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Volumn 23, Issue 17, 2007, Pages 8866-8875

4-mercaptophenylboronic acid SAMs on gold: Comparison with SAMs derived from thiophenol, 4-mercaptophenol, and 4-mercaptobenzoic acid

Author keywords

[No Author keywords available]

Indexed keywords

CONTACT-ANGLE GONIOMETRY; FILM COMPOSITION; SURFACE COVERAGE;

EID: 34548057064     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la7007733     Document Type: Article
Times cited : (112)

References (84)
  • 10
  • 47
    • 34548086939 scopus 로고    scopus 로고
    • A comparison of the effective dipole moments of the adsorbates (TP = 1.2 D, MP = 1.5 D, MBA = 1.0 D, MPBA = 1.7 D) reveals that MPBA possesses the largest dipole. McClellan, A. L. Tables of Experimental Dipole Moments; Freeman: San Francisco, 1963.
    • A comparison of the effective dipole moments of the adsorbates (TP = 1.2 D, MP = 1.5 D, MBA = 1.0 D, MPBA = 1.7 D) reveals that MPBA possesses the largest dipole. McClellan, A. L. Tables of Experimental Dipole Moments; Freeman: San Francisco, 1963.
  • 57
    • 34548086151 scopus 로고    scopus 로고
    • The anomalously high contact angle for HD on the MBA SAM might arise from the enhanced absorption of hydrocarbon-based contaminants on the surface of this SAM. The enhanced adsorption of contaminants is plausibly driven by the higher surface free energy of this SAM compared to that of the others. See, for example, Berg, J. C, Ed. Wettability; Marcel Dekker: New York, 1993
    • The anomalously high contact angle for HD on the MBA SAM might arise from the enhanced absorption of hydrocarbon-based contaminants on the surface of this SAM. The enhanced adsorption of contaminants is plausibly driven by the higher surface free energy of this SAM compared to that of the others. See, for example, Berg, J. C., Ed. Wettability; Marcel Dekker: New York, 1993.
  • 69
    • 34548106260 scopus 로고    scopus 로고
    • Even though we were able to observe a wide hydroxyl band over 3000 cm-1, this band could be due to water contamination on this high-energy surface rather than the hydroxyl group from the boronic acid
    • -1, this band could be due to water contamination on this high-energy surface rather than the hydroxyl group from the boronic acid.
  • 72
    • 34548059970 scopus 로고    scopus 로고
    • Although the baseline in the spectrum of MPBA is unusually noisy at 165 eV, we note that other high-resolution XPS spectra of this SAM collected previously and not subjected to peak deconvolution showed zero intensity at this binding energy
    • Although the baseline in the spectrum of MPBA is unusually noisy at 165 eV, we note that other high-resolution XPS spectra of this SAM collected previously and not subjected to peak deconvolution showed zero intensity at this binding energy.
  • 77
    • 34548095312 scopus 로고    scopus 로고
    • To ensure of the validity of our boron-to-oxygen ratio, several tests were performed. First, the degree of oxygen contamination was carefully monitored using thiophenol as a reference. Second, the monolayer was formed using both anhydride and free acid, yielding no difference in the ratio. Third, the synthesized boronic acid and the purchased sample showed identical results
    • To ensure of the validity of our boron-to-oxygen ratio, several tests were performed. First, the degree of oxygen contamination was carefully monitored using thiophenol as a reference. Second, the monolayer was formed using both anhydride and free acid, yielding no difference in the ratio. Third, the synthesized boronic acid and the purchased sample showed identical results.
  • 78
    • 34548102621 scopus 로고    scopus 로고
    • XPS cannot probe the concentration of elemental hydrogen. We note that the difference in electronegativity between hydrogen and boron (1.85 and 2.05 on the Pauling scale, respectively)79 is insufficient to produce any shift in binding energy for O Is between boronic and boroxine
    • 79 is insufficient to produce any shift in binding energy for O Is between boronic and boroxine.
  • 83
    • 34548067879 scopus 로고    scopus 로고
    • The use of deoxygenated water had no effect on the outcome of the hydrolysis. The presence of trace amounts of oxygen, however, cannot be ruled out
    • The use of deoxygenated water had no effect on the outcome of the hydrolysis. The presence of trace amounts of oxygen, however, cannot be ruled out.
  • 84
    • 34548088061 scopus 로고    scopus 로고
    • Please see reference 20 and references therein
    • Please see reference 20 and references therein.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.