Microporous polycarbazole via straightforward carbazole-based oxidative coupling polymerization is reported. The synthesis route exhibits cost-effective advantages, which are essential for scale-up preparation. The Brunauer-Emmett-Teller specific surface area for obtained polymer is up to 2220 m(2) g(-1). Gas (H(2) and CO(2)) adsorption isotherms show that its hydrogen storage can reach to 2.80 wt % (1.0 bar and 77 K) and the uptake capacity for carbon dioxide is up to 21.2 wt % (1.0 bar and 273 K), which show a promising potential for clean energy application and environmental field. Furthermore, the high selectivity toward CO(2) over N(2) and CH(4) makes the obtained polymer possess potential application in gas separation.

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Hexaphenylbenzene-based porous organic polymers are prepared smoothly through palladium-catalyzed CÀC coupling polymerization. According to the obtained nitrogen physisorption isotherms, the Bru-nauerÀEmmettÀTeller specific surface area for these polymers varies between 742 and 1148 m 2 g À1 . Gravimetric hydrogen adsorption isotherms show that the adsorption capacity for hydrogen is up to 1.5 wt % at 1.13 bar and 77 K. Thanks to the propeller-like structure, unique electronic feature, and efficient preparation, hexaphenylbenzene can be taken as a promising building block for designing porous polymers with special properties.

An efficient synthetic procedure for the preparation of fused 2,3-dihydrofuran derivatives was developed with the assistance of pyridinium ylide. A sequential one-pot, two-step tandem reaction starting from pyridine, aromatic aldehyde, dimedone, or 4-hydroxycoumarin and alpha-phenacyl bromide or p-nitrobenzyl bromide with triethylamine as catalyst proceeded smoothly in acetonitrile. (1)H NMR spectroscopy and single-crystal analysis demonstrated that the obtained 2,3-dihydrofurans are trans isomers.

The three-component reactions of aromatic aldehydes, arylamines, and acetylenedicarboxylates show very interesting molecular diversity. In an aqueous ethanol solution the threecomponent reaction gave polysubstituted 2-hydroxyhydropyridines. In absolute ethanol 1,4-dihydropyridines were

Preparation and sorption properties of spiro(fluorene-9,9′-xanthene)-based porous organic polymers (SPOPs) are reported for the first time. Using a same linker monomer, the micropore size and specific surface area in SPOPs are tunable by variation of the structure of core building blocks. According to the obtained nitrogen physisorption isotherms, the Brunauer–Emmett–Teller specific surface area for these polymers varies between 750 and 1020 m2 g–1. Copolymer SPOP-3 containing spiro(fluorene-9,9′-xanthene) and spirobifluorene with 1:1 ratio, prepared through Suzuki coupling polymerization, possesses 2.22 wt % hydrogen adsorption capacity at 1.0 bar and 77 K, which not only is the exceptional uptake capacity for hydrogen at low pressure among the best reported results for organic polymers but also can be competitive with other kinds of porous materials such as activated carbons and metal–organic frameworks.

The CO-bridged anions [(µ-RE)(µ-CO)Fe 2 (CO) 6 ] -reacted with S 8 to form the sulfur-centered anions (µ-RE)(µ-S -)Fe 2 (CO) 6 (4; E ) S, Se), whereas reaction of the anions with Se 8 yielded the selenium-centered anions (µ-RE)(µ-Se -)Fe 2 (CO) 6 (6; E ) S, Se). Interestingly, reaction of 4 with SO 2 Cl 2 afforded the S-S-bonded clusters [(µ-RE)Fe 2 (CO) 6 ] 2 (µ-S-S) (5), whereas reaction of 6 with SO 2 Cl 2 produced the µ 4 -Se clusters [(µ-RE)Fe 2 (CO) 6 ] 2 (µ 4 -Se) (8); clusters 8 could also be produced by the action of anions 6 on succinoyl chloride or p-phthaloyl chloride, while the µ 4 -S clusters [(µ-RE)Fe 2 (CO) 6 ] 2 (µ 4 -S) (9) were generated by reaction of anions 4 with the above organic bis acid chlorides under similar conditions. Also, reaction of 4 (E ) S) with p-MeC 6 H 4 SO 2 Cl gave the µ 4 -S clusters [(µ-RE)Fe 2 (CO) 6 ] 2 (µ 4 -S) (9; E ) S) and the expected Fe 2 S 2 butterfly clusters (µ-RE)(µ-p-MeC 6 H 4 SO 2 S)Fe 2 (CO) 6 ( 10), whereas anion 6 reacted with p-MeC 6 H 4 SO 2 Cl to afford the unexpected SdO-bridged complexes (µ-RE)(µ-p-MeC 6 H 4 SO 2 )Fe 2 (CO) 6 (11) and µ 4 -Se clusters 8. Clusters 11 could be also prepared through direct reaction of the precursor of 6, i.e. [(µ-RE)(µ-CO)Fe 2 (CO) 6 ] -, with p-MeC 6 H 4 SO 2 Cl. For some of these reactions the mechanisms were preliminarily proposed. The structures of 15 new cluster compounds have been characterized by C/H analysis and IR, 1 H NMR, and MS spectroscopy; those of [(µ-EtS)Fe 2 (CO) 6 ] 2 (µ 4 -Se) (8a) and (µ-EtS)(µ-p-MeC 6 H 4 SO 2 )Fe 2 (CO) 6 (11a) have been confirmed by X-ray diffraction analyses.

The tetranion ligand η -C B H has been observed for the first time in 1, which was obtained from the reaction of o-C B H with excess K metal followed by treatment with UCl . As shown in the picture (without K cations and coordinated THF molecules), 1 is a centrosymmetric dimer with a bent sandwich structure.