Anomalous thermal behavior of salicylsalicylic acid and evidence for a monotropic transition to a nematic phase

Journal of Physical Chemistry B

Volumn 108, Issue 23, 2004, Pages 7955-7962

  Ramos, Joaquim J Moura ^a   Diogo, Hermínio P ^b   Godinho, Maria Helena ^c   Cruz, Carlos ^a,d   Merkel, Katarzyna ^e  

^a INSTITUTO SUPERIOR TÉCNICO   (Portugal)

^b INSTITUTO SUPERIOR TÉCNICO   (Portugal)

^c DEPARTAMENTO DE CIÊNCIA DOS MATERIAIS   (Portugal)

^d Centro de Fisica da Materia Condensada   (Portugal)

^e TRINITY COLLEGE DUBLIN   (Ireland)

Author keywords

[No Author keywords available]

Indexed keywords

LIQUID NITROGEN COOLING ACCESSORY (LNCA); NEMATIC PHASE; POWDER X-RAY DIFFRACTOMETRY; SALICYLSALICYLIC ACID;

DIFFERENTIAL SCANNING CALORIMETRY; ESTERS; FOURIER TRANSFORM INFRARED SPECTROSCOPY; GELS; HEAT TRANSFER; HYDROGEN BONDS; MELTING; OPTICAL MICROSCOPY; POLARIZATION; THERMODYNAMICS; X RAY DIFFRACTION;

ORGANIC ACIDS;

EID: 3042598804     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp049903v     Document Type: Article

References (18)

1. Papon, P.; Leblond, J.; Meijer, P. H. E. Physique des Transitions de Phases: Concepts et Applications; Dunod: Paris, 1999.
2. Greener, B.; Archibal, S. J.; Hodkinson, M. Angew. Chem., Int. Ed. 2000, 39, 3601-3604.
3. Cox, P. J.; Gilmour, G. I.; MacManus, S. M. Int. J. Pharm. 2000, 204, 133-136.
4. Diogo, H. P.; Pinto, S. S.; Moura Ramos, J. J. Thermodynamic and Kinetic Behaviour of Salicylsalicylic Acid: A Calorimetric Study. J. Therm. Anal. Calorim., in press.
5. See Japanese web database: http://www.aist.go.jp.
6. Laugier, J.; Bochu, B. Chekcell. (Available via the Internet at http:// www.ccp14.ac.uk/tutorial/Imgp.)
7. Moura Ramos, J. J.; Taveira-Marques, R.; Diogo, H. P. Estimation of the Fragility Index of Indomethacin by DSC Using the Heating and Cooling Rate Dependency of the Glass Transition. J. Pharm. Sci. 2004, 93 (6), 1503-1507.
8. Chen, R.; Kirsch, Y. Analysis of Thermally Stimulated Processes; Pergamon Press: Oxford, 1981.
9. van Turnhout, J. Thermally Stimulated Discharge of Polymer Electrets: A Study on Nonisothemal Dielectric Relaxation Phenomena; Elsevier Science Publishing: Amsterdam, 1975.
10. Teyssèdre, G.; Lacabanne, C. Some Considerations about the Analysis of Thermostimulated Depolarisation Peaks. J. Phys. D: Appl. Phys. 1995, 28, 1478-1487.
11. Correia, N. T.; Alvarez, C.; Moura Ramos, J. J.; Descamps, M. The β-α Branching in D-Sorbitol as Studied by Thermally Stimulated Depolarization Currents (TSDC). J. Phys. Chem. B 2001, 105, 5663-5669.
12. Correia, N. T.; Moura Ramos, J. J.; Descamps, M.; Collins, G. Molecular Mobility and Fragility in Indomethacin: A Thermally Stimulated Depolarisation Currents Study. Pharm. Res. 2001, 18, 1767-1774.
13. Correia, N. T.; Diogo, H. P.; Moura Ramos, J. J., unpublished results.
14. Dierking, I. Textures of Liquid Crystals; Wiley: Weinheim, 2003.
15. Pershan, P. S. Structure of Liquid Crystal Phases; World Scientific: River Edge, NJ, 1988.
16. Guillon, D. Columnar Order in Thermotropic Mesophases. In Structure and Bonding; Springer-Verlag: Berlin, 1999; Vol. 95, pp 41-82.
17. Levelut, A M.; Hardouin, F.; Gasparoux, H.; Destrade, C.; Tinh, N. H. J. Phys. 1981, 42, 147-152.
18. All calculations were performed using the GAUSSIAN 98 (G98W) and HyperChem5.1 programs.