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Imaging Science and Photochemistry
2018 Vol.36 Issue.1
Published 2018-01-15

2018 Vol. 36 (1): 0-0 [Abstract] ( 8 ) [HTML 1KB] [ PDF 257KB] ( 68 )
1 The Electron-transfer and Energy-transfer between Surface Plasmon and Semiconductor in Photo-catalysts
WU Shikang
Recently, the plasmon-induced surface photo-catalytic reaction attracts more and more attention in the area of organic chemistry and the environmental sciences, because it can improve the photo-oxidation and reduction and the selectivity of reaction by electron-transfer and energy-transfer processes under excitation of sun-light.Some fundamental problems in the field of plasmon photo-catalyst have been discussed in this paper on the base of the recent international literatures. The discussed topics include:the LSPR formation under excitation of noble-metallic nano-particles by visible light and the electron-transfer between noble-metal and semi-conductor; the plasmon induced resonance energy transfer (PIRET) between plasmon particle and semi-conductor; and the effect of structure and components of plasmon catalyst on the catalytic ability of catalysts.
2018 Vol. 36 (1): 1-13 [Abstract] ( 7 ) [HTML 1KB] [ PDF 6335KB] ( 124 )
14 The Latest Research Progress of TiO2 Inverse Opal Photonic Crystal
YU Jie, CI Mingzhu, LU Quanling, MA Shuqing, JIANG Li, LEI Juying, LIU Yongdi, ZHANG Jinlong
The study of TiO2 inverse opal photonic crystal is concerned by the majority of scientists in recent years. It has the advantages of the titanium dioxide including non-toxic,the high refractive index, good biocompatibility, and excellent properties in electrochemistry, photo-catalysis, etc. And it also has optical properties of the band gap, photonic localization, slow light effect, super prism effect and negative refraction effect of the photonic crystal, which contributes to multitudinous potential applications in chemical sensors, solar cells, photo-catalysis, high efficient microwave wire,photonic crystal fiber, etc. In this paper,the preparation, modification and applications of the TiO2 inverse opal photonic crystal in recent years were summarized.
2018 Vol. 36 (1): 14-32 [Abstract] ( 9 ) [HTML 1KB] [ PDF 8745KB] ( 73 )
33 Fabrication of Transparent Conductive Films Based on Silver Nanowires and Their Applications in Printed Electronics
LIU Lanlan, ZHOU Haihua, LI Lihong, ZHANG Xingye, SONG Yanlin
Transparent conductive films have been widely used in photoelectric devices.In recent years, researchers have developed many transparent conductive films based on nanomaterials.Among them, silver nanowire transparent conductive films have excellent properties, which is the most likely material to replace ITO conductive films.This paper reported recent silver nanowire transparent conductive films, summarized the methods to improve the performance of silver nanowire transparent conductive films, and reviewed their applications in touch screen panels,solar cells, and organic light-emitting diodes.
2018 Vol. 36 (1): 33-50 [Abstract] ( 5 ) [HTML 1KB] [ PDF 11094KB] ( 84 )
51 Preparing of Viologen-prussian Blue Gel Eletrochromic Device
SONG Weiwei, WANG Yuechuan
1,1'-dihexanal-4,4'-bipyridinium chloride was designed and synthesized.For preparing a novel gel eletrochromic device,viologen was immobilized in the PVA gel electrolytes by aldolization,and the counter electrode was deposited Prussian blue via electro-deposition.This device avoids the leakaging risk of liquid electrolytes and extends the appllications of eletrochromic devices.The structure and eletrochromic porperties were studied by 1HNMR and UV-Vis spectra.The results indicate that the eletrochromic devices with viologen immobilized in gel electrolytes achieves high-performance in terms of optical contrast (47% at 530 nm), switching time(<4 s) and cyclability.
2018 Vol. 36 (1): 51-56 [Abstract] ( 4 ) [HTML 1KB] [ PDF 796KB] ( 85 )
57 Biomimetic Synthesis of CdS Quantum Dots in Living Cancer Cells
JI Haixia, DONG Lulu, DU Yan, YAO Xinyue, YANG Dongzhi
With the cervical cancer cells, HeLa, as the carrier, glutathione in living cancer cells as the modifier and stabilizer, CdS quantum dots was synthesized during the normal cells life metabolic process. The optical spectra showed that the prepared CdS quantum dots emitted at about 450 nm with the quantum yield of 5.2%. The structure characteristics by transmission electron microscopy (TEM) and X-ray powder diffraction (XRD) showed that the particles size of the prepared CdS quantum dots was about 3.0 nm with cubic crystal structure.
2018 Vol. 36 (1): 57-63 [Abstract] ( 4 ) [HTML 1KB] [ PDF 1915KB] ( 78 )
64 Synthesis,Structure and Photophysical Properties of a New Neutral Copper (Ⅰ) Complex
SUN Xiaojuan, WANG Zhiqiang, ZHANG Zhiqiang, XU Liancai
A new neutral heteroleptic copper(Ⅰ) complex supported by diimine and diphosphine ligands was successfully synthesized and characterized by 1HNMR, 13CNMR, 31PNMR and single-crystal X-ray diffraction. This complex adopts a typical distorted tetrahedral configuration and shows high stability in solid state. Theory calculation results show the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of the complex have little metal character, and the lowest energy electronic transition is mainly ligand-to-ligand charge transfer (LLCT) transition. This complex shows intense emission with relative high efficiency and long lifetime in solid state, and analysis of the photophysical data recorded at 298 K and 77 K indicates the emission is phosphorescence stemming from triplet state.
2018 Vol. 36 (1): 64-72 [Abstract] ( 4 ) [HTML 1KB] [ PDF 1644KB] ( 55 )
73 Synthesis and Photoelectric Properties of Dye Sensitizers Based on Phenothiazine as Donor
HUANG Tian, WEI Huaixin, SHEN Jinghua, LIU Yajing, CHENG Hongying, JI Zhongling, ZHAO Xin
Two organic dyes 2-cyano-3-(5-(7-(10-hexyl-10H-phenothiazin-3-yl)benzo[1,2,5]thiadiazol-4-yl) thiophen-2-yl) acrylic acid(CVBTP)and 2-cyano-3-(5-(10-hexyl-10H-phenothiazin-3-yl)thiophen-2-yl)acrylic acid (CVTP) were designed and synthesized for dye sensitized solar cells (DSSCs). The dyes are based on phenothiazine as donor with D-A-π-A and D-π-A formation, respectively. The effects of the dyes' molecular structure changes on the DSSCs performance were investigated systematically, along with their photophysical and photoelectrochemical properties. The results show that CVBTP which introduced an additional electron-deficient benzothiadiazole unit has lower band gap, larger conjugated system, and its light absorption performance is improved significantly. The HOMO energy levels of CVBTP and CVTP were -4.83 and -4.82 eV, their LUMO energy levels were -2.85 and -2.28 eV, which were matched with common electrolyte I-/I3-(-4.60 eV vs vacuum)and TiO2 conduction band energy level(-4.40 eV vs vacuum). Both of the dyes are available for DSSCs, but CVTP has a more suitable LUMO energy level and better performance of photovoltaic than CVBTP.
2018 Vol. 36 (1): 73-81 [Abstract] ( 3 ) [HTML 1KB] [ PDF 1665KB] ( 79 )
82 Synthesis of “Clickable” Acrylate Polymers and Their Thiol-alkyne Photocrosslinking Reaction
SHUI Xiaochuang, LIU Yu, WANG Yuechuan
A acetylene functionalized acrylate monomer, 1-ethynylcyclohexyl acrylate(ECA), was prepared by the esterification of acryloyl chloride with 1-ethynyl 1-cyclohexanol. Then the acetylene functionalized polyacrylates PECA and PMA-co-PECA were synthesized through the free radical homopolymerization of ECA and copolymerization of ECA with methyl acrylate(MA).The structure of PECA and PMA-co-PECA were characterized by 1HNMR, FTIR and GPC. The results suggest that the triple bonds were completely retained, and the resulting polymers were soluble in common solvents such as chloroform, dimethyl sulfoxide, tetrahydrofuran, acetone, etc. The thiol-yne reaction between PMA-co-PECA and trimethylolpropane tri(3-mercaptopropionate) (TMTP) was monitored by real-time IR, suggesting that the acetylene bearing polymers can be rapidly photocrosslinked and functionalized by thiol-alkyne reaction, and the bulk tertairy group does not affect the reactivity of the thiol-yne reaction.The gel fraction of the yeilding network was found to be more than 90%.
2018 Vol. 36 (1): 82-88 [Abstract] ( 8 ) [HTML 1KB] [ PDF 1533KB] ( 84 )
89 Nanodiamonds Raman Probes for Visualizing the Interaction between Antimicrobial Peptide and Bacteria
LI Dandan, CHEN Xin, WANG Hong, FU Yang, YU Yuan, ZHI Jinfang
This article realizes the application of nanodiamonds (NDs) Raman probes for vital activity observation in bacteria system. The antimicrobial peptide thanatin was immobilized on 100 nm NDs, and the interaction of the NDs-thanatin conjugate with Bacillus subtilis was visualized via Raman imaging with the intrinsic diamond Raman signal (1332 cm-1) as label. Scanning electron microscope was further utilized to verify the practicability of Raman mapping. Besides, antibacterial activity of NDs-thanatin conjugate was validated, suggesting the adsorbed thanatin on NDs remained superior capability. The results showed the feasibility of nanodiamonds as Raman probes to visualize the bacteria activity, indicating the potential use of NDs in bio-imaging applications.
2018 Vol. 36 (1): 89-99 [Abstract] ( 2 ) [HTML 1KB] [ PDF 3792KB] ( 55 )
100 Molecular Copper Catalyst Applied in Photoelectrochemical Device for Water Oxidation
LU Yongbin, XIN Zhijuan, LIU Si, LEI Youjia, WANG Hongyan
Here, we presented a photoelectrochemical device for water oxidation based on a photosensitizer[Ru(bpy)2(H2dcbpy)](PF6)2 (bpy=2,2'-bipyridine; H2dcbpy=2,2'-bipyridine-4,4'-dicarboxylic acid) and a molecular catalyst Cu(F3TPA)(ClO4)2[F3TPA=tris((6-fluoropyridin-2-yl)methyl)amine].8.3×10-8 mol·cm-2 and 5.56×10-8 mol·cm-2 photosensitizer and catalyst were located on TiO2/FTO electrode respectively. A photocurrent density 20 μA/cm2 was obtained when a 0.2 V vs NHE external bias was applied. Continuous light-irradiation with LED for 300 s, the catalytic activity and stability can be well maintained.
2018 Vol. 36 (1): 100-107 [Abstract] ( 4 ) [HTML 1KB] [ PDF 2848KB] ( 74 )
108 Synthesis of Water Soluble Nitrogen-doped Graphene Quantum Dots and Its Fluorescence Recognition of Pb2+
QIU Shenbao, WANG Sumin, WANG Qiguan, SHANG Jiayin, ZHANG Wenzhi, YANG Lei, FAN Yaru
In this paper, a facile approach for producing the nitrogen doped graphene quantum dots (N-GQDs) was carried out through solvothermal treatment. The graphene quantum dots (GQDs) derived from carbon fibers in N,N-dimethylformamide. The nitrogen content and the fluorescent quantum yield (QY) could be enhanced by prolonging the reaction time, and simultaneously the fluorescent color of the N-GQDs changed from orange to green and blue. Compared with low QY of 4.0% of GQDs, high QY of 30.1% could be reached by the blue fluorescent N-GQDs with the nitrogen content of 7.7% with solvothermal treatment of 24 h. Doping with nitrogen not only increase the content of C-N bonds, but also enhance the order of the structure, thus inceasing the fluorescent QY of N-GQDs. As a fluorescent probe, the N-GQDs could selectively detect the Pb2+ in aqueous solution. The N-GQDs fluorescence probe could be used to determine the level of Pb2+ in water sample in the range of 8.0×10-7 mol/L to 1.5×10-4 mol/L. Compared with the GQDs, the selectivity of the N-GQDs to Pb2+ was enhanced by the nitrogen doping.
2018 Vol. 36 (1): 108-116 [Abstract] ( 6 ) [HTML 1KB] [ PDF 4499KB] ( 71 )
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