Synthesis and characterization of an efficient solution-processable green Ir(III) complex with a solubilizing group using a tandem reaction

박호열,Maheshwaran Athithan,진성호 한국정보디스플레이학회 2020 Journal of information display Vol.21 No.4

The new efficient green heteroleptic phosphorescent Ir(III) complex [5-methyl-8-trifluoromethyl- 5H-benzo(c)(1,5)naphthyridin-6-one](3-(2-ethoxyethoxypyraznate))iridium(III) (Ir-prz) was designed and synthesized with a high photoluminescence quantum yield (PLQY). In addition, the solubilizing group 2-ethoxyethanol (EO2-) was attached to the ancillary ligand via a tandem reaction. Their thermal, photophysical, electrochemical, and electroluminescent (EL) properties were fully investigated. The solution-processed green PHOLED using Ir-prz as dopant and 4,4'-bis(N-carbazolyl)-1,1'- biphenyl as host achieved a maximum external quantum efficiency of 8.94% and a maximum current efficiency of 16.50 cd A−1, with a maximum luminescence of 18,638 cd m−2.

펜싱 팡트동작의 하지관절모멘트 분석

박호열,주명덕 한국교원대학교 교육연구원 2017 敎員敎育 Vol.33 No.2

In this study, joint moment of lower limb in fente motion that is attack technique of fencing was analyzed by using 3D image and force platform by targeting middle school male fencing athletes in order to present scientific and objective ground data not only in fencing but also in motion similar to fente motion. First, at the time of performing fente motion, plantar flexion moment was represented in both ankle joint. At an early stage of performing motion, flexion moment was significantly increased in left knee but from the time of touching ground by right foot, it was rapidly decreased and slight extensor moment was represented. In right knee, after flexion moment was progressed, it was represented to be decreased in order to minimize frontal knee angle. Second, adduction moment was represented in left knee joint at preparation stage. However, as body was moved forward, it was rapidly changed to abduction moment. In left knee joint, abduction moment was gradually increased and in right knee joint, abduction moment was represented to be increased. Third, Medial torque moment was represented in early motion of left knee joint but later, medial torque moment and exterior torque moment were balanced. In left, right hip joint as well as in right ankle joint, balance was maintained at the time when medial torque moment and exterior torque moment touched the ground. Fente motion of fencing was represented to minimize left, right movement of body in order to quickly pierce target. In a process of moving body, left foot showed plantar flexion moment in order to gain momentum of fente motion. Meanwhile, in both feet, medial torque moment and exterior torque moment were represented to be balanced. This motion is considered to control joint torque as motion is rapidly performed forward. 본 연구는 펜싱의 팡트동작 시 발생되는 하지관절모멘트에 관한 연구로 3차원 영상 및 지면반력 데이터를 이용하여 운동동작을 분석함으로써 안정적이고 효율적인 동작에 대한 과학적이며, 객관적인 근거자료를 마련하는데 목적이 있다. 이 연구는 중학교 3학년 남자 펜싱선수들을 대상으로 팡트동작 시 하지 분절에 대한 모멘트를 분석하였다. 팡트동작은 상대방을 최대한 빠르고 정확하게 찌르기 위한 동작이다. 동작 수행 시 지면을 밀어내면서 지탱하는 왼쪽 다리의 발목에서는 저측굴곡 모멘트가 나타났다. 이는 초기 동작 수행 시 지면을 밀어내는 역할을 수행한 것으로 생각된다. 또한 내전 모멘트에서 외전 모멘트로 전환되는 과정에서 발생한 힘으로 추진력을 뒷받침한 것으로 판단된다. 왼쪽 무릎관절에서는 신전 모멘트가 크게 나타난 것으로 보아 무릎이 신전되는 과정에서 전방으로 신체를 이동시키기 위한 힘의 발현을 수행한 것으로 나타났다. 이 힘은 발목에서 전달하는 힘의 역할 보다 크게 나타났다. 한편, 전방으로 내딛는 오른쪽 다리의 고관절은 신전 모멘트가 발생하였다. 또한 양쪽 다리에서는 내측회전 모멘트와 외측회전 모멘트가 한쪽 방향으로 편향되게 나타나지 않게 나타났다. 이는 빠르고 정확하게 전방으로 팡트동작을 수행하기 위해 관절의 회전력을 통제한 것으로 판단된다.

펜싱 플레쉬 동작의 하지 관절모멘트 분석

박호열,주명덕 한국교원대학교 교육연구원 2019 敎員敎育 Vol.35 No.3

This study examined the fléche behavior of fencing. Participants were middle school and high school fencing athletes, and. 3D imagery and ground reaction force were used to study the knee joint moments. First, the participants leapt forward with their back legs. The forces generated in the ankle joints of the back legs were the internal adduction, the moments of the plantar flexion and the valgus moments. At the ankle joints of the flash workout, middle school fencers showed higher measurements than high school fencers. In the ground reaction, high school students reached the ground in a short period of time. For high school fencers, the ground response was executed in a short time and the role of the ankle joints was relatively reduced. Second, abduction moment appeared in all participants΄ knees. This is because the foot is pulled from the marche and landed at 90°when it touchd the ground. All participants showed extension moments and showed the highest measured values in the knee. Moreover, the measured value of the high school students was larger than that of the middle school students. Consequently, the extension moment plays a very important role in making the body go forward. In the cross section, the external moment appeared with all the participants. However, there was no difference in the measured values. Third, in the hip joint, the participants showed abduction, extension, and medial rotation. The maximum value of abduction was similar. However, junior high students had more abduction moment. On the other hand, the measured value of the extension moment was higher in high school students. This is thought to be the role of the extension moment rather than abduction moment in order to exert a strong leverage in a short time. There was no difference in medial rotation. Fléche motion was compared between male middle school students and male high school students. High-school students had short operating times, and with middle school students the ankle joint played an important role. On the other hand, knee joints played an important role in high school students. Therefore, a highly-skilled person reached the ground in a short time. It is the hip joint that exerts the greatest power on the back of the experimenter's flash motion. The abduction moment of middle school students was large. High school students showed a large extension moment. Therefore, this study found that the role of the hip joint is important for performing fast movements. 본 연구는 펜싱의 플레쉬 동작 시 하지관절모멘트에서 발현되는 힘에 관한 연구로 3차원영상및 지면반력 데이터를 이용하여 동작을 분석하여 빠르고 정확하게 움직이는 효율적인 동작에 대한 과학적이고 객관적인 자료를 찾는데 목적이 있다. 이 연구는 남자 중학생과 고등학생 펜싱선수를 대상으로 플레쉬 동작 시 하지분절에 관한 모멘트를 분석하였다. 플레쉬 동작은 멀리 있는 상대방을 정확하게 찌르기 위한 동작이다. 발목관절에서 중학생이 저측굴곡, 내전, 외번이 크게 작용하였다. 이는 중학생이 고등학생보다 지면에 작용하는 시간이 길기 때문이다. 무릎관절에서는 고등학생이 내전모멘트가 크게 작용하였다. 무릎의 내전의 힘이 신체를 빠르게 이동시키는데 중요한 역할을 하였다. 고관절에서도 내전모멘트가 신체이동을 빠르게 이동시키는데 큰 역할을 수행하였으며, 특히, 고등학생은 큰 측정값을 보였다. 따라서 플레쉬 동작에서 고관절의 내전모멘트의 역할이 매우 중요한 역할을 하였다.

남자 중학생 숙련자와 비숙련자의 손짚고앞돌기 동작에 대한 운동역학적 비교 분석

박호열,주명덕 한국교원대학교 학교체육연구소 2012 학교체육연구소지 Vol.19 No.1

This study was to use the 3D visual device and surface reaction device for 6 male middle school gymnastics players and 6 plain students and analyze the factors to execute stable handspring and provide a guideline to teach male middle school students to ex

동결건조장치

박호열,Park, Ho-Yeol 한국설비기술협회 1990 설비 : 공조ㆍ냉동ㆍ위생 Vol.7 No.9

감성측정 EEG 설계를 위한 데이터부 소비전력 비교

박호열,박원엽,김정채,이지은,유선국 한국감성과학회 2011 추계학술대회 Vol.2012 No.-

High-efficiency Solution-processed Deep-blue PHOLEDs Using Carbenic Ir(III) Complexes

박호열,진성호,라자 쿠마레즌,제갈영순,티판 마니간단 한국고분자학회 2023 한국고분자학회 학술대회 연구논문 초록집 Vol.48 No.1

Improving the Performance of Blue-emissive Ir(III) Complexs for Solution-Processed Phosphorescent Organic Light-Emitting Diodes using New Bipolar Type Host

박호열,아티싼 마헤쉬와란,제갈영순,진성호 한국고분자학회 2018 한국고분자학회 학술대회 연구논문 초록집 Vol.43 No.2

Eco-friendly Solution-processed Green PHOLEDs Using a Ir(III) Complex and 2-Methylanisole

박호열,김혜린,지제성,진성호 한국고분자학회 2024 한국고분자학회 학술대회 연구논문 초록집 Vol.49 No.1

High Performance Green Emitting Ir(III) Complexes For Solution-Processed Phosphorescent Organic Light Emitting Didoes Applications

박호열,아티싼마헤쉬와란,진성호 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0

A new host and two new highly efficient green-emitting hetroleptic Ir(III) complexes based on amide bridged trifluromethyl substituted phenylpyridine skeleton as main ligand whereas a phosphine oxide containing symmetrical dipyridinylphosphinate and asymmetrical phenyl(pyridin-2-yl)phosphineate as ancillary ligands are designed and synthesized. Their thermal, photophysical, electrochemical and electroluminescent (EL) properties are fully investigated. The optimized devices show excellent EL performances with maximum current efficiency (CEmax) of 68.72 cd/A and maximum external quantum efficiency of 20.82% without compromising the CIE (x, y) color purity.