Mashraqui, Sabir H. ; Ghadigaonkar, Shailesh ; Ashraf, Mohamed ; Sri Ranjini, A. ; Ghosh, Sampa ; Das, P. K. (2007) Optically transparent and thermally stable nonlinear optic chromophores featuring a thieno [2, 3-b] thiophene donor Tetrahedron, 63 (40). pp. 10011-10017. ISSN 0040-4020
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.tet.2007.07.059
Abstract
A thieno[2,3-b]thiophene core has been utilized as a Π-donor component to design two series of push-pull thienothiophenes by introducing various acceptor groups either via olefinic or aza-spacers. The molecules show a UV-visible cut-off wavelength below the second harmonic generation (SHG) at λ/2 of 532 nm, thereby conforming to the nonlinearity-transparency trade-off. Second order molecular nonlinearity, β measured by Hyper-Rayleigh scattering technique was found in the range of 9.58-47.66×10-30 esu, while the Kurtz powder technique produced signals of the order of 0.43-1.02 U. Thermal decomposition temperatures measured by differential scanning calorimetry revealed decomposition temperatures≥275°C, indicating high thermal stability.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Nonlinear Optics; Push-pull Thieno[2,3-b]thiophenes; Synthesis; UV-visible; First Hyperpolarizability; Hyper-Rayleigh Scattering Technique; Kurtz Powder Method; Thermal Decomposition |
| ID Code: | 86348 |
| Deposited On: | 09 Mar 2012 10:42 |
| Last Modified: | 09 Mar 2012 10:42 |
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