Thermodynamic Study of Colorimetric Transitions in Polydiacetylene Vesicles Induced by the Solvent Effect

被引：40

作者：

Pires, Ana Clarissa S. ^{[1
]}

Soares, Nilda de Fatima F. ^{[1
]}

da Silva, Luis Henrique M. ^{[2
]}

Hespanhol da Silva, Maria C. ^{[2
]}

Mageste, Aparecida B. ^{[2
]}

Soares, Remili F. ^{[1
]}

Teixeira, Alvaro V. N. C. ^{[3
]}

Andrade, Nelio J. ^{[1
]}

机构：

[1] Univ Fed Vicosa, Ctr Ciencias Exatas & Tecnol, Dept Tecnol Alimentos, BR-36570000 Vicosa, MG, Brazil

[2] Univ Fed Vicosa, Ctr Ciencias Exatas & Tecnol, Dept Quim, BR-36570000 Vicosa, MG, Brazil

[3] Univ Fed Vicosa, Ctr Ciencias Exatas & Tecnol, Dept Fis, BR-36570000 Vicosa, MG, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2010年 / 114卷 / 42期

关键词：

INDUCED CHROMATIC TRANSITION; CONJUGATED POLYMER; MEMBRANE INTERACTIONS; ESCHERICHIA-COLI; SENSOR; FILMS; THERMOCHROMISM; NANOPARTICLES; SPHINGOMYELIN; SPECTROSCOPY;

D O I：

10.1021/jp105604t

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 synthesis of 10,12-pentacosadyinoic acid (PCDA) and PCDA + cholesterol (CHO) + sphingomyelin (SPH) vesicles dispersed in water and the determination of their colorimetric response induced by small amount of organic solvents. In the absence of solvent, PCDA and PCDA/CHO/SPH vesicles showed an intense blue color. The addition of CHCl3, CH2Cl2, and CCl4 caused a colorimetric transition (CT) in both structures with the following efficiency: CHCl3 > CH2Cl2 congruent to CCl4. However, CH3OH did not cause a blue-to-red transition. By microcalorimetric technique we also determined, for the first time, the enthalpy change associated with the CT process and the energy of interaction between solvent molecules and vesicle self-assembly. We observed that the chloride solvents induced a colorimetric transition, but the thermodynamic mechanism was different for each of them. CT induced by CHCl3 was enthalpically driven, while that caused by CH2Cl2 or CCl4 was entropically driven.

引用

页码：13365 / 13371

页数：7

共 43 条

[41] Colorimetric sensors for volatile organic compounds (VOCs) based on conjugated polymer-embedded electrospun fibers [J].

Yoon, Jaewon ;

Chae, Sang Kyun ;

Kim, Jong-Man .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (11) :3038-+

[42] A reversible colorimetric and fluorescent polydiacetylene vesicle sensor platform [J].

Yuan, Zhongzhe ;

Hanks, Timothy W. .

POLYMER, 2008, 49 (23) :5023-5026

[43] Solvatochromic behavior of a novel soluble polydiacetylene with 2,4,6-tri(4-n-heptylphenyloxy)-3,5-difluorophenyl units directly attached to the conjugated backbone [J].

Zhang, YD ;

Wada, T ;

Sasable, H ;

Wen, JX .

JOURNAL OF FLUORINE CHEMISTRY, 1996, 77 (01) :27-29

← 1 2 3 4 5 →