Abstract
Two new series of mesogenic palladium complexes 1a-b derived from salicylaldimines containing phenyl or naphenyl moiety were prepared, characterized and their mesomorphic properties investigated. Two single crystallographic structures of mesogenic 1a (n=4) and nonmesogenic 1b (n=3) were determined by X-ray analysis; both crystals crystallize in a triclinic space group P1. The geometry at both palladium atoms was nearly square planar. All Schiff bases 2a-b and palladium complexes 1a-b exhibited mesomorphic properties. However, the formation of mesophases was sensitive to terminal naphthalyl and phenyl group. Compounds 2a formed N or/and SmC phases and compounds 2b exhibited N or/and SmC phases. In contrast, palladium complexes 1a formed N or N/SmC phases and complexes 1b exhibited N, N or/and SmC phases. Compounds 1b have a higher clearing temperature than those of 1a by a ΔTcl=35.4-14.8 °C. An improved mesomorphic behavior observed in compounds 1b was attributed to the H-bonds and π-π interaction.
Original language | English |
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Pages (from-to) | 8649-8660 |
Number of pages | 12 |
Journal | Tetrahedron |
Volume | 71 |
Issue number | 45 |
DOIs | |
State | Published - 11 Nov 2015 |
Keywords
- Metallomesogens
- Nematic
- Salicladimines
- Smectic
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CCDC 1502950: Experimental Crystal Structure Determination
Liu, T.-M. (Creator), Lin, K.-T. (Creator), Li, F.-J. (Creator), Lee, G.-H. (Creator), Chen, M.-C. (Creator) & Lai, C. K. (Creator), The Cambridge Structural Database, 2016
DOI: 10.5517/ccdc.csd.cc1mfy88, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc1mfy88&sid=DataCite
Dataset
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CCDC 1502949: Experimental Crystal Structure Determination
Liu, T.-M. (Creator), Lin, K.-T. (Creator), Li, F.-J. (Creator), Lee, G.-H. (Creator), Chen, M.-C. (Creator) & Lai, C. K. (Creator), The Cambridge Structural Database, 2016
DOI: 10.5517/ccdc.csd.cc1mfy77, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc1mfy77&sid=DataCite
Dataset