Zirconium-Polycarboxylato Gel Systems as Substrates to Develop Advanced Fluorescence Sensing Devices.

This study presents the development of zirconium polycarboxylate gel systems as substrates for advanced fluorescence sensing devices. Zirconium-based metal-organic gels (MOGs) offer a promising alternative due to the robustness of the Zr-O bond, which provides enhanced chemical stability. In this work, zirconium polycarboxylate gels were synthesized using green solvents in a rapid room temperature method.

Enhancing luminescence properties of lanthanide(III)/pyrimidine-4,6-dicarboxylato system by solvent-free approach.

The solvent-free melt reactions between lanthanide(iii) nitrates and pyrimidine-4,6-dicarboxylic acid (H2pmdc) led to three-dimensional (3D) coordination polymers with formula [Ln(μ4-pmdc)(NO3)(H2O)]n () [Ln(iii) = La, Ce, Pr, Nd, Sm, and Eu] and {[Ln(μ4-pmdc)(NO3)(H2O)]·H2O}n () [Ln(iii) = Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu]. The crystal structure of compounds is built up from the junction of centrosymmetric Ln(iii)-pmdc dimers, where pmdc ligand adopts an unusual μ4-κ(2)N,O:κ(2)N',O':κ(2)O,O'':κO''' coordination mode, rendering a metal coordination number of 10. The smaller ionic radii of the second half of the series prevents the latter coordination mode in , giving rise to a framework based on triangular shaped motifs.

A direct reaction approach for the synthesis of zeolitic imidazolate frameworks: template and temperature mediated control on network topology and crystal size.

The direct acid-base reaction between ZnO/CoO/Co(OH)(2) and imidazolic ligands under moderate heating (100-160 °C), in a closed vessel, leads to the generation of the corresponding zinc/cobalt-imidazolates in a high yield (87-97%) in which network topology is controlled by the addition of small amounts of structure directing agents. Moreover, the fine tuning of the thermal process at the synthetic stage permits us to increase the crystal size, and even to grow X-ray quality single crystals.

Influence of the synthetic conditions on the structural diversity of extended manganese-oxalato-1,2-bis(4-pyridyl)ethylene systems.

We report herein the synthesis and physicochemical characterization of eight new manganese-oxalato compounds with 1,2-bis(4-pyridyl)ethylene (bpe): {(Hbpe)(2)[Mn(2)(μ-ox)(3)]·∼0.8(C(2)H(5)OH)·∼0.4(H(2)O)}(n) (1), {[Mn(μ-ox)(μ-bpe)]·xH(2)O}(n) (2), [Mn(2)(μ-ox)(2)(μ-bpe)(bpe)(2)](n) (3), [Mn(μ-ox)(μ-bpe)](n) (4a and 4b), and {[Mn(4)(μ-ox)(3)(μ-bpe)(4)(H(2)O)(4)]·(X)(2)·mY}(n) with X = NO(3)(-) (5a), Br(-) (5b), and ClO(4)(-) (5c) and Y = solvation molecules.