Chirality detection of two enantiomorphic 3D lanthanide coordination polymers by vibrational circular dichroism spectra

Abstract

Two enantiomorphic 3D lanthanide coordination polymers of {[Dy5(L)4(H2O)10][Dy(H2O)7][Na(H2O)5]}·(ClO4)7·(H2O)15 (1a for R and 1b for S) with chiral helical chains were synthesized based on an achiral ligand N-(2-hydroxyethyl)ethylenediamine-N,N',N'-triacetic acid (H3L) and Dy(ClO4)3. Crystal analysis revealed that 1a and 1b were crystallized in chiral space groups P4132 and P4332, respectively. The absolute configurations of the two structures were evidenced by vibrational circular dichroism (VCD) spectra with one single crystal sample.

Ionic liquid cations as methylation agent for extremely weak chalcogenido metalate nucleophiles

“…Chalcogenido metalate clusters represent low-dimensional fragments of metal chalcogenide semiconductor materials, which can resemble exact extracts of these or may exhibit very different architectures 1–5. Such units are intensively investigated for a variety of potential uses, such as for opto-electronic applications,6 molecular trapping7 and photocatalytic hydrogen activation,8 or for selective ion capture and exchange 9. Owing to the high anionic charge of discrete clusters, or the polymeric nature of cluster networks (of lower charge per cluster unit), these compounds form solid salts-like structures.…”

Interlinking supertetrahedral chalcogenolate clusters with bipyridines to form two-dimensional coordination polymers for photocatalytic degradation of organic dye

“…For example, Feng and co-workers reported a range of M-M′-E (M = Ga, In; M′ = Ge, Sn; E = S, Se) SCC clusters into zeolite analogs of microporous and photoluminescent chalcogenides, which are efficient visible-light photocatalysts for hydrogen generation from water. 18,19 Kanatzidis and co-workers designed the reaction of SCC clusters [M 4 E 10 ] 4− (M = Ge, Sn; E = S, Se) with Pt 2+ and formed porous semiconducting gels and aerogels. 20 On the other hand, the principles of coordination chemistry and reticular chemistry have been recently applied in the assembly of SCC clusters into coordination polymers, in which the SCC clusters are interlinked with multifunctional organic linkers.…”

Solvothermal synthesis of a new 3-D mixed-metal sulfide framework, (H1.33tren)[In2.67Sb1.33S8]·tren

“…Open-framework chalcogenides offer advantages 3 over the electrically insulating zeolites for some applications, as they combine porosity with semiconducting behaviour. Recent research has sought to create semiconducting chalcogenide-based materials in which the band gap is tuned to enable them to be used as chemical sensors [5] and photocatalysts [6].…”