Acid-induced improvement of photosensitizing efficiency of porphyrins under heterogeneous aqueous conditions: High photosensitizing activity, dissociative stability and photooxidative durability

Periodate-Mediated Aerobic Oxidation of Sulfides over a Bifunctional Porphyrin-polyoxometalate Catalyst: Photosensitized Singlet Oxygen Oxidation of Iodate to Periodate

“…It is noteworthy that the Soret band of the immobilized porphyrin appeared at 440 nm which is red-shifted with respect to that of the free-base porphyrin in water. Due to the redshift of the Soret band of H 2 TMPyP upon diprotonation in aqueous solutions and solid state, ,, the NaOH test was used to ensure the absence of porphyrin diacid in the composite. Furthermore, the protonation of porphyrins is accompanied with the decrease of the Q bands from 4–5 to a single band with a shoulder at the shorter wavelength side (Figure S2).…”

“…Details of instruments used for the preparation of the UV–vis (solution and solid state), 1 H and 13 C NMR, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and energy-dispersive X-ray spectra, field-emission scanning electron microscopy (FESEM) images, porosimetry measurements, thermal gravimetric analysis, and GC analysis were presented elsewhere. − …”

Photooxidation of organic compounds by mesoporous silica functionalized with rose bengal

“…19,20 Regarding reactions photosensitized by organic molecules (such as xanthenes), catalytic heterogenization facilitates the purification of products and the reuse of photocatalysts. [21][22][23] In this sense, the use of mesoporous silica obtained from rice husks is an economical and environmentally friendly approach. Additionally, the functionalization of silica supports with xanthenes is a promising strategy for the generation of reactive oxygen species (singlet oxygen and radical species) 24,25 capable of oxidizing organic molecules without the use of toxic and polluting reagents, generating less waste in a sustainable approach.…”

“…Photosensitization reactions generate two main types of oxidative species, the hydroxyl radical ( ● OH) and singlet oxygen ( 1 O 2 ) 19,20 . Regarding reactions photosensitized by organic molecules (such as xanthenes), catalytic heterogenization facilitates the purification of products and the reuse of photocatalysts 21–23 . In this sense, the use of mesoporous silica obtained from rice husks is an economical and environmentally friendly approach.…”

Rigid-Flexible Binuclear Catalysts: Boosting Activity for Copolymerization of CO2 and Propylene Oxide

“…PO at room temperature, a rapid color change from dark green to purple-red was observed, indicating that Cldissociates from the Al center for the nucleophilic attack on PO, because of the change of Lewis acidity of aluminum porphyrin. [9] As shown in Figure 6b, the ring-opening products of Clnucleophilic attack on PO were identified as 1chloro-2-propanol (72%) and 2-chloro-1-propanol (28%), respectively, indicating that ringopening position is more likely to occur in methylene carbon rather than methyne carbon. [10] Moreover, the regio-selectivity of Nap-Al 2 at the methyne carbon is 1.7 times higher than that of m-Al (Figure S74), possibly as a result of the mutual adaptation when the PO enters the confined space of Nap-Al 2 , as m-Al and Nap-Al 2 have similar Lewis acidity of Al center (Figure S75).…”