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- W2002285911 abstract "J-aggregation of an achiral hydrophobic porphyrin, 5,10,15,20-tetraphenylporphyrin (H2TPP), at a toluene–4 M sulfuric acid interface was studied by a centrifugal liquid membrane–circular dichroism (CLM-CD) method. It was found for the first time that the exciton chirality sign of the interfacial J-aggregate of H4TPP2+ was affected by the rotational direction of the cylindrical CLM cell: a negative sign for clockwise (CW) rotation and a positive sign for anticlockwise (ACW) rotation. The sign of the measured optical chirality also depended on the injection position of the H2TPP stock solution in the rotating cell. Furthermore, it was observed that the rotational linear velocity of the aqueous phase was faster than that of the toluene phase, when the CLM cell was rotated at 7000 rpm. The effects of rotational direction and sample injection position on the optical chirality were overcome by the effect of chiral counter-ions such as (+)- or (−)-camphorsulfonic anions. From the observed results, a possible mechanism for the generation of the optical chirality of the interfacial J-aggregate was proposed taking into account an interfacial shear force and the spreading direction of H2TPP in the toluene phase." @default.
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- W2002285911 date "2007-08-13" @default.
- W2002285911 modified "2023-10-17" @default.
- W2002285911 title "Optical chirality of protonated tetraphenylporphyrin J-aggregate formed at the liquid–liquid interface in a centrifugal liquid membrane cell" @default.
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- W2002285911 doi "https://doi.org/10.1088/0953-8984/19/37/375105" @default.
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