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박혜정,성남경,김수한,안소현,윤웅찬,조대원,Patrick S. Mariano 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.12
This study explored a direct SET-photochemical strategy to construct a new family of thioene conjugatednaphthalamide fluorophore based lariat-crown ethers which show strong binding properties towards heavy metal ions. Irradiations of designed nitrogen branched (trimethylsilyl)methylthio-terminated polyethylenoxytethered naphthalimides in acidic methanol solutions have led to highly efficient photocyclization reactions to generate naphthalamide based lariat type thiadiazacrown ethers directly in chemo- and regio-selective manners which undergo very facile secondary dehydration reactions during separation processes to produce their corresponding amidoenethio ether cyclic products tethered with electron donating diethyleneoxy- and diethyenethio-side arm chains. Fluorescence and metal cation binding properties of the lariat type enamidothio products were examined. The photocyclized amidoenethio products, thioene conjugated naphthalamide fluorophore containing lariat-thiadiazacrowns exhibited strong fluorescence emissions in region of 330-450 nm along with intramolecular exciplex emissions in region of 450-560 nm with their maxima at 508 nm. Divalent cation Hg2+ and Pb2+ showed strong binding to sulfur atom(s) in side arm chain and atoms in enethiadiazacrown ether rings which led to significant enhancement of fluorescence from its chromophore singlet excited state and concomitant quenching of exciplex emission. The dual fluorescence emission responses towards divalent cations might provide a new guide for design and development of fluorescence sensors for detecting those metals.
휘발성 유기화합물(VOCs) 취급에 따른 화재 위험성에 관한 연구
조용선,박지훈,최재성,성남경,김용운,이광민,이기훈,박성권 한국화재감식학회 2016 한국화재감식학회 학회지 Vol.7 No.3
The expectancy about the personal safety is rising as mush as our society is developing. Nevertheless the explosion fire because of the oil vapor diffusion, that is one among the careless fire, is happening constantly. We are trying to calculate the arrival time of the fire risk because of the oil vapor diffusion on the workplace using the VOCs and thinner. For this, we measured the first ignition time through the explosion test and we compared with the theoretical time of lower explosion limit. Through the result, we expect to provide the standard in which the worker using the VOCs can recognize a danger by oneself.