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chemjl

银虫 (小有名气)

[交流] 英译汉(化学类配合物)(请slowstar帮忙)

Lanthanides doped inorganic or organic materials have been fabricated via sol-gel chemistry or coordination reactions.The direct inclusion or in situ formation of chelated lanthanides inside sol gel-derived matrices leads to the formation of hybrid materials with generally improved luminescent properties. For example, the condensation of trialkoxysiyl-functionalized chromophores in the presence of lanthanides leads to the formation of nanostructured hybrids with strong fluorescence emission even at low lanthanide ion concentration. Functionalized carbon nanotubes (CNTs) are found to be able to elongate fluorescence lifetime of the rare-earth complex, then the CNTs hosted lanthanide complexes have found important applications in drug carrier and biomarker fields.
Clay minerals are attractive inorganic hosts for functional inorganic organic hybrids because of their swelling properties and charged surfaces which could be easily modified. Clays have been successfully used as vectors for delivery of DNA to cells.18,19Clay-modified electrodes have been developed as electrochemical sensors. Functionalized clays with luminescent properties also find their way in photoelectricity and fluorescence probe applications. Tetsuka et al. incorporated quantum dots into clay hosts and prepared flexible CdSe/ZnS-clay films with high photoluminescence efficiency that are promising materials for optoelectronic devices such as light emitting devices. Celedon et al. intercalated complexes of triplet europium ions (Eu3) and terbium ions (Tb3) with 2,2-bipyridine and 1,10-phenanthroline (phen) into natural bentonite, and found the luminescence intensity of the intercalated products was comparable to that of the free complexes and the stability of the complex against hydrolysis was improved. Lezhnina et al. investigated the effects of iron impurities on the luminescence properties of rare-earth doped clay hybrids.
文章出处  
J. Phys. Chem. C 2009, 113, 16238–16246
Synthesis and Characterization of Photoluminescent Eu(III) Coordination Halloysite Nanotube-Based Nanohybrids

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木虫 (职业作家)

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chemjl(金币+100):谢谢! 1-24 18:34
稀土络合物除了用于半导体量子点、有机染料、荧光指示蛋白质外,还是重要的发光材料,而且作为光敏材料在生物领域的应用也受到了极大关注1-3。与一般的发光材料相比,镧系络合物具有很高的光致发光效率、窄带发射谱、较大的Stokes迁移和较长的荧光寿命,这些优点使得镧系络合物在放射性探针和有机染料4 方面是个有用的备选材料。尤其特别的是,镧系金属对于人类是无毒的5 ,而且其相应的配位聚合物是有效的催化剂和抗微生物试剂6 。
     已有足够数据表明稀土络合物可由配体单线态(S1)和三线态(T1)之间的高效能级间转换、进而到达中心稀土金属离子的激发态这样的过程来表征7 。根据5Dx-7Fx 跃迁,金属离子具有狭窄的光谱带。由于单线态和三线态激发均参与了发光过程,因而可望通过将金属离子掺杂到适当的主体分子阵列来优化固态系统的能量转移,从而实现较高的稀土金属离子激发效率3,4,8 。
    镧系掺杂无机或有机材料可通过溶胶-凝胶化学或者配位反应来构造8-14 。用直接包埋或原位生成法将镧系金属引入由溶胶-凝胶过程得到的阵列一般可获得发光效率提高了的杂化材料9-11 。例如,将含有镧系金属的三烷氧基硅基-功能化发光体进行缩聚可得到即使镧系金属离子浓度很低也具有很强荧光发射的纳米结构杂化体11 。功能化碳纳米管(CNTs)被发现能够延长稀土络合物的荧光寿命,使得CNTs为主体的镧系络合物在药物载体和生物标志领域有了重要应用15-17 。
    黏土矿物是很吸引人的功能化无机-有机杂化体的无机主体,因为它们的膨胀性和带电荷的表面使其很容易被修饰改性。黏土已被成功作为载具将DNA输送到细胞18,19 。黏土改性的电极已被发展为电化学传感器20 。具有发光性质的功能化黏土同样在光电学和荧光探针领域找到了自己的一席之地21-23 。Tetsuka等人21 将量子点组合进黏土主体制得柔韧的CdSe/ZnS-黏土 薄膜,该薄膜具有高的光致发光效率可望用于光电装置如发光装置(LEDs)。Celedon等人22 将三价铕离子(Eu3+)及铽离子(Tb3+)与2,2-联吡啶及1,10-菲咯啉(phen)的络合物内插到天然膨润土里,发现内插产物的发光强度与单纯的络合物的发光强度不相上下,并且该络合物的抗水解稳定性得到了提高。Lezhnina等人23 研究了铁杂质对稀土掺杂黏土杂化体发光性质的影响。
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3楼2010-01-24 17:54:03
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slowstar

木虫 (职业作家)

已译好一部分,争取今晚把Introduction全译完。
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2楼2010-01-24 14:52:26
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