Title

Three-Dimensional Two-Photon Imaging In Polymeric Materials

Keywords

Fluorophore; Photoacid generation; Two-photon fluorescence imaging

Abstract

We report image formation via single and two-photon photoinduced fluorescence changes in a polymeric medium with two-photon fluorescence readout of multiplayer structures. Photoinduced acid generation in the presence of a two-photon fluorescent dye possessing strongly basic functional groups (7-benzothiazolyl-9,9-didecyl-2,2-(N,N-diphenylamino)fluorene underwent protonation upon exposure with UV or near-IR (740 nm fs pulses). Solution studies demonstrate formation of monoprotonated and diprotonated species upon irradiation, each resulting in distinctly different absorption and fluorescence properties. The fluorescence of the original, neutral, fluorophore is quenched upon monoprotonation with a concomitant increase in fluorescence at longer wavelengths due to the monoprotonated form. Hence, two channel two-platon fluorescence imaging provides "positive" or "negative" image readout capability. Results of solution and solid polymer thin films experiments are presented.

Publication Date

12-1-2001

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

4459

Number of Pages

281-289

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.454033

Socpus ID

0035760808 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0035760808

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