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오세화,박수열,Griffiths, J. 한국공업화학회 2001 응용화학 Vol.5 No.2
The majority of dyes belong to the chromophoric class known as donor-acceptor systems, the essential structural feature of such systems being the presence of one or more electron donating groups conjugated to one or more electron withdrawing groups via an unsaturated bridge. Visible light absorption is then associated with the migration of electron density from the donor region of the molecule to the acceptor region. H-Chromophores is a special type of donor-acceptor system, and can be regarded as made up of two cross-conjugated donor-acceptor systems sharing a common conjugating bridge. Several new H-chromophore systems were synthesised with a view to examining there colour properties, pH sensitivity and redox behaviour. This could be reversed by air-oxidised, suggesting that these chromophores could be useful as colour formers.
Isatin α - chloride 를 이용한 지시약용 염료
오세화,전근,박수열,박희문,박명순 한국공업화학회 2000 응용화학 Vol.4 No.2
The indigoid-type dyes based on isatin α-chloride were synthesized and the dyes were discussed with relevance to the "H-chromophore" or "cross-conjugated chromophore." The colour-changed properties of the dyes were also investigated by means of visible absorption spectroscope. The novel dyes from isatin α-chloride are of theoretical interest and such dyes can be used as continuous pH indicators in acid/base titrimetric analyses or redox indicator in their specific behaviour.
오세화,전근,박수열,박희문 한국공업화학회 2000 응용화학 Vol.4 No.2
When adsorption organic molecules within microporous channels it is crucial to ensure that the adsorptive conditions do not extirpate the microporous structure. For this presentation, we will show the procedure about formation of the colorant-pore networks that monitored by visual inspection and chromatographic method to determine the grade of the color saturation. Conclusively, micropores have a selective adsorptive properties for specific organic colorants.