Experimental Evidence of Reversible Crystalline State Transformation of 2,2':6',2"-Terpyridine: Visualization and Seed Effect
ABSTRACT
We have succeeded in causing reversible polymorphic transformation of 2,2':6',2"-terpyridine (terpy). By contacting a template terpy crystal with the target crystal, reversible orthorhombic-to-monoclinic transformation occurred directly without via melting state. The transformation process is successfully visualized and it is found that the template crystal influences the transition temperature itself.
We have succeeded in causing reversible polymorphic transformation of 2,2':6',2"-terpyridine (terpy). By contacting a template terpy crystal with the target crystal, reversible orthorhombic-to-monoclinic transformation occurred directly without via melting state. The transformation process is successfully visualized and it is found that the template crystal influences the transition temperature itself.
Cite this paper
Yokota, M. , Ito, A. and Doki, N. (2015) Experimental Evidence of Reversible Crystalline State Transformation of 2,2':6',2"-Terpyridine: Visualization and Seed Effect. Advances in Chemical Engineering and Science, 5, 484-489. doi: 10.4236/aces.2015.54050.
Yokota, M. , Ito, A. and Doki, N. (2015) Experimental Evidence of Reversible Crystalline State Transformation of 2,2':6',2"-Terpyridine: Visualization and Seed Effect. Advances in Chemical Engineering and Science, 5, 484-489. doi: 10.4236/aces.2015.54050.
References
[1] Mutai, T., Satou, H. and Araki, K. (2005) Reproducible On-Off Switching of Solid-State Luminescence by Controlling Molecular Packing through Heat-Mode Interconversion. Nature Materials, 4, 685-687.
http://dx.doi.org/10.1038/nmat1454 [2] Bessel, C.A., See, R.F., Jameson, D.L., Churchill, M. and Takeuchi, K.J. (1992) Structural Considerations of Terdentate Ligands: Crystal Structures of 2,2′: 6′,2″-terpyridine and 2,6-bis(pyrazol-1-yl)pyridine. Journal of the Chemical Society, Dalton Transactions, 22, 3223-3228.
http://dx.doi.org/10.1039/DT9920003223 [3] Bowes, K.F., Clark, I.P., Cole, J.M., Gourlay, M., Griffin, A.M.E., Mahon, M.F., Ooi, L., Parker, A.W., Raithby, P.R., Sparkes, H.A. and Towrie, M. (2005) A New Polymorph of Terpyridine: Variable Temperature X-Ray Diffraction Studies and Solid State Photophysical Properties. CrystEngComm, 7, 269-275.
http://dx.doi.org/10.1039/b502275d
[1] Mutai, T., Satou, H. and Araki, K. (2005) Reproducible On-Off Switching of Solid-State Luminescence by Controlling Molecular Packing through Heat-Mode Interconversion. Nature Materials, 4, 685-687.
http://dx.doi.org/10.1038/nmat1454 [2] Bessel, C.A., See, R.F., Jameson, D.L., Churchill, M. and Takeuchi, K.J. (1992) Structural Considerations of Terdentate Ligands: Crystal Structures of 2,2′: 6′,2″-terpyridine and 2,6-bis(pyrazol-1-yl)pyridine. Journal of the Chemical Society, Dalton Transactions, 22, 3223-3228.
http://dx.doi.org/10.1039/DT9920003223 [3] Bowes, K.F., Clark, I.P., Cole, J.M., Gourlay, M., Griffin, A.M.E., Mahon, M.F., Ooi, L., Parker, A.W., Raithby, P.R., Sparkes, H.A. and Towrie, M. (2005) A New Polymorph of Terpyridine: Variable Temperature X-Ray Diffraction Studies and Solid State Photophysical Properties. CrystEngComm, 7, 269-275.
http://dx.doi.org/10.1039/b502275d