Solubility of a spiroindolinonaphthoxazine photochromic dye in supercritical carbon dioxide

Experimental determination and correlation

P. Coimbra, M. H. Gil, C. M.M. Duarte, B. M. Heron, H. C. De Sousa

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The measurement and correlation of the experimental solubility of a spiroindolinonaphthoxazine photochromic dye (1,3-dihydro-3,3-dimethyl-1- isopropyl-6′-(2,3)-(dihydroindole-1-yl)spiro[2H-indole-2, 3′-3H-naphtho[2,1-b] [1,4] oxazine]) in supercritical carbon dioxide (scCO2) is reported. Results were obtained using a static analytical method, at 308.0, 318.0 and 328.0 K, and in a pressure range from 10.0 to 26.0 MPa. Solubility experimental data were correlated with three density-based models (Chrastil, Bartle and Méndez-Santiago-Teja models), with the Ziger-Eckert semi-empirical correlation and with two cubic equation-of-state (EOS) models, namely the Peng-Robinson EOS (PR-EOS) and the Soave-Redlich-Kwong EOS (SRK-EOS), together with the conventional van der Waals mixing and combining rules. Good correlation results were obtained between the calculated and experimental solubility, to all fitted models. Solubility results clearly indicate the feasibility of processing this dye, and possibly this class of photochromic dyes, using supercritical fluid technologies and processes, for example, supercritical fluid dye impregnation of polymer host materials.

Original languageEnglish
Pages (from-to)120-128
Number of pages9
JournalFluid Phase Equilibria
Volume238
Issue number1
Early online date25 Oct 2005
DOIs
Publication statusPublished - 25 Nov 2005
Externally publishedYes

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Carbon Dioxide
carbon dioxide
Carbon dioxide
Coloring Agents
solubility
Dyes
Solubility
dyes
Equations of state
equations of state
Supercritical fluids
supercritical fluids
Oxazines
cubic equations
indoles
Impregnation
Polymers
polymers
Processing

Cite this

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title = "Solubility of a spiroindolinonaphthoxazine photochromic dye in supercritical carbon dioxide: Experimental determination and correlation",
abstract = "The measurement and correlation of the experimental solubility of a spiroindolinonaphthoxazine photochromic dye (1,3-dihydro-3,3-dimethyl-1- isopropyl-6′-(2,3)-(dihydroindole-1-yl)spiro[2H-indole-2, 3′-3H-naphtho[2,1-b] [1,4] oxazine]) in supercritical carbon dioxide (scCO2) is reported. Results were obtained using a static analytical method, at 308.0, 318.0 and 328.0 K, and in a pressure range from 10.0 to 26.0 MPa. Solubility experimental data were correlated with three density-based models (Chrastil, Bartle and M{\'e}ndez-Santiago-Teja models), with the Ziger-Eckert semi-empirical correlation and with two cubic equation-of-state (EOS) models, namely the Peng-Robinson EOS (PR-EOS) and the Soave-Redlich-Kwong EOS (SRK-EOS), together with the conventional van der Waals mixing and combining rules. Good correlation results were obtained between the calculated and experimental solubility, to all fitted models. Solubility results clearly indicate the feasibility of processing this dye, and possibly this class of photochromic dyes, using supercritical fluid technologies and processes, for example, supercritical fluid dye impregnation of polymer host materials.",
keywords = "Cubic equations of state, Density-based correlations, Photochromic dyes, Solubility, Supercritical carbon dioxide",
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Solubility of a spiroindolinonaphthoxazine photochromic dye in supercritical carbon dioxide : Experimental determination and correlation. / Coimbra, P.; Gil, M. H.; Duarte, C. M.M.; Heron, B. M.; De Sousa, H. C.

In: Fluid Phase Equilibria, Vol. 238, No. 1, 25.11.2005, p. 120-128.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Solubility of a spiroindolinonaphthoxazine photochromic dye in supercritical carbon dioxide

T2 - Experimental determination and correlation

AU - Coimbra, P.

AU - Gil, M. H.

AU - Duarte, C. M.M.

AU - Heron, B. M.

AU - De Sousa, H. C.

PY - 2005/11/25

Y1 - 2005/11/25

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AB - The measurement and correlation of the experimental solubility of a spiroindolinonaphthoxazine photochromic dye (1,3-dihydro-3,3-dimethyl-1- isopropyl-6′-(2,3)-(dihydroindole-1-yl)spiro[2H-indole-2, 3′-3H-naphtho[2,1-b] [1,4] oxazine]) in supercritical carbon dioxide (scCO2) is reported. Results were obtained using a static analytical method, at 308.0, 318.0 and 328.0 K, and in a pressure range from 10.0 to 26.0 MPa. Solubility experimental data were correlated with three density-based models (Chrastil, Bartle and Méndez-Santiago-Teja models), with the Ziger-Eckert semi-empirical correlation and with two cubic equation-of-state (EOS) models, namely the Peng-Robinson EOS (PR-EOS) and the Soave-Redlich-Kwong EOS (SRK-EOS), together with the conventional van der Waals mixing and combining rules. Good correlation results were obtained between the calculated and experimental solubility, to all fitted models. Solubility results clearly indicate the feasibility of processing this dye, and possibly this class of photochromic dyes, using supercritical fluid technologies and processes, for example, supercritical fluid dye impregnation of polymer host materials.

KW - Cubic equations of state

KW - Density-based correlations

KW - Photochromic dyes

KW - Solubility

KW - Supercritical carbon dioxide

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U2 - 10.1016/j.fluid.2005.09.024

DO - 10.1016/j.fluid.2005.09.024

M3 - Article

VL - 238

SP - 120

EP - 128

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

SN - 0378-3812

IS - 1

ER -