856650-16-3

Upstream product

• 931-59-9 benzenesulfenyl chloride 
• 612-17-9 1,4-dihydronaphthalene 

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• 1207338-09-7 3,4-dihydro-3-(phenylsulfonyl)-naphthalene 

Relevant academic research and scientific papers

Tunable phosphorescent NIR oxygen indicators based on mixed benzo-and naphthoporphyrin complexes

A series of π-extended phosphorescent palladium(II) and platinum(II) porphyrin complexes were synthesized, in which additional benzene rings are fused radially onto at least one of the four peripheral benzo groups. The photophysical properties of the metalloporphyrins palladium(II)-meso-tetra-(4- fluorophenyl)mononaphthotribenzoporphyrin (Pd1NF), cispalladium(II)-meso-tetra- (4-fluorophenyl)dibenzodinaphthoporphyrin (Pd2NF), and palladium(II)-meso-tetra- (4-fluorophenyl)monobenzotrinaphthoporphyrin (Pd3NF) and the corresponding platinum(II) compounds (Pt1NF, cis-Pt2NF, Pt3NF) were investigated. The compounds under investigation absorb intensively in the near-infrared region (628-691 nm) and emit at room temperature at 815-882 nm. Phosphorescence quantum yields of the platinum(II) porphyrins range from 25 to 53% with luminescence decay times of 21 to 44 μs in deoxygenated toluene solutions at room temperature. The corresponding palladium(II) complexes exhibit quantum yields in the range of 7 to 18% with lifetimes of 106 to 206 μs. Density functional theory (DFT) calculations revealed nonplanar geometries for all complexes and corroborate the absorption characteristics. The subsequent π extension of the porphyrin system leads to near-infrared absorbing oxygen indicators with tailor-made luminescence properties as well as tunable oxygen sensitivity.

Molecular and morphological influences on the open circuit voltages of organic photovoltaic devices

We explore the dependence of the dark current of C60-based organic photovoltaic (OPV) cells on molecular composition and the degree of intermolecular interaction of several molecular donor materials. The saturation dark current density, JS, is an important factor in determining the open circuit voltage, Voc. The Voc values of OPVs show a strong inverse correlation with JS. Donor materials that show evidence for aggregation in their thin-film absorption spectra and polycrystallinity in thin film X-ray diffraction result in a high dark current, and thus a low Voc. In contrast, donor materials with structures that hinder intermolecular π-interaction give amorphous thin films and reduced values of JS, relative to donors with strong intermolecular π-interactions, leading to a high Voc. This work provides guidance for the design of materials and device architectures that maximize OPV cell power conversion efficiency.

Synthesis of symmetrical tetraaryltetranaphtho[2,3]porphyrins

A new method of synthesis of meso-tetraaryltetranaphtho[2,3]porphyrins (Ar4TNP) has been developed. Ar4TNPs with peripheral functional groups are obtained by oxidative aromatization of meso-tetraarylporphyrins in which pyrrole units