A new fluorescence probe for network formation with interesting nonlinear optical properties
✍ Scribed by Dr. Vera Bollaert; Prof. Frans C. De Schryver; Dr. Peter Tackx; Prof. André Persoons; Dr. Jan Jaap H. Nusselder; Prof. Jos Put
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 318 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0935-9648
No coin nor oath required. For personal study only.
✦ Synopsis
The polymerization of linear polyimides,['' polyurethanes ['] and polyamide~, [~] and the formation of epoxy networks[41 have been analyzed by means of labeling the polymer chain with a molecular sensor and studying changes in the photochemical and/or photophysical behavior of this reactive label. This technique offers the possibility of distinguishing several intermediate species where other spectroscopic techniques such as IR cannot. In this paper the synthesis, characterization, and properties of a trifunctional, highly symmetric probe, tris(p-isocyanatopheny1)amine (TI-PA), and of the I-butanol adduct, TU, are reported. The fluorescence intensity changes drastically upon urethane formation. This can be used to study the kinetics and mechanisms of network formation of TIPA-diols. TIPA acts both as a crosslinking site and as a chemical sensor. In addition, tris(p-isocyanatopheny1)amine and TU both show remark-(() VCH Verlugc,neseNr~hajt mbH W-69'40 Weinhelm, 1993