期刊
LIQUID CRYSTALS
卷 36, 期 2, 页码 123-132出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678290802696173
关键词
palladium complex; platinum complex; ortho-metallation; N-benzoylthiourea derivative; TSDC
资金
- MEdC (Romanian Ministry of Education and Research) [CNCSIS-1640, PNII ID_954, PNII ID_123]
- NATO
A series of ortho-metallated Pd and Pt complexes containing an imine ligand carrying three alkoxy chains and N-benzoylthiourea derivatives as co-ligands were prepared and their liquid crystalline properties investigated. Their structures were assigned based on elemental analysis, IR and 1H NMR spectroscopy, whereas thermal properties were investigated by differential scanning calotimetry and polarising optical microscopy. All the compounds exhibit monotropic transitions involving nematic and smectic A phases, with the mesomorphic behaviour strongly related to the type of N-benzoylthiourea as well as the metal centre used. The thermally stimulated depolarisation current technique was employed to determine the conduction mechanism, phase transition temperature and the activation energies for one of the ortho-metallated Pd complexes.
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