Photochemical Transformations Involving Porphyrins and Phthalocyanines

Sergeeva, Natalia N.; Senge, Ma­thias O.

doi:10.1201/b12252-35

Cited by 13 publications

(8 citation statements)

References 313 publications

(257 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The combination of titania particles and dye is often used for the degradation of organic materials. In general, porphyrins are highly photostable, but at high temperatures, the dye itself is expected to undergo photo-oxidation due to coexistence with titania particles [25].…”

Section: Thermal and Photostabilitymentioning

confidence: 99%

Characterization and Improvement of Heat Resistance of a Polymer-Ceramic Pressure-Sensitive Paint at High Temperatures

Furuya

Nakai

Imai

et al. 2021

Sensors

View full text Add to dashboard Cite

Degradation of fast response pressure-sensitive paints (PSP) above room temperature is a serious problem for PSP measurements in high-temperature environments. A standard polymer-ceramic PSP (PC-PSP) composed of platinum(II)-5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorphenyl)-porphyrin (PtTFPP), titania particles and poly(isobutyl methacrylate) (polyIBM) was characterized to elucidate the degradation mechanism. Applying a two-gate lifetime-based method, the PC-PSP has sufficient pressure and temperature sensitivities even at 100 °C, while the luminescence intensity significantly decreases during the test. Subsequent measurements on thermal and photostability as well as luminescence spectra reveal that the main cause of the degradation is the photodegradation of PtTFPP due to direct exposure of the dye molecules to the atmosphere. In order to suppress such degradation, a small amount of urethane resin is added to the dye solution as a simple additional step in the preparation of PC-PSP. The addition of the urethane resin significantly reduces the degradation of the PSP, although its time response is slightly slower than that of the standard PC-PSP.

show abstract

Section: Thermal and Photostabilitymentioning

confidence: 99%

Characterization and Improvement of Heat Resistance of a Polymer-Ceramic Pressure-Sensitive Paint at High Temperatures

Furuya

Nakai

Imai

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…Because of their fascinating physical and bio‐chemical properties, porphyrins and metalloporphyrins have attracted researchers from many different areas of study . Inspired from the natural role of chlorophylls, people have studied many different types of porphyrins and metalloporphyrins to mimic the natural process of photosynthesis . Strong optical strength, nonlinear optical behavior, high polarizability, and thermal stabilities of the porphyrins and metalloporphyrins make them ideal candidates for ultrafast switching technology .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Novel Symmetric Porphyrin Schiff Base Dimers by Solid–Liquid Reaction Methodology

Yaseen

Farooq

Mahmood

et al. 2019

Journal of Heterocyclic Chem

View full text Add to dashboard Cite

A new convenient solid–liquid condensation reaction procedure for the synthesis of novel asymmetric and symmetric meso‐tetraarylporphyrin and metalloporphyrin Schiff bases is reported. The condensation reaction between β‐formyl porphyrin or metalloporphyrins and aromatic amines was carried out at solid–liquid interface by using neutral alumina powder as a solid support for β‐formyl porphyrin or metalloporphyrins and absolute ethanol as the carrier solvent for aromatic amines. Six different asymmetric porphyrin/metalloporphyrin Schiff bases were synthesized via solid–liquid interface reaction methodology. The same solid–liquid synthetic methodology was applied for the synthesis of six novel symmetric Schiff base porphyrin/metalloporphyrin dimers. The comparison of UV–visible spectra of porphyrin Schiff base monomers and dimers revealed that some degree of electronic perturbation has occurred upon dimerization as the Soret bands of the monomers underwent peak broadening along with red shifts. Column chromatography and crystallization were used to purify the compounds. Fourier transform infrared, UV–visible, elemental analysis, 1H NMR, and mass spectrometry were used to characterize the newly synthesized compounds.

show abstract

“…Importantly, the NIR features the majority of the sunlight intensity, so their optical properties make the phthalocyanines inevitable donor participants in photovoltaics. On the other hand, Pcs have emerged as excellent light harvesting antennas for their incorporation into donor-acceptor systems, mainly in connection with carbon nanostructures as acceptor moieties [7][8][9][10]. Lastly, the electronic properties of phthalocyanines can be fine-tuned by synthetic modification, which can be performed by functionalizing their peripheral positions, replacing the central metal ion and/or providing these metallorganic dyes with axial ligands [11].…”

Section: Introductionmentioning

confidence: 99%

Ti(IV) phthalocyanines for dye sensitized solar cells

Rodríguez‐Morgade

Pellejà

Torres

et al. 2013

J. Porphyrins Phthalocyanines

View full text Add to dashboard Cite

Ti(IV) phthalocyanines axially coordinated to 2,3-and 1,8-naphthalenediols have been prepared and characterized. The naphthalene axial ligands have been endowed with none, one or two sulfonate anchoring groups in order to study the performance of the dyes as DSC photosensitizers. All studied compounds showed the same efficiency. The unexpected results suggest displacement of the axial ligand with concomitant formation of a di-m-oxotitanium-type anchoring moiety between the hydroxylated TiO 2 surface and the Ti-phthalocyanine. This is probably the reason why the type of axial ligand does not play any role on the overall device efficiency. The titanium phthalocyanine absorbed in this way shows state selective electron injection were only those photons absorbed by the Soret band are capable to inject electrons into the TiO 2 , while photons absorbed by the Q-band result in negligible photocurrent. This fact could explain the low efficiency of the Ti-phthalocyanines.

show abstract

Photochemical Transformations Involving Porphyrins and Phthalocyanines

Cited by 13 publications

References 313 publications

Characterization and Improvement of Heat Resistance of a Polymer-Ceramic Pressure-Sensitive Paint at High Temperatures

Characterization and Improvement of Heat Resistance of a Polymer-Ceramic Pressure-Sensitive Paint at High Temperatures

Synthesis of Novel Symmetric Porphyrin Schiff Base Dimers by Solid–Liquid Reaction Methodology

Ti(IV) phthalocyanines for dye sensitized solar cells

Contact Info

Product

Resources

About