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

    Authors

    C. C. Corredor; Z. L. Huang; K. D. Belfield; A. R. Morales;M. V. Bondar

    Comments

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    Abbreviated Journal Title

    Chem. Mat.

    Keywords

    TETRAPHENYLPORPHYRIN-DOPED POLY(9, 9-DIOCTYLFLUORENE); RESONANCE; ENERGY-TRANSFER; NONDESTRUCTIVE READOUT; ONE-PHOTON; FLUORENE; DERIVATIVES; MOLECULAR MEMORY; DIARYLETHENE; ABSORPTION; LIGHT; SWITCHES; Chemistry, Physical; Materials Science, Multidisciplinary

    Abstract

    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-didecyl-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 I 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.

    Journal Title

    Chemistry of Materials

    Volume

    19

    Issue/Number

    21

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    5165

    Last Page

    5173

    WOS Identifier

    WOS:000250009800018

    ISSN

    0897-4756

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