• 제목/요약/키워드: Coordination polymer

검색결과 126건 처리시간 0.04초

Novel Lanthanide Coordination Polymers Prepared by Microwave Heating: [Ln(L)3(H2O)2](H2O)3 (Ln = Eu, Tb, Gd; L = trans-(3-py)-CH=CH-COO)

  • Han, Sun-Hwa;Zheng, Zhen Nu;Cho, Sung-Il;Lee, Soon-W.
    • Bulletin of the Korean Chemical Society
    • /
    • 제33권6호
    • /
    • pp.2017-2022
    • /
    • 2012

  • Three isostructural lanthanide coordination polymers, $[Ln(L)_3(H_2O)_2](H_2O)_3$ {Ln = Eu (1), Tb (2), Gd (3); L = $trans$-3-(3-pyridyl)acrylate, (3-py)-CH=CH-COO}, were prepared from HL, lanthanide nitrate, and NaOH in $H_2O$ by microwave heating. In all coordination polymers, the metal is bonded to eight oxygen atoms, and all pyridyl nitrogen atoms do not coordinate to the metals. All polymers have a 1-D loop-connected chain structure. The hydrogen atoms in the aqua ligands and lattice water molecules all participate in the hydrogen bonds of the O-$H{\cdots}O$ or O-$H{\cdots}N$ type. The hydrogen bonds connect the 1-D chains to create a 2-D network. Polymer 1 exhibited red luminescence in the solid state at room temperature.

  • https://doi.org/10.5012/bkcs.2012.33.6.2017 인용 PDF KSCI

Reaction and Coordination Chemistry of Ferrocenylaminophosphines with Iron Carbonyls

  • Tae-Jeong Kim;Soon-Chul Kwon;Yong-Hoon Kim;Dong-Ho Lee
    • Bulletin of the Korean Chemical Society
    • /
    • 제12권3호
    • /
    • pp.332-334
    • /
    • 1991

  • The reaction and coordination chemistry of chiral ferrocenylaminophosphines such as 2-(diphenylphosphino)-1-(N,N-dimethylaminoethyl) ferrocene (PPFA), and 1',2-bis(diphenylphosphino)-l-(N,N-dimethylaminoe thyl) ferrocene (BPPFA), with various iron carbonyls have been investigated. PPFA reacted with iron carbonyls, Fe$(CO)_5$, $Fe_2(CO)_9$, or $Fe_3(CO)_{12}$ to give an iron complex of the type (${\eta}^1$-PPFA-P)Fe$(CO)_4$ (1) as a single product regardless the choice of the iron carbonyls. The bisphosphine ligand BPPFA afforded two products (${\eta}^1$-BPPFA-P)Fe$(CO)_4$ (2) and (${\mu}$,${\eta}^1$-BPPFA-P,P)$Fe_2(CO)_8$ (3) in which BPPFA acts as a monodentate and a bridging ligand, respectively. In all cases coordination to the -Fe$(CO)_4$ moiety is made through the phosphine rather than the amino group and, in the case of 2, the coordination is made through the phosphine substituted at the $C_5H_4$ ring to reduce the steric congestion.

  • https://doi.org/10.5012/bkcs.1991.12.3.332 인용 PDF

Bifunctional Perfluoroaryl Boranes as Cationic Initiators for Isobutylene Polymerization

  • Piers Warren E.;Chase Preston A.;Henderson Lee, D.;Sciarone Timo;Collins Scott;Chai, Jianfang;Parvez Masood
    • 한국고분자학회:학술대회논문집
    • /
    • 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
    • /
    • pp.150-151
    • /
    • 2006

  • Perfluoroaryl boranes are widely employed as co-catalysts in olefin polymerization processes. Perfluoroaryl diboranes, possessing borane centers in close proximity, are a subclass of this family of compounds that are in theory capable of chelating neutral and anionic bases. The resulting anions are exceptionally weakly coordinating. We have prepared examples of such compounds and studied their coordination behavior with neutral Lewis bases that have the capability to bridge Lewis acid sites in an effort to delineate the kinetic and thermodynamic factors that influence bonding mode. When protic Lewis bases such as alcohols or water are reacted with diboranes, strong Bronsted acids capable of initiating cationic polymerizations under unusual conditions result.

  • PDF