Investigation and Control of Single Molecular Structures of Meso- Meso Linked Long Porphyrin Arrays

Sang Hyeon Lee, Sujin Ham, Seungsoo Nam, Naoki Aratani, Atsuhiro Osuka, Eunji Sim, Dongho Kim

Research output: Contribution to journalArticle

Abstract

We have investigated conformational structures of meso-meso linked porphyrin arrays (Zn) by single molecule fluorescence spectroscopy. Modulation depths (M values) were measured by excitation polarization fluorescence spectroscopy. The M value decreases from 0.85 to 0.46 as the number of porphyrin units increases from 3 to 128, indicating that longer arrays exhibit coiled structures. Such conformational changes depending on the length have been confirmed by coarse-grained simulation. The histograms of M values and traces of centroid position of emitting sites by localization microscopy showed that the structures of longer arrays changed to more stretched after solvent vapor annealing with tetrahydrofuran.

Original languageEnglish
Pages (from-to)5121-5125
Number of pages5
JournalJournal of Physical Chemistry B
Volume122
Issue number19
DOIs
Publication statusPublished - 2018 May 17

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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