Highly Photostable Luminescent Poly(ε-caprolactone)siloxane Biohybrids Doped with Europium Complexes
作者： M. Fernandes , V. de Zea Bermudez , R. A. Sá Ferreira , L. D. Carlos , A. Charas
DOI: 10.1021/CM062832N
关键词: Siloxane 、 Lanthanide 、 Europium 、 Polymer chemistry 、 Caprolactone 、 Luminescence 、 Organic chemistry 、 Materials science 、 Quantum efficiency 、 Molecule 、 Quenching (fluorescence)
摘要: In this paper, we propose for the first time that combination of a sol−gel derived diurethane cross-linked siloxane-based biohybrid host including short poly(e-caprolactone) segments (PCL(530)) and lanthanide aquocomplexes incorporating β-diketonate ligands yields an effective protecting cage efficiently encapsulates emitting centers reduces luminescence quenching. The results obtained using Eu(tta)3(H2O)2 (where tta- is 2-thenoyltrifluoracetonate) complex demonstrate 1 (2) carbonyl oxygen atoms matrix enter Eu3+ coordination shell, thus replacing labile water molecule(s). significant increase in quantum efficiency q doped hybrid with respect to (44.2 versus 29.0%, respectively) reveals anchoring PCL(530)-based structure contributes enhancement 5D0 efficiency. However, when contains only strong chelating ligands, such as Eu(tta)3phen phen 1,10-phenantrolin...
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sci-hub.se 参考文章(75)
Koen Binnemans, Rare-earth beta-diketonates Handbook on the Physics and Chemistry of Rare Earths. ,vol. 35, pp. 107- 272 ,(2005) , 10.1016/S0168-1273(05)35003-3
E.J.A. Pope, J.D. Mackenzie, Sol-gel processing of silica. II: The role of the catalyst Journal of Non-crystalline Solids. ,vol. 87, pp. 185- 198 ,(1986) , 10.1016/S0022-3093(86)80078-3
QIAN GUODONG, WANG MINQUAN, WANG MANG, FAN XIANPING, HONG ZHANGLIAN, Synthesis in situ of 2,2'-dipyridyl-Tb(III) complexes in silica gel Journal of Materials Science Letters. ,vol. 16, pp. 322- 323 ,(1997) , 10.1023/A:1018521722710
P. A. Tanner, Bing Yan, Hongjie Zhang, Preparation and luminescence properties of sol-gel hybrid materials incorporated with europium complexes Journal of Materials Science. ,vol. 35, pp. 4325- 4328 ,(2000) , 10.1023/A:1004892520502
Fengyi Liu, Lianshe Fu, Jun Wang, Qingguo Meng, Huanrong Li, Junfang Guo, Hongjie Zhang, Luminescent film with terbium-complex-bridged polysilsesquioxanes New Journal of Chemistry. ,vol. 27, pp. 233- 235 ,(2003) , 10.1039/B206815J
M. D. McGehee, T. Bergstedt, C. Zhang, A. P. Saab, M. B. O’Regan, G. C. Bazan, V. I. Srdanov, A. J. Heeger, Narrow Bandwidth Luminescence from Blends with Energy Transfer from Semiconducting Conjugated Polymers to Europium Complexes Advanced Materials. ,vol. 11, pp. 1349- 1354 ,(1999) , 10.1002/(SICI)1521-4095(199911)11:16<1349::AID-ADMA1349>3.0.CO;2-W
LD Carlos, RA Sá Ferreira, RN Pereira, M Assunção, V de Zea Bermudez, None, White-Light Emission of Amine-Functionalized Organic/Inorganic Hybrids: Emitting Centers and Recombination Mechanisms Journal of Physical Chemistry B. ,vol. 108, pp. 14924- 14932 ,(2004) , 10.1021/JP049052R
M. C. Gonçalves, N. J. O. Silva, V. de Zea Bermudez, R. A. Sá Ferreira, L. D. Carlos, K. Dahmouche, C. V. Santilli, D. Ostrovskii, I. C. Correia Vilela, A. F. Craievich, Local structure and near-infrared emission features of neodymium-based amine functionalized organic/inorganic hybrids. Journal of Physical Chemistry B. ,vol. 109, pp. 20093- 20104 ,(2005) , 10.1021/JP052097N
Martinus H. V. Werts, Ronald T. F. Jukes, Jan W. Verhoeven, The emission spectrum and the radiative lifetime of Eu3+ in luminescent lanthanide complexes Physical Chemistry Chemical Physics. ,vol. 4, pp. 1542- 1548 ,(2002) , 10.1039/B107770H
R Moleski, E Stathatos, V Bekiari, P Lianos, Preparation of thin Ureasil films with strong photoluminescence based on incorporated europium–thenoyltrifluoroacetone–bipyridine complexes Thin Solid Films. ,vol. 416, pp. 279- 283 ,(2002) , 10.1016/S0040-6090(02)00603-X