New oligomeric tungsten-chalcogenide anions

A combined stopped-flow, electrospray ionization mass spectrometry and31P NMR study on the acetic acid-mediated fragmentation of the hydroxo-chalcogenide cluster [W3Se4(OH)3(dmpe)3]+(dmpe = 1,2-bis(dimethylphosphanyl)ethane) to yield the dinuclear [W2Se2(µ-Se)2(µ-CH3CO2)(dmpe)2]+complex

“…A family of compounds of general formula [W 2 Se 2 (l-Se) 2 (Se n ) 2 ] 2− (n = 2, 3, 4) was prepared by Ibers and co-workers in 1988 where often the presence of several isomers coexist with higher nuclearity compounds. [28][29][30] The structure of complex [2]PF 6 has been determined by single crystal X-ray diffraction. Compound [2]PF 6 crystallizes in the chiral space group P2 1 .…”

“…This arrangement is also found in the dinuclear complex (Et 4 N)[Mo 2 O 2 (l-S) 2 -(l-CF 3 CO 2 )(S 2 P(OEt) 2 ) 2 ] and other closely related complexes of general formula [Mo 2 X 2 (l-Q) 2 L 2 ] (X = O, S, Se; Q = S, Se; L = bidentate ligand). [29][30][31][32][33][34][35][36] Table 1 shows a list of selected bond lengths in compound [2]PF 6 together with those of other dinuclear complexes containing similar W 2 Q 2 (l-Se) 2 (Q = O, Se) cluster cores.…”

The synthesis and characterization of W(SeMes)4•THF (Mes = mesityl): a possible homoleptic mononuclear tungsten selenolate. Its reaction with CNtBu to yield (tBuNC)(MesSe)2W(μ-Se)2W(SeMes)2(CntBu)

“…The IR spectrum of 2 shows a strong v(NC) band at 2141 cm-l. The 7 7~e NMR spectrum shows two resonances, but the position of the signals is surprising compared to that of known tungsten-selenide-selenolate species (25,26,29). A very sharp resonance appears at 508 pm (vIl2 = 10 Hz); a second resonance appears at 369 pprn (v,/, = 15 Hz).…”

Transition Metal Dichalcogenide for High-Performance Electrode of Supercapacitor

“…Recent advancement of molybdenum disulfide-based electrodes and its comparison with that of other metal chalcogenidebased electrodes are also included. Researchers have exerted experimental efforts, focusing on some perspectives, viz., (i) synthesis techniques that successfully materialized various TMDs, e.g., Hg7Se10, [15] tungsten chalcogenides, [16] hollow sphere copper chalcogenides, [17] epitaxially grown cadmium chalcogenides, [18] seed-mediated CdSe, [19] ternary TMDs, [20] and molecularly controlled synthesis of cadmium chalcogenides [21]. (ii) Fundamental studies of new types of TMDs, such as silver chalcogenides, [22] lanthanumdoped TMDs, [23] rhenium chalcogenides, [24] and vanadium chalcogenides, [25] were also conducted to obtain insights into prospective applications.…”