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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1999),
  • paper QThF5

Transient absorption studies of indium phthalocyanines

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Abstract

The phthalocyanines have numerous applications including as organic photoemitters, as photoconductors in laser printers and as a strong nonlinear absorber for optical limiters. In each of these applications, the photophysics is of critical importance. The photophysics of phthalocyanines is influenced by several structural properties1; 1) the identity of the central metal, 2) the number, position and identity of the peripheral substituents and 3) with some metals, the identity of the axial substituent. In this work the variation of the photophysics of substituted Indium Phthalocyanines (Pc) with axial substituent is examined. The two materials examined here, CIInPc((β-t-Bu)4 and IInPc((β-t-Bu)4, are known to have large nonlinear absorption coefficients arising from a strong triplet-triplet absorption in the lowest excited state. The object is to determine if the rate of formation of the triplet state, i.e. the intersystem crossing rate, can be enhanced by introducing iodine at the axial position.

© 1999 Optical Society of America

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