**6. References**


 

;

The application of matrix algebra to the quantitative spectrophotometry provides a unified formalism for treatment the mathematical issues. Unlike the usual mathematical approaches, the matrix description of the phenomena behind the analytical

Bosch-Reigh, F., Campins-Falco, P., Sevillano-Cabeza, A., Herraes-Hernandez, R., & Molins-

Burnius, E. (1959). Assay of Vitamin A Oils, *Journal of the American Oil Chemistry's Society*,

Ewing, D.T., Sharpe L.H., & Bird O.D. (1953). Determination of Vitamin A in Presence of Tocopherols, *Analytical Chemistry,* Vol.25, No.4, pp. 599-604, ISSN 0003-2700 Fox, S.H. & Mueller, A. (1950). The Influence of Tocopherols on U.S.P. XIV Vitamin

Garrido, M., Lázaro, I., Larrechi, M.S., & Rius F.X. (2004). Multivariate Resolution of Rank-

Legua C. (1991). Development of the H-Point Standard Addition Method for Ultraviolet-Visible Spectroscopic Kinetic Analysis of Two-component Systems,

Assay, *Journal of the American Pharmaceutical Association*, Vol.39, No.11, pp.621-

deficient Near-infrared Spectroscopy Data fron the Reaction of Curing Epoxi Resins Using the Rank Augmentation Strategy and Multivariate Curve Resolution Alternating Least Squares Approach, *Analytica Chimica Acta*, Vol.515. No.1, pp.65-

spectrophotometry promise new dimensions for the automatic processing of results.

**C**

17.819 10.290 5.307

*mol l* /

6721.72 17534.60 28741.06 5978.40 14156.50 32098.95 4390.01 10405.40 34854.40 1832.22 8685.62 35571.34 675.67 10070.25 32288.01 426.77 14575.14 26461.11 463.41 20233.58 19124.73 575.88 25871.08 12545.68

 

Vol.35, No.4, pp. 13-14

**5. Conclusions** 

**6. References** 

623

73

1045.49 29980.13 8855 **E** .66 1617.15 28153.68 7048.81 2330.58 20505.79 5443.55 3248.96 8960.11 3602.66 3540.99 2713.00 1580.26 2852.64 1204.43 613.63 1694.67 550.32 343.30 719.08 434.12 355.28 292.02 443.65 350.29 209.16 417.53 502.18

*Analytical Chemistry*, Vol.63, No.21, pp. 2424-2429


**16** 

*Russia* 

**Optical and Resonant Non-Linear** 

**of Pseudoisocyanine Derivatives** 

**in Thin Solid Films** 

**Optical Properties of J-Aggregates** 

Vladimir V. Shelkovnikov1 and Alexander I. Plekhanov2 *1Novosibirsk Institute of Organic Chemistry SB RAS, Novosibirsk, 2Institute of Automation and Electrometry SB RAS, Novosibirsk,* 

The properties of colligative states of spontaneously aggregated polymethine dyes differ substantially from those of monomeric dye. Excellent examples of such self-organized molecular ensembles are J-aggregates of cyanine dyes. The J-aggregated state is now being considered for a number of non-cyanine dyes, the cyanine dye is still the most known and effective dye for J-aggregate formation (Wurthner, 2011). J-aggregates of cyanine dyes, first discovered by Jelley and Scheibe in 1936 (Jelley, 1936; Scheibe, 1936), have been studied for many years (Kobayashi, 1996). J-aggregates of cyanine dyes attract the attention of the researchers due to their interesting optical properties. J-aggregates are characterized by a strong absorption peak (J-peak) with narrow line widths which are bathochromically shifted relative to the absorption band of the monomeric dye. Their role as photographic sensitizers can hardly be overestimated (Tani, 1996; Trosken et al., 1995; Shapiro, 1994). Aggregates of dye molecules may be used to mimic light harvesting arrays and to prepare artificial photosynthetic systems (McDermott et al., 1995; Blankenship, 1995). Another development is the efficient electroluminescence revealed in single-layer light-emitting diodes based on electron-hole conducting polymers containing nano-crystalline phases of J-aggregates of

The promise in the property of J-aggregates lies in their high non-linear cubic optical susceptibility, χ(3) ~ 10-7 esu, with a fast response time at the J-peak resonance in solutions

The pseudoisocyanine dye (PIC) is the known dye which forms the J-aggregates in solutions. Of particular interest is the formation and non-linear optical properties of Jaggregates in thin solid films. Films of J-aggregates of organic dyes are promising nanomaterials for non-linear optical switches because they have the unique properties of high non-linear bleaching and non-linear refraction (Markov et al., 2000). As shown in Glaeske et al. (2001), films of J-aggregates with bistable behaviour may be the basis for twodimensional optical switches, controllable by light. The non-linear optical properties of

**1. Introduction** 

cyanine dyes (Mal'tsev et al., 1999).

and polymer films (Wang, 1991; Bogdanov et al., 1991).

Valderrama, P., & Poppi R.J., (2009). Second Order Standard Addition Method and Fluorescence Spectroscopy in the Quantification of Ibuprofen Enantiomers in Biological Fluids, *Chemometrics and Intelligent Laboratory Systems*, Vol.106, No.2, pp. 160-165.
