Nonionic omnisoluble photosensitizer reference material for the estimation of singlet oxygen quantum yield

Abstract

Meso-tetrakis-(3,4,5-tris{2-[2-(2-methoxyethoxy)ethoxy]ethoxy}phenyl)porphyrin TEG12PH2 is reported as an ‘omnisoluble’ reference for singlet oxygen (1O2) generation quantum yield (ΦSO) estimation. TEG12PH2 is a highly soluble, nonionic compound possessing excellent 1O2 QY in a...

Rich or poor: the impact of electron donation and withdrawal on the photophysical and photocatalytic properties of copper(i) complexes

“…52,53 Hence, the catalytic generation of 1 O 2 can be accessed by measuring the NIR emission of 1 O 2 in reference to phenalenone as a universal standard. 85–89 From previous studies on related copper compounds, it is known that the singlet oxygen quantum yield in acetonitrile is usually comparatively low, 45,46 which is also the case here. The values were therefore determined in dichloromethane instead (see Table 3).…”

Employing Singlet Fission into Boosting the Generation of Singlet Oxygen and Superoxide Radicals for Photooxidation Reactions

“…71 Then, the 1 O 2 yield (Φ Δ ) of the dimer was calculated to be ∼125 and ∼140% in air-and oxygen-saturated toluene, respectively, by comparing the corresponding 1 O 2 emission intensity of the dimer with that produced by the benchmark tetraphenylporphyrin (TPP, Φ Δ = 69% in toluene). 72,73 We also measured the 1 O 2 emission in degassed, air-or oxygen-saturated CHCl 3 (Figure S9) and calculated the 1 O 2 yield (Φ Δ ) of the dimer to be ∼133 and ∼148% in air-and oxygen-saturated CHCl 3 , respectively (TPP, Φ Δ = 55% in CHCl 3 ). Additionally, the 1 O 2 generation is also confirmed by the fast degradation of the 1 O 2 scavenger 1,3-diphenylisobenzofuran (DPBF) in the presence of the dimer (Figure 2B,D).…”

How the Way a Naphthalimide Unit is Implemented Affects the Photophysical and -catalytic Properties of Cu(I) Photosensitizers

“…To test the 1 O 2 productivity, the emission quantum yield of 1 O 2 can be observed at about 1276 nm (Schmid et al, 2022;Chettri et al, 2021). For this purpose, phenalenone (PN) is a universal reference compound which can be used in various solvents (Flors and Nonell, 2006;Silva et al, 2013;Trivella et al, 2014;Godard et al, 2020;Kaye et al, 2021;Payne et al, 2022). As expected, the much longer triplet state lifetime of Cubiipo in CH 2 Cl 2 greatly enhances the generation of 1 O 2 with singlet oxygen quantum yields of 0.98 with respect to PN (QY PN (CH 2 Cl 2 ) = 0.98).…”