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Volumn 71, Issue 22, 2006, Pages 8523-8531

Structural effects on the ground and excited-state properties of photoswitchable hydrogen-bonding receptors

Author keywords

[No Author keywords available]

Indexed keywords

CHROMOPHORES; DIMERIZATION; GROUND STATE; PHOTOCHROMISM; REACTION KINETICS; STRUCTURE (COMPOSITION);

EID: 33750481900     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo061528a     Document Type: Article
Times cited : (62)

References (69)
  • 3
    • 0242323642 scopus 로고    scopus 로고
    • For a review of switchable binding processes at a surface, see: Cooke, G. Angew. Chem., Int. Ed. 2003, 42, 4860.
    • (2003) Angew. Chem., Int. Ed. , vol.42 , pp. 4860
    • Cooke, G.1
  • 7
    • 33645342725 scopus 로고    scopus 로고
    • For a recent review of switchable processes in rotaxanes, see: Tian, H.; Wang, Q. C. Chem. Soc. Rev. 2006, 35, 361.
    • (2006) Chem. Soc. Rev. , vol.35 , pp. 361
    • Tian, H.1    Wang, Q.C.2
  • 8
    • 28044468193 scopus 로고    scopus 로고
    • and references therein
    • For recent examples of substrate-switched (e.g., allosteric) binding, see: (a) Abe, H.; Masuda, N.; Waki, M.; Inouye, M. J. Am. Chem. Soc. 2005, 127, 16189 and references therein.
    • (2005) J. Am. Chem. Soc. , vol.127 , pp. 16189
    • Abe, H.1    Masuda, N.2    Waki, M.3    Inouye, M.4
  • 22
  • 36
    • 17044460163 scopus 로고    scopus 로고
    • For other examples of photoswitched cation binding via anthracene photodimerization, see: (a) Schafer, C.; Mattay, J. Photochem. Photobiol. Sci. 2004, 3, 331.
    • (2004) Photochem. Photobiol. Sci. , vol.3 , pp. 331
    • Schafer, C.1    Mattay, J.2
  • 55
    • 33750486374 scopus 로고    scopus 로고
    • note
    • No significant changes in the percentage fatigue were found from cycling in the presence of an excess amount of barbital.
  • 58
    • 0008028081 scopus 로고    scopus 로고
    • Mazaryle University: Brno, Moravia, Czech Republic
    • (b) Havel, J. Haltafal-Spefo program; Mazaryle University: Brno, Moravia, Czech Republic.
    • Haltafal-Spefo Program
    • Havel, J.1
  • 60
    • 33750451786 scopus 로고    scopus 로고
    • note
    • The H-bonded amide proton at 9.5 ppm in T4C underwent an upfield shift of 0.15 ppm upon the addition of 5 equiv of barbital to indicate a disruption of the intermolecular H-bonding interactions. Complexation of barbital also affected the signal for the isophthaloyl proton of each receptor, which moved downfield due to its proximity to the apical CO of guest (e.g., +0.2, +0.1. and +0.16 ppm. respectively, for T3, T3C, and T6C).
  • 63
    • 33750456805 scopus 로고    scopus 로고
    • note
    • It is also possible that the excimer is in equilibrium with the locally excited-state.
  • 64
    • 33750456722 scopus 로고    scopus 로고
    • note
    • The reduced spacer length in T1 is expected to limit the mobility of the chromophores due to restricted conformational freedom of the amide linker. The ensuing biexponential decay may be due to the presence of excimer fluorescence or kinetically distinct nonequilibrating locally excited-states.
  • 66
    • 33750462191 scopus 로고    scopus 로고
    • note
    • In the case of T6C, the addition of barbital also had a significant effect on the shift of other proton signals. In particular, the signals for the OCH2 and the central photodimer CH protons moved downfield by +0.37 and +0.17 ppm, respectively.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.