Visualization of Spontaneous Aggregates by Diblock Poly(styrene)-b-Poly(L-lactide)/Poly(D-lactide) Pairs in Solution with New Fluorescent CdSe Quantum Dot Labels

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	Visualization of Spontaneous Aggregates by Diblock Poly(styrene)-b-Poly(L-lactide)/Poly(D-lactide) Pairs in Solution with New Fluorescent CdSe Quantum Dot Labels
	Hou XD(侯小东) ; Li QB(李巧波) ; He Y(何勇) ; Jia L(贾林) ; Li Y(李洋) ; Zhu YD(朱英丹) ; Cao AM(曹阿民)
刊名	J. Polym. Sci. Pt. B-Polym. Phys.
	2009
卷号	47 期号:14 页码:1393-1405
ISSN号	0887-6266
其他题名	运用新的量子点标记观察溶液中聚苯乙烯嵌段聚L乳酸/聚D乳酸对的原位聚集
通讯作者	曹阿民
英文摘要	Spontaneous stereocomplex aggregation of diblock poly(styrene)-b-poly(L-lactide) PS-b-PLLA/poly(D-lactide) PDLA pairs has been investigated under ambient temperature in tetrahydrofuran solution. First, diblock PS260-b-PLLA(165) and PS260-b-PDLA(162) bearing similar lengths of respective PLLA and PDLA blocks were synthesized through controlled atom-transfer radical polymerization of styrene, and a subsequent living ring-opening polymerization of optically pure lactides, and their structures were further characterized by nuclear magnetic resonance spectroscopy (NMR) and gel-permeation chromatography (GPC). Subsequently, new enantiomeric poly(D-lactide) stabilized core-shell fluorescent CdSe quantum dots (CdSe/PDLA QD) were designed and prepared as sensitive fluorescence labels to shed new lights on the spontaneous stereocomplex aggregation in THF, which was mediated by stereocomplexation of the PLLA and PDLA chains. Upon simply mixing two individual THF solution of diblock PS260-b-PLLA(165) and HO-PDLA(30)-SH, spontaneous stereocomplex aggregation was studied, and the aggregated uniform spherical particles were observed by scanning electronic microscopy (SEM) to exhibit average particle diameters of 2.0 mu m. Finally, utilizing the prepared CdSe/PDLA QDs as new fluorescent labels, morphologies of the spontaneous aggregates by new diblock PS260-b-PLLA(165)/HO-PDLA(30)-SH pair were for the first time directly visualized by a confocal laser scanning fluorescence microscopy (CLSFM). These results might suggest alternative ways to simply prepare functional fluorescent particles with tunable diameter sizes and would be helpful to understand the mechanism of stereocomplex particle aggregation. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 1393-1.405, 2009
学科主题	高分子化学
收录类别	SCI
原文出处	http://dx.doi.org/10.1002/polb.21741
语种	英语
WOS记录号	WOS:000267444000006
公开日期	2013-03-07
内容类型	期刊论文
源URL	[http://202.127.28.38/handle/331003/22942]
专题	上海有机化学研究所_高分子材料研究室
推荐引用方式 GB/T 7714	Hou XD,Li QB,He Y,et al. Visualization of Spontaneous Aggregates by Diblock Poly(styrene)-b-Poly(L-lactide)/Poly(D-lactide) Pairs in Solution with New Fluorescent CdSe Quantum Dot Labels[J]. J. Polym. Sci. Pt. B-Polym. Phys.,2009,47(14):1393-1405.
APA	侯小东.,李巧波.,何勇.,贾林.,李洋.,...&曹阿民.(2009).Visualization of Spontaneous Aggregates by Diblock Poly(styrene)-b-Poly(L-lactide)/Poly(D-lactide) Pairs in Solution with New Fluorescent CdSe Quantum Dot Labels.J. Polym. Sci. Pt. B-Polym. Phys.,47(14),1393-1405.
MLA	侯小东,et al."Visualization of Spontaneous Aggregates by Diblock Poly(styrene)-b-Poly(L-lactide)/Poly(D-lactide) Pairs in Solution with New Fluorescent CdSe Quantum Dot Labels".J. Polym. Sci. Pt. B-Polym. Phys. 47.14(2009):1393-1405.