Yeo, Chien Ing and Tan, Yee Seng and Kwong, Huey Chong and Lee, Vannajan Sanghiran and Tiekink, Edward R. T. (2022) I center dot center dot center dot N halogen bonding in 1: 1 co-crystals formed between 1,4-diiodotetrafluorobenzene and the isomeric n-pyridinealdazines (n=2, 3 and 4): assessment of supramolecular association and influence upon solid-state photoluminescence properties. CrystEngComm, 24 (43). pp. 7579-7591. ISSN 1466-8033,
Full text not available from this repository.Abstract
1 : 1 co-crystals formed between 1,4-diiodotetrafluorobenzene and each of the three isomeric n-pyridinealdazines (n = 2, 3 and 4) have been characterised by X-ray crystallography, a variety of spectroscopic methods, viz. IR, Raman, NMR: solution- and solid-state (C-13 CP MAS and C-13 HPDEC MAS) and fluorescence as well as by computational chemistry techniques. The primary connection between the respective coformers arises from I center dot center dot center dot N halogen bonds which give rise to one-dimensional supramolecular chains of varying topology depending on the position of the nitrogen atom in the n-pyridinealdazine isomer. The energies calculated for the I center dot center dot center dot N contacts are relatively small, varying from 5.4 to 6.3 kcal mol(-1), with the maximum being in the crystal of the n = 3 isomer. Notable in the molecular packing are C-I center dot center dot center dot pi(pyridine) and C-F center dot center dot center dot pi(arene) interactions in the crystals with the 3- and 4-pyridinealdazine coformers, respectively. The co-crystal formed by 2-pyridinealdazine exhibited fluorescence emission.
| Item Type: | Article |
|---|---|
| Funders: | None |
| Subjects: | Q Science > Q Science (General) |
| Divisions: | Universiti Malaya |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 04 Nov 2025 12:53 |
| Last Modified: | 04 Nov 2025 12:53 |
| URI: | http://eprints.um.edu.my/id/eprint/40805 |
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