Synthesis, characterization and mesomorphic properties of Ag(I) and Pd(II) complexes containing the pyridyl and tetrazoyl rings: crystal structure of [C30H46N10Ag ClO4]

Gallardo, Hugo; Magnago, Rachel Faverzani; Bortoluzzi, Adaílton J.

doi:10.1080/02678290110066813

Cited by 60 publications

(27 citation statements)

References 15 publications

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“…16 In the liquid crystals eld there are a few reports about the synthesis of tetrazoles and their LC properties. [17][18][19] Our synthetic efforts have showed that the tetrazole ring can be used as an alternative building block to prepare a new and more anisotropic class of LCs such as biaxial nematic or ferroelectric smectic C mesophases. The aim of our present work is to report…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of some novel tetrazole liquid crystals

et al. 2013

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The synthesis and characterization of new 4-[(2-alkyl)-2H-tetrazol-5-yl]phenyl 4-alkyloxybenzoates (5a-i) and 5-{4-[(4-substituted)benzyloxy]phenyl}-2-alkyl-2H-tetrazoles (7a-e) are reported. The reported tetrazoles contain two alkyl chains (six to ten carbon atoms) except for 5h and 7e which have a chiral citronellyl group linked at the N-2 nitrogen atom of the tetrazole ring and 5i having a bromine atom at the para position of benzoate. The regiochemistry in the alkylation step was established unequivocally by single-crystal X-ray analysis for 5a and 5f. The regioselectivity in the alkylation step was also confirmed by analysis of 13 C NMR chemical shifts of the C 5 carbon atom in the tetrazole ring and the methylene carbon atom vicinal to the nitrogen atom. The mesogenic behavior of the liquid crystals was characterized by polarizing optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) techniques. The tetrazolyl benzoates 5a-h show a nematic mesophase. The lengthening of alkyl chains favors the appearance of the smectic mesophase. For instance, 5g displayed nematic and smectic C mesophases, while 5h which has the chiral citronellyl group displayed nematic and smectic A mesophases. Tetrazoles 7a-e did not show mesomorphic behavior mainly due to replacement of the carbonyl by a methylene group.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of some novel tetrazole liquid crystals

et al. 2013

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“…In recent years, many mesomorphic compounds containing differing heterocyclic units have been synthesized, with the interest in such structures growing constantly [10][11][12]. This is not only because of the greater possibilities with heterocyclics in the design of new mesogenic molecules, but also due to fact that the insertion of heteroatoms strongly influences the formation of mesomorphic phases.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and comparative studies of phase transition behaviour of new dimeric liquid crystals consisting of dimethyluracil and biphenyl cores

Mohammad

Srinivasa

et al. 2016

Journal of Molecular Liquids

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A new homologous series of mesogens containing 6-amino-1,3-dimethyluracil moiety have been synthesized. The structures of the compounds were characterised by elemental analysis, FT-IR, 1 H and 13 C NMR spectroscopic techniques. Their mesomorphic properties were studied by polarising optical microscopy attached to a heating stage. Microscopy data were supported with transition temperatures and enthalpy change values obtained from the differential scanning calorimetry analysis. The studies have shown that the mesomorphic properties of the compounds are dependent on the lengths of alkoxy-spacers. Compounds 4a-f with a shorter alkoxyspacer chain (n = 6) exhibited smectic A phase, while compounds 4g-r with a alkoxy-spacer chain (n = 8 or 10) displayed nematic phase.

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“…Moreover, as core units, heterocycles play an important role in the molecular shape of MOCs. The introduced heteroatoms (S, O and N) [10][11][12] cause a considerable change of corresponding physical properties of MOCs. Therefore, MOCs with benzimidazole and imidazole ligands (N atoms ligand on heterocycles) including silver with 1-alkylimidazoles ligand [13], gold with benzimidazole and imidazole ligands [14], and silver and gold derived from 3-(4-dodecyloxybenzyl)-1-methyl-1H-imidazolium ligand [15], have been reported by several recent studies.…”

Section: Introduction M Etal-organic Complexes (Mocs) Containmentioning

confidence: 99%

A Cobalt (II) Complex [Co(VIM)4](NCS)2 Based on 1-vinylimidazole (VIM) and SCN–

Tang¹,

Gao²,

Han³

et al. 2016

JRST

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ABSTRACT:A cobalt complex of [Co(VIM) 4 ](NCS) 2 (VIM = 1-vinylimidazole) was synthesized by 1-vinylimidazolium with CoCl 2 and KSCN in acetone. The structure was determined by X-ray crystallography, infrared spectrum, and elemental analysis. The coordination environment of the Co atom was basically octahedron, comprising four nitrogen atoms from 1-vinylimidazole ring and two nitrogen atoms from NCS -anion. The 3D supramolecular structure is constructed with the hydrogen bond intermolecular interactions. The melting temperature of complex [Co(VIM) 4 ] (NCS) 2 is 153.6°C, the solidification temperature is 119.9°C. The title complex is easily soluble in acetone, slightly soluble in methanol, alcohol, chloroform and ethyl acetate, insoluble in petroleum ether, water, and benzene.

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Synthesis, characterization and mesomorphic properties of Ag(I) and Pd(II) complexes containing the pyridyl and tetrazoyl rings: crystal structure of [C₃₀H₄₆N₁₀Ag ClO₄]

Cited by 60 publications

References 15 publications

Synthesis and characterization of some novel tetrazole liquid crystals

Synthesis and characterization of some novel tetrazole liquid crystals

Synthesis and comparative studies of phase transition behaviour of new dimeric liquid crystals consisting of dimethyluracil and biphenyl cores

A Cobalt (II) Complex [Co(VIM)4](NCS)2 Based on 1-vinylimidazole (VIM) and SCN–

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