Surfactant-Assisted Porphyrin Based Hierarchical Nano/Micro Assemblies and Their Efficient Photocatalytic Behavior

Abstract

In this report, we have demonstrated the synthesis of surfactant-assisted different morphologies of meso-tetra(4-carboxyphenyl)porphyrin assemblies (spherical to flower shaped). These nano/micro assemblies are well characterized by scanning electron microscopy and X-ray diffraction. The formation of assemblies is driven by noncovalent interactions such as hydrophobic-hydrophobic and aromatic π-π stacking between the molecules. The steady state and time-resolved spectroscopic investigation reveal that different assemblies are formed by virtue of special supramolecular organizations. The photocatalytic activities of different assemblies have been demonstrated with an organic pollutant Rhodamine B dye under the visible light irradiation. Such porphyrin based assemblies could pave the way for designing new optical based materials for the applications in photocatalytic, photovoltaic, and light harvesting system.

Aggregation behavior of tetraphenylporphyrin in aqueous surfactant solutions: Chiral premicellar J-aggregate formation

“…Among the above mentioned supramolecular assemblies highly ordered edge-to-edge J-aggregates and related porphyrin-based hybrid ionic associates possess perhaps the most useful photophysical properties [7,8]. The latter can be easily obtained as a result of the interaction between the charged porphyrin molecules and the oppositely charged polyelectrolytes [9][10][11][12][13] or ionic surfactants [14][15][16][17][18], leading to the macrocycle charge neutralization accompanied by their self-assembly into regular ladder-type J-aggregates. Similar processes have been studied in details for a number of water-soluble meso-substituted 5,10,15,20-tetraphenylporphyrin (TPP) derivatives [19][20][21], as well as for a single hydrophobic porphyrin in a neutral premicellar anionic surfactant solution [22].…”

Arginine-Mediated Self-Assembly of Porphyrin on Graphene: A Photocatalyst for Degradation of Dyes

“…However, the XRD pattern of GNPs@TCPP nanofibers (red line) shows several characteristic diffraction peaks of both graphene and TCPP aggregates, while a strong peak at around 26 • and a weak peak at 55 • are assigned to the graphitic nature of graphene, and other weak diffractions peaks are indexed for TCPP nanofibers. These results indicate that assembled TCPP aggregates are crystalline in nature, which may be due to aromatic π-π stacking between the porphyrin molecules [25]. Fourier transform infrared (FTIR) and Raman spectra of monomeric TCPP and GNPs@TCPP nanofibers also reveal characteristic bands for both GNPs and porphyrin components ( Figures S3 and S4) [45].…”

“…TCPP porphyrin aggregates have been demonstrated to have photocatalytic properties in many biological energy transduction processes in plants and algae [46,47]. It has also been confirmed that TCPP aggregates only exhibit photocatalytic properties under visible light [25,27,48]. Thus, in this work, we assess the photocatalytic degradation of Rhodamine B (RhB) and methyl orange (MO) dyes by using GNPs@TCPP nanofibers as a photocatalyst in comparison with GNPs and free-standing TCPP aggregates.…”

“…Many well-defined and controlled nanostructures such as nanoprisms, nanotubes, nanofibre bundles, nanorods, nanosheets, nanospheres, nanoclovers, nanowires and nanoparticles have thus been reported [14,16,[18][19][20][21][22]. Recently; visible-light photocatalytic applications of self-assembled porphyrin nanostructures have been extensively reported [23][24][25]. Zhong and colleagues reported the dependence of photocatalytic performance on various hierarchically structured porphyrin nanocrystals such as nanosheets, octahedrons and microspheres [26].…”

Thermodynamic study of the interaction between 5,10,15,20-tetrakis-(N-methyl-4-pyridyl)porphyrin tetraiodine and sodium dodecyl sulfate

“…Among a wide variety of assembly strategies [10], surfactant-assisted self-assembly has received a considerable attention [11]. By taking into account that aggregation of porphyrins, in the presence of surfactants, can be driven by non-covalent interactions, such as hydrophobic-hydrophobic, π-π stacking between the molecules [12], or by electrostatic ones [13], it can be possible to manage to produce micro-or nano-structures with different supramolecular organizations, different sizes and shapes [10,14,15], allowing the designing of new optical materials for photocatalytic [16], photovoltaic [17] and light harvesting [12] system applications.…”