Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β‐diketonate) Adducts

Knyazev, A. A.; Karyakin, M. E.; Романова, К А; Heinrich, Benoît; Donnio, Bertrand; Galyametdinov, Yu. G.

doi:10.1002/ejic.201601286

Cited by 35 publications

(38 citation statements)

References 43 publications

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“…1). Порошки комплексов с такой структурой не подвержены кристаллизации, обладают высокой термостабильностью и низкими температурами размягчения [25][26][27][28][29][30][31]. Данные свойства позволят создавать из расплавов порошков этих соединений застеклованные пленки [29,30,[34][35][36][37][38].…”

Section: локальная структура застеклованных пленокunclassified

“…Порошки комплексов с такой структурой не подвержены кристаллизации, обладают высокой термостабильностью и низкими температурами размягчения [25][26][27][28][29][30][31]. Данные свойства позволят создавать из расплавов порошков этих соединений застеклованные пленки [29,30,[34][35][36][37][38]. Способность порошков мезогенных β-дикетонатных комплексов лантаноидов к стеклованию доказана с помощью дифференциальной сканирующей калориметрии и поляризационной оптической микроскопии [25,[29][30][31]37].…”

Section: локальная структура застеклованных пленокunclassified

“…Данные свойства позволят создавать из расплавов порошков этих соединений застеклованные пленки [29,30,[34][35][36][37][38]. Способность порошков мезогенных β-дикетонатных комплексов лантаноидов к стеклованию доказана с помощью дифференциальной сканирующей калориметрии и поляризационной оптической микроскопии [25,[29][30][31]37]. Технология позволяет изготавливать закрытые (закрепленные между кварцевыми пластинами) и открытые (нанесенные на поверхность кварцевых пластин) застеклованные пленки.…”

Section: локальная структура застеклованных пленокunclassified

“…Нами предложен альтернативный подход к решению вышеуказанных проблем, основанный на синтезе мезогенных β-дикетонатных комплексов лантаноидов(III) [25][26][27][28][29][30][31]. Принципиальное отличие данных соединений от известных модификаций комплексов лантаноидов(III) с β-дикетонатными лигандами заключается в молекулярной структуре, содержащей помимо традиционно используемых ароматических колец циклогексановые кольца и длинные углеводородные цепочки.…”

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Стратегия создания фотостабильных люминесцентных материалов молекулярной фотоники на основе beta-дикетонатных комплексов лантаноидов (III)-=SUP=-*-=/SUP=-

Лапаев¹,

Никифоров²,

Лобков³

et al. 2019

Журнал Технической Физики

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An analysis of the prospects for creating new luminescent molecular photonics materials based on mesogenic lanthanide(III) β-diketonate complexes is presented. We consider vitrified films that combine intense monochromatic luminescence, high optical quality, and complete resistance to UV radiation with the ability to change their photophysical properties (for example, the absorption band width and luminescence intensity) depending on the local structure and under external actions, such as UV radiation and temperature. The problems of control of the photophysical properties of these films and the possibility of their application as working media of high-tech luminescent materials and devices (for example, luminescent sensors of temperature, oxygen, and UV radiation, as well as light-conversion materials) are discussed.

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Section: локальная структура застеклованных пленокunclassified

unclassified

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Стратегия создания фотостабильных люминесцентных материалов молекулярной фотоники на основе beta-дикетонатных комплексов лантаноидов (III)-=SUP=-*-=/SUP=-

Лапаев¹,

Никифоров²,

Лобков³

et al. 2019

Журнал Технической Физики

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“…[4][5][6][7][8] In the search for highly emissive metallomesogens, lanthanide-containing liquid crystals (lanthanidomesogens) playacentral role, and they are regarded as ap romising class of light-emitting liquid crystalsw ith excellent emissionproperties, such as narrow emission lines of high color purity,t he option of tuning the emission colorb yc hanging the lanthanide ion, and the possibility to create luminescent materials with polarized emission in the liquid-crystalline (LC) state. [9][10][11][12][13][14][15][16][17][18][19][20][21][22] Due to their wide-rang-ing applications, from telecommunications to life sciences, development of novell anthanide-based mesogensi sm uch needed both for fundamentalr esearch and for applications. [23][24][25][26] Amongt he f-blockm etals, Eu III and Tb III complexes were found to be the strongest emitters( red and green, respectively), whereas Sm III compoundsh aveb een lesss tudied due to their lower luminescence intensity in comparison to Eu III andT b III compounds.…”

Section: Introductionmentioning

confidence: 99%

Wide‐Range Columnar and Lamellar Photoluminescent Liquid‐Crystalline Lanthanide Complexes with Mesogenic 4‐Pyridone Derivatives

Chiriac

Pasuk

Secu

et al. 2018

Chemistry A European J

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A series of liquid crystals with various lanthanide ions (Eu , Sm , and Tb ) was designed and prepared starting from the corresponding lanthanide nitrates and N-alkylated 4-pyridone derivatives bearing mesogenic 3,4,5-tris(alkyloxy)benzyl moieties (alkyl=hexyl, octyl, decyl, dodecyl, tetradecyl, or hexadecyl). These new lanthanidomesogens were investigated for their mesogenic properties by a combination of differential scanning calorimetry, polarizing optical microscopy, and temperature-dependent powder X-ray diffraction (XRD). Their thermal stability was assessed by thermogravimetric analysis. All of these complexes show enantiotropic liquid-crystalline behavior with lamellar (SmA) phases in the case of shorter-chain complexes (C and C ) or hexagonal columnar phases (Col ) for complexes with longer alkyl chains (C , C , and C ), which were assigned on the basis of their characteristic textures and XRD studies. For complexes with an intermediate number of carbon atoms in the side chains (C ), both a lamellar phase at lower temperatures and a Col phase at higher temperatures were evidenced. In the solid state, all these complexes show characteristic emissions assigned to the corresponding lanthanide ion. In addition, the luminescence decay curves showed single-exponential decays with characteristic times in the millisecond range (0.75-0.90 ms for Eu , 0.045-0.060 ms for Sm , and 0.75-1.05 ms for Tb ).

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Ab initio molecular dynamics study of the structure and supramolecular organization in mesogenic lanthanum(III) complexes with β‐diketones and Lewis bases

Романова

Kremleva

Galyametdinov

2020

Int J of Quantum Chemistry

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Simulation technique for the study of the structural properties and supramolecular organization of mesogenic lanthanum(III) complexes with β‐diketones and Lewis bases with the combination of high‐level quantum chemical methods and ab initio molecular dynamics was proposed and approved. Three representatives of La(III) complexes with ligands of various nature were investigated and relations between their structural properties and liquid‐crystalline (LC) behavior were studied. It has been shown that the structure of β‐diketones and their substitutes mostly define the number and type of LC mesophases. The Lewis base ligand generally determines the appearance of LC properties. Estimated anisotropy of geometry values for two complexes were found above the known threshold value defining the presence of LC phases. Thus, these complexes are expected to exhibit LC properties, while the third complex not, which is in agreement with the experimental data. We also used Voronoi–Dirichlet polyhedral (VDP) approach to analyze the first coordination sphere of the La(III) complexes. Calculated parameters of VDP helped to evaluate the forces of intermolecular interactions. The unitless normalized second moment of inertia for three exemplary La(III) complexes was found to correlate with the number of the LC phases of the corresponding complexes.

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Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β‐diketonate) Adducts

Cited by 35 publications

References 43 publications

Стратегия создания фотостабильных люминесцентных материалов молекулярной фотоники на основе beta-дикетонатных комплексов лантаноидов (III)-=SUP=-*-=/SUP=-

Стратегия создания фотостабильных люминесцентных материалов молекулярной фотоники на основе beta-дикетонатных комплексов лантаноидов (III)-=SUP=-*-=/SUP=-

Wide‐Range Columnar and Lamellar Photoluminescent Liquid‐Crystalline Lanthanide Complexes with Mesogenic 4‐Pyridone Derivatives

Ab initio molecular dynamics study of the structure and supramolecular organization in mesogenic lanthanum(III) complexes with β‐diketones and Lewis bases

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