Novel quaternary ammonium functional addition-type norbornene copolymers (Q Cn P(BN/PhBN), n ¼ 1, 6, 10, 12) with different alkyl side chain length comb-shaped structures or different contents of 2-(4-phenylbutoxymethy-lene)-5-norbornene (PhBN) (22-77%) are synthesized via copolymerization of functionalized norbornenes, and their corresponding hydroxide-conductive anion exchange membranes (AEMs) with effective hydrophilic-hydrophobic separation are prepared and confirmed by TEM or SEM. The achieved AEMs show high ion exchange capacity (1.83 mmol g À1 ), as well as low methanol permeability (1.97-20.4 Â 10 À7 cm 2 s À1 ), which are lower than that of Nafion®. The ionic conductivity increases with the operation temperature increasing and is observed up to 4.14 Â 10 À3 S cm À1 . The AEMs exhibit excellent dimensional stability with a swelling degree in plane between 0.9-3.3% and good chemical stability under 6 M NaOH solution even after a month. Membrane electrode assembly (MEA) is fabricated by using the alkalized Q C12 P(BN/PhBN)-77 as the AEM and tested in an alkaline direct methanol fuel cell. The open circuit voltage (OVC) of 0.54 V and the maximum current density of 66 mW cm À2 are achieved at 80 C, respectively. View Article Onlinetechnique. The TEM images of alkalized Q C6 P(BN/PhBN)-22 provide a direct evidence of biphasic morphology for the polymer membranes and exhibit a clear hydrophilic-hydrophobic microphase separation with wormlike and interconnect hydrophilic network nanochannels (Fig. 5d). This unique micromorphology supports sufficient hydroxide conducting through uniformly distributed well-connected ion pathways. The light regions are corresponded to the hydrophobic domains of the P(BN/NB) main chains while the dark regions are corresponded to the hydrophilic PhBN side chains. Fig. 6 shows the TGA data for the comb-shaped copolymers Q Cn P(BN/PhBN) (in OH À form). From the diagram we can know, its decomposition can be divided into four parts in the TGA Scheme 1 Synthesis of comb-shaped P(BN/PhBN), CP(BN/PhBN), and Q Cn P(BN/PhBN) copolymers. Thermal stability and mechanical properties This journal is

Well defined 9-substituted fluorene C-C bridged constrained geometry configuration (CGC) Ni(II) complexes bearing b-ketoiminato-fluorene ligands, {CH 3 C(O)CHC[N(fluorenyl)]-CH 3 } 2 Ni (Ni1) and {CF 3 C(O)CHC[N(fluorenyl)]-CH 3 } 2 Ni (Ni2) were synthesized by coordination reaction and in situ coupling reaction in the presence of (DME)NiBr 2 . The complexes were characterized by NMR and elemental analyses. And the quality Ni1 and Ni2 crystals structure was confirmed from X-ray with C-C bridged constrained geometry configuration. On activation with B(C 6 F 5 ) 3 , the Ni-based complexes showed high catalytic activities for norbornene homo-polymerization, activities up to 10 6 g PNB mol per Ni per h. The copolymerization of 2-heptoxymethylene norbornene (HN) with norbornene by the pre-catalysts Ni1and Ni2 was also explored in the presence of B(C 6 F 5 ) 3 . High molecular weight polymers with unimodal molecular weight distributions were obtained, indicating that the nature of the polymerization was single site. The catalytic activity, co-monomer incorporation and the properties of the resultant polymers can be controlled over a wide range by tuning the catalyst structures and reaction parameters.

Palladium(ii) and copper(ii) chloride complexes bearing bulky 9,10-dihydro-9,10-ethanoanthracene-11,12-diimine ligands were synthesized and sufficiently characterized by elemental and spectroscopic analysis along with X-ray diffraction analysis.

Fluorinated β-ketonaphthyliminate ligand CF 3 C(O)CHC[HN(naphthyl)]CH 3 (L1) and Pd(II) complexes with dichelate fluorinated β-ketonaphthyliminato ligand, {CF 3 C(O)CHC[N(naphthyl)]CH 3 } 2 Pd (C1), as well as with monochelate fluorinated β-ketonaphthyliminato ligand, {CF 3 C(O)CHC[N(naphthyl)]CH 3 }Pd(CH 3 )(PPh 3 ) (C2), were synthesized and their solid-state structures were confirmed using X-ray crystallographic analysis. The Pd(II) complexes were employed as precursors to catalyze norbornene (NB) homo-and copolymerization with ester-functionalized NB derivative using B(C 6 F 5 ) 3 as a co-catalyst. High activity up to 2.3 × 10 5 g polymer mol Pd À1 h À1 for the C1/B(C 6 F 5 ) 3 system and 3.4 × 10 6 g polymer mol Pd À1 h À1 for the C2/B(C 6 F 5 ) 3 system was exhibited in NB homopolymerization. Moreover, the Pd(II) complexes exhibited a high level of tolerance towards the ester-functionalized MB monomer. In comparison with the C1/B(C 6 F 5 ) 3 system, the C2/B (C 6 F 5 ) 3 system exhibited better catalytic property towards the copolymerization of NB with 5-norbornene-2-carboxylic acid methyl ester (NB-COOCH 3 ), and soluble vinyl-addition-type copolymers were obtained with relatively high molecular weights (3.6 × 10 4 -7.5 × 10 4 g mol À1 ) as well as narrow molecular weight distributions (1.49-2.15) depending on the variation of monomer feed ratios. The NB-COOCH 3 insertion ratio in all copolymers could be controlled in the range 2.8-21.0 mol% by tuning a content of 10-50 mol% NB-COOCH 3 in the monomer feed ratios. Copolymerization kinetics were expressed by the NB and NB-COOCH 3 monomer reactivity ratios: r NB-COOCH3 = 0.18, r NB = 1.28 were determined for the C1/B(C 6 F 5 ) 3 system and r NB-COOCH3 = 0.19, r NB = 3.57 for the C2/B(C 6 F 5 ) 3 system using the Kelen-Tüdõs method.