a Cd(II) Coordination Polymer Based on Mixed Aromatic Ligands: A Combined Experimental and Theoretical Study
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基于混合芳香配体的 Cd(II) 配位聚合物的结构和光物理性质:实验与理论相结合的研究

DOI:
10.1007/s10904-017-0537-5
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发表时间:
2017-04
期刊:
J Inorg Organomet Polym
影响因子:
--
通讯作者:
Can‑Hua Zhou
Can‑Hua Zhou
中科院分区:
其他
文献类型:
--
作者:
Can‑Hua Zhou

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合成了一种新型的基于混合芳香配体的一维Cd(II)配位聚合物(CP),并用x射线衍射、热重分析和光谱分析对其进行了表征。Hirshfeld表面分析的指纹图谱表明,C-H··O、π··π、C-H··π和H··H分子间相互作用稳定了CP的一维晶体结构。利用时变密度泛函理论研究了CP的结构和光物理性质,计算结果与实验数据吻合较好。研究发现,电子从CP的第一单重态激发态弛豫时存在配体与配体之间的电荷转移特征。CP的弱荧光可能是芳香配体前沿分子轨道(FMOs)的能量交错和Cd(II)的d10构型的满足所致。在此,该CP通过调节芳香配体的FMOs的能级,显示出作为一种潜在的可调谐发光传感器。
A novel one-dimensional Cd(II) coordination polymer (CP) based on mixed aromatic ligands was synthesized and characterized by X-ray diffraction, thermogravimetric analysis and spectroscopic analyses. Fingerprint plots in Hirshfeld surface analysis illustrate that the one-dimensional crystal structure of the CP is stabilized by C–H···O, π···π, C–H···π, and H···H intermolecular interactions. The structural and photophysical properties of the CP were then investigated by time-dependent density functional theory methods, and computational results well reproduced the experimental data. The combined investigations found a ligand-to-ligand charge transfer character during the electrons relax from the first singlet excited1 state of the CP. The weak fluorescence of CP could be resulted from the energy interlacing of the frontier molecular orbitals (FMOs) of aromatic ligands and the fulfilled d10 configuration of Cd(II). Herein, this CP exhibits as a potential tunable luminescent sensor by adjusting the energy levels of the FMOs of aromatic ligands.
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