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Issue 1, 2007
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Carbazole-based 1D and 2D hemicyanines: synthesis, two-photon absorption properties and application for two-photon photopolymerization 3D lithography

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Abstract

One and two dimensional (1D and 2D) carbazole based hemicyanines, where methyl pyridinium, methyl indolium and methyl benzothiazolium were used as acceptor group, were synthesized by Knoevenagel condensation. One-photon absorption, fluorescence and two-photon fluorescence spectra were investigated. The experimental results indicated that the different ionic acceptors affect their one-photon and two-photon properties. Among them, 2D methyl pyridinium carbazole derivatives exhibited low quantum yields and large two-photon absorption cross sections more than 1600 GM. The synthesized compounds were used as photoinitiator of two-photon photopolymerization (TPP), and three-dimensional (3D) microstructure was successfully fabricated by TPP 3D lithography. They could be utilized as effective two-photon polymerization photoinitiators.

Graphical abstract: Carbazole-based 1D and 2D hemicyanines: synthesis, two-photon absorption properties and application for two-photon photopolymerization 3D lithography

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Article information


Submitted
30 Jun 2006
Accepted
22 Sep 2006
First published
05 Oct 2006

New J. Chem., 2007,31, 63-68
Article type
Paper

Carbazole-based 1D and 2D hemicyanines: synthesis, two-photon absorption properties and application for two-photon photopolymerization 3D lithography

J. Gu, W. Yulan, W. Chen, X. Dong, X. Duan and S. Kawata, New J. Chem., 2007, 31, 63
DOI: 10.1039/B609309D

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