闫冰
从事稀土功能分子发光材料、稀土杂化分子发光材料和稀土微纳米固体发光材料三个方面的研究工作
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- 姓名:闫冰
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
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学科领域:
无机化学
- 研究兴趣:从事稀土功能分子发光材料、稀土杂化分子发光材料和稀土微纳米固体发光材料三个方面的研究工作
闫冰,男,1970年12月29日生于吉林长春,汉族。1992年7月、1995年7月分别在哈尔滨工业大学应用化学系获工学学士和硕士学位;1998年7月在中国科学院长春应用化学研究所无机化学专业获理学博士学位,导师为倪嘉缵院士和张洪杰研究员。1998年8月-2001年9月先后在香港城市大学生物与化学系从事合作研究、北京大学化学与分子工程学院和加拿大舍布鲁克化学系从事博士后研究。2001年11月任同济大学化学系教授,2003年6月聘为博士生导师。闫冰教授作为主要研究者先后参加了国家自然科学基金重点项目子课题两项、国家重点基础研究规划项目子课题一项、中国科学院重大基金项目一项等。目前主持国家自然科学基金等科研项目。系统开展稀土功能化学与先进材料的研究工作,以第一作者和通讯作者在被SCI收录的国际英文学术刊物上发表论文120余篇,被引用450余次。2000年6月受聘为哈尔滨工业大学理学院兼职教授;曾先后获得中国科学院院长奖学金、中国科学院稀土化学与物理重点实验室青年科学一等奖、1998年度全国SCI个人排名第九名等。早期曾在稀土有机配合物的发光、能量传递及应用及稀土-过渡金属氰根桥连配合物分子的结构和磁化学取得有意义的成果。目前从事稀土功能分子发光材料、稀土杂化分子发光材料和稀土微纳米固体发光材料三个方面的研究工作,其中在稀土杂化分子发光材料的研究在国际上具有明显特色和影响。应邀为Nova Science Publishers出版的“New Research on Optical Materials”撰写综述性评论“Chemical Synthesis and Photoluminescence of Micrometer and Submicrometer Rare Earth Phosphors by Hybrid Precursors”和Research Signpost publisher India出版的“Photo/Electrochemistry & Photobiology in the Environment, Energy and Fuel (PE&P in EEF)”撰写综述性评论“From Molecules to Materials, Construction of Luminescent Rare Earth/Inorganic/Organic Molecular Hybrid Materials with Strong Chemical Bond by the Modified Functional Ligand Bridge”。作为Adv. Funct. Mater.、J. Phys. Chem. B、Inorg. Chem.、J. Solid State Chem.、J. Mater. Res.、J. Non-cryst. Solids等国际杂志的论文审稿人。
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闫冰, Q.M. Wang, B. Yan*
Journal of Photochemistry and Photobiology A: Chemistry 178(2006)70~75,-0001,():
-1年11月30日
We report a novel technology for fabricating sol-gel derived nano-scale molecular hybrid materials that contain NHC( O)NH groups anchored to a silica network. The modified 2-amino pyridine is grafted by 3-(triethoxysilyl)-propyl isocyanate and applied to coordinate to RE3+ (Eu3+, Tb3+) through nitrogen atoms of the heterocycle of pyridine group and further formed Si O backbones after hydrolysis and polycondensation processes. For analogy and luminescence efficiency purpose, we added 1,10-phenanthroline to the above hybrids in order to increase the conjugating effects and sensitize rare earth ions emissions. IR, ultraviolet absorption and luminescence spectra were utilized to characterize the structure and photophysical properties of the obtained hybrid material and the above spectroscopic data reveal that the triplet energy of 1,10-phenanthroline in this favorable hybrid system matches with the emissive energy level of RE3+.
Nanophosphors, Molecular-based hybrid materials, Luminescence, Rare earth ions
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【期刊论文】Terbium/zinc luminescent hybrid siloxane-oxide materials bridged by novel ureasils linkages
闫冰, Qian-Ming Wang, Bing Yan*
Journal of Organometallic Chemistry 691(2006)545~550,-0001,():
-1年11月30日
Covalently bonded silicate/modified aromatic acid luminescent composites have been prepared from 3-(triethoxysilyl)-propyl isocyanate (TEPIC) grafted salicylic acid and central metal ions (Tb, Zn). The existence of covalent linkages between TEPIC and silica matrices were realized by after hydrolysis and polycondensation processes of ethoxysilyl groups. Luminescence spectra were utilized to characterize the photophysical properties of the obtained hybrid material and the above spectroscopic data reveal that the triplet energy of modified salicylic acid in this favorable hybrid system matches with the emissive energy level of Tb3+. In addition, Zn containing hybrids exhibit a broad band around 420 nm which may be beneficial to fabricate blue emission materials.
Molecular-based hybrid materials, Luminescence, 3-(, Triethoxysilyl), -propyl isocyanate
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闫冰, Q. M. Wang and B. Yan*
Crystal Grawth & Design, Vol.5, No.2, 2005, 497~503,-0001,():
-1年11月30日
The syntheses of modified nicotinic and picolinic acid by (3-aminopropyl)triethoxysilane and the preparation of their corresponding organic-inorganic molecular-based hybrid materials with the two components equipped with covalent bonds are described. The organic part is a derivative of heterocyclic compounds which is used to coordinate to Tb3+ and further introduced into silica matrixes by Si-O bonds after hydrolysis and polycondensation processes. According to the Judd-Ofelt theory, covalency increases with the increasing reciprocal energy difference between the 4fN and 4fN-15d1 configurations. Infrared, ultraviolet absorption, phosphorescence spectra, and luminescence spectra were applied to characterize the photophysical properties of the obtained hybrid material, and the above spectroscopic data revealed that the triplet energy of modified heterocyclic acid especially the modified nicotinic acid matched the emissive energy level of Tb3+. In this way, an intramolecular energy transfer process took place within these molecular-based hybrids and strong green emission of Tb3+ was achieved.
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闫冰, Qian-Ming Wang, Bing Yan∗
Journal of Photochemistry and Photobiology A: Chemistry 175(2005)159~164,-0001,():
-1年11月30日
The study focuses on the syntheses of modified chloronictinic acid by (3-aminopropyl)triethoxysilane and the preparation of their corresponding organic-inorganic molecular-based hybrid material with the two components equipped with covalent bonds. The bridging unit is a derivative of 2-chloronictinic acid (ClNIC-Si) which is utilized to coordinate to Tb3+or Eu3+(abbreviated as RE3+) and further introduced into silica matrices by Si O bonds after hydrolysis and polycondensation processes. Ultraviolet absorption, phosphorescence spectra, and fluorescence spectra were applied to characterize the photophysical properties of the obtained hybrid material and the above spectroscopic data present that the triplet energy of modified chloronictinic acid efficiently initiates the antenna effect and matches with the emissive energy level of RE3+. Accordingly, the intramolecular energy transfer process completed within these molecular-based hybrids and strong green or red emissions of RE3+ have been obtained.
Terbium ions, Molecular-based, Luminescence, Hybrids
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闫冰, Qian-Ming Wang, Bing Yan∗, Xin-Hua Zhang
Journal of Photochemistry and Photobiology A: Chemistry 174(2005)119~124,-0001,():
-1年11月30日
Maleic anhydride was grafted by long chain alcohol 1-eicosanol to a novel sort of corresponding monoester, mono-eicosyl cis-butene dicarboxylate. Then the four novel ternary lanthanide (Eu3+, Tb3+, Dy3+, Gd3+) complexes with the as-derived long chain monoester and a second ligand 1,10-phenanthroline were synthesized and characterized by elemental analysis, IR spectra. The photophysical properties of these complexes were studied in detail with ultraviolet absorption spectra, low temperature phosphorescent spectra, fluorescent spectra and luminescent lifetimes, indicating that the intramolecular energy transfer mechanism runs smoothly within these ternary complexes in terms of sensitized functions of 1,10-phenanthroline and strong characteristic green, red or blue emissions of Tb3+, Eu3+ or Dy3+have been achieved.
Lanthanide complexes, Long chain maleic monoester, 1,, 10-Phenanthroline, Energy transfer, Fluorescence
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闫冰, Hong Hua Huang, Bing Yan*
Inorganic Chemistry Communications 7(2004)919~922,-0001,():
-1年11月30日
Mg2Gd8(SiO4)6O2 doped with Tb3+ was in situ synthesized by a novel hybrid precursors assembly sol-gel technology. The particle size of luminescent materials is in the range of 60-100 nm characterized by XRD and especially SEM shows that there exist some novel unexpected morphological structures owing to multicomponent hybrid precursors. The photoluminescence property of Mg2Gd8(SiO4)6O2:Tb3
Luminescence, Nanophosphors, Coral-like morphology, Doped Tb3
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闫冰, Honghua Huang, Bing Yan*
H. Huang, B. Yan/Solid State Communications 2 xx(xxxx)1~5,-0001,():
-1年11月30日
Y2SiO5 doped with Eu3C were in situ synthesized by a hybrid precursor assembly sol-gel technology employing four different silicate sources, 3-aminopropyl-trimethoxysilane (APMS), 3-aminopropyl-triethoxysilane (APES), 3-aminopropylmethyl-diethoxysilane (APMES) and tetraethoxysilane (TEOS), respectively. The SEM result shows that there exist some novel unexpected morphological microrod structures owing to using the crosslinking reagents other than TEOS as silicate source. The photoluminescent properties of Y2SiO5:Eu3C have been studied as a function of Eu3C doping concentration. A crossrelaxation process between identical Eu3C ions results in the quenching of the 5D1 emission for high concentration sample.
A., Microrod phosphor, B., In situ sol-gel, D., Luminescent properties, E., Luminescence
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闫冰, Song Yi-Shana, Yan Binga, *, Chen Zhen-Xiab
Journal of Solid State Chemistry 177(2004)3805~3814,-0001,():
-1年11月30日
Five novel lanthanide (Eu3+ (1), Tb3+ (2), Sm3+ (3), Dy3+ (4) and Gd3+ (5)) complexes with 5-Bromonicotinic acid (5-Brnic) were synthesized and two of them (Tb3+, Sm3+) were characterized by X-ray diffraction. The results reveal that {[Tb(5-Brnic)3(H2O)3]•H2O}n (2) and [Sm(5-Brnic)3(H2O)2•H2O]2 (3) exhibit different coordination geometries and crystal structures. Complex 2 has a one-dimensional chain-like polymeric structure through the bridged 5-Brnic anions which links up two neighboring terbium ions, while Complex 3 forms a dimeric molecular structure. The lowest triplet state energy of 5-Brnic was determined to be 24 330 cm 1 corresponded to the 0-0 transition in the phosphorescence spectrum of its gadolinium complex at 411 nm. The strong luminescent emission intensities of these complexes indicated that the triplet state energy of 5-Brnic is suitable for the sensitization of luminescence of Eu3+, Tb3+, Sm3+and Dy3+, especially for that of Tb3+and Dy3+.
Lanthanide complexes, Crystal structure, Photophysical properties, 5-Bromonicotinic acid
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闫冰, Qian-Ming Wang a, Bing Yan a, b, *
Journal of Photochemistry and Photobiology A: Chemistry 177(2006)1~5,-0001,():
-1年11月30日
Three binary europium complexes with benzoic acid and ortho (meta) methylbenzoic acids in the first stage. Then, these complexes were introduced into 4-vinyl pyridine-ethyl methacrylate co-polymer hosts using the former component as the second ligand. The composition of the hybrids was characterized by FT-IR and the photophysical property of them was investigated by UV spectra, luminescent spectra and luminescent lifetimes. The experiment results substantiate that 4-vinyl pyridine could co-ordinate to europium ions effectively with nitrogen atoms of the pyridine ring. Therefore, the intramolecular energy transfer process accomplished within polymer hybrids and red emissions ofEu3+ have been obtained.
Europium ions, 4-Vinyl pyridine-methacrylate co-polymer, Luminescence, Hybrids
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闫冰, Qianming Wanga and Bing Yan*a, b
J. Mater. Chem., 2004, 14, 2452~2454,-0001,():
-1年11月30日
A novel type of sol-gel-derived organic-inorganic molecular-based hybrid material with the two parts covalently linked together via Tb-O and Si-O bonds was synthesized. The organic component was obtained from a derivative of meta-aminobenzoic acid (MAB) which is modified by 3-(triethoxysilyl)-propyl isocyanate, and then the precursor is applied to coordinate to Tb31 with the carboxyl group and its triethoxysilyl moiety is capable of undergoing polymerization or cross-linking reactions with TEOS (tetraethoxysilane). Accordingly, the final hybrid material is formed by a combination of hydrolysis and polycondensation processes of two ethoxy groups (both MAB-Si and TEOS). Ultraviolet absorption, phosphorescent and fluorescent spectra were used to investigate the photophysical properties of the hybrid material, which reveal that the triplet energy of modified meta-aminobenzoic acid matches with the emissive energy level of Tb31. In this way, the intramolecular energy transfer process took place within this molecular-based hybrid and a strong green emission of Tb31 was achieved.
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