Photophysical investigations on supramolecular fullerene/phthalocyanine charge transfer interactions in solution

Ray, Aniruddha; Pal, Haridas; Bhattacharya, Sumanta

doi:10.1016/j.saa.2013.08.107

Cited by 25 publications

(7 citation statements)

References 67 publications

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“…In the visible spectral range a decrease and a red‐shift of the Q band was observed when the phthalocyanines were subjected to complexation with 9 . These observations have been previously assigned to charge‐transfer interactions ,. Among these complexes the one with the cobalt porphyrin was found to exhibit the strongest interaction between the investigated ligand.…”

Section: Resultsmentioning

confidence: 53%

“…In addition, the LUMO levels of suitably functionalized fullerenes can be adjusted to be between the LUMO of the porphyrins/phthalocyanines and the CB of TiO 2 . Although the photophysics of porphyrin/phthalocyanine‐fullerene complexes, and their application in solar cells,, have been studied, these conjugates have not been applied in photocatalytic systems with TiO 2 . Therefore, we decided to explore this possibility using a new anchoring compound, namely bis (4‐pyridyl) pyrrolidinofullerene ( 9 ).…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Photocatalytic Performance of Porphyrin/Phthalocyanine and Bis(4‐pyridyl)pyrrolidinofullerene modified Titania

et al. 2017

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Zinc(II), copper(II) and cobalt(II) metallated porphyrins/phthalocyanines and bis(4-pyridyl) pyrrolidinofullerene (9) were used in a supramolecular approach for the sensitization of titania. Spectral properties of the chromophores were examined in the solid state showing strong absorptions at 700 and 800 nm for porphyrins and phthalocyanines, respectively. The interaction between the chromophores and a dual ligand was investigated spectroscopically. Titania-based composites sensitized with 9 and cobaltous porphyrin exhibited the highest photocatalytic activity against both phenol and methylene blue under solar irradiation. Photodegradation intermediates were determined based on LC-UV-Vis-MS analysis. It is expected that the composites will be applied for remediation of aqueous environmental samples from transparent and colorful pollutants.[a] Dr.

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Section: Resultsmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Performance of Porphyrin/Phthalocyanine and Bis(4‐pyridyl)pyrrolidinofullerene modified Titania

et al. 2017

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“…In any case, theoretical simulations were not able to predict the photoinduced charge transfer and the energy transfer appears energetically favored. Size selection in the formation of non-covalent complexes with C 60 and C 70 was achieved inserting long alkyl chains on the Pc periphery [80]. In particular, eight octyloxy groups attached to the Pc periphery (2,3,9,10,16,17,23,24-octakis(octyloxy)-29H,31H-phthalocyanine) were used to form a branched structure.…”

Section: Pcs-based Supramolecular Assemblies For Photovoltaic Applicamentioning

confidence: 99%

Applications of Photoinduced Phenomena in Supramolecularly Arranged Phthalocyanine Derivatives: A Perspective

2020

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This review focuses on the description of several examples of supramolecular assemblies of phthalocyanine derivatives differently functionalized and interfaced with diverse kinds of chemical species for photo-induced phenomena applications. In fact, the role of different substituents was investigated in order to tune peculiar aggregates formation as well as, with the same aim, the possibility to interface these derivatives with other molecular species, as electron donor and acceptor, carbon allotropes, cyclodextrins, protein cages, drugs. Phthalocyanine photo-physical features are indeed really interesting and appealing but need to be preserved and optimized. Here, we highlight that the supramolecular approach is a versatile method to build up very complex and functional architectures. Further, the possibility to minimize the organization energy and to facilitate the spontaneous assembly of the molecules, in numerous examples, has been demonstrated to be more useful and performing than the covalent approach.

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“…In order to identify and study on the charge transfer phenomenon of [60]Fullerene derivatives as the acceptor in donor-acceptor hybrids, spectroscopic techniques have been extensively used [16][17][18][19] . As a well-known donor-acceptor hybrid, [60]Fullerene-Pcs have been studied as charge transfer assemblies employing spectroscopic techniques [20][21][22][23]. Furthermore, photoactive supramolecular assemblies, in which both donor and acceptor moieties are non-covalently linked together, are principally attractive either as prototypes of the conversion of light into electric current or natural photosynthesis [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Through-space electronic communication of zinc phthalocyanine with substituted [60]Fullerene bearing O2Nxaza-crown macrocyclic ligands

Ghanbari

Shahhoseini

Mahlooji

et al. 2017

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Two new macrocyclic ligands containing 17- and 19-membered ON-donor aza-crowns anchored to [60]Fullerene were synthesized and characterized by employing HPLC, electrospray ionization mass (ESI-MS), H andC NMR, UV-vis, IR spectroscopies, as well as powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA) in solid state. TGA measurements revealed that upon linking each of these macrocycle rings to [60]Fullerene, the decomposition point measured for [60]Fullerene moiety was increased, indicating on the promoted stability of [60]Fullerene backbone during binding to these macrocyclic ligands. Moreover, the ground state non-covalent interactions of [60]Fullerene derivatives of ON (x=2, and 3) aza-crown macrocyclic ligands namely, L-L with zinc phthalocyanine (ZnPc) were also investigated by UV-vis absorption, steady state and time resolved fluorescence spectrophotometry in N-methyl-2-pyrrolidone (NMP). The calculation of Stern-Volmer constants (K) indicated on existence of an efficient quenching mechanism comprising of the excited singlet state of ZnPc in the presence of L-L. The observation of an appropriate correlation between decrease in fluorescence intensity and lifetime parameters led us to propose the occurrence of a static mechanism for the fluorescence quenching of ZnPc in the presence of L-L. The binding constants (K) of L-L/ZnPc were also determined applying the fluorescence quenching experiments. Meanwhile, the incompatibility of both K and K values found for L was also described in terms of structural features using DFT calculations using the B3LYP functional and 6-31G* basis set.

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Photophysical investigations on supramolecular fullerene/phthalocyanine charge transfer interactions in solution

Cited by 25 publications

References 67 publications

Enhanced Photocatalytic Performance of Porphyrin/Phthalocyanine and Bis(4‐pyridyl)pyrrolidinofullerene modified Titania

Enhanced Photocatalytic Performance of Porphyrin/Phthalocyanine and Bis(4‐pyridyl)pyrrolidinofullerene modified Titania

Applications of Photoinduced Phenomena in Supramolecularly Arranged Phthalocyanine Derivatives: A Perspective

Through-space electronic communication of zinc phthalocyanine with substituted [60]Fullerene bearing O2Nxaza-crown macrocyclic ligands

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