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Trinh Tung, Ngo,Yu, Young-Jun,Kim, Kyungkon,Joo, Sung-Hoon,Park, Yongsup,Jin, Jung-Il Wiley Subscription Services, Inc., A Wiley Company 2005 Journal of polymer science Part A, Polymer chemist Vol.43 No.4
<P>It was demonstrated that a series of copolymers consisting of 1,4-phenylenevinylene (PV) and 1,4-phenylene-1,2-ethanediyl (PE) units could be prepared from a single monomer, p-(methoxymethyl)benzyl chloride, via the chemical vapor deposition polymerization (CVDP) method. The composition of the copolymers could be varied simply by altering the monomer activation temperature. The higher the temperature, the lower the content of the PV unit. The photo (PL)- and electroluminescence (EL) properties of the copolymers that revealed a blueshift when compared with PPV strongly depend on the amount of the PE units incorporated. The external quantum efficiencies of the electroluminescence devices having the configuration of ITO/PEDOT-PSS/copolymer/Al-Li were higher than that of PPV, which can be ascribed to the improved confinement of excitons. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 742–751, 2005</P> <B>Graphic Abstract</B> <P>It was demonstrated that a series of copolymers consisting of 1,4-phenylenevinylene (PV) and 1,4-phenylene-1,2-ethanediyl (PE) units could be prepared from a single monomer, p-(methoxymethyl)benzyl chloride via the chemical vapor deposition polymerization (CVDP) method. The compositions of the copolymers could be varied by simply altering the monomer activation temperature. The higher the temperature, the lower the content of the PV unit became. <img src='wiley_img/0887624X-2005-43-4-POLA20537-gra001.gif' alt='wiley_img/0887624X-2005-43-4-POLA20537-gra001'> </P>
Preparation and Characterization of Nanocomposite Based on Polyaniline and Graphene Nanosheets
Ngo Trinh Tung,Tran Van Khai,전민희,이여진,정회일,방정환,손대원 한국고분자학회 2011 Macromolecular Research Vol.19 No.2
Polymer nanocomposites based on polyaniline (PANi) and graphene nanosheets (GNS) modified with poly(sodium 4-styrensulfonate) (PSS-GNS) were prepared, and their structure and properties were investigated by atomic force microscopy (AFM), scanning electron microscopy (SEM), UV-vis spectroscopy, ATR-IR spectroscopy,X-ray diffraction, elemental analysis, thermogravimetric analysis (TGA) and electrical conductivity measurements. The results revealed that for the PANi/PSS-GNS nanocomposites, the disordered structure of PSS-GNS was fully destroyed and PSS-GNS exists in the form of a single GNS or stacked PSS-GNS elements in a PANi matrix. PSS-GNS was partly covered by PANi due to hydrogen bonding that occurs between the PSS-GNS and PANi. By incorporating PSS-GNS, the electrical conductivity of PANi increased linearly from 0.84 S/cm for neat PANi to 4.96S/cm for a PANi/PSS-GNS (5%) nanocomposite. The thermal stability of the PANi was also improved significantly to approximately 100 oC by the nanocomposite.
Mai Ha Hoang,박지은,Dinh Long Phan,Trinh Tung Ngo,Tuyen Van Nguyen,박창근,조민주,최동훈 한국고분자학회 2018 Macromolecular Research Vol.26 No.9
Two new wide-bandgap conjugated copolymers, T-3MT and 2T-3MT, containing methyl-3-thiophenecarboxylate (3MT) as a weak accepting unit and indacenodithiophene (IDT) or indacenodithienothiophene (IDTT) as ladder-type donating units, were synthesized through Stille coupling polymerization. The effects of the IDT and IDTT units on the physical, optical, and electrochemical properties of these copolymers were investigated. Polymer solar cells (PSCs) were constructed using these new copolymers and different acceptor molecules for inter-comparative analysis of their performance. The PSCs bearing the as-cast active layers with 2,2'-((2Z,2'Z)-((4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b'] dithiophene-2,7-diyl)bis(methanylylidene))bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (IM-IDT) displayed the highest PCEs of 3.78−3.96%, mainly owing to the predominant face-on orientation of blend #ilm, and the relatively high open circuit voltage exceeding 1.0 V.
New π-extended triphenylene-based organic semiconductors in field-effect transistors
Hoang, Mai Ha,Nguyen, Duc Nghia,Ngo, Trinh Tung,Cho, Min Ju,Lee, Suk Joong,Choi, Dong Hoon Elsevier 2015 Synthetic metals Vol.209 No.-
<P><B>Abstract</B></P> <P>We demonstrated the synthesis of two new solution-processed triphenylene-based semiconductors and characterized their physical, optical, and electrochemical properties. Both were intriguingly capable of producing smooth films and high-quality microcrystalline objects. The single-crystal-based field-effect transistors (FETs) using these semiconductors displayed a maximum carrier mobility of ∼0.03cm<SUP>2</SUP> V<SUP>−1</SUP> s<SUP>−1</SUP> and a high on/off current ratio of ∼10<SUP>3</SUP>. Notably, the mobilities of the single-crystal-based FETs were measured to be two orders of magnitude greater than those of the thin-film transistors. To our knowledge, the carrier mobility obtained in this work is the highest ever reported for single-crystal FETs made of triphenylene analogues.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Two new disk-shaped semiconducting triphenylenes were synthesized. </LI> <LI> These molecules showed relatively low bandgap energies of ∼2.5eV. </LI> <LI> Their single-crystal-based field-effect transistors displayed a maximum carrier mobility of ∼0.03cm<SUP>2</SUP> V<SUP>−1</SUP> s<SUP>−1</SUP>. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Triterpenoids from aerial parts of Glochidion eriocarpum.
Thu, Vu Kim,Kiem, Phan Van,Yen, Pham Hai,Nhiem, Nguyen Xuan,Tung, Nguyen Huu,Cuong, Nguyen Xuan,Minh, Chau Van,Huong, Hoang Thanh,Lau, Trinh Van,Thuan, Ngo Thi,Kim, Young Ho Natural Product Communications 2010 Natural product communications Vol.5 No.3
<P>From the aerial parts of Glochidion eriocarpum, a new triterpene, glochieriol (1), three new triterpenoid saponins, glochieriosides C - E (2 - 4), together with four known triterpenes (glochidonol, glochidiol, lupeol, and 3-epi-lupeol) were isolated by using combined chromatographic separations. The structures of the new compounds were elucidated on the basis of spectroscopic data, including FTICR-MS, 1D and 2D NMR.</P>