New Routes to Organodecaborane Polymers via Ruthenium-Catalyzed Ring-Opening Metathesis Polymerization

Wei, Xianzhe; Carroll, Patrick J.; Sneddon, Larry G.

doi:10.1021/om0342107

Cited by 34 publications

(21 citation statements)

References 7 publications

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“…This result demonstrated that P(NB-co-DE) displayed excellent thermal properties as well as the homopolymer of poly(6-norbornenyldecaborane) branched with decaborane 14. This result demonstrated that P(NB-co-DE) displayed excellent thermal properties as well as the homopolymer of poly(6-norbornenyldecaborane) branched with decaborane 14.…”

mentioning

confidence: 69%

“…12 Sneddon and coworkers have shown new selective routes to boron carbide based on the use of the new polymer systems by using decaborane as the resource of boron atom. 14 Yu et al also demonstrated that poly(6-hexenyldecaborane) and poly(6-norbornenyldecaborane could be obtained with decaborane in the mainchain by catalytic sequential hydroboration. Wei et al reported the synthesis of poly(6-norbornenyldecaborane) and poly(6-cyclooctenyldecaborane) by employing ruthenium-catalyzed ring-opening metathesis polymerization (ROMP) reaction.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of B–C polymer hollow microspheres from a new organodecaborane preceramic polymer

Xiao-juan

Cao

et al. 2015

RSC Adv.

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A new poly (norbornenyldecaborane-co-hexadiene) (P(NB-co-DE)) copolymer as a kind of boron carbide preceramic polymer, was synthesized by the ruthenium-catalyzed ring-opening metathesis polymerization (ROMP) reaction of 6-norbornenyldecaborane with 1,5-hexadiene. The synthesized polymer precursor which had good solubility and film-forming ability was freely soluble in most organic solvent and with a high ceramic yield of 74 % at 700 ºC. Furthermore, this polymer precursor was used to fabricate B-C hollow microspheres by microencapsulation. The prepared capsules with a diameter of about 570 µm had potential to obtain hollow B-C based ceramic microspheres, and they could be used in polymeric state or pyrolyzed ceramic forms.

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mentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of B–C polymer hollow microspheres from a new organodecaborane preceramic polymer

Xiao-juan

Cao

et al. 2015

RSC Adv.

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“…Molecular weight analysis yielded number-average molecular weights (M n ) in excess of 30 kDa (1 Da » 1.66 10 ±27 kg) and polydispersities between 1.1 and 1.7. Thermogravimetric analysis (TGA) of the ceramic conversion of PND with an M n of 32 kDa indicated that weight loss began near 150 C and was complete by 600 C. [22] The observed TGA (72 %) and bulk ceramic yields (58 % at 1650 C) were in the range of the theoretical ceramic yield predicted by the reaction in Scheme 2 (65 %). Elemental analysis of the grey/black residue obtained at 1650 C (B: 67.9 %; C: 32.2 %) corresponded to a composition of B 4 C´0.74C.…”

Section: Methodsmentioning

confidence: 91%

“…PND polymers (Scheme 1) were prepared [22] via ring-opening metathesis polymerization (ROMP) of 6-norbornenyldecaborane with Grubbs' first-generation catalyst Cl 2 (PCy 3 ) 2 -Ru(CHPh). [23] The polymers are air-stable white solids that are readily soluble in organic solvents.…”

Section: Methodsmentioning

confidence: 99%

Preparation of Boron‐Carbide/Carbon Nanofibers from a Poly(norbornenyldecaborane) Single‐Source Precursor via Electrostatic Spinning

et al. 2005

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glass in this work is lower than that of phosphate glass. According to the investigation by Weyl, [6] the above results are on account of the multiabsorption of V 4+ and V 3+ . If one could adjust the composition and modify the procedure properly, more V 3+ and V 4+ states could be converted into the V 5+ state, and the transmission of the vanadate glass would likely be much better. In summary, a novel vanadate glass with remarkable optical transmission was fabricated for the first time. The vanadate glass used in this experiment is suitable for optical applications. Furthermore, when doped with neodymium, it demonstrated quite encouraging laser properties. The results indicated the feasibility of utilizing the novel transparent vanadate glasses in optics, especially in laser-related fiber optics. ExperimentalThe glass samples were prepared from high purity materials. The composition of the sample materials was carefully monitored and the experimental conditions were controlled to obtain a higher concentration of V 5+ in the glass samples. After hundreds of experiments, the glass was developed from the traditional binary composition to a quaternary one: 28V 2 O 5 ±22SiO 2 ±23MO (CaO, BaO, SrO)±27X 2 O (Na 2 O, K 2 O, Cs 2 O) in weight percentage. The batch materials were melted in a platinum crucible inside a silica tube heated by a medium induction furnace. Oxygen gas of 99.99% purity was introduced into the silica tube throughout the whole melting process. The crucible was heated at 1650 K for 2 h. The melted substances were then cast in a graphite mould and annealed. All the samples were fabricated to the size of 25 mm 20 mm 5 mm and optically polished.The absorption spectra were measured using a HITACHI330 spectrometer at room temperature (295 K). The IR spectra were measured using a SHIMADZU RF±5301PC at room temperature. The emission spectra were obtained by exciting the samples with an 805 nm diode laser. The light from the light source was chopped at 80 Hz and focused onto the 5 mm 25 mm faces of the samples. One millimeter from the edge was excited to minimize the re-absorption of the emission. The emission from the samples was focused to a monochrometer and detected by a germanium detector. The signal was intensified with a lock-in amplifier and processed by a computer.The fluorescence lifetime was measured by exciting the samples with a xenon lamp and detected by an S-1 photomultiplier tube. The fluorescence decay curves were recorded and averaged by a computer-controlled transient digitizer. The stimulated-emission cross-section of the neodymium-doped vanadate glass was calculated according to the Judd±Ofelt theory [9,10].

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“…The 6,6 -(CH 2 ) 6 -(B 10 H 13 ) 2 (1), 3 6-CH 2 CH(CH 2 ) 4 -B 10 H 13 (2) 3 , [6-(CH 2 ) 6 -B 10 H 13 ] x (3), 4 6-C 7 H 9 -B 10 H 13 (4), 5 6-C 8 H 13 -B 10 H 13 (5), 5 [6-C 7 H 9 -B 10 H 13 ] x (6), 5 and [6-C 8 H 13 B 10 H 13 ] x (7) 5 were synthesized as previously described.…”

Section: Precursor Synthesesmentioning

confidence: 99%

Design, syntheses and applications of chemical precursors to advanced ceramic materials in nanostructured forms

Sneddon

Pender

Forsthoefel

et al. 2005

Journal of the European Ceramic Society

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New Routes to Organodecaborane Polymers via Ruthenium-Catalyzed Ring-Opening Metathesis Polymerization

Cited by 34 publications

References 7 publications

Synthesis and characterization of B–C polymer hollow microspheres from a new organodecaborane preceramic polymer

Synthesis and characterization of B–C polymer hollow microspheres from a new organodecaborane preceramic polymer

Preparation of Boron‐Carbide/Carbon Nanofibers from a Poly(norbornenyldecaborane) Single‐Source Precursor via Electrostatic Spinning

Design, syntheses and applications of chemical precursors to advanced ceramic materials in nanostructured forms

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