Solvent-Dependent Stoichiometry in Perylene鈥?,7,8,8-Tetracyanoquinodimethane Charge Transfer Compound Single Crystals
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- 作者：Peng Hu ; Lin Ma ; Ke Jie Tan ; Hui Jiang ; Fengxia Wei ; Chuhuan Yu ; Katelyn P. Goetz ; Oana D. Jurchescu ; L. E. McNeil ; Gagik G. Gurzadyan ; Christian Kloc
- 刊名：Crystal Growth & Design
- 出版年：2014
- 出版时间：December 3, 2014
- 年：2014
- 卷：14
- 期：12
- 页码：6376-6382
- 全文大小：427K
- ISSN：1528-7505
文摘
Perylene forms three binary compounds with TCNQ. Using a physical vapor transport (PVT) method, mixtures of P1T1 (perylene1鈥揟CNQ1), P2T1 (perylene2鈥揟CNQ1), and P3T1 (perylene3鈥揟CNQ1) crystals can be grown simultaneously. Solution-grown crystals exhibit a stoichiometry that depends on the solvent used and not on the initial stoichiometry of the perylene and TCNQ: only single crystals of P1T1 were grown from toluene, and only P3T1, from benzene. Precipitation鈥揹issolution theory was employed to explain this phenomenon. We found that P1T1 is less soluble than P3T1 in toluene, which resulted in its preponderant growth from this solvent. Using the same argument, we could also explain the growth of P3T1 from benzene. Crystallization of P2T1 from solution was not possible. In addition, steady-state and time-resolved fluorescence measurements indicate that the difference in solubility of TCNQ in benzene and toluene leads to different fluorescence spectra due to selective crystallization of P1T1 and P3T1 from toluene and benzene.