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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Rapid Communication in Photoscience
Journal Basic Information
Journal DOI :
Korean Society of Photoscience
Editor in Chief :
Yong Rok Kim
Volume & Issues
Volume 2, Issue 3 - Sep 2013
Volume 2, Issue 2 - Jun 2013
Volume 2, Issue 1 - Mar 2013
Selecting the target year
Microflow Photochemistry - Acetone sensitized Addition of Isopropanol to (5R)-5-Menthyloxy-2-(5H)-furanone
Aida, Shin ; Nishiyama, Yasuhiro ; Kakiuchi, Kiyomi ; Hoffmann, Norbert ; Fon, Adeline ; Oelgemoller, Michael ;
Rapid Communication in Photoscience, volume 2, issue 3, 2013, Pages 68~71
DOI : 10.5857/RCP.2013.2.3.68
Acetone sensitized photoadditions of isopropanol to (5R)-5-menthyloxy-2-(5H)-furanone were investigated in two different microflow reactor systems. Setup A employed a commercially available glass reactor under a UVB-panel. Setup B utilized a FEP microcapillary wrapped tightly around a Pyrex cylinder with a single UVB fluorescent tube at its center. The reactions under flow conditions were subsequently compared to analogue reactions conducted in a batch chamber reactor. Overall, the microflow systems gave faster conversions and higher isolated yields. The flexible microcapillary setup, however, showed the best performance and promise in terms of future scale-up and reactor optimization.
Photodynamics of an excited triplet state in the presence of molecular oxygen cluster
Nishimura, Yoshinobu ;
Rapid Communication in Photoscience, volume 2, issue 3, 2013, Pages 72~75
DOI : 10.5857/RCP.2013.2.3.72
Bulk nanobubble is one of the nanoscopic gaseous state found in the solution. We measured transient absorption spectra of eosin Y in the excited triplet state (
) to elucidate differences in the dissipation process of the bulk nanobubble of oxygen molecule at air pressure. The time dependence of the oxygen dissipation process was classified three time domains (P1, P2 and P3). The comparison of ordinary bubbling method gave different results at P3 in contrast to similar results at P1 and P2, indicating the existence of characteristic dissolving state in the case of nanobubble.
Comparison of Photoaddition Reactions of Aromatic Carbonyl Compounds with Silyl Thioketene Acetal vs. Silyl Ketene Acetal
Lee, In Ok ; Yoon, Ung Chan ; Cho, Dae Won ;
Rapid Communication in Photoscience, volume 2, issue 3, 2013, Pages 76~78
DOI : 10.5857/RCP.2013.2.3.76
Photoaddition reactions of aromatic carbonyl compounds with silyl thioketene acetals have been explored. The results of this study show that the acetonphenone react with dimethyl substituted silyl thioketene acetal competitively via either single electron transfer (SET)-desilylation or [2+2]-cycloaddition pathways to produce b-hydroxyester and oxetanes. In contrast, photochemical reactions of the benzaldehyde with dimethyl substituted silyl thioketene acetal mainly lead to the formation of oxetanes arising by [2+2] cycloaddition. A comparison of the results with those of silyl ketene acetal revealed that replacement of sulfur atom in
-silyl donor substrate bring about dramatic changes in chemoselectivities as well as excited state reaction mechanism.
An Electrochemical Approach for Fabricating Organic Thin Film Photoelectrodes Consisting of Gold Nanoparticles and Polythiophene
Takahashi, Yukina ; Umino, Hidehisa ; Taura, Sakiko ; Yamada, Sunao ;
Rapid Communication in Photoscience, volume 2, issue 3, 2013, Pages 79~81
DOI : 10.5857/RCP.2013.2.3.79
A novel method of fabricating polythiophene-gold nanoparticle composite film electrodes for photoelectric conversion is demonstrated. The method includes electrodeposition of gold and electropolymerization of 2,2'-bithiophene onto an indium-tin-oxide (ITO) electrode. First, electrodeposition of gold onto the ITO electrode was carried out with various repetition times of pulsed applied potential (0.25 s at -2.0 V vs. Ag/AgCl) in an aqueous solution of
. Significant progress of the number density of deposited gold nanoparticles was confirmed from scanning electron micrographs, from 4 (1 time) to 25% (15 times). Next, electropolymerization of 2,2'-bithiophene onto the above ITO electrode was performed under controlled charge condition (+1.4 V vs. Ag wire, 15
). Structural characterization of as-fabricated films were carried out by spectroscopic and electron micrographic methods. Photocurrent responses from the sample film electrodes were investigated in the presence of electron acceptors (methyl viologen and oxygen). Photocurrent intensities increased with increasing the density of deposited gold nanoparticles up to ~10%, and tended to decrease above it. It suggests that the surplus gold nanoparticles exhibit quenching effects rather than enhancement effects based on localized electric fields induced by surface plasmon resonance of the deposited gold nanoparticles.
Preparation of TiO
Nanowires/Nanoparticles Composite Photoanodes for Dye-sensitized Solar Cells
Heo, Sung Yeon ; Chi, Won Seok ; Kim, Jin Kyu ; Lee, Chang Soo ; Kim, Jong Hak ;
Rapid Communication in Photoscience, volume 2, issue 3, 2013, Pages 82~84
DOI : 10.5857/RCP.2013.2.3.82
We fabricated dye-sensitized solar cells (DSSCs) with
nanowire (NW)/nanoparticle (NP) composite and solidified nanogel as the photoelectrode and electrolyte, respectively.
NWs were generated via pore-infiltration of titanium (IV) isopropoxide (TTIP) into a track-etched polycarbonate membrane with a pore diameter of 100 nm, followed by calcination at
. Energy conversion efficiency of
NW/NP-based DSSCs was always higher than that of NP-based cells. We attributed this to improved light scattering and electron transport by
NWs, as verified by intensity modulation photocurrent spectroscopy (IMPS) and intensity modulation photovoltage spectroscopy (IMVS) analyses. Quasi-solid-state DSSCs with NW/NP composites exhibited 5.0% efficiency at 100
, which was much greater than that of NP-based cells (3.2%).
Quasi-solid state electrolytes with silica nanomaterial for high efficiency dye-sensitized solar cells
Jeon, Semina ; Lim, Jeongmin ; Han, Chi-Hwan ; Jun, Yongseok ;
Rapid Communication in Photoscience, volume 2, issue 3, 2013, Pages 85~88
DOI : 10.5857/RCP.2013.2.3.85
Silica nanoparticles were synthesized with various silane coupling agents to make specific pathway of electrons and anti-recombination system when solidifying liquid electrolytes. In this study, we used an appropriate method of synthesis for activated silica nanoparticles and silane coupling agents with 3-(triethoxysilyl)propionitrile, Trimethoxy[3-(methylamino)propyl]silane, Triethoxyoctylsilane, and octadecyltrimethoxy silane. Dye-sensitized solar cells using solidified electrolytes with silica nanoparticles exhibit comparatively excellent efficiency, ranging from 2.3 to 7.0% under similar conditions.