Reversible thermo- and mechanochromic behaviour in a 3D hydrogen bonded discrete complex
A 3D hydrogen-bonded Co(II) complex{ Co(34pbz)2•(H2O)4}n (1), where 34pbz is 3-(4-pyridyl)benzoate, is found to exhibit classical thermo- and mechanochromic behaviour. The thermochromic behaviour in the temperature range of 30 – 120 °C is attributed to the disruption of the supramolecular environmen...
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2016
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0277538715003320 https://www.researchgate.net/publication/278683888 http://hdl.handle.net/11408/1863 |
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| author | Mehlana, Gift Wilkinson, Chad Ramon, Gaëlle Bourne, Susan A. |
| author_facet | Mehlana, Gift Wilkinson, Chad Ramon, Gaëlle Bourne, Susan A. |
| author_sort | Mehlana, Gift |
| collection | DSpace |
| description | A 3D hydrogen-bonded Co(II) complex{ Co(34pbz)2•(H2O)4}n (1), where 34pbz is 3-(4-pyridyl)benzoate, is found to exhibit classical thermo- and mechanochromic behaviour. The thermochromic behaviour in the temperature range of 30 – 120 °C is attributed to the disruption of the supramolecular environments. Above 150 °C this behaviour is attributed to loss of coordinated water molecules from the Co(II) which has the effect of altering the visible d-d electronic transitions. Interestingly, when crystals of 1 are ground, a purple colour is observed at ambient light. This mechanochromic property is ascribed to change in the crystal field around the Co(II) centre. These effects are fully reversible as suggested by PXRD and thermal analysis studies. |
| format | Article |
| id | ir-11408-1863 |
| institution | My University |
| language | English |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | ir-11408-18632022-06-27T13:49:06Z Reversible thermo- and mechanochromic behaviour in a 3D hydrogen bonded discrete complex Mehlana, Gift Wilkinson, Chad Ramon, Gaëlle Bourne, Susan A. Coordination network; Luminescence; Mechanical grinding; Hydrogen bonding; 3-(4-Pyridyl)benzoate A 3D hydrogen-bonded Co(II) complex{ Co(34pbz)2•(H2O)4}n (1), where 34pbz is 3-(4-pyridyl)benzoate, is found to exhibit classical thermo- and mechanochromic behaviour. The thermochromic behaviour in the temperature range of 30 – 120 °C is attributed to the disruption of the supramolecular environments. Above 150 °C this behaviour is attributed to loss of coordinated water molecules from the Co(II) which has the effect of altering the visible d-d electronic transitions. Interestingly, when crystals of 1 are ground, a purple colour is observed at ambient light. This mechanochromic property is ascribed to change in the crystal field around the Co(II) centre. These effects are fully reversible as suggested by PXRD and thermal analysis studies. 2016-11-28T13:05:42Z 2016-11-28T13:05:42Z 2015-09 Article 0277-5387 http://www.sciencedirect.com/science/article/pii/S0277538715003320 https://www.researchgate.net/publication/278683888 http://hdl.handle.net/11408/1863 en Polyhedron;Vol. 98; p. 224-229 open Elsevier |
| spellingShingle | Coordination network; Luminescence; Mechanical grinding; Hydrogen bonding; 3-(4-Pyridyl)benzoate Mehlana, Gift Wilkinson, Chad Ramon, Gaëlle Bourne, Susan A. Reversible thermo- and mechanochromic behaviour in a 3D hydrogen bonded discrete complex |
| title | Reversible thermo- and mechanochromic behaviour in a 3D hydrogen bonded discrete complex |
| title_full | Reversible thermo- and mechanochromic behaviour in a 3D hydrogen bonded discrete complex |
| title_fullStr | Reversible thermo- and mechanochromic behaviour in a 3D hydrogen bonded discrete complex |
| title_full_unstemmed | Reversible thermo- and mechanochromic behaviour in a 3D hydrogen bonded discrete complex |
| title_short | Reversible thermo- and mechanochromic behaviour in a 3D hydrogen bonded discrete complex |
| title_sort | reversible thermo- and mechanochromic behaviour in a 3d hydrogen bonded discrete complex |
| topic | Coordination network; Luminescence; Mechanical grinding; Hydrogen bonding; 3-(4-Pyridyl)benzoate |
| url | http://www.sciencedirect.com/science/article/pii/S0277538715003320 https://www.researchgate.net/publication/278683888 http://hdl.handle.net/11408/1863 |
| work_keys_str_mv | AT mehlanagift reversiblethermoandmechanochromicbehaviourina3dhydrogenbondeddiscretecomplex AT wilkinsonchad reversiblethermoandmechanochromicbehaviourina3dhydrogenbondeddiscretecomplex AT ramongaelle reversiblethermoandmechanochromicbehaviourina3dhydrogenbondeddiscretecomplex AT bournesusana reversiblethermoandmechanochromicbehaviourina3dhydrogenbondeddiscretecomplex |