Preparation and characterization of Ni(dpedt)(pddt) and Ni(dpedt)(pddt)·CS2, where dpedt is diphenylethylenedithiolate and pddt is 6,7-dihydro-5H-1,4-dithiepin-2,3-dithiolate

Anyfantis, George C.; Papavassiliou, George C.; Terzis, Aris; Raptopoulou, Catherine P.; Psycharis, Vassilis; Paraskevopoulou, Patrina

doi:10.1016/j.poly.2009.11.014

Cited by 8 publications

(9 citation statements)

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“…The intermolecular contacts form a q-1D network. In [Ni(dpedt)(dddt)] [64] and [Ni(dpedt)(pddt)] [94] these distances are 3.764 and 3.738 Å, respectively, which are a little larger than the sums of van der Waals radii (3.70 Å).…”

Section: Structural Propertiesmentioning

confidence: 95%

“…The advantage of the method is that the reactions take place at room or lower temperatures, and usually the yields are larger than those of the ligand exchange method. A number of neutral complexes, with simple ligands and extended TTF-dithiolato ligands have been prepared by this method: These are [64] and [Ni(dpedt)pddt)] [94]. Neutral unsymmetrical M 1,2-DTs complexes could be obtained as main products of the reaction of Scheme 8 (see [106] and references therein).…”

Section: Methodsmentioning

confidence: 99%

“…The neutral complexes may exist as planar monomers or form dimers with either metal-metal bonds or metal-sulfur (selenium) bonds. Most of M 1,2-DTs were found to be crystallized in centrosymmetric space group and, up to now, only three complexes have been found to be crystallized in non centrosymmetric space group (see [7,10,15,17,20,63,64,69,94,97]). The data from selected M 1,2-DTs are described here, starting from crystals with weak intermolecular interactions.…”

Section: Structural Propertiesmentioning

confidence: 99%

“…The unsymmetrical complexes [Pd(dpedt)(dddt)], [Ni(dpedt)(dddt)] and [Ni(dpedt)(pddt)] are isostructural and are crystallized in the orthorhobic non-centrosymmetric space group Pbc2 1 [63,64,94]. Figure 14 shows the stacking of [Pd(dpedt)(dddt)] molecules in a column along the c-axis.…”

Section: Structural Propertiesmentioning

confidence: 99%

“…They are compared to those obtained from the corresponding TTFs and similar single component materials. More information concerning the ligands of Table 1 can be found in [6][7][8][9][10][11][12][13][14][15][16]20,21,24,[26][27][28]30,31,34,36,[48][49][50]53,[61][62][63][64]72,77,79,88,89,92,94,[100][101][102][103][104]. More information concerning the ligands of Table 2 can be found in the corresponding references for L1 [34], L2 [34,98], L3 [33,95,102], L4 …”

Section: Introductionmentioning

confidence: 99%

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Neutral Metal 1,2-Dithiolenes: Preparations, Properties and Possible Applications of Unsymmetrical in Comparison to the Symmetrical

2012

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This paper is an overview concerning the preparations and properties as well as possible applications of neutral (one component) metal 1,2-dithiolenes (and selenium analogues). The structural, chemical, electrochemical, optical and electrical behavior of these complexes depend strongly on the nature of ligand and/or the metal. The results of unsymmetrical in comparison to those of symmetrical complexes related to the properties of materials in the solid state are primarily discussed. The optical absorption spectra exhibit strong bands in the near IR spectral region ca. 700 to ca. 1950 nm. X-ray crystal structure solutions show that the complexes usually have square-planar geometry with S-S and/or M-S contacts. Some of them behave as semiconductors or conductors (metals) and are stable in air. The cyclic voltammograms at negative potentials are different from the corresponding potentials of tetrathiafulvalenes (TTFs). As a consequence, the LUMO bands occur at much lower levels than those of TTFs. Consequently, electrical measurements under conditions of field effect transistors exhibit n-type or ambipolar behavior. Illumination of materials with high power lasers exhibits non-linear optical behavior. These properties enable metal 1,2-dithiolene complexes to be classified as promising candidates for optical and electronic applications, (e.g., saturable absorbers, ambipolar inverters). OPEN ACCESSCrystals 2012, 2 763

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Section: Structural Propertiesmentioning

confidence: 95%