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Volumn 15, Issue 7, 1999, Pages 2241-2245

Organogels resulting from competing self-assembly units in the gelator: Structure, dynamics, and photophysical behavior of gels formed from cholesterol-stilbene and cholesterol-squaraine gelators

Author keywords

[No Author keywords available]

Indexed keywords

ATOMIC FORCE MICROSCOPY; CHOLESTEROL; DYES; FLUORESCENCE; GELATION; MOLECULAR DYNAMICS; MOLECULAR STRUCTURE; SOLVENTS;

EID: 0345669117     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la981386i     Document Type: Article
Times cited : (194)

References (35)
  • 26
    • 0344225439 scopus 로고    scopus 로고
    • The excitation wavelength for both gels and sols is 320 nm where there is similar optical density for both forms; fluorescence intensities are compared at their respective maxima (Figure 1)
    • The excitation wavelength for both gels and sols is 320 nm where there is similar optical density for both forms; fluorescence intensities are compared at their respective maxima (Figure 1).
  • 29
    • 0344656876 scopus 로고    scopus 로고
    • note
    • The highly oriented pyrolitic graphite (HOPG) substrate was spotted with hot gelator solution and allowed to cool in a sealed chamber for 45 min. Under these conditions minimal evaporation was observed. Both pure solvent and the solvent-gelator solution completely "wet" this substrate. We estimate the film thickness to be 5-10 mM; under these conditions we presume that dewetting plays little role in the structure formation observed. The images were obtained in the tapping mode.
  • 31
    • 0345087723 scopus 로고    scopus 로고
    • The concentration of the gelator is critical for obtaining these "fibers"; at lower concentrations the gels are not sufficiently stable, while at higher concentrations it is difficult to "pull" out the strings. The fibers are relatively elastic and easily distorted by pressure
    • The concentration of the gelator is critical for obtaining these "fibers"; at lower concentrations the gels are not sufficiently stable, while at higher concentrations it is difficult to "pull" out the strings. The fibers are relatively elastic and easily distorted by pressure.
  • 32
    • 0344225440 scopus 로고    scopus 로고
    • note
    • In the case of 4 we actually observe a small decrease in fluorescent lifetime upon gelation, which may suggest an increase in self- or impurity-quenching which might be attributed to an increase in concentration upon gelation as pure solvent is incorporated into the "scaffolding" while the remaining "solution" is enriched in solute.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.