Synthesis, crystal structures and luminescent properties of phenylmercury(II) complexes with thiohydrazone ligands having weak Hg····π and Hg····Hg interactions

Biswas, Susobhan; Mostafa, Golam; Steele, Ilan M.; Sarkar, Sushanta; Dey, Kamalendu

doi:10.1016/j.poly.2009.01.002

Cited by 19 publications

(9 citation statements)

References 70 publications

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“…To mention just one example, in phenylmercury(II) compounds with a thiohydrazone as the bridging unit the Hg---Hg contacts have a length of 4.022 Å, providing no evidence for significant contributions from metallophilic bonding. 86 3. Clustering of Mercury Atoms at Oxygen, Nitrogen, and Carbon Atoms: "Metallo-Complexes".…”

Section: Organometallicsmentioning

confidence: 99%

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Mercurophilic Interactions

Schmidbaur

Schier

2015

Organometallics

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The widely confirmed abundance of aurophilic interactions in the structural chemistry of gold(I) compounds gives reason to scrutinize the evidence for analogous mercurophilic interactions in mercury(II) compounds more sporadically advanced in the literature. From the inventory of early observations and more recently accumulated data it appears that the equilibrium distances of intra-and intermolecular Hg---Hg contacts (ca. 3.5 Å) are generally much larger than those of Au---Au contacts (ca. 3.0 Å). There are very few estimations of the small energy contributions associated with the Hg---Hg contacts from experimental data, but quantumchemical calculations have confirmed that these energies also are generally much lower than those for the Au---Au contacts. Notwithstanding, there are several special cases where particularly short Hg---Hg distances, or the preferred modes of associations of molecules into oligo-or polymeric arrays, do indicate significant attractive mercurophilic interactions. Photophysical phenomena also suggest that for several groups of oligomeric organomercury(II) compounds there is a much stronger Hg−Hg interaction in the excited state, with interesting consequences for the emissive properties. Interestingly, the most intriguing observations that suggest mercurophilic interactions, like the polymercuration of oxygen, nitrogen, and carbon, date back to the 19th century (Roucher in 1844, Millon in 1839, Sakurai in 1880, and Hofmann in 1900, respectively) and still call for a rationalization.

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Section: Organometallicsmentioning

confidence: 99%

“…These distances were not considered relevant by the authors, and details therefore were not given. To mention just one example, in phenylmercury(II) compounds with a thiohydrazone as the bridging unit the Hg- - -Hg contacts have a length of 4.022 Å, providing no evidence for significant contributions from metallophilic bonding …”

Section: Mercurophilicitymentioning

confidence: 99%

Mercurophilic Interactions

Schmidbaur

Schier

2015

Organometallics

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“…This trend was probably due to the Hg(II) species forming more-stable Au-Hg aurophilic complexes, relative to those of the organomercury species. [80][81][82][83] In addition, according to the literature, 84,85 PhHg(I) species undergo stronger hydrophobic interactions with alkanethiol units, thereby explaining the higher quenching efficiency relative to that of the other two organomercury species. We further studied the quenching efficiencies of 10 nM Au NDs@11-MUA 100 nM-100 mM induced by the four Hg species.…”

Section: Sensing Of Hg Speciesmentioning

confidence: 99%

Ligand effect on the luminescence of gold nanodots and its application for detection of total mercury ions in biological samples

Chang

Hung

et al. 2013

RSC Adv.

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“…Therefore, Hg(II) may interact with SiO 2 -G0-SA~SiO 2 -G2.0-SA by chelating mechanism involving nitrogen and oxygen groups. Despite the chelating interaction of nitrogen and oxygen groups with Hg(II), the weak Hg(II)-π interaction may also contribute to the adsorption capacity of SiO 2 -G0-SA~SiO 2 -G2.0-SA with an increase of the availability of phenyl groups on the surface[41].…”

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confidence: 99%