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Volumn 18, Issue 16, 2006, Pages 3602-3604

Bistable polymorphs showing diamagnetic and paramagnetic states of an organic crystalline biradical biphenyl-3,5-diyl bis(tert-butylnitroxide)

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL BONDS; CRYSTALLINE MATERIALS; CRYSTALLIZATION; DIAMAGNETISM; DIFFERENTIAL SCANNING CALORIMETRY; ELECTRON ENERGY LEVELS; MAGNETIC PROPERTIES; PARAMAGNETISM; THERMAL EFFECTS; X RAY POWDER DIFFRACTION;

EID: 33748253949     PISSN: 08974756     EISSN: None     Source Type: Journal    
DOI: 10.1021/cm061222k     Document Type: Article
Times cited : (40)

References (23)
  • 1
    • 0004056023 scopus 로고    scopus 로고
    • Itoh, K., Kinoshita, M., Eds. Kodansha Gordon & Breach: Tokyo
    • Itoh, K., Kinoshita, M., Eds. Molecular Magnetism -New Magnetic Materials; Kodansha Gordon & Breach: Tokyo, 2000.
    • (2000) Molecular Magnetism-new Magnetic Materials
  • 14
    • 33748248829 scopus 로고    scopus 로고
    • note
    • Using a "seed" obtained after the thermal experiments of BPBN facilitated the preferential recrystallization of the β-phase.
  • 15
    • 33748283948 scopus 로고    scopus 로고
    • note
    • 2) (all data) = 0.1001 for 4141 unique reflections. We found an anomaly of the residual electron density in the differential Fourier map and assumed the presence of a small portion of an isomeric and diamagnetic 3-tert-butylamino-5- phenyl-1,4-quinone-1-tert-butyliminoxide as a lattice defect. We applied a disorder model at the relating O and H atoms, and their occupancy parameter was included in the refinement. The purity of β-BPBN was determined to be 94.4%, being consistent with the magnetic measurements within an experimental error. The minor impurity might be formed via a thermal disproportionation process giving quinone imine N-oxides and N-tert-butylanilines.
  • 19
    • 33748278737 scopus 로고    scopus 로고
    • note
    • -1 in DSC measurements.
  • 22
    • 33748278199 scopus 로고    scopus 로고
    • note
    • -1 from 70 to 80 °C.
  • 23
    • 33748281967 scopus 로고    scopus 로고
    • note
    • A laser beam was introduced into a Quantum Design MPMS-7 SQUID probe through a quartz optical fiber. The light source was a CrystalLaser GCL-150-M (532 nm; diode-pumped green laser). The quartz fiber was purchased from Fujikura (large-core fiber S.800/1000; core diameter 800 μm). The polycrystalline specimen of α-BPBN was stuck on a small piece of a polyimide Kapton tape (duPont). The precise mass of BPBN was estimated from the magnetic susceptibility.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.