Polymorphism of the azobenzene dye compound methyl yellow
| Autor: | Aron Walsh, Chick C. Wilson, Christopher H. Hendon, Dyanne L. Cruickshank, Matthew Verbeek |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Absorption spectroscopy
MOLECULAR-CRYSTALS 0306 Physical Chemistry (Incl. Structural) Chemistry Multidisciplinary 02 engineering and technology Crystal structure Methyl yellow 010402 general chemistry 01 natural sciences chemistry.chemical_compound Differential scanning calorimetry 0302 Inorganic Chemistry Molecule General Materials Science PORPHYRINS 0912 Materials Engineering Science & Technology Crystallography Chemistry Intermolecular force General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Azobenzene Polymorphism (materials science) Physical Sciences Inorganic & Nuclear Chemistry 0210 nano-technology |
| Zdroj: | Cruickshank, D L, Hendon, C H, Verbeek, M J R, Walsh, A & Wilson, C C 2016, ' Polymorphism of the azobenzene dye compound methyl yellow ', CrystEngComm, vol. 18, no. 19, pp. 3456-3461 . https://doi.org/10.1039/c6ce00387g |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/c6ce00387g |
| Popis: | The crystal structure and polymorphism of the well-known aminoazobenzene, N,N-dimethyl-4-aminoazobenzene (DAB) are studied; a second polymorph of DAB reported and the relationship between the two polymorphs studied using differential scanning calorimetry and by evaluating their lattice energies and absorption spectra. Without significantly strong intermolecular interactions present in the two forms of DAB, a balance between conformational strain and a cumulative π-orbital overlapping effect results in the existence of the enantiotropically related polymorphs and their alternative packing arrangements. The UV/vis spectra of the two polymorphs are different, thus illustrating the significance of small structural changes on the colour of a material, which could behave differently under particular sensing conditions. DAB has been used primarily as an acid/base indicator solution and a dye molecule and the implications of the polymorphic relationships established here are discussed with respect to the range of applications this molecule finds as a sensor and for its incorporation into various functional films and devices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|