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From fractal to nanorod porphyrin J-aggregates. concentration-induced tuning of the aggregate size

Journal of Physical Chemistry B, ISSN: 1520-6106, Vol: 110, Issue: 16, Page: 8289-8295
2006
  • 117
    Citations
  • 0
    Usage
  • 50
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    117
    • Citation Indexes
      117
  • Captures
    50

Article Description

A structural change from fractal to nanorod J-aggregates of tetrakis(4-sulfonatophenyl)porphyrin has been obtained by acting on the intermolecular interaction potential. The size and shape of these self-assembled porphyrin clusters have been monitored under different experimental conditions, by means of polarized and depolarized dynamic light scattering and small and wide angle elastic light scattering. At sufficiently low porphyrin concentration and high ionic strength, the shielded repulsive potential seems to be responsible for the fractal structure of the aggregates. On the contrary, at low ionic strength (nonshielded potential) and high porphyrin concentration, these species self-assemble in a rodlike arrangement. The length of the so-formed rod-shaped aggregates decreases on increasing porphyrin concentration. Moreover, both fractals and rods display a structure-dependent optical activity induced by a chiral template. © 2006 American Chemical Society.

Bibliographic Details

Micali, Norberto; Villari, Valentina; Castriciano, Maria Angela; Romeo, Andrea; Monsù Scolaro, Luigi

American Chemical Society (ACS)

Chemistry; Materials Science

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