Advanced search×

Ferromagnetic spin coupling between endohedral metallofullerene La@C82 and a cyclodimeric copper porphyrin upon inclusion.

Fatin F Hajjaj, Kentaro K Tashiro, Hidefumi H Nikawa, Naomi N Mizorogi, Takeshi T Akasaka, Shigeru S Nagase, Ko K Furukawa, Tatsuhisa T Kato, and Takuzo T Aida

J Am Chem Soc 133(24):9290-2 (2011) PMID 21599021

The cyclic host cyclo-[P(Cu)](2) carrying two covalently connected Cu(II) porphyrin units can accommodate La@C(82), a paramagnetic endohedral metallofullerene, in its cavity to form the inclusion complex cyclo-[P(Cu)](2)⊃La@C(82), which can be transformed into the caged complex cage-[P(Cu)](2)⊃La@C(82) by ring-closing olefin metathesis of its side-chain olefinic termini. On the basis of electron spin resonance (ESR) and electron spin transient nutation (ESTN) studies, cyclo-[P(Cu)](2)⊃La@C(82) is the first ferromagnetically coupled inclusion complex featuring La@C(82), whereas cage-[P(Cu)](2)⊃La@C(82) is ferrimagnetic.

DOI: 10.1021/ja203491s
Version: za2963e q8za6 q8zba q8zcd q8zd3 q8ze1 q8zf2 q8zgf

Similar articles you may find interesting…

  1. Electron- or hole-transporting nature selected by side-chain-directed π-stacking geometry: liquid crystalline fused metalloporphyrin dimers.
    Tsuneaki T Sakurai, Kentaro K Tashiro, ... Takuzo T Aida

    J Am Chem Soc 133(17):6537-40 (2011) PMID 21476548

    Novel liquid crystalline (LC) semiconductors were prepared from the copper complex of a fused porphyrin dimer as the electroactive core by attaching to its periphery dodecyl and semifluoroalkyl side chains site-specifically (P≡P(hetero)) and semifluoroalkyl side chains alone (P≡P...
  2. Are PEI-coated SWCNTs conjugated with hepatitis A virus? A chemical study with SEM, Z-potential, EDXD and RT-PCR.
    M M Carbone, F F Valentini, ... G G Palleschi

    Audio, Transactions of the IRE Professional... 5(3):35001 (2010) PMID 20404402

    The conjugation between nanotubes, coated with different doses of polyethylene imine (PEI) and hepatitis A virus (HAV) was investigated by scanning electron microscopy, Z-potential, thermogravimetric and differential thermal analysis, transmission electron microscopy, energy dispersive x-ray diffrac...
  3. Columnarly assembled liquid-crystalline peptidic macrocycles unidirectionally orientable over a large area by an electric field.
    Kohei K Sato, Yoshimitsu Y Itoh, and Takuzo T Aida

    J Am Chem Soc 133(35):13767-9 (2011) PMID 21627140

    We developed liquid crystalline (LC) compounds 1 and 2 that are capable of self-assembling into a hexagonal columnar mesophase over a wide temperature range including room temperature. Their bowl-shaped macrocyclic cores are conformationally robust due to the presence of internal H-bon...