Zou, T;
Wang, X;
Ju, H;
Zhao, L;
Guo, T;
Wu, W;
Wang, H;
(2018)
Controllable molecular packing motif and overlap type in organic nanomaterials for advanced optical properties.
Crystals
, 8
(1)
, Article 22. 10.3390/cryst8010022.
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Abstract
The optical properties of organic materials are very sensitive to subtle structural modification, and a proper understanding of the structure-property relationship is essential to improve the performance of organic electronic devices. The phase transitions of the η-CuPc to the α-CuPc, then to the β-CuPc were investigated using In situ X-ray diffraction and the differential scanning calorimetry (DSC). The five stages in the phase-transition process from low to high-temperature were observed, which consisted of (1) the η-CuPc; (2) a mixture of the η- and α-CuPc; (3) a mixture of the η-, α- and β-CuPc; (4) a mixture of the α- and β-CuPc; and (5) the β-CuPc. The vibrational and optical properties at different phase-transition stages were correlated to molecular packing motif and molecule overlap type through systematic analyses of the Fourier–transform infrared, Raman and UV-VIS spectra. Moreover, the mechanism for the morphology evolution was also discussed in detail.
| Type: | Article |
|---|---|
| Title: | Controllable molecular packing motif and overlap type in organic nanomaterials for advanced optical properties |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/cryst8010022 |
| Publisher version: | http://dx.doi.org/10.3390/cryst8010022 |
| Language: | English |
| Additional information: | This is an open access article distributed under the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0). |
| Keywords: | nanomaterials; copper phthalocyanine; crystal structure; phase transition; optical properties; vibrational properties |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10044047 |
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