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Synthesis of yellow synergist based on pigment yellow 74 for inkjet
김호겸,박종욱 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
New yellow synergist was synthesized for pigment dispersion in pigment ink. 1,4-Butanesultone was applied to Pigment Yellow74 (PY74) as a hydrophilic functional group in order to synthesize 4-[{2-[(2-Methoxy-4-nitro-phenyl)-(4-sulfo-butyl)-hydrazono]-1-meth ylene-3-oxo-butyl}-(2-methoxy-phenyl)-amino]-butane-1-sulfonic acid (PY74ASA-2). Whereas pigment showed extremely low solubility in water and organic solvents such as DMSO, DMF and methanol, the synergist was found to have higher solubility than pigment. This result can be interpreted as reduction of particle aggregation by increasing polarity. This synergist applied to pigment ink is expected to improve dispersion property and storage stability of ink.
Synthesis and lectroluminescence Property of diazocine derivatives
김호겸,박종욱 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Four new diazocine derivatives including anthracene moiety, 2,8-Bis-[3-(10-naphthalen-2-yl-anthracen-9-yl)-phenyl]-6H,12H-5,11-methanodi benzo[b,f][1,5]diazocine(AK14), 2,8-Bis-[2-(10-naphthalen-2-yl-anthra cen-9-yl)-phenyl]-6H,12H-5,11-methano-dibenzo[b,f][1,5]diazocine(A K15), 2,8-Bis-[4-(10-phenyl-anthracen-9-yl)-phenyl]-6H,12H-5,11-met hano-dibenzo[b,f][1,5]diazocine(AK20), 2,8-Bis-[2-(10-phenyl-anthrac en-9-yl)-phenyl]-6H,12H-5,11-methano-dibenzo[b,f][1,5]diazocine(AK 21) were synthesized. Those materials exhibited photoluminescence (PL) maximum value of about 411∼428 nm in solution state and 429∼483 nm in film state, respectively. Four compounds were used as EML in OL ED device: ITO / 2-TNATA (60 nm) /NPB (15 nm) / EML(35 nm) / Alq3 (20 nm) / LiF / Al. OLED devices, fabricated by AK14, AK20 and AK21, showed the current efficiency with 2.16cd/A, 0.28cd/A and 1.56cd/A. The OLED device, fabricated by AK15, showed the best performance with 2.83cd/A, 1.25lm/W and CIE(x,y) = (0.16, 0.23).
김호겸,박종욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
An ionic conjugated polymer with aromatic functional groups, poly {2-ethynyl-N-[4- (methylthio)benzylpyridinium bromide]}, was synthesized via the activated polymerization of 2-ethynylpyridine by using 4-(methylthio)benzyl bromide without any additional initiator or catalyst. The polymerization proceeded welㅣl in polar solvents such as DMF, DMSO, NMP and pyridine, and produced high yields. NMR, IR, and UV-vis spectroscopy confirmed a conjugated polymer backbone system containing N-(4-(methylthio)benzylpyridinium bromide as substituents. The photoluminescence maximum peak of the polymer was located at 508 nm, which corresponds to the photon energy level of 2.44 eV. The cyclovoltammograms of the polymer exhibited an electrochemically stable window in the 1.32 to 1.92 V region.
조리 관련 직업전문학교 학생들이 지각하는 교육서비스품질이 학습전이와 자발적 행동의도에 미치는 영향에 있어 전이 동기의 조절 효과에 관한 연구
김호겸,최우성 관광경영학회 2020 관광경영연구 Vol.96 No.-
In order to establish the educational services focused on consumers, it is necessary to perform the studies on the marketing-oriented core concepts such as education service quality, learning transfer, satisfaction in education and voluntary behavioral intention from the students’ perspectives. In this context, this study identified the effect of educational service quality perceived by the students, who had a class at vocational training institutes involved in cooking, on both learning transfer and voluntary behavioral intention. Furthermore, this study elucidated the regulating effect of motivation to transfer. The following results were derived. Firstly, the higher the education service quality was perceived, the higher the learning transfer appeared. Secondly, it appeared that the learning transfer becomes higher if the students perceive lecture program, educational circumstance and educational services among the education srvice quality as well as the motivation to transfer simultaneously. Thirdly, it was exhibited that participation intention, cooperation intention and royalty became higher as an increase of perception on learning transfer.
Synthesis and Electrooptical Properties of New Conjugated Bithiazole-Containing Polymers
김호겸,박종욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Three new bithiazole-based conjugated copolymers were synthesized and characterized. The EL device using PNBTV as the emitting layer showed red electroluminescence at 641 nm with a peak luminance of ca. 160 cd/m2 (0.008 cd/A). The red electroluminescence was attributed to the formation of excimers between the polymer chains. An EL device using PNBTV6as the emitting material, which had two n-hexyl groups introduced to the phenylene in the main chain of PNBTV, showed a reddish orange emission that was blue shifted by approximately 52 nm compared with that observed with PNBTV. This observation was attributed to the significant decrease in interactions between the chains of the polymers due to the two bulky n-hexyl groups. On the other hand, PNBTV6w as found to have superior hole transporting ability compared with its electron transporting ability.
Highly efficient emitters of ultra-deep-blue light using chrysene chromophores
김호겸,박종욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Chrysene was selected as an emission core to develop and study new materials. Six compounds introducing various side groups were designed and synthesized: 6,12-bis(30,50-diphenylphenyl)chrysene (TP-C-TP), 6-(30,50-diphenylphenyl)-12-(3,5-diphenylbiphenyl-400-yl)chrysene (TP-C-TPB) and 6,12-bis(300,500-diphenylbiphenyl- 40-yl)chrysene (TPB-C-TPB), which contained bulky aromatic side groups; and N,N, N0,N0-tetraphenyl-chrysene-6,12-diamine (DPA-C-DPA), [12-(4-diphenylamino-phenyl)-chrysen-6-yl]-diphenylamine(DPA-C-TPA) and 6,12-bis[4-(diphenylamino)phenyl]chrysene (TPA-C-TPA). The synthesized materials showed maximum absorption wavelengths at 342-402 nm in the film state and exhibited deep-blue photoluminescence (PL) emissions at 417-464 nm. The use of TP-C-TPB in a non-doped organic lightemitting diode (OLED) device resulted in ultra-deep-blue emission with an external quantum efficiency (EQE) of 4.02%.
승강기 갇힘 사고 시 색 온도에 의한 이용자의 심전도 변화
김호겸,김규범,조형석,안석현,민병찬 한국감성과학회 2020 감성과학 Vol.23 No.3
본 연구의 목적은 승강기 갇힘 사고 시 승객의 불안감을 해소할 수 있는 가장 안정적인 색 온도를 제안하는 것이다. 승강기 내부 조명의 색온도를 4단계(3000 K, 6000 K, 9000 K, 12000 K)로 조절하였다. 실험은 20대 성인 남성 20명을 대상으로 진행이 되었다. 각 상황별 이용자의 자율신경계 반응을 관찰하기 위해 심전도를 측정하여 분석하였다. 분석결 과, 12000 K와 비교 시 3000 K, 6000 K, 9000 K에서 교감신경계 활성도가 감소하였으며 통계적으로 유의한 차이가 인정되었다(p < 0.01). 그 중 3000 K의 조건에서 교감신경계 활성도가 가장 낮았다. 본 연구를 통해 승강기 갇힘 사고 시 3000 K의 색 온도가 승객으로부터 안정감을 유발하는 사실을 알 수 있었다. 본 연구결과를 활용한다면 승강기 갇힘 사고 시 승객의 안정성을 확보할 수 있을 것으로 보인다. This study aims to suggest the most stable color temperature that can relieve the anxiety of passengers in case of an elevator trapped accident. The experiment was conducted on 10 adult men in their 20s. The color temperature of the interior lighting of the elevator was adjusted to four stages (3,000 K; 6,000 K; 9,000 K; and 12,000 K). Electrocardiogram (ECG) was measured and analyzed to observe the reaction of the user’s autonomic nervous system decline in 3,000 K; 6,000 K; 9,000 K compared with 12,000 K, where a statistically significant difference was recognized (p < 0.01). Among them, the activity of the sympathetic nervous system was the lowest under the condition of 3,000 K. Through this study, it was found that the color temperature of 3,000 K induced a sense of stability among passengers in the event of an elevator jam. If the results of this study are used, it seems that the stability of passengers will be secured in the event of an elevator jam.