ATR-IR spectroscopy for the investigation of solution reaction kinetics: Hydrolysis of trimethyl phosphate

被引：17

作者：

Bayada, A ^{[1
]}

Lawrance, GA ^{[1
]}

Maeder, M ^{[1
]}

Molloy, KJ ^{[1
]}

机构：

[1] UNIV NEWCASTLE,DEPT CHEM,CALLAGHAN,NSW 2308,AUSTRALIA

来源：

APPLIED SPECTROSCOPY | 1995年 / 49卷 / 12期

关键词：

ATR-IR spectroscopy; multivariate nonlinear least-squares; trimethylphosphate; spectral series; reaction kinetics; factor analysis;

D O I：

10.1366/0003702953965902

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

ATR-IR spectroscopy is proposed as a versatile technique for the investigation of reaction kinetics in solution, particularly in aqueous solution. Subtraction of the solvent spectrum and thus quantitative absorption measurements are possible. In contrast to thin-film transmission spectroscopy, thermostatting is feasible. The high information content of IR spectra demands high-resolution spectra measured at many wavenumbers, and, for kinetic investigations, series of spectra are measured. A multivariate nonlinear least-squares fit is proposed that effectively overcomes the difficulties related to large numbers of data and parameters. As a test for the method, the base-catalyzed hydrolysis of trimethyl phosphate in aqueous solution was investigated. The rate constant is 1.6 x 10(-4) s(-1) at 40 degrees C and pH 13.

引用

页码：1789 / 1792

页数：4

共 26 条

[1]

[Anonymous], 1969, DATA REDUCTION ERROR

[2] REACTIONS OF ORGANIC PHOSPHATES .5. HYDROLYSIS OF TRIPHENYL AND TRIMETHYL PHOSPHATES [J].