Kang, J.G. and Shin, J.S. and Cho, D.H. and Jeong, Y.K. and Park, C. and Soh, S.F. and Lai, C.S. and Tiekink, E.R.T. (2010) Steric control over supramolecular polymer formation in trans-1,2-Bis(4-pyridyl)ethylene adducts of zinc xanthates: implications for luminescence. Crystal Growth & Design, 10 (3). pp. 1247-1256.
Full text not available from this repository.Abstract
Steric control over supramolecular aggregation is demonstrated for a series of adducts formed between Zn(S2COR)(2) and trans-1,2-bis(4-pyridyl)ethylene, whereby supramolecular zigzag polymers are found when R is small, that is, Et (1) and n-Bu (2). but only bimetallic aggregates Could be formed when R = Cy (3). This results in different coordination geometries: four-coordinate N2S2 zinc in 1 and 2, and five-coordinate NS4 zinc in 3, a feature which greatly influences photophysical responses ill the solid State. When excited in the UV region, {Zn(St(2)COEt)(2)L}(infinity) (1) and {[Zn(S2COCy)(2)](2)L} (3) produce broad luminescence in the visible region. Five-coordinate 3 produces more broad and intense luminescence than four-coordinate 1. The configuration interaction singles (CIS) and post-Hartree-Fock (HF) calculations for 1 and 3 indicate the A-band excited state is responsible for the observed luminescence which is strongly associated with charge transfer from S and Zn.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Subjects: | Q Science > QD Chemistry |
| Depositing User: | Dr Mohd Faizal Hamzah |
| Date Deposited: | 21 Dec 2015 08:00 |
| Last Modified: | 21 Dec 2015 08:00 |
| URI: | http://eprints.um.edu.my/id/eprint/15122 |
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