Energy transfer in supramolecular [Crypt-RE]-[WI] solids.

Photophysical properties of tungsten iodides with the [W6I14]2- cluster core have been described with respect to phosphorescence and phosphorescence quenching by molecular oxygen. This process involves energy transfer from excited triplet states of the cluster onto molecular oxygen. In the present study we investigate deactivation channels of exited triplet states of the [W6I14]2- cluster towards rare earth ions.

Photodynamic properties of tungsten iodide clusters incorporated into silicone: A[MIL]@silicone.

The light-induced antibacterial and antifungal properties of A[MIL] with M = Mo and W, A = organic cation, L = ligand have been studied. The photoactive compounds (TBA)[WI(CHSO)] and (TBA)[WI(COOCF)] have been incorporated into a permeable silicone matrix and were measured for their application in the decomposition of multi-resistant bioactive species (hospital germs) such as and as well as fungi. In addition, we present a new high volume synthesis route for these types of cluster compounds departing from the soluble compound WI.

Modulating the Electronic and Solid-State Structure of Organic Semiconductors by Site-Specific Substitution: The Case of Tetrafluoropentacenes.

The properties as well as solid-state structures, singlet fission, and organic field-effect transistor (OFET) performance of three tetrafluoropentacenes (1,4,8,11: 10, 1,4,9,10: 11, 2,3,9,10: 12) are compared herein. The novel compounds 10 and 11 were synthesized in high purity from the corresponding 6,13-etheno-bridged precursors by reaction with dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate at elevated temperatures. Although most of the molecular properties of the compounds are similar, their chemical reactivity and crystal structures differ considerably.

Tungsten Iodide Clusters as Singlet Oxygen Photosensitizers: Exploring the Domain of Resonant Energy Transfer at 1 eV.

The photophysics of selected tungsten iodide clusters was examined with respect to their role as a photosensitizer for the production of singlet oxygen, O(aΔ). We examined all-iodo octahedral clusters, [WI(I)], and ligand-substituted octahedral clusters, [WI(L)], in which the ligand, L, occupies the outer apical positions surrounding the cluster core. We also examined a square-pyramidal cluster, [WI(I)], in which the tungsten core was presumably more accessible to diffusional encounter with ground state oxygen, O(XΣ).

Lithium and Sodium Ion Distributions in A[WI] Structures.

Ag[WI] and A[WI] compounds with A = Na, Li were prepared from binary tungsten iodides (WI) and corresponding metal iodides. Their crystal structures are analyzed on the basis of X-ray diffraction data. Li and Na solid-state NMR measurements reveal that Li and Na ions are distributed over two sites in the respective structures.