Fluorescent lanthanide complexes of Schiff base ligands possessing<i>N</i>-aryl moiety: influence of chain length on crossover (calamitic to discotic) phase behaviour

Rao, N. V. S.; Choudhury, Trirup Dutta; Deb, Rahul; Paul, M. K.; Rao, T. R.; Tuluri, Francis; Smalyukh, Ivan I.

doi:10.1080/02678292.2010.517328

Cited by 21 publications

(2 citation statements)

References 67 publications

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“…Schiff base ligands possessing a N -aryl moieties have been used by Rao and co-workers to prepare different Ln(III) complexes with mesomorphic properties . A modification between the calamitic lamellar to discotic columnar phase was reported and controlled by the chain length incorporated in the terminal N -aryl ring of the Tb(III) complexes 122a – c shown in Chart .…”

Section: Lanthanide Metallomesogens and The Antenna Effectmentioning

confidence: 99%

Advanced Functional Luminescent Metallomesogens: The Key Role of the Metal Center

2021

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The use of liquid crystals for the fabrication of displays incorporated in technological devices (TVs, calculators, screens of eBook’s, tablets, watches) demonstrates the relevance that these materials have had in our way of living. However, society evolves, and improved devices are looked for as we create a more efficient and safe technology. In this context, metallomesogens can behave as multifunctional materials because they can combine the fluidic state of the mesophases with properties such as photo and electroluminescence, which offers new exciting possibilities in the field of optoelectronics, energy, environment, and even biomedicine. Herein, it has been established the role of the molecular geometry induced by the metal center in metallomesogens to achieve the self-assembly required in the liquid-crystalline mesophase. Likewise, the effect of the coordination environment in metallomesogens has been further analyzed because of its importance to induce mesomorphism. The structural analysis has been combined with an in-depth discussion of the properties of these materials, including their current and potential future applications. This review will provide a solid background to stimulate the development of novel and attractive metallomesogens that allow designing improved optoelectronic and microelectronic components. Additionally, nanoscience and nanotechnology could be used as a tool to approach the design of nanosystems based on luminescent metallomesogens for use in bioimaging or drug delivery.

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Section: Lanthanide Metallomesogens and The Antenna Effectmentioning

confidence: 99%

Advanced Functional Luminescent Metallomesogens: The Key Role of the Metal Center

2021

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“…Liquid crystals based on lanthanide complexes (lanthanidomesogens) are well-investigated anisotropic materials that develop interesting photophysical properties [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Along the time, the unique photophysical properties of the lanthanide ions provided a strong fundament for the design and study of their complexes with liquid crystal properties and these compounds are mainly built around several categories of organic ligands, among the most used were the Schiff bases, β-diketonates, alkanoates, different macrocyclic ligands (phthalocyanine, porphyrin, etc.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Emission Properties of a Series of Lanthanides Complexes with N-Biphenyl-Alkylated-4-Pyridone Ligands: Crystal Structure of a Terbium Complex with N-Benzyl-4-Pyridone

et al. 2021

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This work focuses on the investigation of the liquid crystalline behavior and luminescence properties of the lanthanide complexes of Eu(III), Sm(III) and Tb(III) with N-biphenyl-alkylated-4-pyridone ligands. The organic ligands having a biphenyl group attached via a long flexible spacer with either 9 or 10 carbon atoms were synthesized by the reaction between 4-hydroxypyridine and the corresponding bromide compounds. The chemical structures of the organic and lanthanide complexes were assigned based on elemental analysis, single-crystal X-ray diffraction, 1H, 13C NMR and IR spectroscopies, and thermogravimetric analysis (TGA). The X-ray diffraction analysis of a parent compound shows that the lanthanide ions are surrounded by three monodentate pyridone ligands and three bidentate nitrate ions, giving a 9-coordinate environment. The mesogenic behavior and the type of liquid crystalline phases exhibited by the new complexes were analyzed by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM), and powder X-ray diffraction (XRD) studies. Only the lanthanide complexes with longer spacer (10) display a monotropic SmA phase, typically on a short thermal range (less than 10 °C). The complexes with shorter flexible chains (9) show no liquid crystalline properties with melting temperatures lower than their analogs with longer spacers. The emission spectra recorded in solid state at room temperatures show typical emission bands for each lanthanide ion employed (Eu(III), Tb(III) and Sm(III)).

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Self‐Organized Semiconducting Discotic Liquid Crystals for Optoelectronic Applications

Xue

2012

Liquid Crystals Beyond Displays

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Fluorescent lanthanide complexes of Schiff base ligands possessingN-aryl moiety: influence of chain length on crossover (calamitic to discotic) phase behaviour

Cited by 21 publications

References 67 publications

Advanced Functional Luminescent Metallomesogens: The Key Role of the Metal Center

Advanced Functional Luminescent Metallomesogens: The Key Role of the Metal Center

Thermal and Emission Properties of a Series of Lanthanides Complexes with N-Biphenyl-Alkylated-4-Pyridone Ligands: Crystal Structure of a Terbium Complex with N-Benzyl-4-Pyridone

Self‐Organized Semiconducting Discotic Liquid Crystals for Optoelectronic Applications

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