Generalized Two-Dimensional Correlation Method Applicable to Infrared, Raman, and other Types of Spectroscopy

Applied Spectroscopy - Tập 47 Số 9 - Trang 1329-1336 - 1993
Isao Noda1
1The Procter and Gamble Company, Miami Valley Laboratories, P.O. Box 398707, Cincinnati, Ohio 45239-8707

Tóm tắt

A two-dimensional (2D) correlation method generally applicable to various types of spectroscopy, including IR and Raman spectroscopy, is introduced. In the proposed 2D correlation scheme, an external perturbation is applied to a system while being monitored by an electromagnetic probe. With the application of a correlation analysis to spectral intensity fluctuations induced by the perturbation, new types of spectra defined by two independent spectral variable axes are obtained. Such two-dimensional correlation spectra emphasize spectral features not readily observable in conventional one-dimensional spectra. While a similar 2D correlation formalism has already been developed in the past for analysis of simple sinusoidally varying IR signals, the newly proposed formalism is designed to handle signals fluctuating as an arbitrary function of time, or any other physical variable. This development makes the 2D correlation approach a universal spectroscopic tool, generally applicable to a very wide range of applications. The basic property of 2D correlation spectra obtained by the new method is described first, and several spectral data sets are analyzed by the proposed scheme to demonstrate the utility of generalized 2D correlation spectra. Potential applications of this 2D correlation approach are then explored.

Từ khóa


Tài liệu tham khảo

Noda I., 1986, Bull. Am. Phys. Soc., 31, 520

10.1063/1.432450

Nagayama K., 1980, J. Magn. Reson., 40, 321

Bax A., 1982, Two Dimensional Nuclear Magnetic Resonance in Liquids

10.1002/anie.198303501

10.1016/0079-6565(85)80011-X

10.1021/ja00203a008

10.1366/0003702904087398

Noda I., 1990, Chemtracts-Macromol. Chem., 1, 89

10.1007/BF01205847

Palmer R. A., 1989, SPIE, 1145, 277

Noda I., 1990, Polym. Prepr., 31, 576

10.1002/adma.19910031210

10.1366/0003702914337803

10.1016/0003-2670(91)85067-3

10.1016/0009-2614(91)87092-P

10.1007/978-3-642-84771-4_98

10.1016/B978-0-444-89397-0.50010-5

10.1016/B978-0-444-89397-0.50011-7

10.1366/0003702934067595

10.1366/0003702934067405

10.1002/9780470316429

Brillinger D. R., 1975, Time Series Data Analysis and Theory

Jennison R. C., 1961, Fourier Transforms and Convolutions for the Experimentalist

10.1366/0003702924125375

10.1126/science.246.4933.1029

Brown Hanbury R., 1974, The Intensity Interferometry

Thông tin
Thông tin xuất bản

Applied Spectroscopy

Tập 47 Số 9

1329-1336

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