Paper Title:
The Polar Sulfonic Groups Influence on Structure of Self-Assembled Tetrapyrrolic Molecules
  Abstract

An understanding of both the interactions between the adsorbate molecules and the interactions between adsorbates and the surface is a prerequisite to eventually controlling the selfassembly process in supramolecular aggregation. Here we report the formation of supramolecular structures (J-aggregates) whose size and aggregation pattern are controlled by changing the number of polar sulfonic groups of meso-tetra (4-sulfonatophenyl) porphine. Using atomic force microscopy we show that substituted porphyrin molecules (5,10,15,20-tetrakis(4-sulfonatophenyl) porphine (TPPS4), 5,10,15-tris(4-sulfonatophenyl)-20-phenyl porphine (TPPS3), 5,15-bis(4-sulfonatophenyl)- 10,20-diphenyl porphyne (TPPS2op) - SO3 groups are opposite each other, and 5,20-bis(4- sulfonatophenyl)-10,15-diphenyl porphyne (TPPS2a) . SO3 groups are adjacent each other) form different spatial structures. Our findings suggest that placement of functional groups that are participating in direct noncovalent interactions will allow design and construction of different supramolecular structures adsorbed to surfaces.

  Info
Periodical
Solid State Phenomena (Volumes 97-98)
Edited by
Stepas Janušonis
Pages
221-224
DOI
10.4028/www.scientific.net/SSP.97-98.221
Citation
V. Poderys, A. Selskis, R. Rotomskis, "The Polar Sulfonic Groups Influence on Structure of Self-Assembled Tetrapyrrolic Molecules ", Solid State Phenomena, Vols. 97-98, pp. 221-224, 2004
Online since
April 2004
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$32.00
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