Effect of the functionalization of the axial phthalocyanine ligands on the energy transfer in QD-based donor-acceptor pairs

被引:29
作者
Dayal, Smita [1 ]
Li, Jun [1 ]
Li, Ying-Syi [1 ]
Wu, Hongqiao [1 ]
Samia, Anna C. S. [1 ]
Kenney, Malcolm E. [1 ]
Burda, Clemens [1 ]
机构
[1] Case Western Reserve Univ, Dept Chem, Ctr Chem Dynam & Nanomat Res, Cleveland, OH 44106 USA
关键词
D O I
10.1111/j.1751-1097.2007.00227.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
This study examines the electronic coupling between quantum dots (QDs) and molecules on their surfaces as a function of the modality of their interaction. As a probe, the energy transfer (ET) between CdSe QDs and phthalocyanines (PCs) was monitored and evaluated with regard to the functionalization of the axial phthalocyanine ligand, bulkiness of the functional group bridging the QD donor and Pc acceptor, and the number of the functionalized axial ligands. New silicon PCs and their conjugates with CdSe QDs were synthesized. The ET efficiency and kinetics were studied by steady state and femtosecond time-resolved absorption spectroscopy. We observed a decrease in ET efficiency with the increase in functional group bulkiness, which could be explained by increasing steric hindrance between the ET pair. In addition, a higher ET efficiency was observed for amino and thiol functionalized PCs compared to Pcs without functional group on the axial alkyl chain.
引用
收藏
页码:243 / 249
页数:7
相关论文
共 27 条
[1]   Synthesis and photophysical properties of silicon phthalocyanines with axial siloxy ligands bearing alkylamine termini [J].
Anula, HM ;
Berlin, JC ;
Wu, HQ ;
Li, YS ;
Peng, XZ ;
Kenney, ME ;
Rodgers, MAJ .
JOURNAL OF PHYSICAL CHEMISTRY A, 2006, 110 (15) :5215-5223
[2]   Quantum dots as photosensitizers? [J].
Bakalova, R ;
Ohba, H ;
Zhelev, Z ;
Ishikawa, M ;
Baba, Y .
NATURE BIOTECHNOLOGY, 2004, 22 (11) :1360-1361
[3]  
BERLIN JC, 2006, THESIS CASE W RESERV
[4]   Semiconductor nanocrystals as fluorescent biological labels [J].
Bruchez, M ;
Moronne, M ;
Gin, P ;
Weiss, S ;
Alivisatos, AP .
SCIENCE, 1998, 281 (5385) :2013-2016
[5]   (CdSe)ZnS core-shell quantum dots: Synthesis and characterization of a size series of highly luminescent nanocrystallites [J].
Dabbousi, BO ;
RodriguezViejo, J ;
Mikulec, FV ;
Heine, JR ;
Mattoussi, H ;
Ober, R ;
Jensen, KF ;
Bawendi, MG .
JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (46) :9463-9475
[6]   Femtosecond time-resolved energy transfer from CdSe nanoparticles to phthalocyanines [J].
Dayal, S. ;
Krolicki, R. ;
Lou, Y. ;
Qiu, X. ;
Berlin, J. C. ;
Kenney, M. E. ;
Burda, C. .
APPLIED PHYSICS B-LASERS AND OPTICS, 2006, 84 (1-2) :309-315
[7]   Observation of non-Forster-type energy-transfer behavior in quantum dot-phthalocyanine conjugates [J].
Dayal, Smita ;
Lou, Yongbing ;
Samia, Anna Cristina S. ;
Berlin, Jeffrey C. ;
Kenney, Malcolm E. ;
Burda, Clemens .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (43) :13974-13975
[8]   Intracellular delivery of quantum dots for live cell labeling and organelle tracking [J].
Derfus, AM ;
Chan, WCW ;
Bhatia, SN .
ADVANCED MATERIALS, 2004, 16 (12) :961-+
[9]   *ZWISCHENMOLEKULARE ENERGIEWANDERUNG UND FLUORESZENZ [J].
FORSTER, T .
ANNALEN DER PHYSIK, 1948, 2 (1-2) :55-75
[10]   In vivo cancer targeting and imaging with semiconductor quantum dots [J].
Gao, XH ;
Cui, YY ;
Levenson, RM ;
Chung, LWK ;
Nie, SM .
NATURE BIOTECHNOLOGY, 2004, 22 (08) :969-976