Synthesis of polyethylene oxide graft polysilylenes and networks based on poly(di‐n‐pentylsilylene/n‐pentyloct‐7‐enyl) copolymers

Schwegler, Leonore A.; Meyer‐Pundsack, C.; Möller, M. Oliver

doi:10.1002/1099-0518(20000701)38:13<2306::aid-pola30>3.3.co;2-8

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dichlorosilanes were polymerized using a dispersion of sodium in THF at room temperature. This approach was chosen because of the superior yields compared to classical Wurtz coupling polymerization with molten sodium in refluxing toluene 15 (Table 1). The dispersion was prepared in analogy to the method described by Jones and co-workers, 25 replacing toluene with xylene because of the higher boiling point of this solvent.…”

Section: Resultsmentioning

confidence: 99%

“…In consequence, only few functional polyorganosilanes are known to date. For example, trimethylammonium moieties bound to phenethyl substituents have been reported by Seki et al 13 Aromatic hydroxyl functionalities at polysilanes have been introduced by way of trimethoxysilane protected phenols by Horiguchi et al 14 M€ oller and co-workers 15 employed polymer modification reactions including hydrosilylation with unsaturated polysilane substituents to generate aliphatic hydroxyl substituents.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multihydroxy-Functional Polysilanes via an Acetal Protecting Group Strategy

Reuss

Frey

2010

Macromolecules

View full text Add to dashboard Cite

A new acetal-protected monomer for Wurtz-type coupling to polysilanes, dichloro(3-(2,2dimethyl-1,3-dioxolane-4-yloxy)propyl)methylsilane, referred to as dichloro(isopropylidene glyceryl propyl ether)methylsilane (DCIMS), has been introduced to synthesize a series of protected linear polysilane copolymers, poly[di-n-hexylsilane-co-(isopropylidene glyceryl propyl ether)methylsilane] (P(DHS-co-IMS)) via alkali-mediated reductive Wurtz-type coupling. The acetal protecting group proved stable under the harsh polymerization conditions. Differential scanning calorimetry combined with 1 H, 13 C, and 29 Si NMR measurements confirmed composition and random structure of the obtained copolymers. After separation of the cylic fraction, this route yielded defined linear polysilane copolymers with monomodal molecular weight distributions (2000-98700 g mol -1 (SEC)) and polydispersities in the range 1.61-2.60. Subsequent cleavage of the acetal protecting groups under acidic conditions resulted in the multihydroxy-functional polysilanes poly[di-n-hexylsilane-co-(glyceryl propyl ether)methylsilane] (P(DHS-co-GMS)).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multihydroxy-Functional Polysilanes via an Acetal Protecting Group Strategy

Reuss

Frey

2010

Macromolecules

View full text Add to dashboard Cite

show abstract

“…The post functionalization of polymers is also an alternative way to introduce new functional groups into synthesized polysilanes [11][12][13][14][15][16][17][18]. Hydrosilylation reaction verified as an important approach for obtaining functional polysiloxane and the synthesis of functional polysilane [12]. Multihydroxy functional polysilane copolymer synthesized via acetal protecting group strategy [19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Multifunctional Chiral and Photoactive Organic-Inorganic Block Copolymers of Poly(methylphenylsilane) with (R)-N-(1-phenylethyl)methacrylamide, Disperse Red 1 Methacrylate and Their optical and Photophysical Properties

Meenu¹,

Ds²,

Lagarkha³

et al. 2018

Preprint

View full text Add to dashboard Cite

Now-a-days, the thrust area of materials’ research is to develop multifunctional materials, which have multiple properties in a single functional material. We are interested to develop multifunctional polysilanes having special functional properties such as optical activity and photoluminescence (PL) properties. In this investigation, poly(methyl phenyl silane) (PMPS) was integrated with a chiral unit and a photoactive unit by in situ photopolymerization of  (R)-N-(1-phenyl ethyl) methacrylamide (R-NPEMAM) and disperse red 1 methacrylate (DR1MA) monomer in the presence of PMPS. PMPS acted as a macrophotoinitiator and by UV exposure it produced macroradicals which initiated polymerization of chiral and photoactive monomers. Thus a block copolymer of PMPS-b-(R-NPEMAM-ran-DR1MA) was synthesized.The synthesized multifunctional organic inorganic hybrid polymer samples were characterized by FTIR and NMR spectroscopy. The molecular weights of the samples were measured by GPC analysis. The optical, chiroptical and photoluminescence properties were studied. The narrow band at about 1638 cm-1 is due to C=O stretching vibration of -CONH- of the chiral unit.  A wide absorption peaks at 3444 cm-1 is the characteristic of NH trans stretching vibration of secondary amide group. The asymmetric stretching of NO2 group appeared at 1481 cm-1 and the characteristic peak at 1427 cm-1 was observed due to azo (-N=N-) group stretching of DR1MA unit. The Si-Si band of PMPS appeared at about 462 cm-1 in FTIR spectra. The optical absorbance observed at 272 nm is due to π-π* transition of aromatic ring and at 330 nm corresponds to σ-σ* transition of Si-Si bond. The other electronic absorption observed in the visible region at 475 nm corresponds to the combined contribution of n-π* and π-π* transition of DR1MA unit. The photoluminescence properties of such polymers were studied for the variation of concentration of the polymer solution and variation with excitation energy such as 275 nm, 325 nm and 475 nm in THF solvent. Such synthesized multifunctional photoactive organic-inorganic polymers having unusual optical, chiroptical and photoluminescence property may find novel optoelectronic (friend foe identification and secretive code identification) applications.

show abstract