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Xu Fei,Ming Wen Zhao,Yu Xiang Li 한국미생물학회 2006 The journal of microbiology Vol.44 No.5
A cDNA library of Ganoderma lucidum has been constructed using a Zap Express cloning vector. A glyceraldehyde-3-phosphate dehydrogenase gene (gpd) was isolated from this library by hybridization of the recombinant phage clones with a gpd-specific gene probe generated by PCR. By comparison of the cDNA and the genomic DNA sequences, it was found that the complete nucleotide sequence encodes a putative polypeptide chain of 338 amino acids interrupted by 6 introns. The predicted amino acid sequence of this gene shows a high degree of sequence similarity to the GPD proteins from yeast and filamentous fungi. The promoter region contains a CT-rich stretch, two CAAT boxes, and a consensus TATA box. The possibility of using the gpd promoter in the construction of new transformation vectors is discussed.
Xu, Fei,Mi, Dongbo,Bae, Hong Ryeol,Suh, Min Chul,Yoon, Ung Chan,Hwang, Do-Hoon Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.9
A series of fluorene-carbazole copolymers containing the pendant phosphor chromophore $Ir(absn)_2(acac)$ (absn: 2-(1-naphthyl)benzothiazole; acac: acetylacetone) were designed and synthesized via Yamamoto coupling. In the film state, these copolymers exhibited absorption and emission peaks at approximately 389 and 426 nm, respectively, which originated from the fluorene backbone. However, in electroluminescent (EL) devices, a significantly red-shifted emission at approximately 611 nm was observed, which was attributed to the pendant iridium(III) complex. Using these copolymers as a single emission layer, polymer light-emitting devices with ITO/PEDOT:PSS/polymer:DNTPD/TmPyPb/LiF/Al configurations exhibited a saturated red emission at 611 nm. The attached iridium(III) complex had a significant effect on the EL performance. A maximum luminous efficiency of 0.85 cd/A, maximum external quantum efficiency of 0.77, maximum power efficiency of 0.48 lm/W, and maximum luminance of 883 $cd/m^2$ were achieved from a device fabricated with the copolymer containing the iridium(III) complex in a 2% molar ratio.
Xu, Fei,Kim, Ji-Hoon,Kim, Hee Un,Jang, Jae-Ho,Yook, Kyoung Soo,Lee, Jun Yeob,Hwang, Do-Hoon American Chemical Society 2014 Macromolecules Vol.47 No.21
<P>A high-triplet-energy host polymer consisting of 9-(4-(bis(9-(2-ethylhexyl)-9<I>H</I>-carbazol-3-yl)methyl)phenyl)-9<I>H</I>-carbazole and tetraphenylsilane units was designed and synthesized. The triplet energy (2.67 eV) is one of the highest values reported for conjugated polymer hosts. Suitable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels of −5.61 and −2.24 eV, respectively, were also observed. Blue phosphorescent polymers were obtained by introducing bis[2-(4,6-difluorophenyl)pyridinato-<I>N</I>,<I>C</I><SUP>2</SUP>′]iridium(III) picolinate (FIrpic) into the host polymer while white phosphorescent polymers were synthesized by introducing red emissive bis[2-phenylquinoline-<I>N</I>,<I>C</I><SUP>2</SUP>′]iridium(III) picolinate ((Phq)<SUB>2</SUB>Irpic) into the blue phosphorescent one. Polymer light-emitting devices with the configuration ITO/PEDOT:PSS/PVK/EML/TSPO1/LiF/Al [ITO, indium tin oxide; PEDOT, poly(3,4-ethylenedioxythiophene); PSS, poly(styrenesulfonic acid); PVK, poly(<I>N</I>-vinylcarbazole); EML, the emitting layer was composed of polymer or polymer and 1,3-bis[5-(4-<I>tert</I>-butylphenyl)-1,3,4-oxadiazol-2-yl]benzene (OXD-7) in a doping ratio of 2:1); TSPO1, diphenylphosphine oxide-4-(triphenylsilyl)pheny] were subsequently fabricated. Efficient energy transfer from the host polymer to the blue and red iridium(III) complexes was observed owing to the high triplet energy of the host. One of the fabricated blue phosphorescent devices had a maximum luminous efficiency of 3.57 cd/A.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/mamobx/2014/mamobx.2014.47.issue-21/ma5015929/production/images/medium/ma-2014-015929_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ma5015929'>ACS Electronic Supporting Info</A></P>
Synthesis and Characterization of Iridium-Containing Green Phosphorescent Polymers for PLEDs
Xu, Fei,Kim, Hee Un,Mi, Dongbo,Lim, Jong Min,Hwang, Ju Hyun,Cho, Nam Sung,Lee, Jeong-Ik,Hwang, Do-Hoon Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.2
Two series of new green phosphorescent polymers bearing a bis(2-phenyl-pyridine)iridium(III)(dibenzoylmethane) [$(ppy)_2Irdbm$] complex were designed and synthesized. Poly-carbazole (PCbz) derivative or polyfluorene with pendant carbazole groups (PFCbz) were employed as host polymers for the iridium complex. The iridium complex monomer was copolymerized with the host monomers using varying monomer ratios via a Yamamoto coupling reaction. Efficient energy transfer from host to dopant unit was observed by increasing the ratio of the iridium guest in the copolymers. Electroluminescent devices with the configuration ITO/PEDOT:PSS/polymer/BmPyPB/LiF/Al were fabricated and characterized. The phosphorescent polymers composed of the iridium complex guest and polyfluorene with carbazole pendants as a host performed better than the polymers composed of the same guest and the main chain polycarbazole host. A maximum external quantum efficiency of 0.73%, a luminous efficiency of 1.21 cd/A, and a maximum luminance of 372 $cd/m^2$ were obtained from a device fabricated using one of the synthesized copolymers.
Xufei Li,H. Elhosiny Ali,Ibrahim Albaijan Techno-Press 2023 Advances in nano research Vol.15 No.4
Wearing the right sportswear is one of the essential points in exercising, which is mainly neglected. Sportswear should be suitable for the ambient temperature and not cause more heat or cold in the athlete's body. On the other hand, increased sweating and blood circulation during exercise should not cause fatigue or heatstroke in the athlete. Nanotechnology has grown significantly in the field of producing more efficient equipment in the field of sports. The increase in demand in sports for complete sports equipment has revealed the necessity of using the highest quality materials in this sector. In the world of championship sports, a minor change in equipment can lead to significant changes in causing failure and victory. Since the sole is the most critical part of sports shoes, with the introduction of nanotechnology and nanocomposites, it is possible to help athletes rush and increase their sense of calm and satisfaction. Using nanocomposites in the soles of shoes can improve some of their characteristics, prevent the smell and sweat of shoes, and induce water repellency in these shoes. In this research, titanium dioxide (TiO<sub>2</sub>) nanocomposite, along with cellulose, has been used to create antibacterial and hydrophobic properties in the soles of sports shoes. The synthesized nanocomposite has been synthesized using the least amount of chemicals, which shows this method's easy and cost-effective synthesis.