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Volumn 11, Issue 18, 2005, Pages 5353-5361

Cyclohexane-based low molecular weight hydrogelators: A chirality investigation

Author keywords

Amino acids; Chirality; Cyclohexane; Gels; Self assembly

Indexed keywords

AMINO ACIDS; CONCENTRATION (PROCESS); CRYSTALLIZATION; GELS; MIXTURES; MOLECULAR WEIGHT; SELF ASSEMBLY; SUPERCONDUCTING TRANSITION TEMPERATURE; TRANSMISSION ELECTRON MICROSCOPY; WATER;

EID: 24644511162     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/chem.200500007     Document Type: Article
Times cited : (68)

References (34)
  • 14
    • 4544280104 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2004, 43, 1663-1667.
    • (2004) Angew. Chem. Int. Ed. , vol.43 , pp. 1663-1667
  • 23
    • 24644518838 scopus 로고    scopus 로고
    • note
    • [1]
  • 24
    • 24644492240 scopus 로고    scopus 로고
    • note
    • The racemic mixture that was obtained by carrying out the synthesis with racemic phenylalanine, was also capable of gelating water with a cgc similar to that of the pure heterochiral gelators LLD and DDL. However, the appearance of the gels was turbid to white, depending on the concentration, due to the presence of needle-like crystalline material from the homochiral components, LLL and ODD. Such crystalline material was observable with the naked eye and was birefringent when observed by optical microscopy.
  • 28
    • 24644483533 scopus 로고    scopus 로고
    • note
    • The spectra of LLD and DDL showed slight differences around the 200-225 nm due to noise that can occur in this spectral region.
  • 30
    • 24644472810 scopus 로고    scopus 로고
    • note
    • gs of a 2.40 ITIM LLD sample as measured by the dropping ball method should be between 60 and 120°C. Temperature-dependent CD spectroscopy was attempted with 3 mM samples, however, no effect was observed due to the very high temperature necessary to melt the gel. Experiments at gelator concentrations below 2 mM were not carried out due to the very small temperature range available for the measurement. LLD solutions did not give rise to CD signals.
  • 31
    • 24644450550 scopus 로고    scopus 로고
    • note
    • All CD spectroscopy experiments, excluding temperature-dependent experiments, were carried out at three different concentrations: 1.5, 2.4, and 5.3 HIM; however, no significant differences were observed in the obtained spectra. For mixed gel samples containing gelators (LLD or DDL) and nongelators (LLL or DDD) the CD signal intensities were considerably lower than for samples containing only gelators (LLD or DDL) due to increased turbidity of the mixed samples with respect to the pure gelator samples.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.