作者： Meng, Fangui;Zhang, Jiyao;Zhang, Zhongfeng;Seo, Hyo Jin*;Zhang, Xinmin

期刊： Ceramics International,2015年41(9):11726-11732 ISSN：0272-8842

通讯作者： Seo, Hyo Jin

作者机构： [Meng, Fangui; Zhang, Xinmin] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Zhang, Jiyao] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.;[Zhang, Zhongfeng] Cent South Univ Forestry & Technol, Dept Furniture, Changsha 410004, Hunan, Peoples R China.;[Seo, Hyo Jin] Pukyong Natl Univ, Program Biomed Mech & Elect Engn, Dept Phys & Interdisciplinary, Busan 608737, South Korea.

通讯机构： [Seo, Hyo Jin] P;Pukyong Natl Univ, Program Biomed Mech & Elect Engn, Dept Phys & Interdisciplinary, Busan 608737, South Korea.

关键词： A. Powders: solid state reaction;B. Spectroscopy;C. Optical properties

摘要： The luminescence properties of Ba3BP3O12 doped with divalent Eu2+ are investigated in the temperature range 10–525 K. Excitation and emission bands corresponding to f–d transition of Eu2+ from two crystallographic sites are identified. The PL spectra of Ba2.99Eu0.01BP3O12 sample at low temperatures further imply that the Eu2+ emission emanates from two different crystallographic sites for Ba2+ ions. The temperature dependence of emission intensity and lifetimes are studied. The luminescence intensity of Eu II does not have drastic decrease in the temperature range between 10 and 300 K, while that of Eu I decreases dramatically. Unfortunately, Ba2.99Eu0.01BP3O12 sample has poor thermal stability at temperatures higher than 300 K. The quantum yield, activation energy and thermal quenching mechanism of the luminescence are also discussed. © 2015 Elsevier Ltd and Techna Group S.r.l.

语种： 英文

作者： Zhang, Z. F.*;Huang, K.;Ye, Y. J.;Zhang, X.

期刊： Asian Journal of Chemistry,2014年26(11):3388-3390 ISSN：0970-7077

通讯作者： Zhang, Z. F.

作者机构： [Ye, Y. J.; Zhang, Z. F.; Huang, K.] Cent South Univ Forestry & Technol, Dept Furniture, Changsha, Hunan, Peoples R China.;[Zhang, X.] Cent South Univ Forestry & Technol, Dept Forestry, Changsha, Hunan, Peoples R China.

通讯机构： [Zhang, Z. F.] C;Cent South Univ Forestry & Technol, Dept Furniture, Changsha, Hunan, Peoples R China.

关键词： Biomedical molecules;Chinese plantation;Ethanol/benzene extractives;GC-MS;Pinus massoniana

摘要： Pinus massoniana plantations have been planted extensively in China. To clarify whether Pinus massoniana wood can provide rich resources for woody extractive medicine or not, the ethanol/benzene extractives from Pinus massoniana wood were obtained by the method of ethanol/benzene extraction and their chemical components were identified with gas chromatography-mass spectrometry (GCMS) to analyze the pharmacological activity of the contained biomedical molecules in this research. Seventeen chemical components were confirmed on the peaks of ethanol/benzene extractives and 81.01 % of which were esters and the main retention time of which was 20-30 min. Furthermore, the expounded pharmacological action of ethanol/benzene extractives from Chinese plantation Pinus massoniana showed Pinus massoniana wood would have a huge potential in bio-pharmaceuticals.

语种： 英文

作者： Zhang, Xinmin*;Zhang, Zhongfeng;Kim, Sun Il;Yu, Young Moon;Seo, Hyo Jin

期刊： Ceramics International,2014年40(1):2173-2178 ISSN：0272-8842

通讯作者： Zhang, Xinmin

作者机构： [Zhang, Xinmin] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Zhang, Zhongfeng] Cent South Univ Forestry & Technol, Dept Furniture, Changsha 410004, Hunan, Peoples R China.;[Seo, Hyo Jin; Kim, Sun Il; Zhang, Xinmin] Pukyong Natl Univ, Dept Phys, Pusan 608737, South Korea.;[Seo, Hyo Jin; Kim, Sun Il; Zhang, Xinmin] Pukyong Natl Univ, Interdisciplinary Program Biomed Engn, Pusan 608737, South Korea.;[Yu, Young Moon] Pukyong Natl Univ, LED Marin Convergence Technol R&BD Ctr, Pusan 608739, South Korea.

通讯机构： [Zhang, Xinmin] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： A. Powder: solid state reaction;B. Spectroscopy;C. Optical properties

摘要： Novel Eu3+ doped zirconate garnet-type ceramics, Li 7(La3-xEux)Zr2O12 with x=0, 0.001-1.0, have been synthesized by solid state reaction and the purity phase of the samples was checked by XRD. Room temperature steady and time-resolved emission spectra, under UV and visible light excitation energy, have been investigated. The concentration effect on the quenching blue emission, due to the Zr-O charge transfer transition and 5D 0→7F2 emission transition of Eu 3+ were studied in detail. The results indicate that there exists efficient energy transfer from host to Eu3+. The mechanism of interaction between Eu3+ ions has also been investigated by means of the Inokuti-Hirayama model. © 2013 Elsevier Ltd and Techna Group S.r.l.

语种： 英文