Journal
DYES AND PIGMENTS
Volume 83, Issue 3, Pages 334-338Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2009.05.012
Keywords
Dipicolinic acid; pH sensor; Spectroscopic properties; Two-photon absorption; Fluorescence imaging; Water-soluble
Funding
- Innovation Program of Shanghai Municipal Education Commission [09YZ160]
- Shanghai Normal University [SK200839]
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The presence of two carboxylic acid groups and two hydroxyl groups within the novel dye, (E)-4-(4-bis(2-hydroxyethyl)amino)styryl)pyridine-2,6-dicarboxylic acid, resulted in good water solubility. The compound's UV absorption and photoluminescence spectra were each highly pH sensitive in acidic solutions and two isobestic points were observed. The TPA cross-section coefficient and two-photon fluorescence cell imaging of the dye were investigated. (C) 2009 Elsevier Ltd. All rights reserved.
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