• Bulletin of the Korean Chemical Society
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• v.7 no.4
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• pp.304-308
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• 1986

When the two conjugated poly-ynes, 1-phenyl-6-methyl- and 1,6-diphenyl-1,3,5-hexatriynes, were irradiated with UVA in deaerated 2,3-dimethyl-2-butene solution, 1:2 photoadducts, 1-(1'-phenylethynyl-2',2',3',3'-tetramethylcyclopr opyl)-2-(l",2",2",3",3"-pentamethylcyclopropyl) acetylene and 1-(1'-phenylethynyl-2',2',3',3'-tetramethylcyclopr opyl)-2-(1"-phenyl-2",2",3",3"-tetramethylcyclopropyl) acetylene, were obtained, respectively. No photoadduct was formed with aerated 2,3-dimethyl-2-butene, or deaerated solutions of dimethyl fumarate, methyl crotonate, dimethyl maleate, and trans-1,2-dichloroethylene. The results suggest that the reactions proceed from the triplet state only with electron rich olefins such as 2,3-dimethyl-2-butene.

• Bulletin of the Korean Chemical Society
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• v.6 no.3
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• pp.153-157
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• 1985

A diacetylene compound, 1,4-diphenyl-1,3-butadiyne, was photolyzed with 2,3-dimethyl-2-butene, 1,4-cyclohexadiene, dimethyl fumarate, and methyl crotonate, as a model reaction of the phototoxic conjugated polyynes with DNA or RNA and [2 + 2] photocycloadducts were obtained except for 1,4-cyclohexadiene. In the photoreaction of 1,4-diphenyl-1,3-butadiyne with 2,3-dimethyl-2-butene, a [2 + 2 + 2] photoadduct was additionally obtained. The photolysis of 1,4-di-t-buyl-1,3-butadiyne with 2,3-dimethyl-2-butene also yielded a [2 + 2] photoadduct. Fluorescence was observed from all the photoadducts while the reactants did not show any fluorescence.

• Journal of the Korean Society of Food Science and Nutrition
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• v.24 no.1
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• pp.54-59
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• 1995

Compositional changes in pungent components of Dolsan Leaf Kimchi during fermentation were investigated. Major volatile compounds identified in the kimchi were 3-isothiocyanate-1-propene(allyl isothiocyanate, AITC) di-2-propenyl disulfide, 1-methoxy-2-butanol, 4-isothiocyanate-1-butene and dimethyl trisulfide. The contents of allyl isothiocyanate and 4-isothiocyanate-1-butene decreased, while dimethyl trisulfide increased during fermentation and storage. 1-methoxy 2-butanol increased at the initial stage of fermentation, showing highest at 2~3 days, and decreased thereafter. Di-2-propenyl disulfide decreased after 5 days and increased after 10days of storage. Total glucosinolate content increased by 3days and decreased from 4days of storage.

• Korean Journal of Materials Research
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• v.9 no.11
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• pp.1148-1152
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• 1999

An organometallic precursor, hfac(hexafluoroacetylacetonate) Cu(I) DMB (3,3-dimethyl- 1-butene) was synthesized, evaluated and compared with other precursors for metal organic chemical vapor deposition of copper thin films. It was found that at $40^{\circ}C$, the vapor pressure was an order of magnitude higher (about 3 torr) than (hfac) Cu vinyltrimethylsilane (VTMS) and films could be deposited at the substrate temperature of 100-$280^{\circ}C$ with deposition rate substantially higher. The copper films contained no detectable impurities as measured by Auger electron spectroscopy and had a resistivity of about 2.0$\mu\Omega$-cm in the deposition temperature range of 150 to $250^{\circ}C$. From the thermal analysis, (hfac)Cu(I)(DMB) is believed to be quite stable and no appreciable amount of precipitation was observed at $65^{\circ}C$ heating for more than a month.

• Applied Chemistry for Engineering
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• v.19 no.3
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• pp.322-325
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• 2008

3,3-Dimethyl-1-butene ($C_6H_{12}$) monomer was deposited using a plasma-enhanced chemical vapor deposition (PECVD) instrument. The more the R.F. power/pressure ratio in FT-IR spectrum, the less the hydrogen quantity and the dangling bond in amorphous carbon films observed so that the mechanical property of the films are improved related to the density. Also, with the increase D peak in Raman spectrum is increased and the ring structure's films are produced. According to these results, hardness and modulus are 12 GPa and 85 GPa, respectively. The refractive index (n) and extinction coefficients (k) of the deposited films are increased with the increase in a power/pressure ratio.

• Bulletin of the Korean Chemical Society
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• v.8 no.5
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• pp.376-380
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• 1987

The cyclobutane forming photocycloaddition reaction of 5(E)-styryl-1,3-dimethyluracil with some olefins occurs on the 5,6-double bond of uracil ring rather than the expected central double bond via an intermediate, probably the photochemical Diels-Alder type adduct. This intermediate formed on short term irradiation of 5(E)-styryl-1,3-dimethyluracil and 2,3-dimethyl-2-butene solution is converted into the $C_4$-cycloadduct on the prolonged irradiation. Quantum yield of the intermediate formation is not linear with the concentration of 2,3-dimethyl-2-butene probably due to the secondary reaction accompanied with the complex reaction kinetics. The intermediate is formed from the lowest excited singlet state.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.129-130
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• 2007

3,3-Dimethyl-1-butene ($C_6H_{12}$) monomer를 이용하여 RF power와 압력에 따라 막을 증착하였다. Power/pressure (W/Torr)가 증가할수록 증착된 비정질 탄소막은 FT-IR 스펙트럼에서 $CH_x$ (at around $2900cm^{-1}$)는 감소하였지 만 elastic modulus는 증가하는 것으로 나타났다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.185-186
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• 2007

3,3-Dimethyl-1-butene ($C_6H_{12}$) monomer를 이용하여 RF power와 압력에 따라 막을 증착하였다. 증착된 막은 power/pressure (W/Torr)가 증가할수록 비정질 탄소막은 FT-IR 스펙트럼에서 $CH_x$ (at around $2900cm^{-1}$)는 감소하였고, n과 k값은 증가하는 것으로 나타났다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.104-105
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• 2007

3,3-Dimethyl-1-butene($C_6H_{12}$) monomer를 이용하여 RF power와 압력에 따라 증착된 막의 refractive index와 extinction coefficient를 알아보았다. 증착된 막의 n & k는 power/pressure가 증가할수록 증가하였으며, Ar으로 증착된 막이 더 낮은 값을 갖는 것으로 나타났다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.160-161
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• 2007

3,3-Dimethyl-1-butene ($C_6H_{12}$) monomer를 이용하여 RF power와 압력에 따라 막을 증착하였다. 증착된 막은 power/pressure (W/Torr)가 증가할수록 비정질 탄소막은 Raman 스펙트럼에서 D peak가 증가하였고, ring 구조의 막을 형성하였다. 또한 ring 구조의 막이 형성됨으로써 hardness와 modulus는 각각 12 GPa과 85 GPa로 선형적으로 증가하는 것으로 나타났다.