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Volumn , Issue 9, 2000, Pages 1969-1975

Novel photo-responsive organic spin systems: Preparation and properties of norbornadienes and spiropyrans with TEMPO radical substituents

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL BONDS; CRYSTALLIZATION; DYES; FREE RADICALS; ISOMERIZATION; MAGNETIC PROPERTIES; MOLECULAR DYNAMICS; MOLECULAR STRUCTURE; THERMAL EFFECTS; X RAY ANALYSIS;

EID: 0034286447     PISSN: 03009580     EISSN: None     Source Type: Journal    
DOI: 10.1039/b001993n     Document Type: Article
Times cited : (45)

References (29)
  • 16
    • 0010911067 scopus 로고    scopus 로고
    • note
    • Portions of this work were presented at the 14th International Conference on the Chemistry of the Organic Solid State held in Cambridge, UK, August 1999 and the 3rd International Symposium on Organic Photochromism held in Fukuoka, November 1999. Each paper is to be published in the special volume of Mol. Cryst. Liq. Cryst., as a proceeding.
  • 17
    • 0010911891 scopus 로고    scopus 로고
    • note
    • At first, the MM2 calculation was carried out with no information of X-ray data to give the results described in text. However, when the X-ray data of Ib (space group, lattice parameters, atomic coordinates, etc.) was taken into account, closer values to the observed data for Ib were obtained. For example, the bond angle around (C5′), i.e., (C4′)-(C5′)-(C8′) was calculated to be 125.3°, which is a slightly larger value than the observed one. We thank a referee for a helpful comment on this point.
  • 21
    • 0010855341 scopus 로고    scopus 로고
    • note
    • Other bond angles around the carbon atom (C5′) bearing the substituents are as follows: C8′-C5′-C6′ 124.5(2)°, C8′-C5′-C1′ 131.3(2)°, C1′-C5′-C4′ 104.1(2)°, C1′-C5′-C6′ 89.7(2)°, C4′-C5′-C6′ 58.1(2)°.
  • 27
    • 0010916093 scopus 로고    scopus 로고
    • note
    • Although the exact conformations of IVb and Vb are still unknown, the structures of the dyes are assumed to have the s-trans conformations as for normal spiropyran derivatives.
  • 29
    • 85088685500 scopus 로고    scopus 로고
    • note
    • -1 for S = 1/2 spin and the partial loss of the spins of IVb and Vb is considered to be possibly based on the unstable nature of IVb and Vb in the solid state because a further decrease of their Curie constants was observed by repeated measurement of the same sample after a month.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.