Hydrothermal Synthesis, Structural Characterization and Luminescent Property of a New 1-D Chain-like [Er(NC6H4O2)3(H2O)2]n

A total of five three-dimensional Ln-Fe coordination polymers (CPs) [(CH3)2NH][(CH3)2NH2][Ln2Fe(SO4)4(L)]·3H2O (Ln = Eu, 1; Dy, 2; Gd, 3; Sm, 4; Er, 5; H2L = tartaric acid) have been successfully synthesized under solvothermal conditions and characterized by infrared spectroscopy, thermogravimetric analysis, elemental analyses, luminescence, and magnetic properties. Structural analysis indicates that the frameworks of 1–5 are constructed from novel [Ln8Fe4] rings. In the strcutures of 1–5, LnIII and FeIII ions interconnect through O donors of sulfate anions to generate a one-dimensional chain, and the adjacent chains are joined together by ligand [L]2– to form a two-dimensional zonary plane, which is further bridged by ligand [L]2– to give a new topology and named as “ Xhd 1”. Magnetic properties of 2 and 3 were investigated using variable temperature magnetic susceptibility, and weak ferromagnetic exchange between the FeIII and LnIII ions has been established for the Gd derivative. Meanwhile, we also studied luminescence spectra and luminescence lifetimes of 1 and 4 in the solid state at room temperature. The luminescence lifetime of 1 is 0.98 ms, which is significantly longer than the values in the reported Eu3+ coordination polymers.

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“…The peak at 3442 cm –1 for 1 is due to the stretching vibration of O–H. The features are in agreement with the reported compounds …”

Section: Resultssupporting

confidence: 91%

Syntheses, Structures, Luminescence, and Magnetic Properties of a Series of Novel Coordination Polymers Constructed by Nanosized [Ln₈Fe₄] Rings

Cheng

Lin

et al. 2016

Crystal Growth & Design

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“…The bond lengths of Gd–O range from 2.260(3) to 2.779(4) Å, whereas the bond angles of O–Gd–O are between 64.65(10) and 154.56(11)°. All the bond lengths and bond angles are in accordance to the reported literature . Scheme a and b shows the coordination modes of IN – ligands in compound 1 : it is clearly showing that there exist two kinds of coordination modes in compound 1 , all the IN – ligands coordinate to Gd1 ions in a μ 3 ‐η 1 :η 1 mode, while one of the IN – ligands coordinates to Gd2 ions in a μ 1 ‐η 1 mode as a terminal ligand and the others are similar to Gd1.…”

Section: Resultssupporting

confidence: 84%

Solvothermal Synthesis, Crystal Structure, and Luminescent Properties of Three Heterometallic Lanthanide‐Transition‐Metal Frameworks Constructed from Three Types of CuBr Motifs

Lü

Liu

Lou

et al. 2017

Zeitschrift anorg allge chemie

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Three three‐dimensional (3D) heterometallic lanthanide‐transition‐metal (hetero‐Ln‐TM) compounds with the formula [Ln6(Cu4Br3)(Cu2Br2)2(Cu2Br)(IN)20(H2O)12]·2H2O [Ln = Gd (1), Ln = Sm (2), Ln = Eu (3)] based on the linkages of one‐dimensional Ln organic chain and CumBrn units were synthesized by mixing Ln2O3 with isonicotinic acid (HIN = pyridine‐4‐carboxylic acid) under hydrothermal condition. During the synthesis, two ligands were used: the isonicotinate (IN–) stabilizes the cluster and links the one‐dimensional Ln organic chains and CumBrn motif, whereas Br– anions play a very important role in the formation of the distinct CumBrn units. It is interesting that there are three different Cu‐Br motifs: a closed four‐membered ring [Cu2Br2] subunit, a linear [Cu2Br] subunit, an S‐sharp [Cu4Br3] subunit. Strong fluorescence of compounds 2 and 3 suggests an efficient energy transfer from the ligand to Eu3+ ions. The luminescent investigation indicates that 2 and 3 are excellent candidates for fluorescent materials.

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“…The parallel experiment indicates that, if the proportion of Ln 2 O 3 in initial reactants was reduced, the yield of products will be decreased. Furthermore, we have tried to replace ethylene glycol by ethanediamine and hope to obtain chiral compounds, but the comparative experiments indicate that only block-like crystals of [Ln(NC 6 H 4 O 2 ) 3 (H 2 O) 2 ] n were formed (unit cell: a = 20.2688 Å, b = 11.6055 Å, c = 9.8653 Å, α = 90°, β = 115.626°, γ = 90°) . Compounds 1 – 6 could be easily obtained under solvothermal synthesis and have good reproducibility.…”

Section: Resultsmentioning

confidence: 99%

l- and d-[LnZn(IN)₃(C₂H₄O₂)]_n (Ln = Eu, Sm, and Gd): Chiral Enantiomerically 3D 3d–4f Coordination Polymers Constructed by Interesting Butterfly-like Building Units and −[Ln-O-Zn]_n– Helices

Liu

et al. 2016

Inorg. Chem.

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A total of six three-dimensional chiral coordination compounds L- and D-[LnZn(IN)3(C2H4O2)]n (Ln = Eu, Sm, and Gd; HIN = isonicotinic acid) have been successfully synthesized under hydrothermal conditions without any chiral auxiliary and characterized by IR, TG, elemental analyses, and solid-state circular dichroism spectra. The structures of 1-6 were determined by single-crystal X-ray structural analysis, which shows that L-[LnZn(IN)3(C2H4O2)]n (Ln = Eu (1), Sm (2), and Gd (3)) crystallize in space group P6522 and are levogyrate. The chiral frameworks of L-[LnZn(IN)3(C2H4O2)]n are constructed from L-helical Ln-O-Zn cluster chains, while adjacent L-type helical -[Ln-O-Zn]n- chains are connected through IN(-) ligands. D-[LnZn(IN)3(C2H4O2)]n (Ln = Eu (4), Sm (5), and Gd (6)) crystallize in space group P6122, and their chiral frameworks consist of D-helical Ln-O-Zn cluster chains. The observed second-harmonic generation efficiencies of [EuZn(IN)3(C2H4O2)]n, [SmZn(IN)3(C2H4O2)]n, and [GdZn(IN)3(C2H4O2)]n are 0.4, 0.3, and 0.3 times that of urea, respectively. We also studied luminescence spectra and luminescence lifetimes of 1 and 2. The luminescence lifetimes of 1 and 2 are 1.18 ms, and 29.6 μs, respectively.

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Hydrothermal Synthesis, Structural Characterization and Luminescent Property of a New 1-D Chain-like [Er(NC6H4O2)3(H2O)2]n

Cited by 9 publications

References 24 publications

Syntheses, Structures, Luminescence, and Magnetic Properties of a Series of Novel Coordination Polymers Constructed by Nanosized [Ln₈Fe₄] Rings

Syntheses, Structures, Luminescence, and Magnetic Properties of a Series of Novel Coordination Polymers Constructed by Nanosized [Ln₈Fe₄] Rings

Solvothermal Synthesis, Crystal Structure, and Luminescent Properties of Three Heterometallic Lanthanide‐Transition‐Metal Frameworks Constructed from Three Types of CuBr Motifs

l- and d-[LnZn(IN)₃(C₂H₄O₂)]_n (Ln = Eu, Sm, and Gd): Chiral Enantiomerically 3D 3d–4f Coordination Polymers Constructed by Interesting Butterfly-like Building Units and −[Ln-O-Zn]_n– Helices

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Hydrothermal Synthesis, Structural Characterization and Luminescent Property of a New 1-D Chain-like [Er(NC6H4O2)3(H2O)2]n

Cited by 9 publications

References 24 publications

Syntheses, Structures, Luminescence, and Magnetic Properties of a Series of Novel Coordination Polymers Constructed by Nanosized [Ln8Fe4] Rings

Syntheses, Structures, Luminescence, and Magnetic Properties of a Series of Novel Coordination Polymers Constructed by Nanosized [Ln8Fe4] Rings

Solvothermal Synthesis, Crystal Structure, and Luminescent Properties of Three Heterometallic Lanthanide‐Transition‐Metal Frameworks Constructed from Three Types of CuBr Motifs

l- and d-[LnZn(IN)3(C2H4O2)]n (Ln = Eu, Sm, and Gd): Chiral Enantiomerically 3D 3d–4f Coordination Polymers Constructed by Interesting Butterfly-like Building Units and −[Ln-O-Zn]n– Helices

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Syntheses, Structures, Luminescence, and Magnetic Properties of a Series of Novel Coordination Polymers Constructed by Nanosized [Ln₈Fe₄] Rings

Syntheses, Structures, Luminescence, and Magnetic Properties of a Series of Novel Coordination Polymers Constructed by Nanosized [Ln₈Fe₄] Rings

l- and d-[LnZn(IN)₃(C₂H₄O₂)]_n (Ln = Eu, Sm, and Gd): Chiral Enantiomerically 3D 3d–4f Coordination Polymers Constructed by Interesting Butterfly-like Building Units and −[Ln-O-Zn]_n– Helices