Photochromic polymer composites for two-photon 3D optical data storage

Claudia C. Corredor, Zhen Li Huang, Kevin D. Belfield, Alma R. Morales, Mykhailo V. Bondar

Research output: Contribution to journalArticlepeer-review

179 Scopus citations


In this paper we demonstrate 3D two-photon recording and two-photon readout in photochromic polymer composites containing a mixture of 1,2-bis(2- methylbenzo[b]thiophen-3-yl)hexafluorocyclopentene (diarylethene 1) and fluorene derivatives 2,2′-(9,9-didecyl-9H-fluorene-2,7-diyl)bis(ethene-2,1-diyl) bis(4,1-phenylene)) dibenzo[d]thiazole (2) or poly(9,9-didecy1-2,7- dipheylaminofluorene) (3). The recording mechanism in this system is based on two-photon excitation of the closed form of diarylethene 1 at 800 nm. The readout mechanism is based on the modulation of the emission intensity of fluorene derivatives 2 or 3 by the closed form of diarylethene 1 through Resonance Energy Transfer (RET). Foster distances (R 0) and critical concentrations (A 0) were calculated from the spectral overlap of the donor's emission (fluorene derivatives) and the acceptor's absorption (closed form of diarylethene 1) in solution and in polymer films of PMMA-co-VBP. This system was demonstrated to be suitable for recording data by two-photon excitation in thick storage media. The RET-based readout method proved to be essentially nondestructive (exhibiting a loss of the initial fluorescence emission less than 20% of the initial emission after 10 000 readout cycles), providing a solution to a long-standing challenge in photochromic optical data storage.

Original languageEnglish (US)
Pages (from-to)5165-5173
Number of pages9
JournalChemistry of Materials
Issue number21
StatePublished - Oct 16 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry


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