[Co(solv)6][B10H10] (solv = DMF and DMSO) for low-temperature synthesis of borides

Авдеева, В. В.; Polyakova, I. N.; Вологжанина, Анна В.; Гоева, Л. В.; Бузанов, Г. А.; Генералова, Н. Б.; Малинина, Е. А.; Zhizhin, K. Yu.; Кузнецов, Н. Т.

doi:10.1134/s0036023616090023

Cited by 26 publications

(6 citation statements)

References 14 publications

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“…Precursor complexes containing easily removed ligands have shown their efficiency in the synthesis of metal borides and related compounds [24][25][26][27]. In the present study, copper(II) complexes with hydrazine (N 2 H 4 ) and ammonia (NH 3 ) were chosen as precursor complexes.…”

Section: Resultsmentioning

confidence: 99%

“…In this case, variation in the nature of the boron cluster anions used can affect both the phase composition (the formation of a boride on a boron nitride matrix or in the form of an individual compound) and the structural features of the formed cobalt monoboride. In the case of thermolysis of nickel(II) and cobalt(II) complexes with the closo-decaborate anion [M(solv) 6 ][B 10 H 10 ] (M = Co, Ni; solv = H 2 O, N 2 H 4 , DMF, DMSO) [25][26][27], two-component systems have been obtained: a boron-containing phase and binary metal compounds. In particular, the thermolysis of the nickel(II) complex [Ni(DMF) 6 ][B 10 H 10 ] led to the formation of the solid solution Ni 3 C 1−x B x + Ni 3 C [26], while the thermolysis of the cobalt(II) complex [Co(N 2 H 4 ) 3 ][B 10 H 10 ] led to the BN boron nitride phase and dicobalt boride Co 2 B [27].…”

Section: Introductionmentioning

confidence: 99%

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Physicochemical Fundamentals of the Synthesis of a Cu@BN Composite Consisting of Nanosized Copper Enclosed in a Boron Nitride Matrix

Malinina,

Myshletsov,

Buzanov

et al. 2023

Inorganics

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The thermal reduction of the copper(II) complexes [CuII(N2H4)3][B10H10]·nH2O (I·nH2O) and [CuII(NH3)4][B10H10]·nH2O (II·nH2O) has been studied in an argon atmosphere at 900 °C. It has been found that the annealing of both compounds results in a Cu@BN boron-containing copper composite. It has been shown that this process leads to the formation of a boron nitride matrix doped with cubic copper(0) nanoparticles due to the copper(II)→copper(I)→copper(0) thermal reduction. The phase composition of annealing products I900 and II900 has been determined based on powder X-ray diffraction, IR spectroscopy and thermal analysis data. The morphology, average particle size and composition of the composite have been determined by TEM and high-resolution TEM + EDS. The average particle size has been found to be about 81 nm and 52 nm for samples I900 and II900, respectively. Comparison of the results obtained using physicochemical studies has shown the identity of the composition of the products of annealing I900 and II900. The electrical properties of a coating based on an I900 sample modified with Cu0→Cu2O in situ during deposition on a chip at 300 °C in air have been studied. As a result, with increasing temperature, an increase in the electrical conductivity characteristic of semiconductors has been observed.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physicochemical Fundamentals of the Synthesis of a Cu@BN Composite Consisting of Nanosized Copper Enclosed in a Boron Nitride Matrix

Malinina,

Myshletsov,

Buzanov

et al. 2023

Inorganics

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“…We did not expose it to higher temperatures; however, based on our previous data for closely related compounds, we can expect them to show reasonable thermal stability. Note that cobalt and nickel compounds of the general formula [ML 6 ][B 10 H 10 ] (M = Co, Ni; L = DMF, H 2 O, 1/2N 2 H 4 ) were used for low-temperature synthesis of metal borides [58][59][60][61]; they contain solvent molecules that can be easily removed when heating. Thermal stability data of gold complexes obtained here could be interesting because gold complexes contain metal in a more oxidized form (gold(III)), and in the presence of boron clusters that act as reducing agents, the obtained compounds should be more powerconsuming compounds.…”

Section: Resultsmentioning

confidence: 99%

Gold(III) Complexation in the Presence of the Macropolyhedral Hydridoborate Cluster [B20H18]2−

et al. 2022

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Gold(III) complexation with the octadecahydrido-eicosaborate anion [B20H18]2– was studied for the first time. It was found that when gold(III) complexes [Au(L)Cl2]BF4 (L = bipy, phen) reacted with [B20H18]2–, complexes [Au(L)Cl2]2[B20H18] were isolated. The compounds consisted of a cationic gold(III) complex [Au(L)Cl2]+ and the hydridoborate cluster as a counterion. X-ray diffraction studies revealed weak B–H...Au interactions for both compounds. Note that more reactive anions [BnHn]2– (n = 10, 12) in similar reactions with gold(III) complexes resulted in gold mirror reactions.

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“…First, we synthesized complexes [Co(DMF) 6 ][B 10 H 10 ] and [Co(DMSO) 6 ][B 10 H 10 ] ( Figure 8 ), studied their thermooxidative properties in the temperature range 20–600 °C under argon [ 164 ], and determined the annealing temperature. When comparing the IR data of products of thermolysis performed at 600 °C, it was concluded that boride phases were prepared only for complex [Co(DMF) 6 ][B 10 H 10 ].…”

Section: Boron Cluster Anions As Boron Source For Boron-containing Ma...mentioning

confidence: 99%

Composites and Materials Prepared from Boron Cluster Anions and Carboranes

Avdeeva,

Nikiforova,

Malinina

et al. 2023

Materials

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Here, we present composites and materials that can be prepared starting with boron hydride cluster compounds (decaborane, decahydro-closo-decaborate and dodecahydro-closo-dodecaborate anions and carboranes). Recent examples of their utilization as boron protective coatings including using them to synthesize boron carbide, boron nitride, metal borides, metal-containing composites, and neutron shielding materials are discussed. The data are generalized demonstrate the versatile application of materials based on boron cluster anions and carboranes in various fields.

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[Co(solv)6][B10H10] (solv = DMF and DMSO) for low-temperature synthesis of borides

Cited by 26 publications

References 14 publications

Physicochemical Fundamentals of the Synthesis of a Cu@BN Composite Consisting of Nanosized Copper Enclosed in a Boron Nitride Matrix

Physicochemical Fundamentals of the Synthesis of a Cu@BN Composite Consisting of Nanosized Copper Enclosed in a Boron Nitride Matrix

Gold(III) Complexation in the Presence of the Macropolyhedral Hydridoborate Cluster [B20H18]2−

Composites and Materials Prepared from Boron Cluster Anions and Carboranes

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