Novel Nanohybrids Based on Supramolecular Assemblies of Meso-tetrakis-(4-sulfonatophenyl) Porphyrin J-aggregates and Amine-Functionalized Carbon Nanotubes

被引:14
作者
Trapani, Mariachiara [1 ]
Mazzaglia, Antonino [1 ]
Piperno, Anna [2 ,3 ]
Cordaro, Annalaura [1 ,2 ]
Zagami, Roberto [1 ]
Castriciano, Maria Angela [1 ]
Romeo, Andrea [1 ,2 ,4 ]
Scolaro, Luigi Monsit [1 ,2 ,4 ]
机构
[1] CNR ISMN, Ist Studio Mat Nanostrutturati, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy
[2] Univ Messina, Dipartimento Sci Chim Biol Farmaceut & Ambientali, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy
[3] Univ Messina, Consorzio Interuniv Nazl Ric Metodol & Proc Innov, CINMPIS, Unita Operat, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy
[4] Univ Messina, Consorzio Interuniv Ric Chim Metalli Sistemi Biol, Unita Operat, Vle F Stagno DAlcontres 31, I-98166 Messina, Italy
关键词
porphyrin; J-aggregates; carbon nanotubes; nanohybrids; NONCOVALENT FUNCTIONALIZATION; NANO-ASSEMBLIES; FLUORESCENCE; SCATTERING; CHIRALITY; DYE; NANOPARTICLES; CYCLODEXTRIN; ENHANCEMENT; WATER;
D O I
10.3390/nano10040669
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The ability of multiwalled carbon nanotubes (MWCNTs) covalently functionalized with polyamine chains of different length (ethylenediamine, EDA and tetraethylenepentamine, EPA) to induce the J-aggregation of meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) was investigated in different experimental conditions. Under mild acidic conditions, protonated amino groups allow for the assembly by electrostatic interaction with the diacid form of TPPS, leading to hybrid nanomaterials. The presence of only one pendant amino group for a chain in EDA does not lead to any aggregation, whereas EPA (with four amine groups for chain) is effective in inducing J-aggregation using different mixing protocols. These nanohybrids have been characterized through UV/Vis extinction, fluorescence emission, resonance light scattering and circular dichroism spectroscopy. Their morphology and chemical composition have been elucidated through transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). TEM and STEM analysis evidence single or bundles of MWCNTs in contact with TPPS J-aggregates nanotubes. The nanohybrids are quite stable for days, even in aqueous solutions mimicking physiological medium (NaCl 0.15 M). This property, together with their peculiar optical features in the therapeutic window of visible spectrum, make them potentially useful for biomedical applications.
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页数:14
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