UV laser-induced enhancement of photoluminescence intensity in vitrified terbium(III) β-diketonate complex film in air

Lapaev, Dmitry V.; Никифоров, В. Г.; Сафиуллин, Г. М.; Лобков, В. С.; Knyazev, A. A.; Krupin, Aleksandr S.; Galyametdinov, Yu. G.

doi:10.1016/j.jlumin.2017.10.067

Cited by 22 publications

(19 citation statements)

References 46 publications

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“…In addition, the emission spectrum for complex 3 was monitored on the fixed excitation wavelength at 298 nm, and it exhibits five characteristic sharp emission peaks of Eu (III) ions at 578, 593, 613, 652 and 703 nm assigned to 5 D 0 → 7 F 0 , 5 D 0 → 7 F 1 , 5 D 0 → 7 F 2 , 5 D 0 → 7 F 3 and 5 D 0 → 7 F 4 transitions respectively. And the hypersensitive transition of 5 D 0 → 7 F 2 at 613 nm is the strongest and pure red emission spectrum …”

Section: Resultsmentioning

confidence: 98%

Construction of three types of lanthanide complexes based on 3,4‐dimethylbenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Syntheses, Structures, Thermodynamic properties, Luminescence, and Bacteriostatic activities

Zhu

Ren

Zhang

et al. 2018

Applied Organom Chemis

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Three novel lanthanide complexes [Er (3,4‐DMBA)3(5,5′‐DM‐2,2′‐bipy)(H2O)] (1); [Tb2 (3,4‐DMBA)6(5,5′‐DM‐2,2′‐bipy)2(H2O)] (2); [Eu (3,4‐DMBA)3(3,4‐DMHBA)(5,5′‐DM‐2,2′‐bipy)]2 (3) (3,4‐DMHBA = 3,4‐dimethylbenzoic acid, 5,5′‐DM‐2,2′‐bipy =5,5′‐dimethyl‐2,2′‐bipyridine) were successfully synthesized via conventional solution method at room temperature and structurally characterized by single crystal diffraction. The structures of the complexes 1–3 were confirmed on the basis of elemental analysis, coordination titration analysis, IR and XRD. The molecular structures of complexes 2 and 3 are very particular: complex 2 has two same central metal ions but each metal ion has different coordination environment; in structure of the complex 3, there are eight carboxylic acid ligands coordinated to the central metal ions, which have rarely been reported previously. The thermal decomposition mechanism of complexes 1–3 were investigated by the technology of simultaneous TG/DSC‐FTIR. The heat capacities of the complexes were recorded by means of DSC over the range of from 253.15 K to 345.15 K. The thermodynamic parameters, the smoothed values of heat capacities, enthalpy (HT‐H298.15K) and entropy (ST‐S298.15K) were also calculated. The bacteriostatic activities of the complexes were evaluated against Staphylococcus aureus, Escherichia coli and Candida albicans. What's more, the luminescence properties of complexes 2 and 3 were discussed, and their fluorescence lifetimes as well as the quantum yield of the Eu (III) were measured. To elucidate the energy transfer process of complexes 2 and 3, the energy levels of the relevant electronic states have been estimated.

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Section: Resultsmentioning

confidence: 98%

Construction of three types of lanthanide complexes based on 3,4‐dimethylbenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Syntheses, Structures, Thermodynamic properties, Luminescence, and Bacteriostatic activities

Zhu

Ren

Zhang

et al. 2018

Applied Organom Chemis

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“…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

“…Данные поляризационной оптической микроскопии показали, что пленки оптически изотропны, однородны, не содержат кристаллических включений и сохраняют фотофизические свойства в течение месяцев [29,[34][35][36][37][38]. Важно отметить, что подобные пленки невозможно получить из немезогенных β-дикетонатных комплексов лантаноидов(III) по причине высоких температур плавления (443−543 K) [1,29] и склонности к кристаллизации [29].…”

Section: локальная структура застеклованных пленокunclassified

“…Явное преимущество таких пленок по сравнению с пленочными материалами на основе немезогенных β-дикетонатных комплексов лантаноидов(III) заключается в сочетании интенсивной люминесценции, высокой прозрачности в видимой области и полной устойчивости к УФ излучению. Помимо этого существует возможность изменять их фотофизические свойства (например, ширину полосы поглощения и интенсивность люминесценции) под действием внешних воздействий, таких как УФ излучение и температура [32][33][34][35][36][37][38][39]. При таком подходе отпадает необходимость в сложной, дорогостоящей и времязатратной синтетической модификации β-дикетонатных лигандов, использовании растворителей и фотостабилизирующих матриц, что позволяет избежать множества проблем, возникающих в случае альтернативных подходов.…”

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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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Thermal Dependence of the Luminescent Properties of Mononuclear Tb^III Macrocyclic Complexes

et al. 2021

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A family of six terbium(III) complexes with hexaaza macrocyclic ligands, together with the isostructural yttrium(III) species, is reported and the thermal dependence of the photophysical properties of the terbium(III) complexes is analysed. The coordination number is defined by the anions, nitrate or isothiocyanate, which act as secondary ligands. While complexes with nitrate anions are decacoordinated species, presenting a N 6 O 4 first coordination sphere, complexes derived from isothiocyanate are nonacoordinated with exclusively nitrogen donor atoms. Regarding the optical properties, only the macrocyclic ligands derived from aliphatic amines act as sensitizers for the terbium(III) cations, and the complexes emit in the green region, according to the obtained CIE coordinates. The isothiocyanato ligand plays a detrimental role on the luminescence of the corresponding complexes, since their emission is weaker as compared to that of the nitrato counterparts. The greater achieved thermal sensitivity for one of the studied terbium(III) complexes was 3.2 %K À 1 at 300 K.

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UV laser-induced enhancement of photoluminescence intensity in vitrified terbium(III) β-diketonate complex film in air

Cited by 22 publications

References 46 publications

Construction of three types of lanthanide complexes based on 3,4‐dimethylbenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Syntheses, Structures, Thermodynamic properties, Luminescence, and Bacteriostatic activities

Construction of three types of lanthanide complexes based on 3,4‐dimethylbenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Syntheses, Structures, Thermodynamic properties, Luminescence, and Bacteriostatic activities

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

Thermal Dependence of the Luminescent Properties of Mononuclear Tb^III Macrocyclic Complexes

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UV laser-induced enhancement of photoluminescence intensity in vitrified terbium(III) β-diketonate complex film in air

Cited by 22 publications

References 46 publications

Construction of three types of lanthanide complexes based on 3,4‐dimethylbenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Syntheses, Structures, Thermodynamic properties, Luminescence, and Bacteriostatic activities

Construction of three types of lanthanide complexes based on 3,4‐dimethylbenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Syntheses, Structures, Thermodynamic properties, Luminescence, and Bacteriostatic activities

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

Thermal Dependence of the Luminescent Properties of Mononuclear TbIII Macrocyclic Complexes

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Product

Resources

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Thermal Dependence of the Luminescent Properties of Mononuclear Tb^III Macrocyclic Complexes