Porphyrins are a group of tetrapyrrole pigments. Physical and chemical properties of porphyrins are often related to their compositions and structures. We conducted 1H solution NMR and UV-visible spectral analysis to characterize the structural feature of a water-soluble, synthetic porphyrin i.e. tetrakis (p-sulfonatophenyl) porphyrin, TPPS4, and its interaction with different metal ions in aqu...

A liquid obeys isochronal superposition if its dynamics is invariant along the isochrones in the thermodynamic phase diagram (the curves of constant relaxation time). This paper introduces two quantitative measures of isochronal superposition. The measures are used to test the following six liquids for isochronal superposition: 1,2,6 hexanetriol, glycerol, polyphenyl ether, diethyl phthalate, t...

Abstract To increase the light collection efficiency of a liquid Ar (LAr) detector, we optimized evaporation technique tetraphenyl butadiene (TPB) on detector surface and tested operability silicon photomultiplier (SiPM), namely, multi-pixel photon counter with through-silicon-via (TSV–MPPC, Hamamatsu Photonics K.K.) at LAr temperature. TPB converts scintillations (vacuum ultraviolet light) to ...