Synthesis, Structure And Photophysical Properties Of Series Rare Earth Coordinate Polymers

Six kinds of Ln³⁺ ions rare earth polymers and three with containing Ag+ ion the coordination polymer were synthesized by hydrothermal method. After X - single crystal diffraction, determined the determination of their molecular and crystal structure, molecular formula is as follows: (1) {[EuN(CH₂CO₂)₃(H₂O)₂]·H₂O}_n (7) [Ag (C₇H₅O₃)]_n (2) {[TbN(CH₂CO₂)₃(H₂O)₂]·H₂O}_n (8) [Ag¹Ag²(C₇H₃NO₄)]_n (3) {[SmN(CH₂CO₂)₃(H₂O)₂]·H₂O}_n (9) Na[Ag(C₆H₄O₂N)₂·(H₂O)₄] (4) {[GdN(CH₂CO₂)₃(H₂O)₂]·H₂O}_n (5) {[PrN(CH₂CO₂)₃(H₂O)₂]·H₂O}_n (6) {[NdN(CH₂CO₂)₃(H₂O)₂]·H₂O}_n Compound (1) - (8) are the match with 2D infinite structure polymers, compounds (9) is joined by hydrogen bonding of supramolecular complexes slots. And compounds (1) to (6) is structurally similar series polymers, of which only with Ln³⁺ ion by transformation, thus, for their formation conditions and contrast light provided some physical properties of convenience.Using Uv - Vis - NIR absorption, IR absorption, fluorescence excitation and emission spectrum, of all the compounds were also investigated. Discusses their light physical properties. The key point is to match the emission spectrum polymers are analyzed and discussed and identified, and combining it with the corresponding absorption spectroscopy and inspire spectra were a comparative analysis. Find Ln³⁺ match in polymers, the light is emitted in addition to mainly from organic conjugated ligands sensitivity, but also with the match in Ln³⁺ polymers hypercore and f-f interaction has certain track association, often can make Ln³⁺ ions inherent frequency happen displacement and fracturing glow.In addition, containing Ag⁺ ions from series with the polymers and supramolecular fluorescence analysis, the paper, can discover the Ag+ polymers possible phosphorescence launch, because ligands in a substituents effects, has destroyed was reduced.