scispace - formally typeset
Search or ask a question
Author

Jinyoung Lee

Bio: Jinyoung Lee is an academic researcher from LG Chem. The author has contributed to research in topics: Copolymer & Carbene. The author has an hindex of 2, co-authored 2 publications receiving 45 citations.
Topics: Copolymer, Carbene, Pyridine, Palladium

Papers
More filters
Patent
12 Jun 2012
TL;DR: In this paper, the authors provided novel compounds and an organic electronic device using the same, which can perform the role of light-emitting materials such as hole injection, hole transport, electron injection and transport, and the like, in organic electronic devices, including organic light emitting devices, and showed excellent characteristics for efficiency, driving voltage and lifespan.
Abstract: The present invention provides novel compounds and an organic electronic device using the same. The compounds according to the present invention can perform the role of light-emitting materials such as hole injection, hole transport, electron injection and transport, and the like, in organic electronic devices, including organic light-emitting devices, and the organic electronic devices according to the present invention show excellent characteristics for efficiency, driving voltage and lifespan.

35 citations

Journal ArticleDOI
TL;DR: Palladium complexes bearing abnormal imidazo[1,5-a]pyridine (aImPy)-based N-heterocyclic carbene ligands were developed for the homopolymerization of olefins and the copolymerisation of OLEFins as discussed by the authors.
Abstract: Palladium complexes bearing abnormal imidazo[1,5-a]pyridine (aImPy)-based N-heterocyclic carbene ligands were developed for the homopolymerization of olefins and the copolymerization of olefins and...

19 citations


Cited by
More filters
Patent
13 Aug 2014
TL;DR: In this paper, the authors presented a heterocyclic compound and an organic light-emitting device including the HOC compound, which have high efficiency, low driving voltage, high luminance and long lifespan.
Abstract: The present invention provides a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltage, high luminance and long lifespan.

1,346 citations

Patent
25 Mar 2013
TL;DR: In this paper, an organic light-emitting element with an organic compound layer placed between the pair of electrodes, in which the organic compound includes an iridium complex having a benzo[f]isoquinoline as a ligand and a heterocycle-containing compound of a specific structure.
Abstract: Provided is an organic light-emitting element improved in luminous efficiency and lifetime. The organic light-emitting element includes a pair of electrodes and an organic compound layer placed between the pair of electrodes, in which the organic compound layer includes an iridium complex having a benzo[f]isoquinoline of a specific structure as a ligand and a heterocycle-containing compound of a specific structure.

72 citations

Patent
Kwang-Hyun Kim1, Kim Jongwoo1, Jeonga Oh1, Young-Kook Kim1, Seok-Hwan Hwang1 
04 Sep 2014
TL;DR: In this article, a condensed-cyclic compound represented by Formula 1, in which one selected from R 1 to R 8 is a monoamine represented as Formula 2: Formula 1 may act as a hole transport material having a suitable energy level and band gap.
Abstract: The present disclosure provides a condensed-cyclic compound represented by Formula 1, in which one selected from R 1 to R 8 is a monoamine represented by Formula 2: The condensed-cyclic compound represented by Formula 1 may act as a hole transport material having a suitable energy level and band-gap. Further, the condensed-cyclic compound represented by Formula 1 has a fused core, and accordingly may have a high glass transition temperature (Tg), high melting point, and improved resistance to high temperatures. Therefore an organic light-emitting device including the condensed-cyclic compound represented by Formula 1 may retain high durability during storing and/or driving.

64 citations

Journal ArticleDOI
TL;DR: This Account focuses on the copolymerization of propylene with polar comonomers, which remains underdeveloped as compared to the corresponding reaction using ethylene, and investigates a range of metal/ligand combinations.
Abstract: Polyolefins are produced in vast amounts and are found in so many consumer products that the two most commonly produced forms, polyethylene (PE) and polypropylene (PP), fall into the rather sparse category of molecules that are likely to be known by people worldwide, regardless of their occupation. Although widespread, the further upgrading of their properties (mechanical, physical, aesthetic, etc.) through the formation of composites with other materials, such as polar polymers, fibers, or talc, is of huge interest to manufacturers. To improve the affinity of polyolefins toward these materials, the inclusion of polar functionalities into the polymer chain is essential. The incorporation of a functional group to trigger controlled polymer degradation is also an emerging area of interest. Currently practiced methods for the incorporation of polar functionalities, such as post-polymerization functionalization, are limited by the number of compatible polar monomers: for example, grafting maleic anhydride is currently the sole method for practical functionalization of PP. In contrast, the incorporation of fundamental polar comonomers into PE and PP chains via coordination insertion polymerization offers good control, making it a highly sought-after process. Early transition metal catalysts (which are commonly used for the production of PE and PP) display poor tolerance toward the functional groups within polar comonomers, limiting their use to less-practical derivatives. As late transition metal catalysts are less-oxophilic and thus more tolerant to polar functionalities, they are ideal candidates for these reactions. This Account focuses on the copolymerization of propylene with polar comonomers, which remains underdeveloped as compared to the corresponding reaction using ethylene. We begin with the challenges associated with the regio- and stereoselective insertion of propylene, which is a particular problem for late transition metal systems because of their propensity to undergo chain walking processes. To overcome this issue, we have investigated a range of metal/ligand combinations. We first discuss attempts with group 4 and 8 metal catalysts and their limitations as background, and then focus on the copolymerization of propylene with methyl acrylate (MA) using Pd/imidazolidine-quinolinolate (IzQO) and Pd/phosphine-sulfonate (PS) precatalysts. Each generated regioregular polymer, but while the system featuring an IzQO ligand did not display any stereocontrol, that using the chiral PS ligand did. A further difference was found in the insertion mode of MA: the Pd/IzQO system inserted in a 1,2 fashion, while in the Pd/PS system a 2,1 insertion was observed. We then move onto recent results from our lab using Pd/PS and Pd/bisphosphine monoxide (BPMO) precatalysts for the copolymerization of propylene with allyl comonomers. These P-stereogeneic precatalysts generated the highest isotacticity values reported to date using late transition metal catalysts. This section closes with our work using Earth-abundant nickel catalysts for the reaction, which would be especially desired for industrial applications: a Ni/phosphine phenolate (PO) precatalyst yielded regioregular polypropylene with the incorporation of some allyl monomers into the main polymer chain. The installation of a chiral menthyl substituent on the phosphine allowed for moderate stereoselectivity to be achieved, though the applicable polar monomers currently remain limited. The Account concludes with a discussion of the factors that affect the insertion mode of propylene and polar comonomers in copolymerization reactions, beginning with our recent computational study, and finishing with work from ourselves and others covering both comonomer and precatalyst steric and electronic profiles with reference to the observed regioselectivity.

58 citations

Patent
Kim Jongwoo, Young-Kook Kim1, Jin-O Lim1, Seok-Hwan Hwang1, Hyoung-Kun Kim1 
13 Jun 2014
TL;DR: A compound, an organic light-emitting device, and a flat panel display device, the compound being represented by Formula 1, are shown in this article, where they are represented by two teams.
Abstract: A compound, an organic light-emitting device, and a flat panel display device, the compound being represented by Formula 1, below:

47 citations