Photoluminescence properties of Gd(III) and Ce(III) lanthanide based metal organic frameworks

Abstract

The Gd(III) and Ce(III) based-MOFs (metal organic frameworks) have been synthesized by hydrothermal method using 1,2,4,5benzenetetracarboxylate (btec) ligand and characterized by elemental analysis, FT-IR, UV-visible and single-crystal X-ray diffraction. The crystal structure analysis of Gd(III) complex [C10H9GdO11] (1) and Ce (III) complex [C10H5CeO9] (2) show that the central lanthanide ions are coordinated by nine oxygen atoms in which eight O atoms from btec ligands and one O atom from water molecule for both structures. The nearest non-bonding Gd···Gd distance is 3.928 Å while Ce···Ce distance is 4.392 Å. Complex 1 and 2 bridged by oxygen atoms of btec ligands are formed in 3D networks via strong hydrogen bonds. Additionally, solid state photoluminescence properties of 1 and 2 at room temperature have been investigated. Under the excitation of UV light, intense cyan-blue emission for complex 1 and blue emission for complex 2 are exhibited in the visible regions.

Gözenekli malzemelerde Pr(III) iyonlarının anten etkisi ile duyarlılaştırılması

“…FT-IR spectra of free btec ligand and ComplexThere is no band at about 3400 cm -1 [ν(O-H)] because of no lattice water molecule in the complex. The ρ r (H 2 O) vibration at about 660 cm -1 in complex 1 is originated from coordinated water molecule[17,18]. The IR results are in agreement with the crystallographic parameters.…”

A new highly sensitive cryogenic luminescent MOF thermometer built with pyromellitic acid

“…S2, ESI †) indicate that all compounds are isostructural to the {[Ln 2 (H 2 Btec)(Btec)(H 2 O) 2 ]Á 4H 2 O} n materials (Ln = Eu, Tb, Gd, Er, Sm) reported in the literature. [25][26][27][28][29][30] The compound {[Ln 2 (H 2 Btec)(Btec)(H 2 O) 2 ]Á4H 2 O} n crystallises in a monoclinic system with the space group P2 1 /n (a = 10.7562(2) Å, b = 7.2075(2) Å, c = 17.2180(5) Å, b = 97.072(2)1). The structure is composed of two Ln 3+ ions with the same crystallographic site, one H 2 Btec 2À ligand, one Btec 4À ligand, two coordinating water molecules and four non-coordinating water molecules within the cavities of the material.…”

SYNTHESIS AND OPTICAL PROPERTIES OF THE NOVEL Ho(5-SSA), (5-SSA = 5-SULFOSALICYLIC ACID) CAGE STRUCTURE

“…Research interest in metal-organic frameworks (MOFs) is a relatively young and dynamic research field from the beginning of the 21 st century, when compared to other scientific fields, is one of the most important candidates for the interdisciplinary research [6][7][8][9][10]. MOFs which consist of the rare earth elements have some interesting magnetic and luminescence properties [11][12][13][14][15][16][17]. These materials also have high hydrogen storage, gas adsorption, and separation, photo-catalysis, and sensor properties [2,18,19].…”