Synthesis and characterization of monodisperse metalloporphyrin nanospheres
- PDF / 1,173,789 Bytes
- 6 Pages / 584.957 x 782.986 pts Page_size
- 53 Downloads / 261 Views
Uniform monodisperse nanospheres of tetra-kis(4-methoxylphenyl) porphynatemanganese (III) chloride [MnIII(TMOPP)Cl] of about 200 nm have been synthesized through a facile surfactant-assisted reprecipitation method at room temperature. Scanning electron microscopy, transmission electron microscope, infrared spectrum, ultraviolet–visible spectrum, and elemental analysis were adopted to characterize the as-prepared metalloporphyrin nanostructures. The influence factors in the reaction to the sizes and morphologies of porphyrin nanoparticles were discussed. The sizes of porphyrin nanoparticles were affected mainly by the porphyrin concentration and only monodisperse nanoshperes with high uniformity in sizes and shapes can selfassemble to form order two-dimensional superstructures. I. INTRODUCTION
Monodisperse micro/nanospheres are ideal building blocks to fabricate/design novel structural sensitive materials. The controlled synthesis and orderly assembly of monodisperse micron/nanospheres has been a realm of active interest.1–4 Among them, new strategy exploration to these nanostructures are especially of great interest for synthetic chemists.5–7 Until now, a large number of ingenious schemes have been developed for the monodisperse nanospheres, such as hydrothermal synthesis, surfactantassisted synthesis, template synthesis, and hydrolysis of metal alkoxides.8–12 It is worth noting that these procedures are often involved in restricted experimental conditions, and the goal products are mainly within the confines of inorganic compounds, such as oxides, sulfides, noble metals, etc. Compared with inorganic materials, organic compounds can offer more chemical structural variety and property tenability. Currently, nanostructures of organic materials of the desired quality have already attracted research activities and applications in molecular electronics and optoelectronic devices.13,14 Thus, to design novel synthetic routes for organic nanostructures with designable function groups and properties will be a promising area in chemical synthesis research. Porphyrins are a class of organic molecules with a macrocyclic tetrapyrrole and different substituent groups, which have remarkable photo-, catalytic-, electro-, and biochemical properties.15 They have been regarded as favorite building blocks of supramolecular assemblies because the intimate packing of the aromatic macrocycles can result in enormous photophysical and photochemical Address all correspondence to this author. e-mail: [email protected] DOI: 10.1557/JMR.2009.0448
http://journals.cambridge.org
II. EXPERIMENTAL A. Materials
The compound tetra-kis(4-methoxylphenyl)porphyrin (H2TMOPP), Fig. 1(a), was prepared according to published procedure.24 Pyrrole was distilled beforehand to
a)
3510
properties, which have found applications in catalysis, photochemistry, sensing, and optical devices. Many interesting nanometer-sized two-dimensional (2D) and threedimensional (3D) architectures of porphyrins have been constructed and studied.16–18 To date, although porphyrin
Data Loading...
