Measurement of circular dichroism spectra of liquid/liquid interface by centrifugal liquid membrane method.

The direct measurement of the circular dichroism (CD) spectra of liquid/liquid interface has been achieved for the first time by the centrifugal liquid membrane (CLM) method combined with a conventional CD spectropolarimetry. In the sample chamber of the CD spectropolarimeter, a cylindrical glass cell containing small amounts of organic and aqueous phases was rotated at ca. 7000 rpm to generate a two-phase liquid membrane with a high specific interfacial area. The CD spectra of the J-aggregate of protonated 5,10,15,20-tetraphenylporphyrin formed at the toluene/sulfuric acid interface in the rotating cell have been measured. The results demonstrated the novelty and advantages of this method.

[1]  H. Watarai,et al.  Non-linear optical activity of porphyrin aggregate at the liquid/liquid interface , 2004 .

[2]  H. Watarai,et al.  Interfacial nanochemistry in liquid-liquid extraction systems , 2003 .

[3]  H. Watarai,et al.  In Situ Measurement of Aggregate Formation Kinetics of Nickel(II)-Pyridylazoaminophenol Complex at the Heptane-Water Interface by Centrifugal Liquid Membrane Spectrophotometry , 2003 .

[4]  F. Sagués,et al.  Chiral shape and enantioselective growth of colloidal particles of self-assembled meso-tetra(phenyl and 4-sulfonatophenyl)porphyrins , 2003 .

[5]  M. Liu,et al.  Fabrication of Chiral Langmuir−Schaefer Films from Achiral TPPS and Amphiphiles through the Adsorption at the Air/Water Interface , 2003 .

[6]  N. Periasamy,et al.  Self-Assembly of Template-Directed J-Aggregates of Porphyrin , 2003 .

[7]  H. Watarai,et al.  Azo-Imine Resonance in Palladium(II)−Pyridylazo Complex Adsorbed at Liquid−Liquid Interfaces Studied by Centrifugal Liquid Membrane-Resonance Raman Microprobe Spectroscopy , 2002 .

[8]  H. Watarai,et al.  Resonance Raman Spectroscopic Detection of Pyridylazo Complex Formed at Liquid-Liquid Interface in Centrifugal Liquid Membrane System. , 2001 .

[9]  F. Sagués,et al.  Chiral Sign Induction by Vortices During the Formation of Mesophases in Stirred Solutions , 2001, Science.

[10]  X. Huang,et al.  Porphyrins and metalloporphyrins: versatile circular dichroic reporter groups for structural studies. , 2000, Chirality.

[11]  H. Watarai,et al.  Heterogeneous Fluorescence Quenching Reaction between (5,10,15,20-Tetraphenylporphyrinato)zinc(II) and Methylviologen at Dodecane-Water Interface. , 1999 .

[12]  H. Watarai,et al.  Direct Spectrophotometric Measurement of Demetalation Kinetics of 5,10,15,20-Tetraphenylporphyrinatozinc(II) at the Liquid−Liquid Interface by a Centrifugal Liquid Membrane Method , 1998 .

[13]  H. Watarai,et al.  Measurement of External Reflection Spectra of Protonated Tetraphenylporphyrin Adsorbed at Liquid-Liquid Interface , 1998 .

[14]  N. Maiti,et al.  J- and H-aggregates of porphyrin-surfactant complexes: time-resolved fluorescence and other spectroscopic studies , 1998 .

[15]  D. Akins,et al.  Absorption and Raman Scattering by Aggregated meso-Tetrakis(p-sulfonatophenyl)porphine , 1994 .

[16]  H. Watarai,et al.  Simple Devices for the Measurements of Absorption Spectra at Liquid-Liquid Interfaces , 1994 .

[17]  Y. Kaizu,et al.  J‐aggregate formation of a water‐soluble porphyrin in acidic aqueous media , 1993 .