Ring-Opening Metathesis Polymerization of Phosphazene-Functionalized Norbornenes

Allcock, Harry R.; Laredo, Walter R.; deDenus, Christine R.; Taylor, Jonathan P.

doi:10.1021/ma990752h

Cited by 42 publications

(42 citation statements)

References 28 publications

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“…It has also been used in the construction of more complicated polymeric architectures such as cyclo linear [3] and dendritic [4] as well as being incorporated into linear carbon based polymers as pendant groups [5]. In each of these cases however the synthesis of the desired phosphazene based A x B y monomer is hindered by the ability to control the substitution pattern during desymmetrisation of the trimer.…”

Section: Resultsmentioning

confidence: 99%

Towards Cyclophosphazene Based Dendrimers For Energetic Binders

et al. 2005

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Section: Resultsmentioning

confidence: 99%

Towards Cyclophosphazene Based Dendrimers For Energetic Binders

et al. 2005

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“…Tetrabutylammonium bromide (TBAB) was , [29] 4-(4-hydroxyphenyl)-6-phenyl-2,2Ј-bipyridine (HOPhbpyPh), [61] [(L-H)PtCl] (L = HOPhbpyPh), [7] [Pt(PhCN) 2 Cl 2 ], [62] [Pd(PhCN) 2 Cl 2 ], [63] N 3 P 3 (OPh) 5 Cl (OPh = phenoxy), [64] N 3 P 3 (biph) 2 Cl 2 (biph = 2,2Ј-oxybiphenyl),…”

Section: Methodsmentioning

confidence: 99%

Spectroscopic Studies of Phosphazene Polymers Containing Photoluminescent Metal Complexes

et al. 2011

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A series of small phosphazene ligands with pendant 6‐phenyl‐2,2′‐bipyridyl moieties, namely L1 [N3P3(OPh)5(OPhbpyPh)], L2 [N3P3(biph)2(OPhbpyPh)2], L3 [N3P3(tBubiph)2(OPhbpyPh)2], L4 [N3P3(biph)2(OPhbpyPh)Cl] and L5 [N3P3(biph)2(OPhbpyPh)(OPh)] [OPhbpyPh = 4‐(4‐phenoxy)‐6‐phenyl‐2,2′‐bipyridine, OPh = phenoxy, biph = 2,2′‐oxybiphenyl and tBubiph = 4,4′‐di‐tert‐butyl‐2,2′‐oxybiphenyl], have been used to synthesise the new cyclometallated palladium(II) and platinum(II) complexes [(L1‐H)PdCl], [(L1‐H)PtCl], [(L1‐H)(PdCl)2], [(L3‐H)(PdCl)2], [(L4‐H)PtCl], [(L5‐H)PtCl] and the rhenium(I) complex [L5Re(CO)3Cl]. Single‐crystal X‐ray diffraction analysis was performed on the free ligand L2 and the palladium complexes [(L1‐H)PdCl] and [(L3‐H)(PdCl)2]. In both PdII complexes, the metal centre lies in a distorted square‐planar geometry with an “N2CCl” donor set confirming the cyclopalladation. The ligand pendant arms are involved in intermolecular stacking interactions with adjacent molecules. A polyphosphazene (L6) with 4‐tert‐butylphenoxy (OtBuPh) and the potential donor OPhbpyPh as pendant groups was prepared and used to synthesise metallopolymers with ReI and PtII. Spectroscopic and computational studies were conducted to compare the discrete complexes with the polymers with similar metal pendants as well as to model compounds in the literature. By using UV/Vis and resonance Raman spectroscopic techniques it was found that very few deviations from known metal chromophores exist for both the triphosphazene‐ and polyphosphazene‐based complexes. The transient resonance Raman spectra of the PtII complexes revealed a ligand radical anion signature associated with the N2C unit.

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“…This approach can yield a variety of functionalized polymers. An organic polymer system that is described here is based on the polynorbornene skeleton, which is accessible by ring opening metathesis polymerization (ROMP) [19,20]. The organometallic-catalyzed ROMP is a useful synthetic approach in the sense that it gives good control over the molecular weight of the polymer while maintaining a high reaction rate, which leads ultimately to a stable performance of the resulting material and ease of scale-up for industrial manufacturing.…”

Section: Introductionmentioning

confidence: 99%