2013
DOI: 10.1039/c3cc45450a
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A luminescent and dichroic hexagermane

Abstract: The hexagermane Pr(i)3Ge(GePh2)4GePr(i)3 has been synthesized and is not only the first such linear oligogermane to be structurally characterized but also is the first such compound to exhibit fluorescence and dichroic properties when observed under different orientations of plane polarized visible light.

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Cited by 42 publications
(24 citation statements)
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“…In contrast with the free molecular oligogermanes,, all complexes showed a total absence of luminescence both in solution and in solid form. The presence of transition metal fragments, M(CO) 3 (M = Cr, Mo, W), within the complexes results in a quenching of the emissive properties.…”
Section: Resultsmentioning
confidence: 67%
See 1 more Smart Citation
“…In contrast with the free molecular oligogermanes,, all complexes showed a total absence of luminescence both in solution and in solid form. The presence of transition metal fragments, M(CO) 3 (M = Cr, Mo, W), within the complexes results in a quenching of the emissive properties.…”
Section: Resultsmentioning
confidence: 67%
“…For the complexes studied, the nature of the metal M (compare 3a and 3c) has shown to have little effect on the UV/Vis absorption, whereas only the MACT is significantly bathochromically shifted when replacing Cr by Mo or W. [74] In contrast with the free molecular oligogermanes, [75,48] all complexes showed a total absence of luminescence both in solution and in solid form. The presence of transition metal fragments, M(CO) 3 (M = Cr, Mo, W), within the complexes results in a quenching of the emissive properties.…”
Section: Uv/vis Spectroscopymentioning
confidence: 99%
“…However, the use of different substitution patterns and also different polymerization degrees complicates a reliable comparison. While recent progress in the synthesis of oligogermanes [18–24] has provided ready access to oligogermanes many of these contain chromophoric substituents [22–27] , complicating UV spectroscopic analysis. The use of isostructural oligomeric silanes, germanes, and germanium containing silanes should help to obtain a more accurate estimation of the influence of silicon and germanium on the nature of σ-bond electron delocalization.…”
Section: Introductionmentioning
confidence: 99%
“…Interestingly, the same situation has been observed earlier for aryl pentagermane Ge5Ph12 [11a, 25] . Refering to the crystal structures for longer oligogermanes, namely (i-Pr)3Ge[GePh2]4Ge(i-Pr)3 [14,27] , it is possible to state that for higher catenated Ge derivatives (more than 4 atoms in the chain) the end atoms are canted from the plane formed by the central atoms. Furthermore, in 4 in contrary from Ge5Ph12, the Ge-Ge bond with Ge(1) atom out of plane is the longest one.…”
Section: Molecular Structurementioning
confidence: 99%