Measurements of pKa of organic molecules using third-order nonlinear optics

被引：16

作者：

de Araujo, RE ^{[1
]}

Gomes, ASL ^{[1
]}

de Araújo, CB ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 330卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(00)01108-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the use of the Z-scan method, which is a nonlinear optical technique, as a general method to determine a chemical parameter, the pK(a), which characterizes the equilibrium constant in acid-base reactions. The measurements were performed with picosecond pulses at 532 nm in aqueous solution of methyl orange, C14H14N3O3S- The experimental results agree well with a phenomenological description of the molecule nonlinearity as well as with the results predicted using the Henderson-Hasselbalch equation. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：347 / 353

页数：7

共 20 条

[1] Exploitation of the Z-scan technique as a method to optically probe pKa in organic materials:: application to porphyrin derivatives [J].

Bezerra, AG ;

Borissevitch, IE ;

Gomes, ASL ;

de Araújo, CB .

OPTICS LETTERS, 2000, 25 (05) :323-325

[2]

Bloembergen N., 1965, NONLINEAR OPTICS

[3]

BORISSEVITCH I, IN PRESS EFFECTS PH

[4]

BUDAVARI S, 1989, CHEM SCI DATA TABLES

[5] THERMAL LENSING RESULTING FROM ONE-PHOTON AND 2-PHOTON ABSORPTION STUDIED WITH A 2-COLOR TIME-RESOLVED Z SCAN [J].

CASTILLO, J ;

KOZICH, VP ;

MARCANO, A .

OPTICS LETTERS, 1994, 19 (03) :171-173

[6] All-optical beam deflection induced by cross-phase modulation in bacteriorhodopsin [J].

de Araujo, RE ;

Borissevitch, G ;

Gomes, ASL .

ELECTRONICS LETTERS, 2000, 36 (01) :71-73

[7]

Devlin T.M., 1997, TXB BIOCH CLIN CORRE

[8] MEASUREMENTS OF NONDEGENERATE OPTICAL NONLINEARITY USING A 2-COLOR SINGLE BEAM METHOD [J].

MA, H ;

GOMES, ASL ;

DEARAUJO, CB .

APPLIED PHYSICS LETTERS, 1991, 59 (21) :2666-2668

[9] Sensitivity-enhanced reflection Z-scan by oblique incidence of a polarized beam [J].

Martinelli, M ;

Bian, S ;

Leite, JR ;

Horowicz, RJ .

APPLIED PHYSICS LETTERS, 1998, 72 (12) :1427-1429

[10] Reflection of a Gaussian beam from a saturable absorber [J].

Petrov, DV ;

Gomes, ASL ;

deAraujo, CB .

OPTICS COMMUNICATIONS, 1996, 123 (4-6) :637-641

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