$NOTDH_2$ Schiff Base를 가진 전이금속(II) 착물의 합성과 구조분석

오정근,최용국,Oh, Jeong-Geun,Choi, Yong-Kook 한국분석과학회 1999 분석과학 Vol.12 No.6

2-hydroxy-1-naphthaldehyde와 aromatic amine으로부터 $N_2O_2$형의 네자리 schiff base 리간드인 Bis(2-hydroxy-1-naphtyllidine)-o-toluene-diimine;[$NOTDH_2$]를 합성하였다. 이 리간드와 cobalt(II), nickel(II) 및 copper(II) Acetate들과 반응시켜 schiff base 전이금속(II) 착물들을 합성하였으며 원소분석, IR, UV-vis, NMR 분광법 및 TGA로부터 착물들의 구조를 확인하였다. 중심 금속인 전이금속(II) 이온은 $N_2O_2$형의 주개원자를 갖는 네자리 리간드의 페놀에 있는 산소와는 이온결합을, aromatic amine의 질소와는 배위결합을 형성하여 비이온성의 착물을 형성하였다. $N_2O_2$형의 네자리 Schiff Base 전이금속(II) 착물에서 리간드와 금속이온들은 전이금속(II) 이온과 1:1로 결합하며 Cu(II)착물들은 4배위 구조임을 알았으며, Co(II) Ni(II)착물들은 2분자의 수화물이 배위된 6배위 착물 구조임을 알았다. Co(II), Ni(II), and Cu(II) complexes with tetradentate schiff base-$NOTDH_2$, were synthesized. The structures of these complexes were characterized by elemental analysis, IR, UV-visible, NMR spectra, and thermogravimetric analysis. The mole ratio of schiff base($NOTDH_2$) to the metal(II) at complexes was found to be 1:1. Cu(II) complexes were four-coordinated configuration, while Co(II) and Ni(II) complexes were hexacoordinated configuration containing two water molecules and all complexes were non-ionic compounds.

비수용매에서 Schiff Base를 가진 Cobalt(II) 착물들의 전기화학적 성질

오정근,최용국,Oh, Jeong-Geun,Choi, Yong-Kook 한국분석과학회 2002 분석과학 Vol.15 No.2

Co(II)착물들을 세자리 Schiff base-NOIPH, 네자리 Schiff base-$NOTDH_2$ 및 $TNBPH_4$ 로부터 합성하였으며, 이 착물들의 산화-환원 과정 mecanism을 지지 전해질로서 0.1 M TBAP를 포함한 DMF용액에서 작업전극으로 유리질 탄소전극을 사용하여 순환 전압-전류법과 펄스 차이 전압-전류법에 의해서 알아 보았다. [Co(II)$(NOIP)_2$]와 [Co(II)(NOTD)$(H_2O)_2$] 착물의 환원은 Co(III)/Co(II)의 반응이 비가역적으로 진행되고 Co(II)/Co(I)의 반응이 준가역적으로 진행되는 일전자의 2단계반응이 확산 지배적으로 일어났다. 반면에 [$Co(II)_2$(TNBP)] 착물의 환원반응은 $Co(II)_2$가 Co(II)/Co(I)로 진행되는 준가역적이며 일전자 일단계의 반응이 확산지배적으로 일어났다. Co(II) complexes with tridentate Schiff base-NOIPH and tetradentate Schiff base-$NOTDH_2$ and $TNBPH_4$ were synthesized. The redox process of the complexes in DMF solution containing 0.1M TBAP was investigated at glassy carbon electrode by cyclic voltammetry and differential pulse voltammetry techniques. Reduction step of [Co(II)$(NOIP)_2$] and [Co(II)$(H_2O)_2$] complexes were observed in two step as one electron process of irreversible or quasi-reversible and diffusion-controlled reaction. [$Co(II)_2$(TNBP)] complex was observed in one step as one electron process of quasi-reversible and diffusion-controlled reaction.

N₂O₂형 리간드를 가진 이핵성 Ni(II)과 Cu(II) 착물의 합성과 특성

오정근,Oh, Jeong-Geun 대한화학회 2004 대한화학회지 Vol.48 No.2

Synthesis and Characterization of Transition Metal(Ⅱ) Complexes with Tridentate Schiff Base in DMF Solution

오정근,최용국,Oh, Jeong Geun,Choi, Yong Kook Korean Chemical Society 1999 대한화학회지 Vol.43 No.5

2-hydroxy-1-naphthaldehyde와 2-aminopyridine으로부터 $N_2O$형의 세자리 Schiff Base 리간드인 (2-hydroxy-1-naphthyllidine)-o-iminopyridine [NOIPH]리간드와 Cobalt(II), Nickel(II) 및 Copper(II) Acetate들과 반응시켜 Schiff Base 전이금속(II) 착물들을 합성하였다. 이 리간드와 전이금속(II)착물들의 구조를 원소분석, IR, UV-vis, NMR 분광법 및 TGA 방법으로 확인하였다. 중심 금속인 전이금속(II) 이온은 $N_2O$형의 주개원자를 갖는 세자리 리간드의 페놀기에 있는 산소와는 이온결합을, 아로매틱 아민의 질소와는 배위결합을 형성하여 비이온성의 착물을 형성하였다. 착물에서 리간드들은 전이금속(II) 이온과 2:I의 몰비로 결합하며 4배위 구조임을 알았다. Shiff Base ligand such as [NOIPH] have been synthesized from 2-hydroxy-1-naphthaldehyde and arometic amine. Co(II), Ni(II), and Cu(II) complexes from the reaction metal salts with Tridentate Schiff Base [NOIPH] were sythesized. The ligand and metal(II) complexes were characterized by the elementary analysis, IR, UV-Vis, NMR spectra, and thermogravimetric analysis. Metal(II) complexes in solid state have been shown that the mole raio of Schiff base [NOIPH] as $N_2O$ type to Metal(II) is 2:1 and the metal(II) complexes of $N_2O$ ligand type were four-coordinated configuration.

날개 끝 회전자를 이용한 양력강화기법에 관한 연구

오정근,노재규,Oh, Jung-Keun,Noh, Jackyou 해양환경안전학회 2015 해양환경안전학회지 Vol.21 No.2

2차원 수중날개의 뒷날에 회전자를 부착한 고양력 발생장치의 성능을 파악하고, 실용화가능성을 살펴보기 위하여 NACA0020형상을 이용하여 모형을 제작하였고 캐비테이션 터널에서 실험을 수행하였다. 양력, 항력, 모멘트의 세 방향의 힘을 계측할 수 있는 가는 막대 형상의 로드셀을 부착하여 유체력을 계측하였으며, 뒷날에 부착된 회전자는 터널 외부에 설치된 DC 서보모터로 회전속도를 제어하였다. 다양한 편향각 조건과 회전자의 회전속도에 따른 체계적인 실험을 통하여 회전자의 효과를 확인하였다. 회전자의 회전속도에 의해 순환제어가 수월하게 조절 가능하다는 점을 실험을 통하여 검증하였으며 회전자의 회전속도에 따라 2배 이상의 양력이 발생함을 확인하였다. 따라서 제안한 양력 장치는 양력조절이 가능한 고양력 발생장치로 충분히 활용할 수 있음을 확인하였다. In order to verify the lift enhancement of the 2D hydrofoil with trailing edge rotor and check the ability of its practical use, experimental studies were conducted in the caviation tunnel using the test model with NACA0020 section. The three-component forces acting on the model could be measured by exclusively designed sting type multi-component load cell. The trailing edge of the model has been replaced with rotor which could be controlled by DC servo motor installed at the exterior of the tunnel. A typical effect of the trailing edge rotor has been introduced among the systematic experiments on various angular deviation of the model and the rotational velocity of the trailing edge rotor. It is appeared that the circulation control effect could be easily adjusted by selecting the rotational velocity of the trailing edge rotor and the lift force was augmented more than two times. Thus the proposed lifting device could be utilized as a novel high lifting device which has adjustability of lift force.

가정에서 배출되는 재활용품의 겉보기비중 비교·분석

오정근 ( Jung-keun Oh ),박선오 ( Seon-oh Park ),김기헌 ( Ki-heon Kim ),이영기 ( Young-kee Lee ),오길종 ( Gil-jong Oh ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회지 Vol.36 No.2

The Ministry of the Environment Notification on the conversion of loading boxes for waste collection and transportation vehicles to a sealed form (MOE, Notice No. 2016-237). This has been enacted to keep boxes from being blown off by wind or from leaking, during the course of collection, transportation, or storage of waste. This Notification also includes specific gravity criteria by loading mode of waste collection and transportation vehicle with the function of dumping. The specific gravities of compressed and non-compressed mode vehicles are 0.300 and 0.200, respectively. However, the recycling business has a significant issue with regard to the collection or transportation of some recyclable material, e.g., plastic waste, which has small apparent specific gravity and uses a non-compressed mode vehicle, making it difficult to meet the criteria of the Notification. Therefore, it is important to establish a standard based on the actual measurement data by waste item. The aim of this study is to suggest practical specific gravity criteria for different loading modes in household waste collection and transportation vehicles by not only investigating the current situation of waste collection and transportation but also calculating the apparent specific gravity of recyclable materials when subjected to collection and transportation vehicles. In this study’s results, the apparent specific gravities of mixed recyclable materials within compressed and non-compressed mode vehicles are 0.230 and 0.082, respectively, indicating that the existing criteria in this Notification are set too high.

자켓식 계류시설 안전성 평가 기법 연구

오정근 ( Oh Jeong Keun ),전우용 ( Jun Woo Yong ),손정훈 ( Son Jeong Hoon ),김수종 ( Kim Su Jong ),최재곤 ( Choi Jae Goun ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2

Most of the domestic jetties of jacket structure were designed by SACS with design criteria based on “Design Standards for Harbour and Fishery Port”. In fact, companies of structural maintenance and Inspection fail to conduct proper safety assessment of jetties of jacket structure using SACS due to a manpower shortage. But instead, they are using MIDAS to conduct safety assessment of these jetties as an alternative to using SACS. The purpose of this study is to provide the rational way for MIDAS user to assess jetties of jacket structure using SACS.

전단 보강이 없는 강섬유보강 고강도 철근 콘크리트보의 전단 거동에 관한 연구

오정근(Oh, Jung Geun),이광수(Lee, Kwang Soo),신성우(Shin, Sung Woo) 한국콘크리트학회 1991 콘크리트학회논문집 Vol.3 No.3

테마파크 이벤트 이미지가 전체 이미지와 관광객 만족, 행동의도에 미치는 영향

오정근 ( Jeong Keun Oh ),김동준 ( Dong Joon Kim ) 대한관광경영학회 2015 觀光硏究 Vol.30 No.3

현대사회에서 여가욕구의 다양성과 여가행태의 다변화로 관광객과 지역주민에게 주요 관광자원으로 인식되고 있는 테마파크의 매력성은 점차 증대되고 있다. 특히, 테마파크 이벤트와 같은 문화컨텐츠는 방문객의 관광만족과 행동의도에 직·간접적인 영향을 미칠 것으로 예상된다. 이에 따라, 본 연구에서는 테마파크 이벤트 프로그램의 인지적·정서적 이미지와 전체 이미지, 관광객만족, 행동의도 간의 인과관계에 관해 조사하였다. 연구결과, 인지적·정서적 이미지와 전체 이미지, 전체 이미지와 관광객만족, 전체 이미지와 행동의도, 관광객 만족과 행동의도 간의 모든 인과관계가 규명되었다. 본 인과관계 증명으로 테마파크 이벤트프로그램은 테마파크 이미지형성과 관광객 만족 차원에서의 성장과 발전에 직접적인 영향을 미치는 인자이기 때문에 기업 이미지 형성과 마케팅 전략에 적극 활용하는 노력이 요청된다 할 수 있다. As a multiplicity of leisure``s desire and a diversification of leisure``s behavior in modern society, theme park``s attractiveness to tourists and local people is gradually increasing. Especially, both direct and indirect causal relationship among culture contents like theme park events and cognitive, affective and overall image, tourists`` satisfaction and behavioral intentions will be expected. Thus, this study analyzed a causal relationship among theme park events, overall image, tourists`` satisfaction, and behavioral intentions. As a result, causal relations among theme park events, overall image, tourists`` satisfaction, and behavioral intentions were examined. According to this close examination, theme park companies have to utilize theme park events programs by means of a direct key factor in order to build up their corporate images and marketing strategies by developing the formation of theme park``s image and improving visitor``s satisfaction.

신문기사의 Text를 활용한 게스트하우스에 관한 의미인식 분석

오정근(Oh, Jeong-Keun) 청운대학교 관광산업연구소 2015 관광산업연구 Vol.9 No.2

This study is to analyze meaning perceptions on guest house’s stakeholders including guest house managers, tourists, tourist businesses, local merchants, central government and local government. Meaning perceptions on guest house were analyzed by journal texts as a semiotic method by denotations, connotations and myth meanings step by step. In analysis, guest house managers perceived ultimate meanings as local economic change and cultural spatiality on guest house. Tourists comprehended ultimate meanings as cultural touristic information exchange facilities on guest house, tourist businesses grasped ultimate meaning as cultural business, and local merchants took ultimate meaning as space for cultural business. Lastly, central government and local government perceived ultimate meanings as facilities for local touristic economy and cultural experience. Finally, guest house’s stakeholders commonly perceived lodging facilities as economic activations and cultural exchanges.