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The Synthesis and Visible Absorption Properties of Squaryliums
박수열,오세화,( J. Griffiths ) 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.-
The near-infrared, i.e. beyond about 700 nm, have been a increase in interest in recent years. In past time they are understandable, since light absorption beyond 750 nm is undetectable by the eye and makes no contribution to the observed colour. However now such dyes find use in high technology application, i.e. lasers, laser addressed liquid crystal display, optical data storage, optical filters and many other electro-optical application. Particularly, the squarylium compounds based on donor-acceptor chromophores were investigated and the visible absorption spectroscopic properties of the various squaryliums were examined for the near-infrared region. Also, our results show that squaryliums colud be possible to be producing near-infrared absorbing materials with a view to investigate colour and their constitution relationships which show narrower, more intense bands than other materials, especially, methine dyes such as azo and azamethine typed compounds in visible absorption regions.
Syntheses of Symmetric Hetero typed Squarylium Dyes
박수열,오세화,박희문,( J. Griffiths ) 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.-
The many squaryliums of organic class have received a great deal of attention in recent years due to the potential applications of these materials in many fields such as electrophotographic processes, photovoltaic cells and in diode-laser optical storage recording system. Therefore, by suitable choice of terminal amino residues in the 1,3-squaryliums it is possible to displace the absorption band into the near-infrared regions. In this section, the visible absorption properties of the heterocyclic squaryliums were studied and their colour change phenomena were considered. As a these results it was designed that heterocyclic squarylium dyes could be probably suitable indicators for both titrimetric and colourimetric purposes. Interestingly, Some squarylium dyes are used for semi-permanent hair dyes due to low molecule weight, soluble in water and high affinity on hair with polar structure.
Colour Change Redox Behaviour of the 1,3-Squaraine Dyes
박수열,오세화 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0
The 1,3-bis(4-aminoaryl)squaraines showed colour change behaviour, they were found to undergo reduction with sodium borohydride in solution to give colourless leuco compounds, which oxidised readily in air back to the coloured squaraine dye.We have investigated this possibility, and have found that reduction can, in most cases, be achieved readily in organic solvents with sodium borohydride, and moreover, the resultant colourless reduced species (leuco dyes) are generally chemically stable and can be oxidised back to the coloured dye with air or common inorganic oxidants. This meant that the 1,3-squaraines could be used as redox indicators, with possible functional applications in enzyme assays, oxygen detection, or reprographic systems, and thus the chemistry of the leuco-1,3-squaraines was investigated in detail in order to determines their potential value in such areas.
선박용 연료유에 유용한 식별제 소재 선별 및 물성평가연구
박수열,이병민,송유림,강은경 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
전 세계적으로 유가가 급증하면서, 고급 유류제품에 열악한 저급 유류제품을 희석하여 판매하거나, 저급의 유사 유류제품을 판매하는 등의 불법행위가 성행되고 있다. 이에 유류 식별제로서 요구되는 사항을 모두 만족하며, 특히 용해성이 매우 좋고 저장성이 우수하고, 미량으로도 유류 식별이 가능한 유류 식별제 제품 개발이 요구된다. 본 연구는 선박 연료유용 식별제 및 이들의 조성물을 선별하고, 이들의 광학성능을 평가하여, 유류 식별제의 적합성을 확보하는데 있다.