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Volumn 12, Issue 25, 2006, Pages 6542-6551

Covalent connection of individualized, neutral, dendronized polymers on a solid substrate using a scanning force microscope

Author keywords

Dendrons; Fluorescence spectroscopy; Polymers; Scanning force microscopy; Single molecule studies

Indexed keywords

CHEMICAL BONDS; FLUORESCENCE; MICROSCOPIC EXAMINATION; MOLECULAR STRUCTURE; SUBSTRATES; SYNTHESIS (CHEMICAL);

EID: 33748548745     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.200600171     Document Type: Article
Times cited : (31)

References (26)
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    • (2003) Angew. Chem. Int. Ed. , vol.42 , pp. 1932-1935
  • 9
    • 33748581506 scopus 로고    scopus 로고
    • note
    • We assume that in previously described experiments (refs. [2,9]) impurities also formed an ultrathin organic coating on HOPG. Given the complexity and the unspecific host capability of higher generation denpols, the presence of impurities stemming from solvents and reagents used during synthesis cannot be excluded even if several purification steps are applied. Carefully dried denpols give correct data in combustion analysis. This, however, is insufficient evidence to propose that there are no impurities still being entrapped in the branched layer around the backbone. The amount of material required to form a monolayer on a solid substrate is so small that it cannot possibly be detected by combustion analysis. The experiments described in references [2] and [9] were carried out with denpols prepared on the solid substrate directly from the reaction mixture. It is therefore necessary to assume that products from the final azidification step have interfered in one way or another with both the adsorption to and lateral diffusion of the denpols on the surface. A main advantage of the experiments described here is the fact that they can be carried out under ambient conditions. The price to be paid for this, and thus a further complication, is the unclear situation with adsorptions of compounds contained in the surrounding air prior to the application of the denpols.
  • 18
    • 33748557086 scopus 로고    scopus 로고
    • R. Al-Hellani, A. D. Schlüter, unpublished results
    • R. Al-Hellani, A. D. Schlüter, unpublished results.
  • 20
    • 0035905423 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2001, 40, 4666-4669.
    • (2001) Angew. Chem. Int. Ed. , vol.40 , pp. 4666-4669
  • 22
    • 25444471047 scopus 로고    scopus 로고
    • The yield for this compound by mistake was given as 95%: S. Müller, A. D. Schlüter, Chem. Eur. J. 2005, 11, 5589-5610. The fully reproducible value is 65%, which was obtained in runs with up to 25 g of product.
    • (2005) Chem. Eur. J. , vol.11 , pp. 5589-5610
    • Müller, S.1    Schlüter, A.D.2
  • 24
  • 25
    • 33748576097 scopus 로고    scopus 로고
    • note
    • During the synthesis of model compound 2c it was observed that if the reaction was performed at 0°C, the amines were doubly dansylated to a small extent (NMR spectroscopy). This is why, under the more forceful conditions, the temperature was not elevated above -10°C.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.