Polysilanes as conducting material producers and their application to metal pattern formation by UV light and electroless metallization

Synthesis and Characterization of Fluorescent Polymer−Metal Nanocomposites Comprising Poly(silylene-co-silyne)s and Silver Nanoparticles

“…29 Si NMR spectra (CPMAS) display characteristic resonances at δ À30 to À42 and À55 to À65 due to linear and branched sites respectively 1,32 ( Figure 1). For 1, 5 and 2, the signals due to Et 3 Si and FuMe 2 Si groups of the appended side chains appear at δ 8.7, 8.9, and À9.18 respectively. UVÀvis spectra of 1À4 in toluene solution are quite similar and exhibit an absorption maximum in each case at ∼330 nm associated with σÀσ* transition of linear poly(methylphenylsilane) segment while a Macromolecules ARTICLE shift to lower wavelength (318 nm) is observed in 5 as a result of increasing branching structures in the polymer framework.…”

“…(bp 140À 145°C/5 mm Hg; yield 70%). 1 H NMR (CDCl 3 , 300 MHz): δ 7.59 (d, 3 J HH = 1.5 Hz, Fu H-5), 6.63 (dd, 3 J HH = 3 Hz, 3 Synthesis of Branched Polysilanes 1À5. A typical procedure for the synthesis of branched polysilanes, 1À4 is as follows.…”

“…Fukushima et al have reported tentative assignment of the redox potential (þ0.34 to þ0.54 V) of linear poly(methylphenylsilane)s with respect to standard hydrogen electrode, suggesting their affinity to reduce metal ions with higher oxidation potential. 3 The approach has been successfully utilized for the synthesis of silicon based polymerÀmetal nanocomposites which exhibit excellent catalytic properties in many organic transformations. 4À9 Metal nanoparticles in polysilane/ siloxane based matrices are considered to exhibit superior activity and selectivity toward catalytic reactions than bound to strong co-ordinating ligands due to weaker interactions between nanoparticles and polymer surfaces.…”

Linear, branched and network polysilanes with thienyl/furyl substituted sila-alkyl side chains and their applications for the synthesis of fluorescent silver nanoparticles/clusters

“…12 An emerging offshoot in this area relates to synthesis of copolymers incorporating linear polysilane units [R 2 Si] n in the structural framework. [13][14][15][16] A primary impetus for these studies is to utilize the reducing property of polysilanes towards noble metal ions such as Ag(I), Au(III), Pd(II) and Pt(IV), etc. for the synthesis of metal nanoparticles within the polymer scaffolds.…”

Scope of network polysilanes in the synthesis of fluorescent silver and gold nanoparticles/nanoclusters‐modulations of their optical properties in the presence of Hg(II) ions

“…Linear polysilanes which possess amenable band gap energy (3–4 eV) associated with σ‐delocalized backbone5 have also been studied for their reducing behavior toward Ag(I), Au(III), and Pd(II) ions. A few copolymer templates incorporating polysilane units [R 2 Si] n have been utilized for the synthesis of silicon‐based polymer–metal nanocomposites which exhibit excellent catalytic properties in many organic transformations, including hydrogenation, Suzuki, Sonagashira coupling, and hydrosilylation reactions 6–11. It has been shown that donor ability of the appended 2‐theinyl/2‐furyl groups on the sila‐alkyl side chains in linear polysilanes imparts better stabilization of Ag and Pd nanoparticles 12, 13.…”