Synthesis and crystal structures of a copper(ii) dinuclear complex and zinc(ii) coordination polymers as materials for efficient oxidative desulfurization of dibenzothiophene

Abstract

Dinuclear copper(ii) complex [Cu2(BAc)4(QX)2], and 2D zinc(ii) coordination polymer, [Zn(TDPA)2(TMPy)2]n, presented high oxidation and adsorption thermodynamics for dibenzothiophene sulfoxide (DBTO).

Synthesis, Structure, and Properties of a Dinuclear Cu(II) Coordination Polymer Based on Quinoxaline and 3,3-Thiodipropionic Acid Ligands

“…Coordination polymers having the hydroxide motifs have been reported to exhibit photoluminescence properties. 29,33 The Fig. 7b shows a somewhat uniform size distribution with a minimum particle size of 149 µm while the maximum was observed to be 159 µm.…”

“…The antisymmetric stretching vibrational mode of COO -(νasym (COO -)) is observed at 1567 cm -1 in [Cu 2 (TDPH) 4 (QNX)].DMF, a value lower than 1572 cm -1 in the free TDPH ligand suggesting coordination through the COOgroup of the TDPH. [28][29][30] In the uncoordinated TDPH, the symmetric COO -(νsym (COO -)) appear at 1315 cm -1 but shifted to a value of 1409 cm -1 , attributed to coordination through this group. The difference between the antisymmetric and symmetric stretching vibrations of the COOgroup Δ(νasym (COO -) -νsym (COO -)) is 158 cm -1 suggesting a bridging bidentate coordination mode for the COOin [Cu 2 (TDPH) 4 (QNX)].DMF.…”

“…The ν(C=O) absorption band observed at 1752 cm -1 in the TDPH ligand was shifted to a lower frequency at 1748 cm -1 suggesting that the coordination of the carboxylate group to the Cu(II) ion in 1 is via the carbonyl group. 29 The…”

“…It was observed that the excitation wavelength of 388 nm resulted in emission peaks observed at 401 nm and 547 nm, while the free ligands (quinoxaline and TDPH) exhibit photoluminescence emissions at 545 and 409 nm respectively. 29 The emission bands of 401 and 547 nm observed for compound [Cu 2 (TDPH) 4 (QNX)].DMF may be derived from the different coordination environment of quinoxaline and TDPH and also ligand to metal charge transfer (LMCT) 29,34. The free ligands displayed luminescence characters at 409 and 545 nm respectively.…”

Synthesis, Structure, and Properties of a Dinuclear Cu(II) Coordination Polymer Based on Quinoxaline and 3,3-Thiodipropionic Acid Ligands

“…Coordination polymers having the hydroxide motifs have been reported to exhibit photoluminescence properties. 29,33 The…”