Crystal engineering of a versatile building block toward the design of novel inorganic–organic coordination architectures

Optimization and Synthesis of a La-TMA MOF with Some Improvements in Its Properties

A La-TMA metal-organic framework (MOF) made up of benzene-1,3,5-tricarboxylate and La(III) was synthesized by a different methodology compared to those in previous reports. By using various approaches, the structural characteristics and physical properties of the La-TMA MOF were analyzed. Eventually, the results showed micro-hexagonal hollow tubes with a high crystallinity grade and thermal stability (up to 400 °C) and a higher surface area compared with those from earlier reports. The BET surface area of a similar previous MOF was about 14.8 m²/g; however, in the current project, the BET surface area increased to about 34.49 m²/g and the Langmuir surface area to 42.3 m²/g.

I2-induced SC–SC transformation within two-dimensional Zn(ii)-triazole framework: an ideal detector of cyano-containing molecules

A SC–SC transformation process driven by I₂ has been shown to generate a 2D + 1D → 2D interpenetrated architecture from a 2D + 2D → 2D network. For the first time we demonstrate a selective sensor toward cyano-containing molecules.

Fluorescent selectivity for small molecules of three Zn-MOFs with different topologies based on a tetracarboxylate ligand

Three Zn-MOFs depended on solvent conditions have been obtained. The guest-free forms demonstrate luminescent sensor for small molecules.

2-{[4-(Pyridin-2-yl)pyrimidin-2-yl]sulfanyl}acetic acid

In the title mol­ecule, C₁₁H₉N₃O₂S, the pyridine and pyrimidine rings are almost parallel [dihedral angle = 6.7 (1)°]. In the crystal, adjacent mol­ecules are joined by O—H⋯N and C—H⋯O hydrogen bonds, leading to the formation of a sheet parallel to (10).

Ethyl 2-{[4-(pyridin-4-yl)pyrimidin-2-yl]sulfan-yl}acetate

In the title mol­ecule, C₁₃H₁₃N₃O₂S, the pyridine and pyrimidine rings form a dihedral angle of 3.8 (1)°. The crystal packing exhibits weak inter­molecular C—H⋯O hydrogen bonds.

Monoclinic polymorph of trans-tetra-aquabis-[(4-pyridylsulfanyl)-acetato-κN]cobalt(II)

The crystal structure of the title compound, [Co(C(7)H(6)NO(2)S)(2)(H(2)O)(4)], is a polymorph of the structure first reported by Du, Zhao & Wang [(2004). Dalton Trans, pp. 2065-2072]. The asymmetric unit of the title compound contains one half-mol-ecule; the Co(II) atom lies on an inversion centre in a distorted octa-hedral geometry coordinated by two N atoms of the pyridine rings of the 4-pyridylthio-acetate anions and four O atoms of water mol-ecules. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules, forming a three-dimensional network.