ChemInform Abstract: Mixed‐Ligand Complexes of Lanthanoids with Phthalocyanine and Its Analogues: Synthesis, Structure, and Spectroscopic Properties

Nemykin, V. N.; Волков, С. В.

doi:10.1002/chin.200043239

Cited by 3 publications

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“…Pc is an organic semiconductor with 18π electrons, and it has been demonstrated that Ln-Pc double-and triple-decker complexes are capable of forming [18][19][20][21][22][23][24][25][26][27][28][29]. The structures are shown in Figure 2 [30].…”

Section: Structure and Categorymentioning

confidence: 99%

Recent Progress for Single-Molecule Magnets Based on Rare Earth Elements

et al. 2023

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Single-molecule magnets (SMMs) have attracted much attention due to their potential applications in molecular spintronic devices. Rare earth SMMs are considered to be the most promising for application owing to their large magnetic moment and strong magnetic anisotropy. In this review, the recent progress in rare earth SMMs represented by mononuclear and dinuclear complexes is highlighted, especially for the modulation of magnetic anisotropy, effective energy barrier (Ueff) and blocking temperature (TB). The terbium- and dysprosium-based SMMs have a Ueff of 1541 cm−1 and an increased TB of 80 K. They break the boiling point temperature of liquid nitrogen. The development of the preparation technology of rare earth element SMMs is also summarized in an overview. This review has important implications and insights for the design and research of Ln-SMMs.

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Section: Structure and Categorymentioning

confidence: 99%

Recent Progress for Single-Molecule Magnets Based on Rare Earth Elements

et al. 2023

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“…Надалі під керівництвом д. х. н. Чернія В. Я. було вперше синтезовано низку змішанолігандних монофталоціанінових та монотетраазапорфіринових комплексів практично для всього ряду РЗЕ. Для отримання несиметричних сполук та їхніх аналогів було розроблено метод спрямованого синтезу, який полягає в тому, що при взаємодії двох нітрилів, один з яких має об'ємні групи в орто-положеннях до нітрильних, утворюється нестатистична суміш несиметричних сполук [58][59][60][61].…”

Section: початок огляду в № 11 за 2021 рікunclassified

DEVELOPMENT OF RESEARCH OF CHEMISTRY OF COORDINATION COMPOUNDS IN V.I. VERNADSKY INSTITUTE OF GENERAL AND INORGANIC CHEMISTRY NAS OF UKRAINE: FROM THE 30'S TWENTIETH CENTURY (part 2)

2022

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The review considers the main stages of development of the chemistry of coordination compounds at the Institute of General and Inorganic Chemistry. VI Vernadsky National Academy of Sciences of Ukraine on the occasion of the 90th anniversary of its founding. An overview of complex compounds of p, d, f-metals with different classes of ligands (inorganic and organic), features of their synthesis, study of the structure and properties of the obtained compounds, contains current material on the use of synthesized complexes to create functional materials for different purposes. Methods of synthesis have been developed, dozens of new coordination compounds with derivatives of hydrazones, amines, azomethanes, and thiosemicarbazones have been synthesized and isolated in the individual state. Their composition, structure and physicochemical properties are determined. The general regularities that take place in the process of complexation of metals with ligands, as well as factors influencing the composition, structure and physicochemical properties of the obtained coordination compounds are established. For the long history of the Institute has accumulated a huge amount of material on the problems of modern coordination chemistry. Significant research in this area belongs to Ukrainian scientists who have worked long and fruitfully at the Institute: A.K. Babko, К.B. Yatsimirsky, Ya.A. Fialkov, I.A. Sheka, S.V. Volkov, N.A. Kostromina, and who created scientific schools, known not only in Ukraine but also abroad. To date, the attention of scientists of the Institute has shifted from classical monomeric to bigeteronuclear, polynuclear, multiligand complexes, which is primarily due to intensive research of new functional materials: optical and magnetic, biologically active substances, as well as effective adsorbents, chemical sensors, catalysts, catalysts, catalysts and biochemical processes.

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“…This effect opens an opportunity to apply sandwich compounds in various fi elds of science and technology [2][3][4][5][6][7][8]. Nowadays numerous synthetic procedures are known for the preparation of diphthalocyaninates both of symmetric and unsymmetrical structure [9][10][11][12]. A signifi cant number of publications describes also the synthesis and properties of sandwich complexes containing molecules of phthalocyanine and porphyrin [13][14][15][16][17][18][19][20].…”

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Erbium complexes of “sandwich” type containing fragments of meso-tetraphenyltetrabenzoporphyrin and phthalocyanines of different structures synthesis and spectral properties

et al. 2011

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Reactions of erbium acetate meso-tetraphenyltetrabenzoporphyrinate with excess phthalonitrile, 4-nitroand 4-hydroxyphthalonitrile, and also with dilithium (octa-4,5-pentoxy)-phthalocyanine gave rise to unsymmetrical complexes of "sandwich" structure. The spectral properties of compounds synthesized were examined.Compounds of the phthalocyanine series possess unique spectral, electrochromic, magnetic, and semiconductor properties originating from the multicontour conjugation system [1]. These compounds are capable to form complexes with many elements of the Periodic System. The phthalocyaninates of rare-earth elements are especially interesting. Lanthanides possessing large ionic radii and high coordination numbers are able to form with phthalocyanines and their analogs compounds of the "sandwich" structure. The latter are characterized by the overlapping of the π-orbitals of ligands depending on the size of the lanthanide ionic radius and on the geometric structure of the macrocycles. This effect opens an opportunity to apply sandwich compounds in various fi elds of science and technology [2][3][4][5][6][7][8]. Nowadays numerous synthetic procedures are known for the preparation of diphthalocyaninates both of symmetric and unsymmetrical structure [9][10][11][12]. A signifi cant number of publications describes also the synthesis and properties of sandwich complexes containing molecules of phthalocyanine and porphyrin [13][14][15][16][17][18][19][20]. However the information on such complexes containing molecules of phthalocyanine and tetrabenzoporphyrin is scanty [21,22]. We did not fi nd any published information on dimeric structures containing in their composition the molecules of mesotetraphenyltetrabenzoporphyrin and phthalocyanines.We report here on the synthesis and examination of the spectral properties of erbium complexes of sandwich type containing fragments of meso-tetraphenyltetrabenzoporphyrin and phthalocyanine and also the tetra-4-nitro-, tetra-4-hydroxy-, and octa-4,5-pentoxy-derivatives of the latter.As initial compounds for the synthesis of the sandwich complexes meso-tetraphenyltetrabenzoporphyrin (I) was used prepared by the procedure [23] reacting phthalimide with phenylacetic acid in the presence of zinc oxide followed by the demetallation of the formed zinc meso-tetraphenyltetrabenzoporphyrinate with hydrochloric acid. The boiling of the solution in DMF of porphyrin I with excess erbium acetate in the presence of 1,5-diazabicyclo [5.4.0]undec-5-ene (DBU) provided erbium acetate meso-tetraphenyltetrabenzoporphyrinate (II) (Scheme 1).The formation of the complex in the reaction mixture was monitored spectrophotometrically by the disappearance in the electron absorption spectrum (EAS) of the absorption bands at 698 and 634 nm characteristic of ligand I and by the appearance at 652 nm the band corresponding to the Q band of complex II. Due to the large ionic radius of the metal the reaction proceeded relatively slow and completed only within 12 h unlike the

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ChemInform Abstract: Mixed‐Ligand Complexes of Lanthanoids with Phthalocyanine and Its Analogues: Synthesis, Structure, and Spectroscopic Properties

Cited by 3 publications

References 0 publications

Recent Progress for Single-Molecule Magnets Based on Rare Earth Elements

Recent Progress for Single-Molecule Magnets Based on Rare Earth Elements

DEVELOPMENT OF RESEARCH OF CHEMISTRY OF COORDINATION COMPOUNDS IN V.I. VERNADSKY INSTITUTE OF GENERAL AND INORGANIC CHEMISTRY NAS OF UKRAINE: FROM THE 30'S TWENTIETH CENTURY (part 2)

Erbium complexes of “sandwich” type containing fragments of meso-tetraphenyltetrabenzoporphyrin and phthalocyanines of different structures synthesis and spectral properties

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