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Volumn 16, Issue 34, 2010, Pages 10439-10446

Sequence, stoichiometry, and dimensionality control in porphyrin/ biscalix[4]arene self-assemblies in aqueous solution

Author keywords

Calixarenes; Light scattering; Noncovalent synthesis; Porphyrinoids; Self assembly

Indexed keywords

ABSORBANCES; AQUEOUS SOLUTIONS; CALIX[4]ARENES; CALIXARENES; HIERARCHICAL CONTROL; MOLECULAR ELEMENTS; MULTIPORPHYRIN; NON-COVALENT SYNTHESIS; PORPHYRINOIDS; SORET BANDS; STEPWISE SYNTHESIS; SUPRA-MOLECULAR NANO STRUCTURES; TEMPLATING AGENTS; UV/ VIS SPECTROSCOPY;

EID: 77956451498     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.201000803     Document Type: Article
Times cited : (29)

References (28)
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    • Angew. Chem. Int. Ed. 2007, 46, 1803-1806.
    • (2007) Angew. Chem. Int. Ed. , vol.46 , pp. 1803-1806
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    • 0035915111 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2001, 40, 4245 -4247;
    • (2001) Angew. Chem. Int. Ed. , vol.40 , pp. 4245-4247
  • 13
    • 77956449449 scopus 로고    scopus 로고
    • We performed both Job plots and titration experiments (see refs. [3a] and [3b]). The titration approach is much more effective than the Job plot and clearly shows all of the species present in solution, whereas the Job plot reveals only the formation of the major ones
    • We performed both Job plots and titration experiments (see refs. [3a] and [3b]). The titration approach is much more effective than the Job plot and clearly shows all of the species present in solution, whereas the Job plot reveals only the formation of the major ones.
  • 14
    • 77956451327 scopus 로고    scopus 로고
    • For example, by choosing the appropriate porphyrins it has been possible to design and obtain species showing energy-transfer processes (see ref. [3c])
    • For example, by choosing the appropriate porphyrins it has been possible to design and obtain species showing energy-transfer processes (see ref. [3c]).
  • 16
    • 77956448619 scopus 로고    scopus 로고
    • note
    • From our current data, we cannot entirely rule out the possibility of a statistical rather than a stepwise formation of (n+1)/4 assemblies (in which n is the number of porphyrin units present). However, the presence of well-defined break-points and different slopes after each addition step (average 20% shift) suggests that we are dealing with one predominant species per step. More complex equilibria would likely manifest as a straight line from the 1:4 to the 5:4 ratio (i.e., an absence of break-points) because the porphyrin molecules would experience an averaged environment as a result of the simultaneous presence in solution of several assemblies with different stoichiometries.
  • 20
    • 77956432147 scopus 로고    scopus 로고
    • The form factor obtained by static light scattering confirms the presence of the large assemblies revealed by the dynamic light-scattering method
    • The form factor obtained by static light scattering confirms the presence of the large assemblies revealed by the dynamic light-scattering method.
  • 21
    • 77956451007 scopus 로고    scopus 로고
    • On increasing the concentration of porphyrins, the scattering of the aggregates becomes much more intense and covers the signals of the smaller species, preventing determination of their size
    • On increasing the concentration of porphyrins, the scattering of the aggregates becomes much more intense and covers the signals of the smaller species, preventing determination of their size.
  • 22
    • 77956433703 scopus 로고    scopus 로고
    • 4 have indeed evidenced quenching of the emission of the Zn derivative
    • 4 have indeed evidenced quenching of the emission of the Zn derivative.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.