Synthesis of 2,5-Substituted Siloles and Optical Study of Interactions with Mercury(II), Copper(II), and Nickel(II) Cations

Several 2,5-diaryl-1,1-dimethyl-3,4-diphenylsiloles (with aryl = <i>p</i>-cyanophenyl (<b>1</b>), <i>m,p</i>-bis­(methylthio)­phenyl (<b>2</b>), <i>p</i>-<i>N</i>,<i>N</i>-dimethylaminophenyl (<b>3</b>), 2,2′-bipyridin-6-yl (<b>4</b>)) were synthesized and characterized by UV–vis, fluorescence, and NMR spectroscopy, along with crystal structure determinations for <b>1</b> and <b>2</b>. Compounds <b>1</b>–<b>4</b> in methylene chloride were combined with 1–10 equiv of M­(ClO₄)₂ (M = Ni, Cu, Hg) in methanol, and the resulting solutions were monitored by UV–vis and fluorescence spectroscopy. Compound <b>1</b> showed slight effects for each metal, <b>2</b> exhibited fluorescence quenching selectively for Hg­(II), <b>3</b> showed significant changes for all cations, and <b>4</b> generally demonstrated fluorescence quenching for all cations. A discussion of the causes behind these changes is also presented

Synthesis of 2,5-Substituted Siloles and Optical Study of Interactions with Mercury(II), Copper(II), and Nickel(II) Cations

Several 2,5-diaryl-1,1-dimethyl-3,4-diphenylsiloles (with aryl = <i>p</i>-cyanophenyl (<b>1</b>), <i>m,p</i>-bis­(methylthio)­phenyl (<b>2</b>), <i>p</i>-<i>N</i>,<i>N</i>-dimethylaminophenyl (<b>3</b>), 2,2′-bipyridin-6-yl (<b>4</b>)) were synthesized and characterized by UV–vis, fluorescence, and NMR spectroscopy, along with crystal structure determinations for <b>1</b> and <b>2</b>. Compounds <b>1</b>–<b>4</b> in methylene chloride were combined with 1–10 equiv of M­(ClO₄)₂ (M = Ni, Cu, Hg) in methanol, and the resulting solutions were monitored by UV–vis and fluorescence spectroscopy. Compound <b>1</b> showed slight effects for each metal, <b>2</b> exhibited fluorescence quenching selectively for Hg­(II), <b>3</b> showed significant changes for all cations, and <b>4</b> generally demonstrated fluorescence quenching for all cations. A discussion of the causes behind these changes is also presented

Reaction of a Symmetrical Diplatinum Complex Containing Bridging μ-η²-H−SiH(IMP) Ligands (IMP = 2-Isopropyl-6-methylphenyl) with PMe₂Ph. Formation and Characterization of {(PhMe₂P)₂Pt[μ-SiH(IMP)]}₂

A dinuclear Pt−Si complex containing bridging η2-H−SiH(IMP) (IMP = 2-isopropyl-6-methylphenyl) ligands, {(Ph3P)Pt[μ-η2-H−SiH(IMP)]}2 (1) has been synthesized and characterized by NMR and X-ray crystallography. A 3c-2e nonclassical interaction between Pt···H···Si is supported by spectroscopic and crystallographic data. Complex 1 reacts with the more basic and less hindered phosphine PMe2Ph to afford a different dinuclear Pt−Si complex with loss of H2, {(PhMe2P)2Pt[μ-SiH(IMP)]}2 (2). Complex 2 was characterized by multinuclear NMR spectroscopy

Preparation and Photophysical Properties of Phosphino- and Phosphine Oxide-Linked Siloles

Preparation and Photophysical Properties of Phosphino- and Phosphine Oxide-Linked Silole

Synthesis, Characterization, and Crystal Structures of 1,1-Disubstituted-2,3,4,5-tetraphenylgermoles That Exhibit Aggregation-Induced Emission

A series of 2,3,4,5-tetraphenylgermoles with different 1,1-substituents have been prepared, and their UV–vis absorption and fluorescence spectral profiles in solution were determined. A thin-layer chromatography based method was used to measure their solid-state luminescence. Nine of the 11 new germoles have been characterized crystallographically. The aggregation-induced emission effect in these germoles was studied, and significant enhancement of the photoluminescence and quantum yield in mixed solvent–water systems was determined. Scanning and transmission electron microscopy analysis revealed the formation of nanocrystalline aggregates in the mixed solvent–water systems and after exposure of the germoles to acetone, a volatile organic chemical

Preparation and Photophysical Properties of Phosphino- and Phosphine Oxide-Linked Siloles

Preparation and Photophysical Properties of Phosphino- and Phosphine Oxide-Linked Silole

Synthesis, Characterization, and Crystal Structures of 1,1-Disubstituted-2,3,4,5-tetraphenylgermoles That Exhibit Aggregation-Induced Emission

A series of 2,3,4,5-tetraphenylgermoles with different 1,1-substituents have been prepared, and their UV–vis absorption and fluorescence spectral profiles in solution were determined. A thin-layer chromatography based method was used to measure their solid-state luminescence. Nine of the 11 new germoles have been characterized crystallographically. The aggregation-induced emission effect in these germoles was studied, and significant enhancement of the photoluminescence and quantum yield in mixed solvent–water systems was determined. Scanning and transmission electron microscopy analysis revealed the formation of nanocrystalline aggregates in the mixed solvent–water systems and after exposure of the germoles to acetone, a volatile organic chemical

Preparation and Photophysical Properties of Phosphino- and Phosphine Oxide-Linked Siloles

Preparation and Photophysical Properties of Phosphino- and Phosphine Oxide-Linked Silole

Synthesis, Characterization, and Crystal Structures of 1,1-Disubstituted-2,3,4,5-tetraphenylgermoles That Exhibit Aggregation-Induced Emission

A series of 2,3,4,5-tetraphenylgermoles with different 1,1-substituents have been prepared, and their UV–vis absorption and fluorescence spectral profiles in solution were determined. A thin-layer chromatography based method was used to measure their solid-state luminescence. Nine of the 11 new germoles have been characterized crystallographically. The aggregation-induced emission effect in these germoles was studied, and significant enhancement of the photoluminescence and quantum yield in mixed solvent–water systems was determined. Scanning and transmission electron microscopy analysis revealed the formation of nanocrystalline aggregates in the mixed solvent–water systems and after exposure of the germoles to acetone, a volatile organic chemical

Synthesis, Characterization, and Crystal Structures of 1,1-Disubstituted-2,3,4,5-tetraphenylgermoles That Exhibit Aggregation-Induced Emission

A series of 2,3,4,5-tetraphenylgermoles with different 1,1-substituents have been prepared, and their UV–vis absorption and fluorescence spectral profiles in solution were determined. A thin-layer chromatography based method was used to measure their solid-state luminescence. Nine of the 11 new germoles have been characterized crystallographically. The aggregation-induced emission effect in these germoles was studied, and significant enhancement of the photoluminescence and quantum yield in mixed solvent–water systems was determined. Scanning and transmission electron microscopy analysis revealed the formation of nanocrystalline aggregates in the mixed solvent–water systems and after exposure of the germoles to acetone, a volatile organic chemical